// /seed.js
const mongoose = require('mongoose');
const config = require('./config/config');
const Role = require('./components/roles/roleModel');
const User = require('./components/users/userModel');
const { ALL_PERMISSIONS, PERMISSIONS } = require('./constants/permissions');
const bcrypt = require('bcryptjs');

const defaultRoles = [
  {
    name: 'SuperAdmin',
    description: 'مدیر ارشد سیستم با دسترسی کامل به تمام بخش‌ها',
    permissions: ALL_PERMISSIONS,
    isSystem: true
  },
  {
    name: 'Admin',
    description: 'مدیر سیستم',
    permissions: ALL_PERMISSIONS.filter(p => !p.startsWith('roles:')),
    isSystem: true
  },
  {
    name: 'Secretary',
    description: 'منشی و مسئول ثبت‌نام، امور دانشجویان و پرداخت‌ها',
    permissions: [
      PERMISSIONS.USERS_CREATE,
      PERMISSIONS.USERS_READ,
      PERMISSIONS.USERS_UPDATE,
      PERMISSIONS.USERS_SEARCH,
      PERMISSIONS.USERS_ENROLL,
      PERMISSIONS.CLASSES_READ,
      PERMISSIONS.CLASSES_SEARCH,
      PERMISSIONS.CLASSES_REGISTER_USERS,
      PERMISSIONS.COURSES_READ,
      PERMISSIONS.COURSES_SEARCH,
      PERMISSIONS.SESSIONS_READ,
      PERMISSIONS.SESSIONS_SEARCH,
      PERMISSIONS.SESSIONS_ATTENDANCE,
      PERMISSIONS.PAYMENTS_CREATE,
      PERMISSIONS.PAYMENTS_READ,
      PERMISSIONS.PAYMENTS_UPDATE,
      PERMISSIONS.PAYMENTS_SEARCH,
      PERMISSIONS.NOTIFICATIONS_CREATE,
      PERMISSIONS.NOTIFICATIONS_READ,
      PERMISSIONS.NOTIFICATIONS_SEARCH,
      PERMISSIONS.NOTIFICATIONS_RETRY,
      PERMISSIONS.CERTIFICATES_CREATE,
      PERMISSIONS.CERTIFICATES_READ,
      PERMISSIONS.CERTIFICATES_SEARCH,
      PERMISSIONS.FILES_UPLOAD,
      PERMISSIONS.FILES_READ,
      PERMISSIONS.LOGS_READ,
      PERMISSIONS.LOGS_SEARCH,
      PERMISSIONS.CONTACT_INQUIRIES_READ,
      PERMISSIONS.CONTACT_INQUIRIES_UPDATE
    ],
    isSystem: true
  },
  {
    name: 'User',
    description: 'کاربر معمولی و دانشجو',
    permissions: [
      PERMISSIONS.COURSES_READ,
      PERMISSIONS.COURSES_SEARCH,
      PERMISSIONS.CLASSES_READ,
      PERMISSIONS.CLASSES_SEARCH,
      PERMISSIONS.SESSIONS_READ,
      PERMISSIONS.SESSIONS_SEARCH,
      PERMISSIONS.PAYMENTS_READ,
      PERMISSIONS.NOTIFICATIONS_READ,
      PERMISSIONS.CERTIFICATES_READ,
      PERMISSIONS.FILES_READ
    ],
    isSystem: true
  },
  {
    name: 'Professor',
    description: 'استاد مدرس دوره',
    permissions: [
      PERMISSIONS.COURSES_READ,
      PERMISSIONS.COURSES_SEARCH,
      PERMISSIONS.CLASSES_READ,
      PERMISSIONS.CLASSES_SEARCH,
      PERMISSIONS.SESSIONS_READ,
      PERMISSIONS.SESSIONS_SEARCH,
      PERMISSIONS.SESSIONS_ATTENDANCE,
      PERMISSIONS.NOTIFICATIONS_READ,
      PERMISSIONS.FILES_READ
    ],
    isSystem: true
  }
];

const seedDatabase = async ({ disconnectOnComplete = false } = {}) => {
  try {
    if (mongoose.connection.readyState !== 1) {
      console.log('Connecting to MongoDB...');
      await mongoose.connect(config.MONGO_URI);
      console.log('Connected to MongoDB successfully.');
    }

    let rolesCreatedCount = 0;
    let rolesUpdatedCount = 0;

    for (const roleDef of defaultRoles) {
      const existing = await Role.findOne({ name: roleDef.name });
      if (existing) {
        existing.description = roleDef.description;
        existing.permissions = roleDef.permissions;
        existing.isSystem = roleDef.isSystem;
        await existing.save();
        rolesUpdatedCount++;
        console.log(`Updated existing role: ${roleDef.name}`);
      } else {
        await Role.create(roleDef);
        rolesCreatedCount++;
        console.log(`Created new role: ${roleDef.name}`);
      }
    }

    let superAdminStatus = 'unchanged';
    // Ensure SuperAdmin user exists
    const superAdminRole = await Role.findOne({ name: 'SuperAdmin' });
    if (superAdminRole) {
      const adminUser = await User.findOne({ username: config.SUPERADMIN_USERNAME });
      if (!adminUser) {
        const passwordHash = await bcrypt.hash(config.SUPERADMIN_PASSWORD, 10);
        await User.create({
          name: 'مدیر',
          surname: 'ارشد',
          nationalId: config.SUPERADMIN_NATIONAL_ID,
          phone: config.SUPERADMIN_PHONE,
          email: config.SUPERADMIN_EMAIL,
          username: config.SUPERADMIN_USERNAME,
          passwordHash,
          role: superAdminRole._id,
          isActive: true
        });
        superAdminStatus = 'created';
        console.log(`SuperAdmin user created (${config.SUPERADMIN_USERNAME}).`);
      } else {
        superAdminStatus = 'already_exists';
      }
    }

    console.log('Database seeding completed successfully.');
    return {
      success: true,
      rolesCreatedCount,
      rolesUpdatedCount,
      superAdminStatus,
      superAdminUsername: config.SUPERADMIN_USERNAME
    };
  } catch (error) {
    console.error('Database seeding failed:', error);
    throw error;
  } finally {
    if (disconnectOnComplete) {
      await mongoose.disconnect();
      console.log('Disconnected from MongoDB.');
    }
  }
};

if (require.main === module) {
  seedDatabase({ disconnectOnComplete: true });
}

module.exports = seedDatabase;