import { DayRepository, FoodLogRepository } from '@/add-log/repository';
import { getDatabase } from '@/remote/database';
import type { FoodLog, FoodRecommendation } from '@/types/foodlog';
import type { Nutrition } from '@/types/nutrition';
import * as Crypto from 'expo-crypto';

const INGREDIENT_NUTRITION: Record<string, Partial<Nutrition>> = {
  'salmon fillet': {
    protein_g: 22,
    fat_g: 12,
    omega_3_mg: 2000,
    vitamin_d_mcg: 11,
    b12_mcg: 3,
    usa_gov_dga_protein_g: 22,
  },
  salmon: {
    protein_g: 20,
    fat_g: 13,
    omega_3_mg: 2000,
    vitamin_d_mcg: 11,
    b12_mcg: 3,
    usa_gov_dga_protein_g: 20,
  },
  'beef sirloin': {
    protein_g: 26,
    fat_g: 8,
    iron_mg: 2.8,
    b12_mcg: 2.6,
    zinc_mg: 5,
    usa_gov_dga_protein_g: 26,
  },
  'ground beef': {
    protein_g: 20,
    fat_g: 17,
    iron_mg: 2.5,
    b12_mcg: 2.5,
    zinc_mg: 5,
    usa_gov_dga_protein_g: 20,
  },
  'silken tofu': { protein_g: 5, fat_g: 2.5, calcium_mg: 150, usa_gov_dga_protein_g: 5 },
  'canned anchovies': {
    protein_g: 29,
    fat_g: 10,
    omega_3_mg: 2000,
    sodium_mg: 1200,
    calcium_mg: 230,
    usa_gov_dga_protein_g: 29,
  },
  'salted duck egg': { protein_g: 9, fat_g: 14, sodium_mg: 800, usa_gov_dga_protein_g: 9 },
  'preserved duck egg': { protein_g: 9, fat_g: 10, iron_mg: 2.5, usa_gov_dga_protein_g: 9 },
  'brown rice': {
    carbs_g: 23,
    protein_g: 2.6,
    fiber_g: 1.8,
    magnesium_mg: 44,
    usa_gov_dga_whole_grains_oz_eq: 1,
  },
  'mixed rice': { carbs_g: 25, protein_g: 2.5, fiber_g: 1.2, magnesium_mg: 30 },
  rice: { carbs_g: 28, protein_g: 2.7, fiber_g: 0.4 },
  'instant ramen': { carbs_g: 52, protein_g: 10, fat_g: 14, sodium_mg: 1800 },
  'iceberg lettuce': {
    carbs_g: 3,
    fiber_g: 1.2,
    a_mcg: 25,
    k_mcg: 24,
    usa_gov_dga_vegetables_cup_eq: 0.3,
    usa_gov_dga_other_veg_cup_eq: 0.3,
  },
  lettuce: {
    carbs_g: 2,
    fiber_g: 1.3,
    a_mcg: 370,
    k_mcg: 126,
    usa_gov_dga_vegetables_cup_eq: 0.3,
    usa_gov_dga_dark_green_veg_cup_eq: 0.3,
  },
  kale: {
    carbs_g: 9,
    fiber_g: 3.6,
    a_mcg: 500,
    k_mcg: 817,
    c_mg: 120,
    usa_gov_dga_vegetables_cup_eq: 0.5,
    usa_gov_dga_dark_green_veg_cup_eq: 0.5,
  },
  radish: {
    carbs_g: 4,
    fiber_g: 1.6,
    c_mg: 15,
    usa_gov_dga_vegetables_cup_eq: 0.3,
    usa_gov_dga_other_veg_cup_eq: 0.3,
  },
  onion: {
    carbs_g: 9,
    fiber_g: 1.7,
    c_mg: 7.4,
    usa_gov_dga_vegetables_cup_eq: 0.2,
    usa_gov_dga_other_veg_cup_eq: 0.2,
  },
  'cherry tomatoes': {
    carbs_g: 4,
    fiber_g: 1.2,
    c_mg: 14,
    potassium_mg: 237,
    lycopene_mcg: 2573,
    usa_gov_dga_vegetables_cup_eq: 0.5,
    usa_gov_dga_red_orange_veg_cup_eq: 0.5,
  },
  kimchi: {
    fiber_g: 2,
    c_mg: 18,
    probiotics_cfu: 1000000000,
    sodium_mg: 670,
    usa_gov_dga_vegetables_cup_eq: 0.3,
    usa_gov_dga_other_veg_cup_eq: 0.3,
  },
  banana: {
    carbs_g: 23,
    fiber_g: 2.6,
    potassium_mg: 358,
    b6_mg: 0.4,
    c_mg: 9,
    usa_gov_dga_fruits_cup_eq: 0.5,
  },
  tangerine: { carbs_g: 13, fiber_g: 1.8, c_mg: 27, usa_gov_dga_fruits_cup_eq: 0.5 },
  figs: {
    carbs_g: 19,
    fiber_g: 3,
    potassium_mg: 232,
    calcium_mg: 35,
    usa_gov_dga_fruits_cup_eq: 0.5,
  },
  'mala hua jiao you': { fat_g: 100 },
  coffee: { caffeine_mg: 95, magnesium_mg: 7 },
  'vitamin c': { c_mg: 1000 },
  'vitamin d': { vitamin_d_mcg: 50 },
  'fish oil': { omega_3_mg: 1000, epa_mg: 400, dha_mg: 300 },
  'lutein and zeaxanthin': { lutein_zeaxanthin_mcg: 10000 },
  'quercetin and bromelain': {},
  'homocysteine nutrients': { b6_mg: 10, b9_mcg: 400, b12_mcg: 500 },
  'vitamin b12': { b12_mcg: 1000 },
};

export function computeNutrition(ingredients: string[]): Nutrition {
  const result: Nutrition = {};
  for (const ingredient of ingredients) {
    const key = ingredient.toLowerCase();
    const data = INGREDIENT_NUTRITION[key];
    if (data) {
      for (const [k, v] of Object.entries(data)) {
        const nutrientKey = k as keyof Nutrition;
        result[nutrientKey] = (result[nutrientKey] ?? 0) + (v ?? 0);
      }
    }
  }
  return result;
}

export const DEMO_FOODLOGS: Pick<FoodLog, 'foodName' | 'ingredients' | 'eatenAt' | 'date'>[] = [
  {
    foodName: 'Salmon Bowl',
    ingredients: ['salmon fillet', 'brown rice', 'iceberg lettuce', 'banana'],
    eatenAt: '2026-01-18T12:00:00.000Z',
    date: '2026-01-18',
  },
  {
    foodName: 'Salmon Salad Rice',
    ingredients: ['iceberg lettuce', 'mixed rice', 'salmon', 'tangerine'],
    eatenAt: '2026-01-17T12:00:00.000Z',
    date: '2026-01-17',
  },
  {
    foodName: 'Daily Supplements',
    ingredients: [
      'vitamin c',
      'vitamin d',
      'fish oil',
      'lutein and zeaxanthin',
      'quercetin and bromelain',
      'homocysteine nutrients',
      'vitamin b12',
    ],
    eatenAt: '2026-01-16T08:00:00.000Z',
    date: '2026-01-16',
  },
  {
    foodName: 'Morning Coffee',
    ingredients: ['coffee'],
    eatenAt: '2026-01-16T09:00:00.000Z',
    date: '2026-01-16',
  },
  {
    foodName: 'Fruit and Rice',
    ingredients: ['cherry tomatoes', 'banana', 'mixed rice'],
    eatenAt: '2026-01-16T12:00:00.000Z',
    date: '2026-01-16',
  },
  {
    foodName: 'Beef Stir Fry',
    ingredients: ['beef sirloin', 'radish', 'onion'],
    eatenAt: '2026-01-16T19:00:00.000Z',
    date: '2026-01-16',
  },
  {
    foodName: 'Korean Breakfast',
    ingredients: ['salted duck egg', 'kimchi', 'mixed rice', 'beef sirloin', 'radish', 'onion'],
    eatenAt: '2026-01-15T08:00:00.000Z',
    date: '2026-01-15',
  },
  {
    foodName: 'Beef Dinner',
    ingredients: ['beef sirloin', 'radish', 'onion'],
    eatenAt: '2026-01-15T19:00:00.000Z',
    date: '2026-01-15',
  },
  {
    foodName: 'Korean Beef Bowl',
    ingredients: ['beef sirloin', 'preserved duck egg', 'onion', 'radish', 'rice', 'figs'],
    eatenAt: '2026-01-14T12:00:00.000Z',
    date: '2026-01-14',
  },
  {
    foodName: 'Mala Tofu Salad',
    ingredients: ['mala hua jiao you', 'lettuce', 'kale', 'silken tofu', 'ground beef'],
    eatenAt: '2026-01-13T12:00:00.000Z',
    date: '2026-01-13',
  },
  {
    foodName: 'Quick Lunch',
    ingredients: ['banana', 'canned anchovies', 'instant ramen', 'coffee'],
    eatenAt: '2026-01-13T15:00:00.000Z',
    date: '2026-01-13',
  },
];

type DayRecommendations = { date: string; ingredients: string[]; foods: FoodRecommendation[] };

export const DEMO_RECOMMENDATIONS: DayRecommendations[] = [
  {
    date: '2026-01-18',
    ingredients: [
      'Spinach',
      'Greek Yogurt',
      'Almonds',
      'Chickpeas',
      'Sweet Potato',
      'Broccoli',
      'Lentils',
      'Avocado',
      'Edamame',
      'Chia Seeds',
      'Sardines',
      'Bell Pepper',
      'Quinoa',
      'Eggs',
      'Kale',
    ],
    foods: [
      {
        recommendedFoodName: 'Spinach Egg Scramble',
        ingredients: ['spinach', 'eggs', 'feta', 'olive oil'],
      },
      {
        recommendedFoodName: 'Greek Yogurt Parfait',
        ingredients: ['greek yogurt', 'berries', 'almonds', 'honey'],
      },
      {
        recommendedFoodName: 'Chickpea Curry',
        ingredients: ['chickpeas', 'spinach', 'coconut milk', 'tomatoes'],
      },
    ],
  },
];

export async function seedDemoData(): Promise<void> {
  const db = getDatabase();
  const foodLogRepo = new FoodLogRepository(db);
  const dayRepo = new DayRepository(db);

  const existingLogs = await foodLogRepo.getAll();
  if (existingLogs.length > 0) return;

  for (const log of DEMO_FOODLOGS) {
    const eatenAt = new Date(log.eatenAt);
    const nutrition = computeNutrition(log.ingredients);
    const dayId = await dayRepo.getOrCreateDay('demo', eatenAt);

    await foodLogRepo.create({
      id: Crypto.randomUUID(),
      profileId: 'demo',
      dayId,
      foodName: log.foodName,
      ingredients: log.ingredients,
      nutrition,
      eatenAt,
      status: 'completed',
    });
  }

  for (const rec of DEMO_RECOMMENDATIONS) {
    await dayRepo.updateRecommendations('demo', rec.date, rec.ingredients, rec.foods);
  }
}