/**
 * BreedingSystem.js
 * =================
 * Manages animal breeding, family trees, and baby growth
 * 
 * Features:
 * - Breeding compatibility checks (species, gender, age)
 * - Baby creation with inherited traits
 * - Growth stages: baby → young → adult
 * - Family tree tracking
 * - Breeding cooldowns
 * - Animal happiness/relationship system
 * 
 * Uses: farm_animals_family_grid_1766099078030.tsx
 *       children_5_growth_stages_1766097043062.tsx
 * 
 * @author NovaFarma Team
 * @date 2025-12-22
 */

export default class BreedingSystem {
    constructor(scene) {
        this.scene = scene;

        // Animal registry
        this.animals = new Map(); // id -> animal data
        this.families = new Map(); // family id -> family tree

        // Breeding pairs currently in progress
        this.breedingPairs = new Map();

        // Timing constants (in milliseconds)
        this.BREEDING_COOLDOWN = 7 * 24 * 60 * 60 * 1000; // 7 days
        this.BABY_TO_YOUNG_TIME = 2 * 24 * 60 * 60 * 1000; // 2 days
        this.YOUNG_TO_ADULT_TIME = 5 * 24 * 60 * 60 * 1000; // 5 days

        // Debug mode: faster times for testing
        if (this.scene.registry.get('debugMode')) {
            this.BREEDING_COOLDOWN = 30000; // 30 seconds
            this.BABY_TO_YOUNG_TIME = 10000; // 10 seconds
            this.YOUNG_TO_ADULT_TIME = 20000; // 20 seconds
        }

        // Species data
        this.speciesData = this.defineSpecies();

        // Growth sprites
        this.growthSprites = this.defineGrowthSprites();

        console.log('🐄 BreedingSystem initialized');
    }

    defineSpecies() {
        return {
            cow: {
                name: 'Cow',
                basePrice: 500,
                products: ['milk', 'cheese'],
                gestationTime: 3.5 * 24 * 60 * 60 * 1000, // 3.5 days
                breedingCooldown: 7 * 24 * 60 * 60 * 1000,
                lifespan: 100 * 24 * 60 * 60 * 1000, // 100 days
                sprites: {
                    male_baby: 'cow_male_baby',
                    male_young: 'cow_male_young',
                    male_adult: 'cow_male_adult',
                    female_baby: 'cow_female_baby',
                    female_young: 'cow_female_young',
                    female_adult: 'cow_female_adult'
                }
            },
            chicken: {
                name: 'Chicken',
                basePrice: 100,
                products: ['egg', 'feather'],
                gestationTime: 21 * 60 * 60 * 1000, // 21 hours
                breedingCooldown: 3 * 24 * 60 * 60 * 1000, // 3 days
                lifespan: 50 * 24 * 60 * 60 * 1000,
                sprites: {
                    male_baby: 'chicken_male_baby',
                    male_young: 'chicken_male_young',
                    male_adult: 'chicken_rooster_adult',
                    female_baby: 'chicken_female_baby',
                    female_young: 'chicken_female_young',
                    female_adult: 'chicken_hen_adult'
                }
            },
            pig: {
                name: 'Pig',
                basePrice: 300,
                products: ['truffle'],
                gestationTime: 3 * 24 * 60 * 60 * 1000,
                breedingCooldown: 5 * 24 * 60 * 60 * 1000,
                lifespan: 80 * 24 * 60 * 60 * 1000,
                sprites: {
                    male_baby: 'pig_male_baby',
                    male_young: 'pig_male_young',
                    male_adult: 'pig_male_adult',
                    female_baby: 'pig_female_baby',
                    female_young: 'pig_female_young',
                    female_adult: 'pig_female_adult'
                }
            },
            sheep: {
                name: 'Sheep',
                basePrice: 400,
                products: ['wool', 'milk'],
                gestationTime: 4 * 24 * 60 * 60 * 1000,
                breedingCooldown: 6 * 24 * 60 * 60 * 1000,
                lifespan: 90 * 24 * 60 * 60 * 1000,
                sprites: {
                    male_baby: 'sheep_male_baby',
                    male_young: 'sheep_male_young',
                    male_adult: 'sheep_ram_adult',
                    female_baby: 'sheep_female_baby',
                    female_young: 'sheep_female_young',
                    female_adult: 'sheep_ewe_adult'
                }
            }
        };
    }

    defineGrowthSprites() {
        return {
            baby: 0,    // Frame index
            young: 1,
            adult: 2
        };
    }

    // ===== ANIMAL REGISTRATION =====

    registerAnimal(animalData) {
        const id = animalData.id || this.generateId();

        const animal = {
            id,
            species: animalData.species,
            gender: animalData.gender || this.randomGender(),
            age: animalData.age || 'adult',
            name: animalData.name || this.generateName(animalData.species, animalData.gender),
            birthDate: animalData.birthDate || Date.now(),
            parents: animalData.parents || null, // [parentId1, parentId2]
            children: animalData.children || [],
            sprite: animalData.sprite || null,
            happiness: animalData.happiness || 100,
            lastBred: animalData.lastBred || null,
            x: animalData.x || 0,
            y: animalData.y || 0
        };

        this.animals.set(id, animal);

        // Create sprite if needed
        if (!animal.sprite && animalData.x && animalData.y) {
            animal.sprite = this.createAnimalSprite(animal);
        }

        // Setup growth timer if not adult
        if (animal.age !== 'adult') {
            this.setupGrowthTimer(animal);
        }

        console.log(`🐾 Registered ${animal.species} (${animal.gender}) - ${animal.name}`);
        return animal;
    }

    createAnimalSprite(animal) {
        const speciesData = this.speciesData[animal.species];
        const spriteKey = `${animal.species}_${animal.gender}_${animal.age}`;

        const sprite = this.scene.add.sprite(
            animal.x,
            animal.y,
            'farm_animals_family_grid', // tileset name
            this.getAnimalFrame(animal.species, animal.gender, animal.age)
        );

        sprite.setData('animalId', animal.id);
        sprite.setInteractive();

        // Click to view animal details
        sprite.on('pointerdown', () => {
            this.scene.events.emit('animalClicked', animal);
        });

        return sprite;
    }

    getAnimalFrame(species, gender, age) {
        // Map to sprite sheet frames
        // This depends on your actual sprite sheet layout
        const frameMap = {
            cow: { male: { baby: 0, young: 1, adult: 2 }, female: { baby: 3, young: 4, adult: 5 } },
            chicken: { male: { baby: 6, young: 7, adult: 8 }, female: { baby: 9, young: 10, adult: 11 } },
            pig: { male: { baby: 12, young: 13, adult: 14 }, female: { baby: 15, young: 16, adult: 17 } },
            sheep: { male: { baby: 18, young: 19, adult: 20 }, female: { baby: 21, young: 22, adult: 23 } }
        };

        return frameMap[species]?.[gender]?.[age] || 0;
    }

    // ===== BREEDING MECHANICS =====

    canBreed(animalId1, animalId2) {
        const animal1 = this.animals.get(animalId1);
        const animal2 = this.animals.get(animalId2);

        if (!animal1 || !animal2) {
            return { canBreed: false, reason: 'Animal not found' };
        }

        // Must be same species
        if (animal1.species !== animal2.species) {
            return { canBreed: false, reason: 'Different species cannot breed' };
        }

        // Must be opposite genders
        if (animal1.gender === animal2.gender) {
            return { canBreed: false, reason: 'Same gender cannot breed' };
        }

        // Both must be adults
        if (animal1.age !== 'adult' || animal2.age !== 'adult') {
            return { canBreed: false, reason: 'Both must be adults' };
        }

        // Check happiness (must be >50 to breed)
        if (animal1.happiness < 50 || animal2.happiness < 50) {
            return { canBreed: false, reason: 'Animals must be happy (>50 happiness)' };
        }

        // Check breeding cooldown
        const now = Date.now();
        if (animal1.lastBred && (now - animal1.lastBred) < this.BREEDING_COOLDOWN) {
            const waitTime = Math.ceil((this.BREEDING_COOLDOWN - (now - animal1.lastBred)) / 1000 / 60);
            return { canBreed: false, reason: `${animal1.name} needs ${waitTime} more minutes` };
        }

        if (animal2.lastBred && (now - animal2.lastBred) < this.BREEDING_COOLDOWN) {
            const waitTime = Math.ceil((this.BREEDING_COOLDOWN - (now - animal2.lastBred)) / 1000 / 60);
            return { canBreed: false, reason: `${animal2.name} needs ${waitTime} more minutes` };
        }

        // Check barn capacity
        if (this.scene.progressionSystem) {
            const barnBenefits = this.scene.progressionSystem.getCurrentBenefits('barn');
            const currentAnimals = this.animals.size;
            if (currentAnimals >= barnBenefits.capacity) {
                return { canBreed: false, reason: 'Barn is full - upgrade needed!' };
            }
        }

        return { canBreed: true };
    }

    breed(animalId1, animalId2) {
        const check = this.canBreed(animalId1, animalId2);
        if (!check.canBreed) {
            this.scene.uiSystem?.showError(check.reason);
            console.warn('Cannot breed:', check.reason);
            return null;
        }

        const parent1 = this.animals.get(animalId1);
        const parent2 = this.animals.get(animalId2);

        // Determine which is female (for gestation)
        const female = parent1.gender === 'female' ? parent1 : parent2;
        const male = parent1.gender === 'male' ? parent1 : parent2;

        // Get gestation time
        const speciesData = this.speciesData[parent1.species];
        const gestationTime = speciesData.gestationTime;

        // Start gestation period
        this.scene.time.delayedCall(gestationTime, () => {
            this.giveBirth(female, male);
        });

        // Update breeding timestamps
        parent1.lastBred = Date.now();
        parent2.lastBred = Date.now();

        // Show notification
        this.scene.uiSystem?.showNotification({
            title: '💕 Breeding Started!',
            message: `${male.name} and ${female.name} are breeding...`,
            icon: parent1.species,
            duration: 3000
        });

        // Add to breeding pairs
        this.breedingPairs.set(`${animalId1}_${animalId2}`, {
            parent1: animalId1,
            parent2: animalId2,
            startTime: Date.now(),
            endTime: Date.now() + gestationTime
        });

        console.log(`💕 ${male.name} (♂) + ${female.name} (♀) breeding...`);
        return true;
    }

    giveBirth(mother, father) {
        // Create baby
        const baby = this.createBaby(mother, father);

        // Update parent records
        mother.children.push(baby.id);
        father.children.push(baby.id);

        // Show notification
        this.scene.uiSystem?.showNotification({
            title: '🎉 Baby Born!',
            message: `${mother.name} gave birth to ${baby.name}!`,
            icon: baby.species,
            duration: 5000,
            color: '#FFD700'
        });

        // Create family tree if doesn't exist
        const familyId = mother.parents?.[0] || mother.id;
        if (!this.families.has(familyId)) {
            this.families.set(familyId, {
                id: familyId,
                founder: mother,
                members: []
            });
        }
        this.families.get(familyId).members.push(baby.id);

        // Emit event
        this.scene.events.emit('babyBorn', { mother, father, baby });

        // Play birth animation/particles
        if (this.scene.particleSystem) {
            this.scene.particleSystem.createBirthEffect(mother.sprite.x, mother.sprite.y);
        }

        console.log(`🍼 Baby born: ${baby.name} (${baby.species})`);
        return baby;
    }

    createBaby(parent1, parent2) {
        const baby = {
            id: this.generateId(),
            species: parent1.species,
            age: 'baby',
            gender: this.randomGender(),
            parents: [parent1.id, parent2.id],
            children: [],
            birthDate: Date.now(),
            happiness: 100,
            lastBred: null,
            // Spawn near mother
            x: parent1.x + Phaser.Math.Between(-20, 20),
            y: parent1.y + Phaser.Math.Between(-20, 20),
            sprite: null
        };

        // Generate name
        baby.name = this.generateName(baby.species, baby.gender);

        // Create sprite
        baby.sprite = this.createAnimalSprite(baby);

        // Register animal
        this.animals.set(baby.id, baby);

        // Setup growth timer
        this.setupGrowthTimer(baby);

        return baby;
    }

    setupGrowthTimer(animal) {
        if (animal.age === 'baby') {
            // Baby → Young
            this.scene.time.delayedCall(this.BABY_TO_YOUNG_TIME, () => {
                this.growAnimal(animal, 'young');
            });
        } else if (animal.age === 'young') {
            // Young → Adult
            this.scene.time.delayedCall(this.YOUNG_TO_ADULT_TIME, () => {
                this.growAnimal(animal, 'adult');
            });
        }
    }

    growAnimal(animal, newAge) {
        const oldAge = animal.age;
        animal.age = newAge;

        // Update sprite
        if (animal.sprite) {
            const newFrame = this.getAnimalFrame(animal.species, animal.gender, newAge);
            animal.sprite.setFrame(newFrame);

            // Play growth animation
            this.scene.tweens.add({
                targets: animal.sprite,
                scale: { from: 0.8, to: 1.0 },
                duration: 500,
                ease: 'Back.easeOut'
            });
        }

        // Show notification
        this.scene.uiSystem?.showNotification({
            title: `${animal.name} Grew Up!`,
            message: `${oldAge} → ${newAge}`,
            icon: animal.species,
            duration: 3000
        });

        // If became adult, can now breed
        if (newAge === 'adult') {
            this.scene.events.emit('animalBecameAdult', animal);
        }

        // Continue growth timer if not yet adult
        if (newAge !== 'adult') {
            this.setupGrowthTimer(animal);
        }

        console.log(`📅 ${animal.name} grew from ${oldAge} to ${newAge}`);
    }

    // ===== HELPER FUNCTIONS =====

    generateId() {
        return `animal_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
    }

    randomGender() {
        return Math.random() > 0.5 ? 'male' : 'female';
    }

    generateName(species, gender) {
        const names = {
            cow: {
                male: ['Toro', 'Bruno', 'Max', 'Duke'],
                female: ['Daisy', 'Bessie', 'Bella', 'Rosie']
            },
            chicken: {
                male: ['Rocky', 'Cluck', 'Red', 'Rex'],
                female: ['Penny', 'Clucky', 'Henrietta', 'Ginger']
            },
            pig: {
                male: ['Porky', 'Hamlet', 'Bacon', 'Wilbur'],
                female: ['Petunia', 'Piglet', 'Penelope', 'Truffle']
            },
            sheep: {
                male: ['Woolly', 'Ram', 'Cloud', 'Fluff'],
                female: ['Fluffy', 'Snowball', 'Cotton', 'Lamb']
            }
        };

        const nameList = names[species]?.[gender] || ['Animal'];
        return nameList[Math.floor(Math.random() * nameList.length)];
    }

    // ===== GETTERS =====

    getAnimal(animalId) {
        return this.animals.get(animalId);
    }

    getAllAnimals() {
        return Array.from(this.animals.values());
    }

    getAnimalsBySpecies(species) {
        return this.getAllAnimals().filter(a => a.species === species);
    }

    getAnimalsByGender(gender) {
        return this.getAllAnimals().filter(a => a.gender === gender);
    }

    getAdults() {
        return this.getAllAnimals().filter(a => a.age === 'adult');
    }

    getBabies() {
        return this.getAllAnimals().filter(a => a.age === 'baby');
    }

    getBreedablePairs() {
        const adults = this.getAdults();
        const pairs = [];

        for (let i = 0; i < adults.length; i++) {
            for (let j = i + 1; j < adults.length; j++) {
                const check = this.canBreed(adults[i].id, adults[j].id);
                if (check.canBreed) {
                    pairs.push([adults[i], adults[j]]);
                }
            }
        }

        return pairs;
    }

    getFamilyTree(animalId) {
        const animal = this.animals.get(animalId);
        if (!animal) return null;

        return {
            animal,
            parents: animal.parents ? animal.parents.map(id => this.animals.get(id)) : [],
            children: animal.children.map(id => this.animals.get(id)),
            grandparents: this.getGrandparents(animal),
            siblings: this.getSiblings(animal)
        };
    }

    getGrandparents(animal) {
        if (!animal.parents) return [];

        const grandparents = [];
        for (const parentId of animal.parents) {
            const parent = this.animals.get(parentId);
            if (parent && parent.parents) {
                grandparents.push(...parent.parents.map(id => this.animals.get(id)));
            }
        }
        return grandparents.filter(Boolean);
    }

    getSiblings(animal) {
        if (!animal.parents) return [];

        const siblings = [];
        for (const parentId of animal.parents) {
            const parent = this.animals.get(parentId);
            if (parent && parent.children) {
                siblings.push(...parent.children
                    .filter(id => id !== animal.id)
                    .map(id => this.animals.get(id))
                );
            }
        }
        return [...new Set(siblings)]; // Remove duplicates
    }

    // ===== UPDATE =====

    update(time, delta) {
        // Update breeding pairs progress
        for (const [pairId, pair] of this.breedingPairs.entries()) {
            if (Date.now() >= pair.endTime) {
                this.breedingPairs.delete(pairId);
            }
        }
    }

    // ===== CLEANUP =====

    destroy() {
        this.animals.clear();
        this.families.clear();
        this.breedingPairs.clear();
    }
}