import BaseService from './BaseService.js';
import { Sequelize, Op } from 'sequelize';

import FalukantPredefineFirstname from '../models/falukant/predefine/firstname.js';
import FalukantPredefineLastname from '../models/falukant/predefine/lastname.js';
import FalukantUser from '../models/falukant/data/user.js';
import FalukantCharacter from '../models/falukant/data/character.js';
import RegionData from '../models/falukant/data/region.js';
import RegionType from '../models/falukant/type/region.js';
import FalukantStock from '../models/falukant/data/stock.js';
import FalukantStockType from '../models/falukant/type/stock.js';
import TitleOfNobility from '../models/falukant/type/title_of_nobility.js';
import Branch from '../models/falukant/data/branch.js';
import BranchType from '../models/falukant/type/branch.js';
import Production from '../models/falukant/data/production.js';
import ProductType from '../models/falukant/type/product.js';
import Knowledge from '../models/falukant/data/product_knowledge.js';
import Inventory from '../models/falukant/data/inventory.js';
import MoneyFlow from '../models/falukant/log/moneyflow.js';
import User from '../models/community/user.js';
import { notifyUser } from '../utils/socket.js';
import { differenceInDays } from 'date-fns';
import { updateFalukantUserMoney } from '../utils/sequelize.js';
import BuyableStock from '../models/falukant/data/buyable_stock.js';
import DirectorProposal from '../models/falukant/data/director_proposal.js';
import Director from '../models/falukant/data/director.js';
import DaySell from '../models/falukant/log/daysell.js';


function calcAge(birthdate) {
    const b = new Date(birthdate); b.setHours(0, 0);
    const now = new Date(); now.setHours(0, 0);
    return differenceInDays(now, b);
}

async function getFalukantUserOrFail(hashedId) {
    const user = await FalukantUser.findOne({
        include: [{ model: User, as: 'user', attributes: ['username', 'hashedId'], where: { hashedId } }]
    });
    if (!user) throw new Error('User not found');
    return user;
}

async function getBranchOrFail(userId, branchId) {
    const branch = await Branch.findOne({ where: { id: branchId, falukantUserId: userId } });
    if (!branch) throw new Error('Branch not found');
    return branch;
}

function calcSellPrice(product, knowledgeFactor = 0) {
    const max = product.sellCost;
    const min = max * 0.6;
    return min + (max - min) * (knowledgeFactor / 100);
}

class FalukantService extends BaseService {
    async getFalukantUserByHashedId(hashedId) {
        return FalukantUser.findOne({
            include: [{ model: User, as: 'user', attributes: ['username', 'hashedId'], where: { hashedId } }]
        });
    }

    async getUser(hashedUserId) {
        const u = await FalukantUser.findOne({
            include: [
                { model: User, as: 'user', attributes: ['username', 'hashedId'], where: { hashedId: hashedUserId } },
                {
                    model: FalukantCharacter,
                    as: 'character',
                    include: [
                        { model: FalukantPredefineFirstname, as: 'definedFirstName', attributes: ['name'] },
                        { model: FalukantPredefineLastname, as: 'definedLastName', attributes: ['name'] },
                        { model: TitleOfNobility, as: 'nobleTitle', attributes: ['labelTr'] }
                    ],
                    attributes: ['birthdate', 'gender']
                },
                {
                    model: RegionData,
                    as: 'mainBranchRegion',
                    include: [{ model: RegionType, as: 'regionType' }],
                    attributes: ['name']
                },
                {
                    model: Branch,
                    as: 'branches',
                    include: [
                        { model: BranchType, as: 'branchType', attributes: ['labelTr'] },
                        {
                            model: RegionData,
                            as: 'region',
                            include: [{ model: RegionType, as: 'regionType' }],
                            attributes: ['name']
                        }
                    ]
                }
            ],
            attributes: ['money', 'creditAmount', 'todayCreditTaken']
        });
        if (!u) throw new Error('User not found');
        if (u.character?.birthdate) u.character.setDataValue('age', calcAge(u.character.birthdate));
        return u;
    }

    async randomFirstName(gender) {
        const names = await FalukantPredefineFirstname.findAll({ where: { gender } });
        return names[Math.floor(Math.random() * names.length)].name;
    }

    async randomLastName() {
        const names = await FalukantPredefineLastname.findAll();
        return names[Math.floor(Math.random() * names.length)].name;
    }

    async createUser(hashedUserId, gender, firstName, lastName) {
        const user = await this.getUserByHashedId(hashedUserId);
        if (await FalukantUser.findOne({ where: { userId: user.id } })) throw new Error('User already exists in Falukant.');
        let fnObj = await FalukantPredefineFirstname.findOne({ where: { name: firstName } });
        let lnObj = await FalukantPredefineLastname.findOne({ where: { name: lastName } });
        if (!fnObj) fnObj = await FalukantPredefineFirstname.create({ name: firstName, gender });
        if (!lnObj) lnObj = await FalukantPredefineLastname.create({ name: lastName });
        const region = await RegionData.findOne({
            order: Sequelize.fn('RANDOM'),
            limit: 1,
            include: [{ model: RegionType, as: 'regionType', where: { labelTr: 'city' } }]
        });
        if (!region) throw new Error('No region found with the label "city".');
        const nobility = await TitleOfNobility.findOne({ where: { labelTr: 'noncivil' } });
        if (!nobility) throw new Error('No title of nobility found with the label "noncivil".');
        const falukantUser = await FalukantUser.create({
            userId: user.id, money: 50, creditAmount: 0, todayCreditTaken: 0, creditInterestRate: 0, mainBranchRegionId: region.id
        });
        const date = new Date(); date.setDate(date.getDate() - 14);
        const ch = await FalukantCharacter.create({
            userId: falukantUser.id, regionId: region.id, firstName: fnObj.id, lastName: lnObj.id, gender, birthdate: date, titleOfNobility: nobility.id
        });
        const stType = await FalukantStockType.findOne({ where: [{ label_tr: 'wood' }] });
        await FalukantStock.create({ userId: falukantUser.id, regionId: region.id, stockTypeId: stType.id, quantity: 10 });
        falukantUser.character = ch;
        const bType = await BranchType.findOne({ where: { labelTr: 'fullstack' } });
        await Branch.create({ userId: falukantUser.id, regionId: region.id, branchTypeId: bType.id });
        notifyUser(user.hashedId, 'reloadmenu', {});
        return falukantUser;
    }

    async getInfo(hashedUserId) {
        const user = await User.findOne({ where: { hashedId: hashedUserId } });
        if (!user) throw new Error('User not found');
        const falukantUser = await FalukantUser.findOne({
            include: [
                { model: User, as: 'user', attributes: ['hashedId'], where: { hashedId: hashedUserId } },
                { model: FalukantCharacter, as: 'character', attributes: ['birthdate', 'health'] }
            ],
            attributes: ['money']
        });
        if (!falukantUser) throw new Error('User not found');
        if (falukantUser.character?.birthdate) falukantUser.character.setDataValue('age', calcAge(falukantUser.character.birthdate));
        return falukantUser;
    }

    async getBranches(hashedUserId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const bs = await Branch.findAll({
            where: { falukantUserId: u.id },
            include: [
                { model: BranchType, as: 'branchType', attributes: ['labelTr'] },
                { model: RegionData, as: 'region', attributes: ['name'] }
            ],
            attributes: ['id', 'regionId'],
            order: [['branchTypeId', 'ASC']]
        });
        return bs.map(b => ({ ...b.toJSON(), isMainBranch: u.mainBranchRegionId === b.regionId }));
    }

    async getBranch(hashedUserId, branchId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const br = await Branch.findOne({
            where: { id: branchId, falukantUserId: u.id },
            include: [
                { model: BranchType, as: 'branchType', attributes: ['labelTr'] },
                { model: RegionData, as: 'region', attributes: ['name'] },
                {
                    model: Production,
                    as: 'productions',
                    attributes: ['quantity', 'startTimestamp'],
                    include: [{ model: ProductType, as: 'productType', attributes: ['id', 'category', 'labelTr', 'sellCost', 'productionTime'] }]
                }
            ],
            attributes: ['id', 'regionId']
        });
        if (!br) throw new Error('Branch not found');
        return br;
    }

    async getStock(hashedUserId, branchId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const b = await getBranchOrFail(u.id, branchId);
        return FalukantStock.findAll({ where: { regionId: b.regionId, userId: u.id } });
    }

    async createStock(hashedUserId, branchId, stockData) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const b = await getBranchOrFail(u.id, branchId);
        return FalukantStock.create({
            userId: u.id, regionId: b.regionId, stockTypeId: stockData.stockTypeId, quantity: stockData.quantity
        });
    }

    async createProduction(hashedUserId, branchId, productId, quantity) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const b = await getBranchOrFail(u.id, branchId);
        const p = await ProductType.findOne({ where: { id: productId } });
        if (!p) throw new Error('Product not found');
        const cost = quantity * p.category * 6;
        if (u.money < cost) throw new Error('notenoughmoney');
        const r = await updateFalukantUserMoney(u.id, -cost, 'Production cost', u.id);
        if (!r.success) throw new Error('Failed to update money');
        const d = await Production.create({ branchId: b.id, productId, quantity });
        notifyUser(u.user.hashedId, 'falukantUpdateStatus', {});
        notifyUser(u.user.hashedId, 'falukantBranchUpdate', { branchId: b.id });
        return d;
    }

    async getProduction(hashedUserId, branchId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const b = await getBranchOrFail(u.id, branchId);
        return Production.findOne({ where: { regionId: b.regionId } });
    }

    async getProducts(hashedUserId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        console.log(u);
        const c = await FalukantCharacter.findOne({ where: { userId: u.id } });
        console.log(c);
        if (!c) {
            throw new Error(`No FalukantCharacter found for user with id ${u.id}`);
        }
        const ps = await ProductType.findAll({
            where: { category: { [Op.lte]: u.certificate } },
            include: [{ model: Knowledge, as: 'knowledges', attributes: ['knowledge'], where: { characterId: c.id } }],
            attributes: ['labelTr', 'id', 'sellCost', 'productionTime', 'category']
        });
        return ps;
    }

    async getInventory(hashedUserId, branchId) {
        const u = await getFalukantUserOrFail(hashedUserId);
        const f = branchId ? { id: branchId, falukantUserId: u.id } : { falukantUserId: u.id };
        const br = await Branch.findAll({
            where: f,
            include: [
                { model: FalukantStock, as: 'stocks', include: [{ model: FalukantStockType, as: 'stockType' }] },
                { model: RegionData, as: 'region', include: [{ model: RegionType, as: 'regionType' }] }
            ]
        });
        const stockIds = br.flatMap(b => b.stocks.map(s => s.id));
        const inv = await Inventory.findAll({
            where: { stockId: stockIds },
            include: [
                {
                    model: FalukantStock,
                    as: 'stock',
                    include: [
                        {
                            model: Branch,
                            as: 'branch',
                            include: [{ model: RegionData, as: 'region', include: [{ model: RegionType, as: 'regionType' }] }]
                        },
                        { model: FalukantStockType, as: 'stockType' }
                    ]
                },
                { model: ProductType, as: 'productType' }
            ]
        });
        const grouped = inv.reduce((acc, i) => {
            const r = i.stock.branch.region;
            const k = `${r.id}-${i.productType.id}-${i.quality}`;
            acc[k] = acc[k] || { region: r, product: i.productType, quality: i.quality, totalQuantity: 0 };
            acc[k].totalQuantity += i.quantity;
            return acc;
        }, {});
        return Object.values(grouped).sort((a, b) => {
            if (a.region.id !== b.region.id) return a.region.id - b.region.id;
            if (a.product.id !== b.product.id) return a.product.id - b.product.id;
            return a.quality - b.quality;
        });
    }

    async sellProduct(hashedUserId, branchId, productId, quality, quantity) {
        const user = await getFalukantUserOrFail(hashedUserId);
        const branch = await getBranchOrFail(user.id, branchId);
        const character = await FalukantCharacter.findOne({ where: { userId: user.id } });
        if (!character) throw new Error('No character found for user');
        const stock = await FalukantStock.findOne({ where: { branchId: branch.id } });
        if (!stock) throw new Error('Stock not found');
        const inventory = await Inventory.findAll({
            where: { stockId: stock.id, quality },
            include: [
                {
                    model: ProductType,
                    as: 'productType',
                    required: true,
                    where: { id: productId },
                    include: [
                        {
                            model: Knowledge,
                            as: 'knowledges',
                            required: false,
                            where: { characterId: character.id }
                        }
                    ]
                }
            ]
        });
        if (!inventory.length) throw new Error('No inventory found');
        const available = inventory.reduce((sum, i) => sum + i.quantity, 0);
        if (available < quantity) throw new Error('Not enough inventory available');
        const item = inventory[0].productType;
        const knowledgeVal = item.knowledges?.[0]?.knowledge || 0;
        const revenue = quantity * calcSellPrice(item, knowledgeVal);
        const moneyResult = await updateFalukantUserMoney(user.id, revenue, 'Product sale', user.id);
        if (!moneyResult.success) throw new Error('Failed to update money');
        let remaining = quantity;
        for (const inv of inventory) {
            if (inv.quantity <= remaining) {
                remaining -= inv.quantity;
                await inv.destroy();
            } else {
                await inv.update({ quantity: inv.quantity - remaining });
                remaining = 0;
                break;
            }
        }
        await this.addSellItem(branchId, falukantUser.id, productId, quantity);
        notifyUser(user.user.hashedId, 'falukantUpdateStatus', {});
        notifyUser(user.user.hashedId, 'falukantBranchUpdate', { branchId: branch.id });
        return { success: true };
    }

    async sellAllProducts(hashedUserId, branchId) {
        const falukantUser = await getFalukantUserOrFail(hashedUserId);
        const branch = await Branch.findOne({
            where: { id: branchId, falukantUserId: falukantUser.id },
            include: [{ model: FalukantStock, as: 'stocks' }]
        });
        if (!branch) throw new Error('Branch not found');
        const stockIds = branch.stocks.map(s => s.id);
        const character = await FalukantCharacter.findOne({ where: { userId: falukantUser.id } });
        if (!character) throw new Error('No character for user');
        const inventory = await Inventory.findAll({
            where: { stockId: stockIds },
            include: [
                {
                    model: ProductType,
                    as: 'productType',
                    include: [
                        {
                            model: Knowledge,
                            as: 'knowledges',
                            required: false,
                            where: {
                                characterId: character.id
                            }
                        }
                    ]
                },
                {
                    model: FalukantStock,
                    as: 'stock',
                    include: [
                        {
                            model: Branch,
                            as: 'branch'
                        },
                        {
                            model: FalukantStockType,
                            as: 'stockType'
                        }
                    ]
                }
            ]
        });
        if (!inventory.length) return { success: true, revenue: 0 };
        let total = 0;
        for (const item of inventory) {
            const knowledgeVal = item.productType.knowledges[0]?.knowledge || 0;
            total += item.quantity * calcSellPrice(item.productType, knowledgeVal);
            await this.addSellItem(item.stock[0].branch[0].id, falukantUser.id, item.productType.id, item.quantity);
        }
        const moneyResult = await updateFalukantUserMoney(
            falukantUser.id,
            total,
            'Sell all products',
            falukantUser.id
        );
        if (!moneyResult.success) throw new Error('Failed to update money');
        for (const item of inventory) {
            await Inventory.destroy({ where: { id: item.id } });
        }
        notifyUser(falukantUser.user.hashedId, 'falukantUpdateStatus', {});
        notifyUser(falukantUser.user.hashedId, 'falukantBranchUpdate', {});
        return { success: true, revenue: total };
    }

    async addSellItem(branchId, userId, productId, quantity) {
        const branch = await Branch.findOne({
            where: { id: branchId },
        })
        ;
        const daySell = await DaySell.findOne({
            where: {
                regionId: regionId,
                productId: productId,
                sellerId: userId,
            }
        });
        if (daySell) {
            daySell.quantity += quantity;
            await daySell.save();
        } else {
            await DaySell.create({
                regionId: regionId,
                productId: productId,
                sellerId: userId,
                quantity: quantity,
            });
        }
    }

    async moneyHistory(hashedUserId, page = 1, filter = '') {
        const u = await getFalukantUserOrFail(hashedUserId);
        const limit = 25, offset = (page - 1) * limit;
        const w = { falukantUserId: u.id };
        if (filter) w.activity = { [Op.iLike]: `%${filter}%` };
        const { rows, count } = await MoneyFlow.findAndCountAll({
            where: w, order: [['time', 'DESC']], limit, offset
        });
        return { data: rows, total: count, currentPage: page, totalPages: Math.ceil(count / limit) };
    }

    async getStorage(hashedUserId, branchId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        const branch = await getBranchOrFail(user.id, branchId);
        const stocks = await FalukantStock.findAll({
            where: { branchId: branch.id },
            include: [{ model: FalukantStockType, as: 'stockType' }],
        });
        const stockIds = stocks.map(s => s.id);
        const inventoryItems = await Inventory.findAll({
            where: { stockId: stockIds },
            include: [
                {
                    model: FalukantStock,
                    as: 'stock',
                    include: [{ model: FalukantStockType, as: 'stockType' }],
                },
            ],
        });
        let totalUsedCapacity = 0;
        const usageByType = {};
        for (const s of stocks) {
            const stId = s.stockTypeId;
            if (!usageByType[stId]) {
                usageByType[stId] = {
                    stockTypeId: stId,
                    stockTypeLabelTr: s.stockType?.labelTr || `stockType:${stId}`,
                    totalCapacity: 0,
                    used: 0
                };
            }
            usageByType[stId].totalCapacity += s.quantity;
        }
        for (const item of inventoryItems) {
            totalUsedCapacity += item.quantity;
            const stId = item.stock.stockTypeId;
            if (!usageByType[stId]) {
                usageByType[stId] = {
                    stockTypeId: stId,
                    stockTypeLabelTr: item.stock.stockType?.labelTr || `stockType:${stId}`,
                    totalCapacity: 0,
                    used: 0
                };
            }
            usageByType[stId].used += item.quantity;
        }
        const buyableStocks = await BuyableStock.findAll({
            where: { regionId: branch.regionId },
            include: [{ model: FalukantStockType, as: 'stockType' }],
        });
        const buyableByType = {};
        for (const b of buyableStocks) {
            const stId = b.stockTypeId;
            if (!buyableByType[stId]) {
                buyableByType[stId] = {
                    stockTypeId: stId,
                    stockTypeLabelTr: b.stockType?.labelTr || `stockType:${stId}`,
                    quantity: 0
                };
            }
            buyableByType[stId].quantity += b.quantity;
        }
        let maxCapacity = stocks.reduce((sum, s) => sum + s.quantity, 0);
        return {
            branchId,
            totalUsedCapacity,
            maxCapacity,
            usageByType: Object.values(usageByType),
            buyableByType: Object.values(buyableByType)
        };
    }

    async buyStorage(hashedUserId, branchId, amount, stockTypeId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        const branch = await getBranchOrFail(user.id, branchId);
        const buyable = await BuyableStock.findOne({
            where: { regionId: branch.regionId, stockTypeId },
            include: [{ model: FalukantStockType, as: 'stockType' }]
        });
        if (!buyable || buyable.quantity < amount) throw new Error('Not enough buyable stock');
        const costPerUnit = buyable.stockType.cost;
        const totalCost = costPerUnit * amount;
        if (user.money < totalCost) throw new Error('notenoughmoney');
        const moneyResult = await updateFalukantUserMoney(
            user.id,
            -totalCost,
            `Buy storage (type: ${buyable.stockType.labelTr})`,
            user.id
        );
        if (!moneyResult.success) throw new Error('Failed to update money');
        buyable.quantity -= amount;
        await buyable.save();
        const stock = await FalukantStock.findOne({
            where: { branchId: branch.id, stockTypeId },
            include: [{ model: FalukantStockType, as: 'stockType' }]
        });
        if (!stock) throw new Error('No stock record found for this branch and stockType');
        stock.quantity += amount;
        await stock.save();
        return { success: true, bought: amount, totalCost, stockType: buyable.stockType.labelTr };
    }

    async sellStorage(hashedUserId, branchId, amount, stockTypeId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        const branch = await getBranchOrFail(user.id, branchId);
        const stock = await FalukantStock.findOne({
            where: { branchId: branch.id, stockTypeId },
            include: [{ model: FalukantStockType, as: 'stockType' }]
        });
        if (!stock || stock.quantity < amount) throw new Error('Not enough stock to sell');
        const costPerUnit = stock.stockType.cost;
        const totalRevenue = costPerUnit * amount;
        const moneyResult = await updateFalukantUserMoney(
            user.id,
            totalRevenue,
            `Sell storage (type: ${stock.stockType.labelTr})`,
            user.id
        );
        if (!moneyResult.success) throw new Error('Failed to update money');
        stock.quantity -= amount;
        await stock.save();
        const buyable = await BuyableStock.findOne({
            where: { regionId: branch.regionId, stockTypeId },
            include: [{ model: FalukantStockType, as: 'stockType' }]
        });
        if (!buyable) throw new Error('No buyable record found for this region and stockType');
        buyable.quantity += amount;
        await buyable.save();
        return { success: true, sold: amount, totalRevenue, stockType: stock.stockType.labelTr };
    }

    async notifyRegionUsersAboutStockChange(regionId) {
        const users = await FalukantCharacter.findAll({
            where: {
                regionId: regionId
            },
            include: [
                {
                    model: FalukantUser,
                    as: 'user',
                    include: [
                        {
                            model: User,
                            as: 'user'
                        },
                        {
                            model: Branch,
                            as: 'branch',
                            where: {
                                regionId: regionId
                            }
                        }
                    ]
                }
            ]
        });
        for (const user of users) {
            notifyUser(user.user[0].user[0].hashedId, 'stock_change', { branchId: user.user[0].branch[0].id });
        }
    }

    async getStockTypes() {
        return FalukantStockType.findAll();
    }

    async getStockOverview() {
        const items = await Inventory.findAll({
            include: [
                {
                    model: FalukantStock,
                    as: 'stock',
                    include: [
                        {
                            model: Branch,
                            as: 'branch',
                            include: [{ model: RegionData, as: 'region' }]
                        }
                    ]
                },
                {
                    model: ProductType,
                    as: 'productType'
                }
            ]
        });
        const result = items.map(inv => ({
            regionName: inv.stock?.branch?.region?.name || '???',
            productLabelTr: inv.productType?.labelTr || '???',
            quantity: inv.quantity
        }));
        return result;
    }

    async getAllProductions(hashedUserId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        const productions = await Production.findAll({
            include: [
                {
                    model: Branch,
                    as: 'branch',
                    include: [
                        { model: RegionData, as: 'region', attributes: ['name'] }
                    ],
                    where: { falukantUserId: user.id }
                },
                { model: ProductType, as: 'productType', attributes: ['labelTr', 'productionTime'] }
            ],
            attributes: ['startTimestamp', 'quantity'],
        });
        const formattedProductions = productions.map((production) => {
            const startTimestamp = new Date(production.startTimestamp).getTime();
            const endTimestamp = startTimestamp + production.productType.productionTime * 60 * 1000;
            return {
                cityName: production.branch.region.name,
                productName: production.productType.labelTr,
                quantity: production.quantity,
                endTimestamp: new Date(endTimestamp).toISOString(),
            };
        });
        formattedProductions.sort((a, b) => new Date(a.endTimestamp) - new Date(b.endTimestamp));
        return formattedProductions;
    }

    async getDirectorProposals(hashedUserId, branchId) {
        const user = await this.getFalukantUserByHashedId(hashedUserId);
        if (!user) {
            throw new Error('User not found');
        }
        const branch = await Branch.findOne({ where: { id: branchId, falukantUserId: user.id } });
        if (!branch) {
            throw new Error('Branch not found or does not belong to the user');
        }
        const { falukantUserId, regionId } = branch;
        await this.deleteExpiredProposals();
        const existingProposals = await this.fetchProposals(falukantUserId, regionId);
        if (existingProposals.length > 0) {
            return this.formatProposals(existingProposals);
        }
        await this.generateProposals(falukantUserId, regionId);
        const newProposals = await this.fetchProposals(falukantUserId, regionId);
        return this.formatProposals(newProposals);
    }
    
    async deleteExpiredProposals() {
        const expirationTime = new Date(Date.now() - 24 * 60 * 60 * 1000);
        await DirectorProposal.destroy({
            where: {
                createdAt: {
                    [Op.lt]: expirationTime,
                },
            },
        });
    }
    
    async fetchProposals(falukantUserId, regionId) {
        return DirectorProposal.findAll({
            where: { employerUserId: falukantUserId },
            include: [
                {
                    model: FalukantCharacter,
                    as: 'character',
                    attributes: ['firstName', 'lastName', 'birthdate', 'titleOfNobility', 'gender'],
                    where: { regionId },
                    include: [
                        { model: FalukantPredefineFirstname, as: 'definedFirstName' },
                        { model: FalukantPredefineLastname, as: 'definedLastName' },
                        { model: TitleOfNobility, as: 'nobleTitle' },
                        { 
                            model: Knowledge, 
                            as: 'knowledges',
                            include: [
                                { model: ProductType, as: 'productType' },
                            ] 
                        },
                    ],
                },
            ],
        });
    }
    
    async generateProposals(falukantUserId, regionId) {
        const proposalCount = Math.floor(Math.random() * 3) + 3;
        for (let i = 0; i < proposalCount; i++) {
            const directorCharacter = await FalukantCharacter.findOne({
                where: {
                    regionId,
                    createdAt: {
                        [Op.lt]: new Date(Date.now() - 21 * 24 * 60 * 60 * 1000),
                    },
                },
                order: Sequelize.fn('RANDOM'),
            });
            if (!directorCharacter) {
                throw new Error('No directors available for the region');
            }
            const avgKnowledge = await this.calculateAverageKnowledge(directorCharacter.id);
            const proposedIncome = Math.round(
                directorCharacter.titleOfNobility * Math.pow(1.231, avgKnowledge / 1.5)
            );
            await DirectorProposal.create({
                directorCharacterId: directorCharacter.id,
                employerUserId: falukantUserId,
                proposedIncome,
            });
        }
    }
    
    async calculateAverageKnowledge(characterId) {
        const averageKnowledge = await Knowledge.findAll({
            where: { characterId },
            attributes: [[Sequelize.fn('AVG', Sequelize.col('knowledge')), 'avgKnowledge']],
            raw: true,
        });
        return parseFloat(averageKnowledge[0]?.avgKnowledge || 0);
    }
    
    formatProposals(proposals) {
        return proposals.map((proposal) => {
            const age = Math.floor((Date.now() - new Date(proposal.character.birthdate)) / (24 * 60 * 60 * 1000));
            const knowledge = proposal.character.knowledges?.map(k => ({
                productId: k.productId,
                value: k.knowledge,
                labelTr: k.productType.labelTr,
            })) || [];
            return {
                id: proposal.id,
                proposedIncome: proposal.proposedIncome,
                character: {
                    name: `${proposal.character.definedFirstName.name} ${proposal.character.definedLastName.name}`,
                    title: proposal.character.nobleTitle.labelTr,
                    age,
                    knowledge,
                    gender: proposal.character.gender,
                },
            };
        });
    }
    
    async convertProposalToDirector(hashedUserId, proposalId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        if (!user) {
            throw new Error('User not found');
        }
        const proposal = await DirectorProposal.findOne(
            { 
                where: { id: proposalId },
                include: [
                    { model: FalukantCharacter, as: 'character' },
                ]
            }
        );
        if (!proposal || proposal.employerUserId !== user.id) {
            throw new Error('Proposal does not belong to the user');
        }

        const existingDirector = await Director.findOne({ 
            where: { 
                employerUserId: user.id 
            },
            include: [
                { 
                    model: FalukantCharacter, 
                    as: 'character',
                    where: {
                        regionId: proposal.character.regionId,
                    }
                },
            ] 
        });
        if (existingDirector) {
            throw new Error('A director already exists for this region');
        }
        const newDirector = await Director.create({
            directorCharacterId: proposal.directorCharacterId,
            employerUserId: proposal.employerUserId,
            income: proposal.proposedIncome,
        });
        const regionUserDirectorProposals = await DirectorProposal.findAll({
            where: {
                employerUserId: proposal.employerUserId,
            },
            include: [
                { 
                    model: FalukantCharacter, 
                    as: 'character',
                    where: {
                        regionId: proposal.character.regionId,
                    }
                },
            ]
        });
        if (regionUserDirectorProposals.length > 0) {
            for (const proposal of regionUserDirectorProposals) {
                await DirectorProposal.destroy();
            }
        }
        notifyUser(hashedUserId, 'directorchanged');
        return newDirector;
    }

    async getDirectorForBranch(hashedUserId, branchId) {
        const user = await getFalukantUserOrFail(hashedUserId);
        if (!user) {
            throw new Error('User not found');
        }
        const branch = await Branch.findOne({ where: { id: branchId, falukantUserId: user.id } });
        if (!branch) {
            throw new Error('Branch not found or does not belong to the user');
        }
        const director = await Director.findOne({
            where: { employerUserId: user.id },
            include: [
                {
                    model: FalukantCharacter,
                    as: 'character',
                    attributes: ['firstName', 'lastName', 'birthdate', 'titleOfNobility', 'gender'],
                    where: {
                        regionId: branch.regionId,
                    },
                    include: [
                        {
                            model: TitleOfNobility,
                            as: 'nobleTitle'
                        },
                        {
                            model: FalukantPredefineFirstname,
                            as: 'definedFirstName'
                        },
                        {
                            model: FalukantPredefineLastname,
                            as: 'definedLastName'
                        },
                    ]
                },
            ],
        });
        if (!director) {
            return null;
        }
        const age = Math.floor((Date.now() - new Date(director.character.birthdate)) / (24 * 60 * 60 * 1000));
        return {
            director: {
                id: director.id,
                character: {
                    name: `${director.character.definedFirstName.name} ${director.character.definedLastName.name}`,
                    title: director.character.nobleTitle.labelTr,
                    age,
                    gender: director.character.gender,
                },
                income: director.income,
                satisfaction: director.satisfaction,
                mayProduce: director.mayProduce,
                maySell: director.maySell,
                mayStartTransport: director.mayStartTransport,
            },
        };
    }

    async setSetting(hashedUserId, branchId, directorId, settingKey, value) {
        const user = await this.getFalukantUserByHashedId(hashedUserId);
        const branch = await Branch.findOne({
            where: {
                id: branchId,
                falukantUserId: user.id,
            },
        });
        if (!branch) {
            return null;
        }
        const director = await Director.findOne({
            where: {
                id: directorId,
                employerUserId: user.id,
            },
            include: [{
                model: FalukantCharacter,
                as: 'character',
                where: {
                    regionId: branch.regionId,
                }
            }]
        });
        if (!director) {
            return null;
        }
        const updateData = {};
        updateData[settingKey] = value || false;
    
        await Director.update(updateData, {
            where: {
                id: director.id,
            },
        });
        return { result: 'ok' };
    }

    async getMarriageProposals(hashedUserId) {
        const user = await this.getFalukantUserByHashedId(hashedUserId);
        const character = await FalukantCharacter.findOne({ where: { userId: user.id } });
        if (!character) {
            throw new Error('Character not found for this user');
        }
        const midnight = new Date();
        midnight.setHours(0, 0, 0, 0); 
        await MarriageProposal.destroy({
            where: {
                [Op.or]: [
                    { requesterCharacterId: character.id },
                    { proposedCharacterId: character.id },
                ],
                createdAt: {
                    [Op.lt]: midnight,
                },
            },
        });
        let proposals = await MarriageProposal.findAll({
            where: {
                [Op.or]: [
                    { requesterCharacterId: character.id },
                    { proposedCharacterId: character.id },
                ],
            },
        });
        if (proposals.length === 0) {
            const proposalCount = Math.floor(Math.random() * 4) + 3; // 3–6
            const thirteenDaysAgo = new Date(Date.now() - 13 * 24 * 60 * 60 * 1000);
            const possiblePartners = await FalukantCharacter.findAll({
                where: {
                    id: { [Op.ne]: character.id },
                    createdAt: { [Op.lt]: thirteenDaysAgo },
                },
                order: [sequelize.fn('RANDOM')],
            });
            if (possiblePartners.length === 0) {
                return []; 
            }
            const newProposals = [];
            for (let i = 0; i < proposalCount; i++) {
                const partner = possiblePartners[i % possiblePartners.length];
                const createdProposal = await MarriageProposal.create({
                    requesterCharacterId: character.id,
                    proposedCharacterId: partner.id,
                    courtingProgress: 0,
                });
                newProposals.push(createdProposal);
            }
            proposals = newProposals;
        }
        return proposals;
    }
}

export default new FalukantService();