/**
 * BLUEPRINT SYSTEM
 * Manages unlocking crafting recipes via Blueprint items.
 */
class BlueprintSystem {
    constructor(scene) {
        this.scene = scene;
        this.unlockedRecipes = new Set(); // Stores IDs of unlocked recipes

        // Default unlocked recipes (Basic tools & structures)
        this.unlockedRecipes.add('stick');
        this.unlockedRecipes.add('plank');
        this.unlockedRecipes.add('chest');
        this.unlockedRecipes.add('fence');

        // Blueprint Definitions (Item ID -> Recipe ID)
        this.blueprints = {
            'blueprint_furnace': 'furnace',
            'blueprint_anvil': 'anvil',
            'blueprint_scooter_part': 'scooter_engine', // Example special part
            'blueprint_grave': 'gravestone'
        };
    }

    /**
     * Unlock a recipe
     */
    unlockRecipe(recipeId) {
        if (this.unlockedRecipes.has(recipeId)) {
            console.log(`ℹ️ Recipe ${recipeId} already unlocked.`);
            return false;
        }

        this.unlockedRecipes.add(recipeId);
        console.log(`📜 UNLOCKED RECIPE: ${recipeId}`);

        // Notification
        this.scene.events.emit('show-floating-text', {
            x: this.scene.player.sprite.x,
            y: this.scene.player.sprite.y - 100,
            text: `NEW RECIPE: ${recipeId.toUpperCase()}!`,
            color: '#00FFFF'
        });

        if (this.scene.soundManager) this.scene.soundManager.playSuccess();
        return true;
    }

    /**
     * Check if unlocked
     */
    isUnlocked(recipeId) {
        return this.unlockedRecipes.has(recipeId);
    }

    /**
     * Use a blueprint item from inventory
     */
    useBlueprint(itemId) {
        const recipeId = this.blueprints[itemId];
        if (!recipeId) return false;

        const success = this.unlockRecipe(recipeId);
        if (success) {
            // Consume item
            this.scene.inventorySystem.removeItem(itemId, 1);
            return true;
        }
        return false;
    }

    /**
     * Try to get a blueprint drop from mining/killing
     * @param {string} source 'mining', 'combat', 'chest'
     */
    tryDropBlueprint(x, y, source) {
        let chance = 0.05; // 5% base chance
        if (source === 'boss') chance = 1.0;
        if (source === 'chest') chance = 0.3;

        if (Math.random() < chance) {
            // Select random locked blueprint
            const allBlueprints = Object.keys(this.blueprints);
            const dropItem = allBlueprints[Math.floor(Math.random() * allBlueprints.length)];

            // Check if user already has it unlocked? Maybe drop anyway for trading?
            // For now, simple drop.

            if (this.scene.interactionSystem) {
                this.scene.interactionSystem.spawnLoot(x, y, dropItem, 1);
                console.log(`📜 Dropped Blueprint: ${dropItem}`);
            }
        }
    }
}