const jwt = require('jsonwebtoken');
const bcrypt = require('bcryptjs');
const User = require('../../models/User');
const Street = require('../../models/Street');
const Task = require('../../models/Task');
const Post = require('../../models/Post');
const Event = require('../../models/Event');
const Reward = require('../../models/Reward');
const Report = require('../../models/Report');

/**
 * Create a test user and return user object with token
 */
async function createTestUser(overrides = {}) {
  const defaultUser = {
    name: 'Test User',
    email: 'test@example.com',
    password: 'password123',
  };

  const userData = { ...defaultUser, ...overrides };

  const user = await User.create(userData);

  const token = jwt.sign(
    { user: { id: user._id } },
    process.env.JWT_SECRET,
    { expiresIn: 3600 }
  );

  return { user, token };
}

/**
 * Create multiple test users
 */
async function createTestUsers(count = 2) {
  const users = [];
  for (let i = 0; i < count; i++) {
    const { user, token } = await createTestUser({
      name: `Test User ${i + 1}`,
      email: `test${i + 1}@example.com`,
    });
    users.push({ user, token });
  }
  return users;
}

/**
 * Create a test street
 */
async function createTestStreet(userId, overrides = {}) {
  const defaultStreet = {
    name: 'Test Street',
    location: {
      type: 'Point',
      coordinates: [-73.935242, 40.730610],
    },
    city: 'Test City',
    state: 'TS',
  };

  // Add adoptedBy if userId is provided
  if (userId) {
    const user = await User.findById(userId);
    if (user) {
      defaultStreet.adoptedBy = {
        userId: user._id,
        name: user.name,
        profilePicture: user.profilePicture || ''
      };
      defaultStreet.status = 'adopted';
    }
  }

  const street = await Street.create({ ...defaultStreet, ...overrides });
  return street;
}

/**
 * Create a test task
 */
async function createTestTask(userId, streetId, overrides = {}) {
  // Get street details for embedding
  const street = await Street.findById(streetId);
  const streetData = {
    streetId: street._id,
    name: street.name,
    location: street.location
  };

  const defaultTask = {
    street: streetData,
    description: 'Test task description',
    type: 'cleaning',
    status: 'pending',
  };

  // Add completedBy if userId is provided
  if (userId) {
    const user = await User.findById(userId);
    if (user) {
      defaultTask.completedBy = {
        userId: user._id,
        name: user.name,
        profilePicture: user.profilePicture || ''
      };
      defaultTask.status = 'completed';
    }
  }

  const task = await Task.create({ ...defaultTask, ...overrides });
  return task;
}

/**
 * Create a test post
 */
async function createTestPost(userId, overrides = {}) {
  const defaultPost = {
    user: userId,
    content: 'Test post content',
    type: 'text',
  };

  const post = await Post.create({ ...defaultPost, ...overrides });
  return post;
}

/**
 * Create a test event
 */
async function createTestEvent(userId, overrides = {}) {
  const defaultEvent = {
    title: 'Test Event',
    description: 'Test event description',
    date: new Date(Date.now() + 86400000).toISOString(), // Tomorrow
    location: 'Test Location',
  };

  const event = await Event.create({ ...defaultEvent, ...overrides });
  
  // Add participant if userId is provided
  if (userId) {
    const user = await User.findById(userId);
    if (user) {
      await Event.addParticipant(event._id, userId, user.name, user.profilePicture || '');
    }
  }
  
  return event;
}

/**
 * Create a test reward
 */
async function createTestReward(overrides = {}) {
  const defaultReward = {
    name: 'Test Reward',
    description: 'Test reward description',
    cost: 100,
  };

  // Handle legacy field name mapping
  const rewardData = { ...defaultReward, ...overrides };
  if (rewardData.pointsCost && !rewardData.cost) {
    rewardData.cost = rewardData.pointsCost;
    delete rewardData.pointsCost;
  }

  const reward = await Reward.create(rewardData);
  return reward;
}

/**
 * Create a test report
 */
async function createTestReport(userId, streetId, overrides = {}) {
  const defaultReport = {
    street: streetId,
    reporter: userId,
    type: 'pothole',
    description: 'Test report description',
    status: 'pending',
  };

  const report = await Report.create({ ...defaultReport, ...overrides });
  return report;
}

/**
 * Clean up all test data
 */
async function cleanupDatabase() {
  const couchdbService = require('../../services/couchdbService');
  await couchdbService.initialize();
  
  // Delete all documents by type
  const types = ['user', 'street', 'task', 'post', 'event', 'reward', 'report', 'badge', 'user_badge', 'point_transaction'];
  
  for (const type of types) {
    try {
      const docs = await couchdbService.findByType(type);
      for (const doc of docs) {
        await couchdbService.deleteDocument(doc._id, doc._rev);
      }
    } catch (error) {
      console.error(`Error cleaning up ${type}s:`, error.message);
    }
  }
}

module.exports = {
  createTestUser,
  createTestUsers,
  createTestStreet,
  createTestTask,
  createTestPost,
  createTestEvent,
  createTestReward,
  createTestReport,
  cleanupDatabase,
};