import * as userService from '../services/authService.js';
import * as oauthService from '../services/oauthService.js';

class AuthController {
    constructor() {
        this.register = this.register.bind(this);
        this.login = this.login.bind(this);
        this.forgotPassword = this.forgotPassword.bind(this);
        this.activateAccount = this.activateAccount.bind(this);
        this.logout = this.logout.bind(this);
        this.oauthProviders = this.oauthProviders.bind(this);
        this.oauthStart = this.oauthStart.bind(this);
        this.oauthExchange = this.oauthExchange.bind(this);
        this.oauthUserIdentities = this.oauthUserIdentities.bind(this);
        this.oauthUserStart = this.oauthUserStart.bind(this);
        this.oauthUserExchange = this.oauthUserExchange.bind(this);
        this.oauthUserRemove = this.oauthUserRemove.bind(this);
    }

    async register(req, res) {
        const { email, username, password, language } = req.body;
        try {
            const result = await userService.registerUser({ email, username, password, language });
            res.status(201).json(result);
        } catch (error) {
            console.log(error);
            res.status(500).json({ error: error.message });
        }
    }

    async login(req, res) {
        const { username, password } = req.body;
        try {
            const result = await userService.loginUser({ username, password });
            console.log('User logged in successfully', result);
            res.status(200).json(result);
        } catch (error) {
            if (error.message === 'credentialsinvalid') {
                res.status(404).json({ error: error.message });
            } else if (error.message === 'userblocked') {
                res.status(403).json({ error: error.message });
            } else {
                res.status(500).json({ error: error.message });
            }
        }
    }

    async logout(req, res) {
        const { userid: hashedUserId } = req.headers;
        await userService.logoutUser(hashedUserId);
        res.status(200).json({ result: 'loggedout' });
    }

    async oauthProviders(req, res) {
        try {
            const providers = await oauthService.getOAuthProviders();
            res.status(200).json({ providers });
        } catch (error) {
            res.status(500).json({ error: error.message });
        }
    }

    async oauthStart(req, res) {
        const { provider } = req.params;
        try {
            const redirectTo = await oauthService.startOAuthLogin({ providerSlug: provider });
            res.redirect(302, redirectTo.toString());
        } catch (error) {
            const status = error.message === 'providernotconfigured' ? 503 : 500;
            res.status(status).json({ error: error.message });
        }
    }

    async oauthExchange(req, res) {
        const { code, state, iss } = req.body;
        try {
            const result = await oauthService.exchangeOAuthLogin({ code, state, iss });
            res.status(200).json(result);
        } catch (error) {
            const knownErrors = new Set([
                'oauthcodemissing',
                'oauthstatemissing',
                'oauthsubjectmissing',
                'providernotconfigured',
                'oauthidentityconflict'
            ]);
            const status = knownErrors.has(error.message) ? 400 : 500;
            res.status(status).json({ error: error.message });
        }
    }

    async oauthUserIdentities(req, res) {
        const { userid: hashedUserId } = req.headers;
        try {
            const User = (await import('../models/community/user.js')).default;
            const user = await User.findOne({ where: { hashedId: hashedUserId } });
            if (!user) {
                return res.status(404).json({ error: 'usernotfound' });
            }

            const identities = await oauthService.getUserOAuthIdentities(user.id);
            res.status(200).json({ identities });
        } catch (error) {
            res.status(500).json({ error: error.message });
        }
    }

    async oauthUserStart(req, res) {
        const hashedUserId = req.headers.userid || req.query.userid;
        const { provider } = req.params;
        try {
            const User = (await import('../models/community/user.js')).default;
            const user = await User.findOne({ where: { hashedId: hashedUserId } });
            if (!user) {
                return res.status(404).json({ error: 'usernotfound' });
            }

            const redirectTo = await oauthService.startOAuthLoginForUser({
                userId: user.id,
                providerSlug: provider
            });
            res.redirect(302, redirectTo.toString());
        } catch (error) {
            const status = error.message === 'providernotconfigured' ? 503 : 500;
            res.status(status).json({ error: error.message });
        }
    }

    async oauthUserExchange(req, res) {
        const hashedUserId = req.headers.userid || req.query.userid;
        const { code, state, iss } = req.body;
        try {
            const User = (await import('../models/community/user.js')).default;
            const user = await User.findOne({ where: { hashedId: hashedUserId } });
            if (!user) {
                return res.status(404).json({ error: 'usernotfound' });
            }

            const result = await oauthService.exchangeOAuthLoginForUser({
                userId: user.id,
                code,
                state,
                iss
            });
            res.status(200).json(result);
        } catch (error) {
            const knownErrors = new Set([
                'oauthcodemissing',
                'oauthstatemissing',
                'oauthsubjectmissing',
                'providernotconfigured',
                'oauthuseridmismatch',
                'oauthidentityalreadylinked'
            ]);
            const status = knownErrors.has(error.message) ? 400 : 500;
            res.status(status).json({ error: error.message });
        }
    }

    async oauthUserRemove(req, res) {
        const { userid: hashedUserId } = req.headers;
        const { identityId } = req.params;
        try {
            const User = (await import('../models/community/user.js')).default;
            const user = await User.findOne({ where: { hashedId: hashedUserId } });
            if (!user) {
                return res.status(404).json({ error: 'usernotfound' });
            }

            const result = await oauthService.removeOAuthIdentity({
                userId: user.id,
                identityId: parseInt(identityId, 10)
            });
            res.status(200).json(result);
        } catch (error) {
            const status = error.message === 'forbidden' ? 403 : 500;
            res.status(status).json({ error: error.message });
        }
    }


    async forgotPassword(req, res) {
        const { email } = req.body;
        try {
            const result = await userService.handleForgotPassword({ email });
            res.status(200).json(result);
        } catch (error) {
            res.status(500).json({ error: error.message });
        }
    }

    async activateAccount(req, res) {
        const { token } = req.body;
        try {
            const result = await userService.activateUserAccount({ token });
            res.status(200).json(result);
        } catch (error) {
            res.status(500).json({ error: error.message });
        }
    }
}

export default AuthController;