import { Language } from '../../types';
import { BackendDatabaseEntry } from './contracts';
import { LEXICON_BATCH_1_ENTRIES } from '../../constants/lexiconBatch1';
import { LEXICON_BATCH_2_ENTRIES } from '../../constants/lexiconBatch2';
import { normalizeSearchText, rankHybridEntries } from '../../utils/hybridSearch';

interface MockPlantSeed {
  botanicalName: string;
  names: Record<Language, string>;
  descriptions: Record<Language, string>;
  imageUri: string;
  categories: string[];
  baseConfidence: number;
  care: {
    waterIntervalDays: number;
    light: Record<Language, string>;
    temp: string;
  };
}

const PLANTS: MockPlantSeed[] = [
  {
    botanicalName: 'Monstera deliciosa',
    names: { de: 'Monstera', en: 'Monstera', es: 'Monstera' },
    descriptions: {
      de: 'Beliebte Zimmerpflanze mit grossen gelochten Blaettern. Mag helles indirektes Licht.',
      en: 'Popular indoor plant with large split leaves. Prefers bright indirect light.',
      es: 'Planta de interior popular con hojas grandes. Prefiere luz brillante indirecta.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Monstera_deliciosa2.jpg/500px-Monstera_deliciosa2.jpg',
    categories: ['easy', 'low_light', 'air_purifier'],
    baseConfidence: 0.76,
    care: {
      waterIntervalDays: 7,
      light: { de: 'Halbschatten', en: 'Partial shade', es: 'Sombra parcial' },
      temp: '18-24C',
    },
  },
  {
    botanicalName: 'Sansevieria trifasciata',
    names: { de: 'Bogenhanf', en: 'Snake Plant', es: 'Lengua de suegra' },
    descriptions: {
      de: 'Sehr robust und trockenheitsvertraeglich. Kommt auch mit wenig Licht klar.',
      en: 'Very resilient and drought tolerant. Handles low light well.',
      es: 'Muy resistente y tolera sequia. Funciona bien con poca luz.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Snake_Plant_%28Sansevieria_trifasciata_%27Laurentii%27%29.jpg/500px-Snake_Plant_%28Sansevieria_trifasciata_%27Laurentii%27%29.jpg',
    categories: ['easy', 'succulent', 'low_light'],
    baseConfidence: 0.73,
    care: {
      waterIntervalDays: 14,
      light: { de: 'Schatten bis Sonne', en: 'Shade to sun', es: 'Sombra a sol' },
      temp: '16-30C',
    },
  },
  {
    botanicalName: 'Aloe vera',
    names: { de: 'Aloe Vera', en: 'Aloe Vera', es: 'Aloe Vera' },
    descriptions: {
      de: 'Sukkulente mit heilender Gelstruktur in den Blaettern. Braucht viel Licht.',
      en: 'Succulent with gel-filled leaves. Needs plenty of light.',
      es: 'Suculenta con hojas de gel. Necesita bastante luz.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Aloe_vera_flower_inset.png/500px-Aloe_vera_flower_inset.png',
    categories: ['succulent', 'easy', 'sun'],
    baseConfidence: 0.78,
    care: {
      waterIntervalDays: 12,
      light: { de: 'Sonnig', en: 'Sunny', es: 'Soleado' },
      temp: '18-30C',
    },
  },
  {
    botanicalName: 'Epipremnum aureum',
    names: { de: 'Efeutute', en: 'Pothos', es: 'Poto' },
    descriptions: {
      de: 'Schnell wachsende Haengepflanze fuer Einsteiger. Vertraegt variierende Bedingungen.',
      en: 'Fast-growing trailing plant ideal for beginners. Handles varied conditions.',
      es: 'Planta colgante de crecimiento rapido para principiantes.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Money_Plant_%28Epipremnum_aureum%29_4.jpg/500px-Money_Plant_%28Epipremnum_aureum%29_4.jpg',
    categories: ['easy', 'hanging', 'air_purifier'],
    baseConfidence: 0.74,
    care: {
      waterIntervalDays: 7,
      light: { de: 'Halbschatten bis hell', en: 'Partial shade to bright', es: 'Sombra parcial a brillante' },
      temp: '18-27C',
    },
  },
  {
    botanicalName: 'Spathiphyllum',
    names: { de: 'Einblatt', en: 'Peace Lily', es: 'Cuna de moises' },
    descriptions: {
      de: 'Bluetenpflanze fuer Innenraeume. Zeigt Wasserbedarf schnell durch haengende Blaetter.',
      en: 'Indoor flowering plant. Droops clearly when it needs water.',
      es: 'Planta de flor de interior. Muestra rapido cuando necesita riego.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Spathiphyllum_cochlearispathum_RTBG.jpg/500px-Spathiphyllum_cochlearispathum_RTBG.jpg',
    categories: ['flowering', 'low_light'],
    baseConfidence: 0.72,
    care: {
      waterIntervalDays: 5,
      light: { de: 'Halbschatten', en: 'Partial shade', es: 'Sombra parcial' },
      temp: '18-26C',
    },
  },
  {
    botanicalName: 'Zamioculcas zamiifolia',
    names: { de: 'Gluecksfeder', en: 'ZZ Plant', es: 'Planta ZZ' },
    descriptions: {
      de: 'Extrem pflegeleichte Pflanze mit dickem Rhizom. Perfekt fuer wenig Zeit.',
      en: 'Extremely low-maintenance plant with thick rhizomes. Great for busy schedules.',
      es: 'Planta muy facil de cuidar con rizomas gruesos.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Zamioculcas_zamiifolia_1.jpg/500px-Zamioculcas_zamiifolia_1.jpg',
    categories: ['easy', 'low_light'],
    baseConfidence: 0.77,
    care: {
      waterIntervalDays: 14,
      light: { de: 'Wenig Licht bis hell', en: 'Low light to bright', es: 'Poca luz a brillante' },
      temp: '18-28C',
    },
  },
  {
    botanicalName: 'Calathea orbifolia',
    names: { de: 'Korbmarante', en: 'Calathea', es: 'Calathea' },
    descriptions: {
      de: 'Dekorative Blaetter mit Muster. Liebt gleichmaessige Feuchte und hohe Luftfeuchtigkeit.',
      en: 'Decorative patterned leaves. Prefers steady moisture and humidity.',
      es: 'Hojas decorativas con patron. Prefiere humedad constante.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Calathea_orbifolia_2.jpg/500px-Calathea_orbifolia_2.jpg',
    categories: ['patterned', 'pet_friendly'],
    baseConfidence: 0.68,
    care: {
      waterIntervalDays: 4,
      light: { de: 'Halbschatten', en: 'Partial shade', es: 'Sombra parcial' },
      temp: '18-25C',
    },
  },
  {
    botanicalName: 'Chlorophytum comosum',
    names: { de: 'Gruenlilie', en: 'Spider Plant', es: 'Cinta' },
    descriptions: {
      de: 'Unkomplizierte Zimmerpflanze mit langen gebogenen Blaettern. Vermehrt sich schnell.',
      en: 'Easy houseplant with long arched leaves. Propagates quickly.',
      es: 'Planta sencilla con hojas largas arqueadas. Se multiplica rapido.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Hierbabuena_0611_Revised.jpg/500px-Hierbabuena_0611_Revised.jpg',
    categories: ['easy', 'pet_friendly', 'air_purifier'],
    baseConfidence: 0.79,
    care: {
      waterIntervalDays: 6,
      light: { de: 'Hell bis halbschattig', en: 'Bright to partial shade', es: 'Brillante a sombra parcial' },
      temp: '16-24C',
    },
  },
  {
    botanicalName: 'Anthurium andraeanum',
    names: { de: 'Flamingoblume', en: 'Anthurium', es: 'Anturio' },
    descriptions: {
      de: 'Auffaellige Hochblaetter und lange Bluetezeit. Braucht Waerme und gleichmaessige Feuchte.',
      en: 'Known for vivid spathes and long bloom cycles. Likes warmth and even moisture.',
      es: 'Conocida por sus flores vistosas. Requiere calor y riego regular.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/AnthuriumAndraenum.jpg/500px-AnthuriumAndraenum.jpg',
    categories: ['flowering', 'high_humidity'],
    baseConfidence: 0.71,
    care: {
      waterIntervalDays: 6,
      light: { de: 'Hell ohne direkte Sonne', en: 'Bright indirect light', es: 'Luz brillante indirecta' },
      temp: '18-27C',
    },
  },
  {
    botanicalName: 'Nephrolepis exaltata',
    names: { de: 'Schwertfarn', en: 'Boston Fern', es: 'Helecho de Boston' },
    descriptions: {
      de: 'Fein gefiederter Farn. Benoetigt regelmaessige Feuchte und keine direkte Sonne.',
      en: 'Fine-textured fern. Needs regular moisture and no harsh direct sun.',
      es: 'Helecho de textura fina. Necesita humedad constante.',
    },
    imageUri: 'https://upload.wikimedia.org/wikipedia/commons/thumb/3/30/Boston_Fern_%282873392811%29.png/500px-Boston_Fern_%282873392811%29.png',
    categories: ['pet_friendly', 'air_purifier', 'high_humidity'],
    baseConfidence: 0.7,
    care: {
      waterIntervalDays: 3,
      light: { de: 'Halbschatten', en: 'Partial shade', es: 'Sombra parcial' },
      temp: '16-24C',
    },
  },
];

const hashString = (value: string): number => {
  let hash = 2166136261;
  for (let i = 0; i < value.length; i += 1) {
    hash ^= value.charCodeAt(i);
    hash = Math.imul(hash, 16777619);
  }
  return hash >>> 0;
};

const clampConfidence = (value: number): number => {
  return Number(Math.max(0.4, Math.min(0.99, value)).toFixed(2));
};

const toEntry = (
  seed: MockPlantSeed,
  lang: Language,
  confidence: number,
): BackendDatabaseEntry => {
  return {
    name: seed.names[lang],
    botanicalName: seed.botanicalName,
    description: seed.descriptions[lang],
    confidence: clampConfidence(confidence),
    careInfo: {
      waterIntervalDays: seed.care.waterIntervalDays,
      light: seed.care.light[lang],
      temp: seed.care.temp,
    },
    imageUri: seed.imageUri,
    categories: seed.categories,
  };
};

const getFullCatalog = (lang: Language): BackendDatabaseEntry[] => {
  const seeds = PLANTS.map(seed => toEntry(seed, lang, seed.baseConfidence));
  const batches = getBatchCatalog(lang);
  const catalog = [...seeds, ...batches];

  const seenBotanical = new Set<string>();
  const seenImage = new Set<string>();

  return catalog.filter(e => {
    const botanicalKey = normalizeSearchText(e.botanicalName);
    const imageKey = e.imageUri.trim();

    if (seenBotanical.has(botanicalKey) || seenImage.has(imageKey)) {
      return false;
    }

    seenBotanical.add(botanicalKey);
    seenImage.add(imageKey);
    return true;
  });
};

export const getMockCatalog = (lang: Language): BackendDatabaseEntry[] => {
  return getFullCatalog(lang);
};

export const getMockPlantByImage = (
  imageUri: string,
  lang: Language,
  preferHighConfidence: boolean,
): BackendDatabaseEntry => {
  const seeds = PLANTS;
  const indexHash = hashString(`${lang}:${imageUri}`);
  const selectedSeed = seeds[indexHash % seeds.length];

  const varianceHash = hashString(`confidence:${imageUri}:${selectedSeed.botanicalName}`);
  const variance = (varianceHash % 28) / 100; // 0.00 - 0.27
  const confidenceBase = selectedSeed.baseConfidence - 0.08 + variance;
  const confidence = preferHighConfidence ? confidenceBase + 0.09 : confidenceBase;

  return toEntry(selectedSeed, lang, confidence);
};

const getBatchCatalog = (lang: Language): BackendDatabaseEntry[] => {
  const all = [...LEXICON_BATCH_1_ENTRIES, ...LEXICON_BATCH_2_ENTRIES];
  return all.map(entry => ({
    name: entry.name,
    botanicalName: entry.botanicalName,
    description: entry.description || '',
    confidence: entry.confidence,
    careInfo: {
      waterIntervalDays: entry.careInfo.waterIntervalDays,
      light: entry.careInfo.light,
      temp: entry.careInfo.temp,
    },
    imageUri: entry.imageUri,
    categories: entry.categories,
  }));
};

export const searchMockCatalog = (
  query: string,
  lang: Language,
  limit = 12,
): BackendDatabaseEntry[] => {
  const normalizedQuery = normalizeSearchText(query);
  const deduped = getFullCatalog(lang);

  if (!normalizedQuery) return deduped.slice(0, limit);

  return rankHybridEntries(deduped, normalizedQuery, limit)
    .map((candidate) => candidate.entry);
};