const Sequelize = require('sequelize');
const path = require('path');
const bcrypt = require('bcryptjs');

// Initialize database
const dbPath = process.env.DATABASE_URL || 'sqlite://calorie_tracker.db';
const storagePath = dbPath.startsWith('sqlite://') 
  ? dbPath.replace('sqlite://', '') 
  : path.join(__dirname, '../data/calorie_tracker.db');

// Ensure storage path is absolute or relative to cwd correctly
// For Docker, we use /app/data/calorie_tracker.db
const sequelize = new Sequelize({
  dialect: 'sqlite',
  storage: storagePath.startsWith('/') ? storagePath : path.join(process.cwd(), 'data', 'calorie_tracker.db'),
  logging: false
});

const db = {};

// User Model
const User = sequelize.define('User', {
  username: { type: Sequelize.STRING(80), unique: true, allowNull: false },
  password: { type: Sequelize.STRING(200), allowNull: false },
  name: Sequelize.STRING(100),
  age: Sequelize.INTEGER,
  gender: Sequelize.STRING(10),
  height_cm: Sequelize.FLOAT,
  weight_kg: Sequelize.FLOAT,
  activity_level: { type: Sequelize.STRING(20), defaultValue: 'moderate' },
  target_daily_calories: { type: Sequelize.INTEGER, defaultValue: 2000 }
});

// Method to verify password
User.prototype.validPassword = function(password) {
  return bcrypt.compareSync(password, this.password);
};

// Hook to hash password
User.beforeCreate(async (user) => {
  if (user.password) {
    user.password = await bcrypt.hash(user.password, 10);
  }
});

// FoodItem Model
const FoodItem = sequelize.define('FoodItem', {
  name: { type: Sequelize.STRING(200), allowNull: false },
  name_tagalog: Sequelize.STRING(200),
  category: Sequelize.STRING(50),
  calories: { type: Sequelize.FLOAT, allowNull: false },
  protein_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  carbs_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  fat_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  fiber_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  sugar_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  sodium_mg: { type: Sequelize.FLOAT, defaultValue: 0 },
  serving_size_g: { type: Sequelize.FLOAT, defaultValue: 100 },
  serving_description: Sequelize.STRING(100),
  source: { type: Sequelize.STRING(20), defaultValue: 'manual' },
  is_filipino: { type: Sequelize.BOOLEAN, defaultValue: false },
  is_favorite: { type: Sequelize.BOOLEAN, defaultValue: false },
  api_data: Sequelize.TEXT,
  last_updated: { type: Sequelize.DATE, defaultValue: Sequelize.NOW }
});

// Meal Model
const Meal = sequelize.define('Meal', {
  date: { type: Sequelize.DATEONLY, allowNull: false, defaultValue: Sequelize.NOW },
  meal_type: { type: Sequelize.STRING(20), allowNull: false },
  time: Sequelize.TIME,
  notes: Sequelize.TEXT
});

// MealFood Model
const MealFood = sequelize.define('MealFood', {
  quantity: { type: Sequelize.FLOAT, allowNull: false, defaultValue: 1.0 },
  quantity_grams: Sequelize.FLOAT,
  calories_consumed: Sequelize.FLOAT,
  protein_consumed: Sequelize.FLOAT,
  carbs_consumed: Sequelize.FLOAT,
  fat_consumed: Sequelize.FLOAT
});

// WaterLog Model
const WaterLog = sequelize.define('WaterLog', {
  date: { type: Sequelize.DATEONLY, allowNull: false, defaultValue: Sequelize.NOW },
  amount_ml: { type: Sequelize.INTEGER, allowNull: false },
  time: { type: Sequelize.TIME, defaultValue: Sequelize.NOW }
});

// WeightLog Model
const WeightLog = sequelize.define('WeightLog', {
  date: { type: Sequelize.DATEONLY, allowNull: false, defaultValue: Sequelize.NOW },
  weight_kg: { type: Sequelize.FLOAT, allowNull: false },
  body_fat_percentage: Sequelize.FLOAT,
  notes: Sequelize.TEXT,
  time: { type: Sequelize.TIME, defaultValue: Sequelize.NOW }
});

// MealPlan Model
const MealPlan = sequelize.define('MealPlan', {
  date: { type: Sequelize.DATEONLY, allowNull: false },
  meal_type: { type: Sequelize.STRING(20), allowNull: false },
  is_completed: { type: Sequelize.BOOLEAN, defaultValue: false },
  notes: Sequelize.TEXT
});

// PlannedFood Model
const PlannedFood = sequelize.define('PlannedFood', {
  quantity: { type: Sequelize.FLOAT, allowNull: false, defaultValue: 1.0 }
});

// UserGoal Model
const UserGoal = sequelize.define('UserGoal', {
  goal_type: { type: Sequelize.STRING(20), defaultValue: 'recomp' },
  target_weight_kg: Sequelize.FLOAT,
  weekly_goal_kg: { type: Sequelize.FLOAT, defaultValue: 0.5 },
  target_protein_g: { type: Sequelize.INTEGER, defaultValue: 150 },
  target_carbs_g: { type: Sequelize.INTEGER, defaultValue: 200 },
  target_fat_g: { type: Sequelize.INTEGER, defaultValue: 60 },
  target_water_ml: { type: Sequelize.INTEGER, defaultValue: 2000 }
});

// DailySummary Model
const DailySummary = sequelize.define('DailySummary', {
  date: { type: Sequelize.DATEONLY, allowNull: false },
  total_calories: { type: Sequelize.FLOAT, defaultValue: 0 },
  total_protein_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  total_carbs_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  total_fat_g: { type: Sequelize.FLOAT, defaultValue: 0 },
  total_water_ml: { type: Sequelize.INTEGER, defaultValue: 0 },
  calories_remaining: Sequelize.FLOAT,
  weight_kg: Sequelize.FLOAT,
  notes: Sequelize.TEXT
});

// APICache Model
const APICache = sequelize.define('APICache', {
  query: { type: Sequelize.STRING(200), allowNull: false, unique: true },
  api_source: Sequelize.STRING(50),
  response_json: Sequelize.TEXT,
  cached_at: { type: Sequelize.DATE, defaultValue: Sequelize.NOW }
});

// Relationships
User.hasMany(Meal, { onDelete: 'CASCADE' });
Meal.belongsTo(User);

User.hasMany(WeightLog, { onDelete: 'CASCADE' });
WeightLog.belongsTo(User);

User.hasMany(WaterLog, { onDelete: 'CASCADE' });
WaterLog.belongsTo(User);

User.hasMany(MealPlan, { onDelete: 'CASCADE' });
MealPlan.belongsTo(User);

User.hasOne(UserGoal, { onDelete: 'CASCADE' });
UserGoal.belongsTo(User);

Meal.hasMany(MealFood, { onDelete: 'CASCADE' });
MealFood.belongsTo(Meal);

FoodItem.hasMany(MealFood);
MealFood.belongsTo(FoodItem);

MealPlan.hasMany(PlannedFood, { onDelete: 'CASCADE' });
PlannedFood.belongsTo(MealPlan);

FoodItem.hasMany(PlannedFood);
PlannedFood.belongsTo(FoodItem);

User.hasMany(DailySummary, { onDelete: 'CASCADE' });
DailySummary.belongsTo(User);

db.sequelize = sequelize;
db.Sequelize = Sequelize;
db.User = User;
db.FoodItem = FoodItem;
db.Meal = Meal;
db.MealFood = MealFood;
db.WaterLog = WaterLog;
db.WeightLog = WeightLog;
db.MealPlan = MealPlan;
db.PlannedFood = PlannedFood;
db.UserGoal = UserGoal;
db.DailySummary = DailySummary;
db.APICache = APICache;

module.exports = db;