/**
 * MUSEUM EVOLUTION SYSTEM
 * 3-stage museum restoration with artifact collection
 * Integrates with Kustos NPC and quest system
 */

export class MuseumEvolutionSystem {
    constructor(scene) {
        this.scene = scene;

        // Museum evolution stages
        this.currentStage = 0; // 0 = ruined, 1 = partial, 2 = advanced, 3 = complete

        // Artifact collection
        this.artifacts = new Map(); // artifactId → artifactData
        this.collectedArtifacts = new Set();

        // Album tracking
        this.albumCategories = new Map();

        this.init();
    }

    init() {
        this.initializeArtifactDatabase();
        this.initializeAlbumCategories();
    }

    /**
     * Initialize all collectible artifacts
     */
    initializeArtifactDatabase() {
        const artifacts = [
            // Pre-war artifacts
            { id: 'dino_skull', name: 'Dinosaur Skull', category: 'prehistory', rarity: 'legendary', discoveryReward: 500 },
            { id: 'ancient_vase', name: 'Ancient Vase', category: 'prehistory', rarity: 'rare', discoveryReward: 100 },
            { id: 'fossil', name: 'Fossil', category: 'prehistory', rarity: 'common', discoveryReward: 50 },

            // 2084 tech artifacts            
            { id: 'ai_core', name: 'AI Core Fragment', category: '2084_tech', rarity: 'legendary', discoveryReward: 800 },
            { id: 'hologram_projector', name: 'Hologram Projector', category: '2084_tech', rarity: 'rare', discoveryReward: 150 },
            { id: 'old_smartphone', name: 'Pre-War Smartphone', category: '2084_tech', rarity: 'uncommon', discoveryReward: 80 },

            // Cultural artifacts
            { id: 'religious_icon', name: 'Religious Icon', category: 'culture', rarity: 'rare', discoveryReward: 120 },
            { id: 'painting', name: 'Old Painting', category: 'culture', rarity: 'uncommon', discoveryReward: 90 },
            { id: 'book_collection', name: 'Rare Book Collection', category: 'culture', rarity: 'rare', discoveryReward: 110 },

            // Post-apocalypse relics
            { id: 'first_cannabis_seed', name: 'First Cannabis Seed', category: 'post_apo', rarity: 'legendary', discoveryReward: 600 },
            { id: 'zombie_variant_sample', name: 'Zombie Variant Sample', category: 'post_apo', rarity: 'rare', discoveryReward: 140 },
            { id: 'survival_journal', name: "Survivor's Journal", category: 'post_apo', rarity: 'uncommon', discoveryReward: 70 }
        ];

        artifacts.forEach(artifact => {
            this.artifacts.set(artifact.id, {
                ...artifact,
                discovered: false,
                donatedToMuseum: false,
                discoveryDate: null
            });
        });
    }

    /**
     * Initialize album categories for organization
     */
    initializeAlbumCategories() {
        this.albumCategories.set('prehistory', {
            name: 'Prehistoric Era',
            description: 'Artifacts from Earth\'s ancient past',
            totalArtifacts: 3,
            collected: 0
        });

        this.albumCategories.set('2084_tech', {
            name: '2084 Technology',
            description: 'Advanced tech from before The Collapse',
            totalArtifacts: 3,
            collected: 0
        });

        this.albumCategories.set('culture', {
            name: 'Cultural Heritage',
            description: 'Art, religion, and culture of the old world',
            totalArtifacts: 3,
            collected: 0
        });

        this.albumCategories.set('post_apo', {
            name: 'Post-Apocalypse',
            description: 'Relics from the new world',
            totalArtifacts: 3,
            collected: 0
        });
    }

    /**
     * Discover artifact (player finds it)
     */
    discoverArtifact(artifactId, location) {
        const artifact = this.artifacts.get(artifactId);
        if (!artifact) return false;

        if (artifact.discovered) {
            console.warn(`Artifact ${artifactId} already discovered`);
            return false;
        }

        artifact.discovered = true;
        artifact.discoveryDate = Date.now();
        artifact.discoveryLocation = location;

        // Add to player inventory
        this.scene.inventorySystem.addItem(artifactId, 1);

        // Notification
        this.scene.uiSystem?.showNotification(
            `Artifact discovered: ${artifact.name}!`,
            'discovery',
            { rarity: artifact.rarity }
        );

        // Reward currency
        this.scene.economySystem.addCurrency(artifact.discoveryReward);

        // VFX
        this.scene.vfxSystem?.playEffect('artifact_discovery', this.scene.player.x, this.scene.player.y);

        console.log(`✨ Discovered artifact: ${artifact.name} (+${artifact.discoveryReward} coins)`);

        // Kustos dialogue trigger
        if (!artifact.donatedToMuseum) {
            this.triggerKustosDialogue(artifactId);
        }

        return true;
    }

    /**
     * Donate artifact to museum (Kustos interaction)
     */
    donateArtifact(artifactId) {
        const artifact = this.artifacts.get(artifactId);
        if (!artifact || !artifact.discovered || artifact.donatedToMuseum) return false;

        // Remove from player inventory
        if (!this.scene.inventorySystem.hasItem(artifactId, 1)) {
            console.warn('Player does not have artifact in inventory');
            return false;
        }

        this.scene.inventorySystem.removeItem(artifactId, 1);

        // Mark as donated
        artifact.donatedToMuseum = true;
        this.collectedArtifacts.add(artifactId);

        // Update category progress
        const category = this.albumCategories.get(artifact.category);
        category.collected++;

        // Kustos thanks dialogue
        this.scene.dialogueSystem?.startDialogue('kustos', 'thank_donation', { artifact: artifact.name });

        // Check for museum evolution
        this.checkEvolutionTrigger();

        // Achievement check
        this.checkCompletionAchievements();

        console.log(`📦 Donated ${artifact.name} to museum`);
        return true;
    }

    /**
     * Check if museum should evolve to next stage
     */
    checkEvolutionTrigger() {
        const totalDonated = this.collectedArtifacts.size;

        // Stage thresholds
        const stageThresholds = {
            1: 4,  // Stage 1: 4 artifacts donated
            2: 8,  // Stage 2: 8 artifacts donated
            3: 12  // Stage 3: All 12 artifacts donated
        };

        // Check for evolution
        for (let stage = 3; stage >= 1; stage--) {
            if (totalDonated >= stageThresholds[stage] && this.currentStage < stage) {
                this.evolveMuseum(stage);
                break;
            }
        }
    }

    /**
     * Evolve museum to next stage
     */
    evolveMuseum(newStage) {
        if (newStage <= this.currentStage) return;

        this.currentStage = newStage;

        // Update building visual
        this.updateMuseumVisual(newStage);

        // VFX: Building evolution
        this.scene.vfxSystem?.playEffect('museum_evolution', 1500, 600);

        // Notification
        const stageNames = {
            1: 'Partial Collection',
            2: 'Advanced Exhibition',
            3: 'World-Class Museum'
        };

        this.scene.uiSystem?.showNotification(
            `Museum evolved: ${stageNames[newStage]}!`,
            'success'
        );

        // Kustos special dialogue
        this.scene.dialogueSystem?.startDialogue('kustos', `museum_stage_${newStage}`);

        // Grant benefits
        this.grantStageBenefits(newStage);

        console.log(`🏛️ Museum evolved to Stage ${newStage}: ${stageNames[newStage]}`);
    }

    /**
     * Update museum building sprite
     */
    updateMuseumVisual(stage) {
        // Load corresponding sprite: museum_stage_1, museum_stage_2, museum_stage_3
        const sprite = this.scene.buildingSystem.getBuilding('museum');
        if (sprite) {
            sprite.setTexture(`museum_stage_${stage}`);
        }
    }

    /**
     * Grant benefits for reaching museum stage
     */
    grantStageBenefits(stage) {
        switch (stage) {
            case 1:
                // Stage 1: Basic lore access
                this.scene.gameState.unlocks.lore_system = true;
                this.scene.uiSystem?.unlockTab('lore');
                break;
            case 2:
                // Stage 2: Research bonuses
                this.scene.gameState.buffs.research_speed = 1.25; // +25% research
                break;
            case 3:
                // Stage 3: Full collection bonus
                this.scene.gameState.buffs.artifact_discovery = 2.0; // 2x artifact find rate
                this.scene.achievementSystem?.unlock('master_curator');
                break;
        }
    }

    /**
     * Trigger Kustos dialogue about found artifact
     */
    triggerKustosDialogue(artifactId) {
        const artifact = this.artifacts.get(artifactId);

        // Show notification to visit Kustos
        this.scene.uiSystem?.showNotification(
            `Kustos might be interested in the ${artifact.name}`,
            'info',
            { icon: 'museum' }
        );
    }

    /**
     * Check for collection completion achievements
     */
    checkCompletionAchievements() {
        // Check category completion
        this.albumCategories.forEach((category, categoryId) => {
            if (category.collected === category.totalArtifacts) {
                this.scene.achievementSystem?.unlock(`complete_${categoryId}_collection`);
            }
        });

        // Check total completion
        if (this.collectedArtifacts.size === this.artifacts.size) {
            this.scene.achievementSystem?.unlock('complete_museum_collection');
        }
    }

    /**
     * Get album progress
     */
    getAlbumProgress() {
        const categories = {};

        this.albumCategories.forEach((category, categoryId) => {
            categories[categoryId] = {
                ...category,
                progress: Math.round((category.collected / category.totalArtifacts) * 100)
            };
        });

        return {
            categories,
            totalArtifacts: this.artifacts.size,
            totalCollected: this.collectedArtifacts.size,
            overallProgress: Math.round((this.collectedArtifacts.size / this.artifacts.size) * 100)
        };
    }

    /**
     * Get artifacts by category for UI display
     */
    getArtifactsByCategory(categoryId) {
        return Array.from(this.artifacts.values())
            .filter(a => a.category === categoryId);
    }

    /**
     * Get museum stage info
     */
    getStageInfo() {
        const stageData = {
            0: { name: 'Ruined', description: 'Museum is destroyed' },
            1: { name: 'Partial Collection', description: '4 artifacts displayed' },
            2: { name: 'Advanced Exhibition', description: '8 artifacts displayed' },
            3: { name: 'World-Class Museum', description: 'All 12 artifacts displayed' }
        };

        return {
            currentStage: this.currentStage,
            ...stageData[this.current Stage],
            nextStageRequirement: this.currentStage < 3 ? [4, 8, 12][this.currentStage] : null,
            currentArtifacts: this.collectedArtifacts.size
        };
    }
}