/**
 * Starter Chest System
 * Generates seed-based random loot for new game
 */

class StarterChestSystem {
    constructor(scene) {
        this.scene = scene;
    }

    /**
     * Generate seed-based random loot table
     * @param {number} seed - Game seed (e.g., Date.now())
     * @returns {Array} List of items {type, amount}
     */
    generateLoot(seed = Date.now()) {
        // Simple seeded random generator (LCG)
        let rng = seed;
        const random = () => {
            rng = (rng * 9301 + 49297) % 233280;
            return rng / 233280;
        };

        const lootTable = [];

        // GUARANTEED ITEMS (always spawn)
        lootTable.push({ type: 'wheat_seed', amount: 10 + Math.floor(random() * 10) }); // 10-20 seeds
        lootTable.push({ type: 'wood', amount: 5 + Math.floor(random() * 10) }); // 5-15 wood

        // RANDOM ITEMS (50% chance each)
        if (random() > 0.5) {
            lootTable.push({ type: 'stone', amount: 3 + Math.floor(random() * 5) }); // 3-8 stone
        }
        if (random() > 0.5) {
            lootTable.push({ type: 'bone', amount: 2 + Math.floor(random() * 4) }); // 2-6 bones
        }
        if (random() > 0.7) {
            lootTable.push({ type: 'bread', amount: 1 + Math.floor(random() * 3) }); // 1-4 bread (food)
        }

        // RARE ITEMS (10% chance each)
        if (random() > 0.9) {
            lootTable.push({ type: 'iron', amount: 1 + Math.floor(random() * 2) }); // 1-3 iron
        }
        if (random() > 0.9) {
            lootTable.push({ type: 'gold_coin', amount: 10 + Math.floor(random() * 20) }); // 10-30 gold
        }

        // ULTRA RARE (1% chance)
        if (random() > 0.99) {
            lootTable.push({ type: 'diamond', amount: 1 }); // 1 diamond!
        }

        console.log('🎁 Starter Chest Loot Generated:', lootTable);
        return lootTable;
    }

    /**
     * Place starter chest at farm location
     * @param {number} x - Grid X position
     * @param {number} y - Grid Y position
     * @param {number} seed - Game seed
     */
    placeStarterChest(x, y, seed) {
        // Generate loot
        const lootItems = this.generateLoot(seed);

        // Place chest structure (if TerrainSystem supports it)
        if (this.scene.terrainSystem && this.scene.terrainSystem.placeStructure) {
            // Check if placeStructure method exists
            try {
                this.scene.terrainSystem.placeStructure(x, y, 'chest');
                console.log(`🎁 Starter Chest placed at (${x}, ${y})`);
            } catch (e) {
                console.warn('⚠️ placeStructure not available, chest not placed:', e);
            }
        }

        // Store loot data globally for later retrieval
        if (!window.gameState) window.gameState = {};
        window.gameState.starterChestLoot = lootItems;
        window.gameState.starterChestPosition = { x, y };

        return lootItems;
    }

    /**
     * Open chest and add items to player inventory
     * @param {Object} player - Player object with inventory
     */
    openChest(player) {
        if (!window.gameState || !window.gameState.starterChestLoot) {
            console.warn('⚠️ No starter chest loot found!');
            return;
        }

        const loot = window.gameState.starterChestLoot;

        // Add items to player inventory
        loot.forEach(item => {
            if (player.inventory && player.inventory.addItem) {
                player.inventory.addItem(item.type, item.amount);
                console.log(`➕ Added ${item.amount}x ${item.type} to inventory`);
            } else {
                console.warn('⚠️ Player inventory not available');
            }
        });

        // Show notification
        if (this.scene.events) {
            this.scene.events.emit('showFloatingText', {
                x: window.gameState.starterChestPosition.x,
                y: window.gameState.starterChestPosition.y,
                text: '🎁 Starter Chest Opened!',
                color: '#ffaa00'
            });
        }

        // Clear loot (chest is now empty)
        window.gameState.starterChestLoot = null;
        console.log('✅ Starter Chest opened and emptied');
    }
}

// Export for global use
if (typeof module !== 'undefined' && module.exports) {
    module.exports = StarterChestSystem;
}