const express = require('express')
const emailAPI = require('../../../email/email-api')

module.exports = function (options) {
    const db = options.db;
    var router = express.Router();

    router.route('/')
        .get(function(request, response, next) {
            response.display("password-reset-initiation", {
                user: request.user,
                pageTitle: "Password Reset - Mantra"
            })
        }).post(function(request, response, next) {
            // TODO: Create UserPasswordReset object.
            // TODO: Send email with link to /account/password-reset/:id
            db.User.findOne({
                include: [
                    {
                        association: db.User.UserEmails,
                        required: true,
                        where: {
                            emailAddress: request.body.email
                        }
                    },
                    {
                        association: db.User.UserPasswordReset
                    }
                    // TODO: Include user.UserPasswordReset
                ]
            }).then(user => {
                if (user) {
                    // TODO: Check if user already created a password reset artifact to save on a db transaction
                    return Promise.all([
                        user.userEmails[0],
                        user.userPasswordReset ? user.userPasswordReset : db.UserPasswordReset.create({
                            userId: user.id
                        })
                    ])
                } else {
                    return [null, null]
                }
            }).then(async (results) => {
                userEmail = results[0]
                userPasswordReset = results[1]
                if (userPasswordReset) {
                    await userPasswordReset.increment('sent')
                    // Send password reset email...
                    return emailAPI.sendPasswordResetEmail(userPasswordReset.token, userEmail.emailAddress)
                    
                } else {
                    return null
                }
            }).then(emailResult => {
                if (emailResult) {
                    response.display("password-reset-initiated", {
                        user: request.user,
                        pageTitle: "Password Reset Initiated - Mantra"
                    })
                } else {
                    // TODO: Check if email is an immigrant
                    db.Immigrant.findOne({
                        where: {
                            emailAddress: request.body.email           
                        },
                        include: [
                            {
                                association: db.Immigrant.User,
                            },
                            {
                                association: db.Immigrant.Email,
                                required: true,
                            }
                        ]
                    }).then(async (immigrant) => {
                        if (immigrant && immigrant.user == null) {
                            // Resend invitation
                            await emailAPI.sendImmigrationInvitationEmail(
                                immigrant.id, immigrant.emailAddress, immigrant.displayName
                            )
                            
                            response.display("password-reset-initiated", {
                                user: request.user,
                                pageTitle: "Password Reset Initiated - Mantra"
                            })
                        } else {
                            next(`Failed to create a user password reset artifact (user ${request.body.email} doesn't exist)`)
                        }
                    }).catch (error => {
                        next(error)
                    })
                    // TODO: Create password reset error page with possible reasons...
                    
                }
            }).catch(reason => {
                console.error("Something went wrong with reset: ", reason)
                // TODO: Tell user
                next(reason)
            })
            
        })

    router.route('/:token')
        .get(function(request, response, next) {
            if (request.user) {
                // TODO: 
                response.display("logout-to-continue", {
                    user: request.user,
                    pageTitle: "Logout Before Continue - Mantra"
                })
            } else {
                db.UserPasswordReset.findByPk(request.params.token, {
                    include: [
                        {
                            association: db.UserPasswordReset.User
                        }
                    ]
                })
                .then(userPasswordReset => {
                    if (userPasswordReset) {
                        response.display("password-reset", {
                            user: request.user,
                            pageTitle: "Password Reset - Mantra",
                            userPasswordReset: userPasswordReset
                        })
                    } else {
                        next()
                    }
                }).catch(error => {
                    next(error)
                })
            }
            
        }).post(function(request, response, next) {
            if (Boolean(request.body.password) && request.body.password == request.body.confirmPassword) {
                db.UserPasswordReset.findByPk(request.params.token, {
                    include: [
                        {
                            association: db.UserPasswordReset.User,
                            required: true,
                            include: [
                                {
                                    association: db.User.Passwords,
                                    required: true
                                }
                            ]
                        }
                    ]
                }).then(userPasswordReset => {
                    if (userPasswordReset) {
                        var password = userPasswordReset.user.passwords[0]
                        password.password = request.body.password // Password will be hashed...
                        return Promise.all([userPasswordReset, password.save()])
                    } else {
                        return [null, null]
                    }
                }).then(results => {
                    userPasswordReset = results[0]
                    password = results[1]
                    if (password) {
                        // Password reset success invite user to reset...
                        response.redirect("/account")
                        // Cleanup...
                        userPasswordReset.destroy({
                            force: true
                        }).then(() => {})
                        .catch(reason => console.error("Failed to destroy userPasswordReset", reason))
                    } else {
                        // TODO: Give user failed password page...
                        next("Failed to reset password")
                    }
                }).catch(error => {
                    next(error)
                })
            } else {
                // TODO: Tell user password reset failed..
                next("Passwords do not match")
            }
            
        })
    return router;
};