/**
 * Planetary Remedies — Gemstones, Mantras, and Charity
 *
 * Recommends remedies for weak/afflicted planets based on their
 * dignity, combustion status, and house placement.
 */

// ── Types ───────────────────────────────────────────────────────────────────────

export interface GemstoneInfo {
  name: string;
  alternates: string[];
  metal: string;
  finger: string;
  day: string;
  weight: string;
}

export interface MantraInfo {
  vedic: string;
  beej: string;
  japaCount: number;
}

export interface CharityInfo {
  items: string[];
  day: string;
  deity: string;
}

export interface PlanetaryRemedy {
  planet: string;
  gemstone: GemstoneInfo;
  mantra: MantraInfo;
  charity: CharityInfo;
  color: string;
  direction: string;
  fasting: string;
}

export interface WeakPlanetRemedy {
  planet: string;
  reason: string;
  remedy: PlanetaryRemedy;
}

export interface RemedyResult {
  weakPlanets: WeakPlanetRemedy[];
  generalRemedies: string[];
}

export interface PlanetInput {
  name: string;
  dignity: string;
  isCombust: boolean;
  house: number;
}

// ── Remedy Data for All 9 Planets ───────────────────────────────────────────────

const PLANETARY_REMEDIES: Record<string, PlanetaryRemedy> = {
  Sun: {
    planet: 'Sun',
    gemstone: {
      name: 'Ruby',
      alternates: ['Red Garnet', 'Red Spinel'],
      metal: 'Gold',
      finger: 'Ring finger',
      day: 'Sunday',
      weight: '3-5 carats',
    },
    mantra: {
      vedic: 'Om Suryaya Namah',
      beej: 'Om Hraam Hreem Hraum Sah Suryaya Namah',
      japaCount: 7000,
    },
    charity: {
      items: ['Wheat', 'Jaggery', 'Red cloth'],
      day: 'Sunday',
      deity: 'Lord Sun',
    },
    color: 'Red',
    direction: 'East',
    fasting: 'Sunday',
  },

  Moon: {
    planet: 'Moon',
    gemstone: {
      name: 'Pearl',
      alternates: ['Moonstone', 'White Sapphire'],
      metal: 'Silver',
      finger: 'Little finger',
      day: 'Monday',
      weight: '4-6 carats',
    },
    mantra: {
      vedic: 'Om Chandraya Namah',
      beej: 'Om Shraam Shreem Shraum Sah Chandraya Namah',
      japaCount: 11000,
    },
    charity: {
      items: ['Rice', 'White cloth', 'Milk'],
      day: 'Monday',
      deity: 'Lord Shiva',
    },
    color: 'White',
    direction: 'Northwest',
    fasting: 'Monday',
  },

  Mars: {
    planet: 'Mars',
    gemstone: {
      name: 'Red Coral',
      alternates: ['Carnelian'],
      metal: 'Gold/Copper',
      finger: 'Ring finger',
      day: 'Tuesday',
      weight: '5-7 carats',
    },
    mantra: {
      vedic: 'Om Mangalaya Namah',
      beej: 'Om Kraam Kreem Kraum Sah Bhaumaya Namah',
      japaCount: 10000,
    },
    charity: {
      items: ['Red lentils', 'Red cloth'],
      day: 'Tuesday',
      deity: 'Lord Hanuman',
    },
    color: 'Red',
    direction: 'South',
    fasting: 'Tuesday',
  },

  Mercury: {
    planet: 'Mercury',
    gemstone: {
      name: 'Emerald',
      alternates: ['Green Tourmaline', 'Peridot'],
      metal: 'Gold',
      finger: 'Little finger',
      day: 'Wednesday',
      weight: '3-5 carats',
    },
    mantra: {
      vedic: 'Om Budhaya Namah',
      beej: 'Om Braam Breem Braum Sah Budhaya Namah',
      japaCount: 9000,
    },
    charity: {
      items: ['Green moong', 'Green cloth'],
      day: 'Wednesday',
      deity: 'Lord Vishnu',
    },
    color: 'Green',
    direction: 'North',
    fasting: 'Wednesday',
  },

  Jupiter: {
    planet: 'Jupiter',
    gemstone: {
      name: 'Yellow Sapphire',
      alternates: ['Topaz', 'Citrine'],
      metal: 'Gold',
      finger: 'Index finger',
      day: 'Thursday',
      weight: '3-5 carats',
    },
    mantra: {
      vedic: 'Om Gurave Namah',
      beej: 'Om Graam Greem Graum Sah Gurave Namah',
      japaCount: 19000,
    },
    charity: {
      items: ['Turmeric', 'Yellow cloth', 'Books'],
      day: 'Thursday',
      deity: 'Lord Brihaspati',
    },
    color: 'Yellow',
    direction: 'Northeast',
    fasting: 'Thursday',
  },

  Venus: {
    planet: 'Venus',
    gemstone: {
      name: 'Diamond',
      alternates: ['White Sapphire', 'Zircon'],
      metal: 'Silver/Platinum',
      finger: 'Middle finger',
      day: 'Friday',
      weight: '1-2 carats',
    },
    mantra: {
      vedic: 'Om Shukraya Namah',
      beej: 'Om Draam Dreem Draum Sah Shukraya Namah',
      japaCount: 16000,
    },
    charity: {
      items: ['White rice', 'White flowers', 'Silk'],
      day: 'Friday',
      deity: 'Goddess Lakshmi',
    },
    color: 'White',
    direction: 'Southeast',
    fasting: 'Friday',
  },

  Saturn: {
    planet: 'Saturn',
    gemstone: {
      name: 'Blue Sapphire',
      alternates: ['Amethyst', 'Iolite'],
      metal: 'Iron/Silver',
      finger: 'Middle finger',
      day: 'Saturday',
      weight: '3-5 carats',
    },
    mantra: {
      vedic: 'Om Shanaishcharaya Namah',
      beej: 'Om Praam Preem Praum Sah Shanaischaraya Namah',
      japaCount: 23000,
    },
    charity: {
      items: ['Black sesame', 'Iron', 'Mustard oil'],
      day: 'Saturday',
      deity: 'Lord Shani',
    },
    color: 'Black/Dark Blue',
    direction: 'West',
    fasting: 'Saturday',
  },

  Rahu: {
    planet: 'Rahu',
    gemstone: {
      name: 'Hessonite (Gomed)',
      alternates: ['Spessartite Garnet'],
      metal: 'Silver',
      finger: 'Middle finger',
      day: 'Saturday',
      weight: '4-6 carats',
    },
    mantra: {
      vedic: 'Om Rahave Namah',
      beej: 'Om Bhraam Bhreem Bhraum Sah Rahave Namah',
      japaCount: 18000,
    },
    charity: {
      items: ['Black cloth', 'Coconut'],
      day: 'Saturday',
      deity: 'Goddess Durga',
    },
    color: 'Smoky/Dark Blue',
    direction: 'Southwest',
    fasting: 'Saturday',
  },

  Ketu: {
    planet: 'Ketu',
    gemstone: {
      name: "Cat's Eye (Lehsunia)",
      alternates: ['Chrysoberyl'],
      metal: 'Silver',
      finger: 'Ring finger',
      day: 'Tuesday',
      weight: '3-5 carats',
    },
    mantra: {
      vedic: 'Om Ketave Namah',
      beej: 'Om Sraam Sreem Sraum Sah Ketave Namah',
      japaCount: 17000,
    },
    charity: {
      items: ['Blanket', 'Seven grains'],
      day: 'Tuesday',
      deity: 'Lord Ganesha',
    },
    color: 'Grey/Brown',
    direction: 'Southwest',
    fasting: 'Tuesday',
  },
};

// ── Dusthana Houses ─────────────────────────────────────────────────────────────

const DUSTHANA_HOUSES = [6, 8, 12];

// ── Affliction Detection ────────────────────────────────────────────────────────

function isDebilitated(dignity: string): boolean {
  return dignity === 'debilitated' || dignity === 'peak_debilitated';
}

function isInDusthana(house: number): boolean {
  return DUSTHANA_HOUSES.includes(house);
}

function getAfflictionReason(planet: PlanetInput): string | null {
  const reasons: string[] = [];

  if (isDebilitated(planet.dignity)) {
    reasons.push('debilitated');
  }

  if (planet.isCombust) {
    reasons.push('combust');
  }

  if (isInDusthana(planet.house)) {
    reasons.push(`placed in house ${planet.house} (dusthana)`);
  }

  return reasons.length > 0
    ? `${planet.name} is ${reasons.join(', ')}`
    : null;
}

// ── Public API ──────────────────────────────────────────────────────────────────

/**
 * Get remedies for weak/afflicted planets.
 *
 * A planet is considered weak when it is debilitated, combust, or placed
 * in a dusthana house (6, 8, 12).
 *
 * @param planets - Array of planet positions with dignity and house info
 * @returns Object with weakPlanets remedies and general recommendations
 */
export function getRemedies(planets: PlanetInput[]): RemedyResult {
  const weakPlanets: WeakPlanetRemedy[] = [];

  for (const planet of planets) {
    const reason = getAfflictionReason(planet);
    if (reason) {
      const remedy = PLANETARY_REMEDIES[planet.name];
      if (remedy) {
        weakPlanets.push({ planet: planet.name, reason, remedy });
      }
    }
  }

  // General remedies that apply to everyone
  const generalRemedies: string[] = [
    'Chant Gayatri Mantra daily for overall planetary harmony.',
    'Perform Surya Namaskar at sunrise for vitality and spiritual growth.',
    'Offer water to the Sun (Arghya) every morning facing east.',
    'Light a diya (lamp) with ghee every evening in the prayer room.',
    'Donate food to the needy on Saturdays for karmic balance.',
  ];

  // Add specific general advice based on afflictions found
  if (weakPlanets.some(wp => wp.planet === 'Saturn')) {
    generalRemedies.push('Feed crows on Saturdays to appease Saturn.');
  }
  if (weakPlanets.some(wp => wp.planet === 'Rahu')) {
    generalRemedies.push('Feed stray dogs to reduce Rahu affliction.');
  }
  if (weakPlanets.some(wp => wp.planet === 'Ketu')) {
    generalRemedies.push('Feed a multi-colored cow or donate blankets to appease Ketu.');
  }
  if (weakPlanets.some(wp => wp.planet === 'Mars')) {
    generalRemedies.push('Visit Hanuman temple on Tuesdays and offer sindoor.');
  }

  return { weakPlanets, generalRemedies };
}

/**
 * Get remedy data for a specific planet (regardless of affliction).
 * Useful for general reference.
 */
export function getPlanetRemedy(planet: string): PlanetaryRemedy | null {
  return PLANETARY_REMEDIES[planet] ?? null;
}