class LootSystem {
    constructor(scene) {
        this.scene = scene;
        this.drops = []; // Active loot drops
        this.iso = scene.terrainSystem ? scene.terrainSystem.iso : null; // Reference to IsoUtils

        // Settings
        this.pickupRadius = 1.0; // Grid based
        this.magnetRadius = 3.0; // Optional: fly towards player
    }

    spawnLoot(gridX, gridY, type, count = 1) {
        if (!this.iso && this.scene.terrainSystem) this.iso = this.scene.terrainSystem.iso;
        if (!this.iso) return; // Safety check

        console.log(`🎁 Spawning ${count}x ${type} at ${gridX},${gridY}`);

        const screenPos = this.iso.toScreen(gridX, gridY);
        const x = screenPos.x + (this.scene.terrainOffsetX || 0);
        const y = screenPos.y + (this.scene.terrainOffsetY || 0);

        // Visual Symbol Mapping
        let symbol = '?';
        const symbols = {
            'wood': '🪵', 'stone': '🪨', 'seeds': '🌱', 'wheat': '🌾',
            'axe': '🪓', 'pickaxe': '⛏️', 'sword': '⚔️', 'hoe': '🚜',
            'item_bone': '🦴', 'flower': '🌸',
            'diamond': '💎', 'emerald': '💚', 'ruby': '❤️', // GEMS!
            'gold_coin': '🪙', 'iron': '⚙️'
        };
        if (symbols[type]) symbol = symbols[type];

        // Create Sprite/Text
        // Using Text for now as it supports emojis easily, but could be Sprite
        const drop = this.scene.add.text(x, y - 20, symbol, { fontSize: '20px' });
        drop.setOrigin(0.5);
        drop.setDepth(this.iso.getDepth(gridX, gridY) + 500);

        // Animation (Bobbing)
        this.scene.tweens.add({
            targets: drop,
            y: y - 40,
            duration: 600,
            yoyo: true,
            ease: 'Sine.easeInOut',
            repeat: -1
        });

        // Add to list
        this.drops.push({
            gridX, gridY,
            x, y,
            sprite: drop,
            type: type,
            count: count,
            spawnTime: Date.now()
        });
    }

    update() {
        if (!this.scene.player) return;

        const playerPos = this.scene.player.getPosition();

        // Loop backwards to allow removal
        for (let i = this.drops.length - 1; i >= 0; i--) {
            const drop = this.drops[i];

            // Distance Check
            const dist = Math.abs(drop.gridX - playerPos.x) + Math.abs(drop.gridY - playerPos.y); // Manhattan-ish

            // Pickup Logic
            if (dist < 0.8) {
                this.collectLoot(drop, i);
            }
            // Magnet Logic (Visual fly to player) - Optional
            else if (dist < 3.0) {
                // Move visual slightly towards player? 
                // Implementing full physics/velocity might be overkill for now.
            }
        }
    }

    collectLoot(drop, index) {
        if (this.scene.inventorySystem) {
            const leftover = this.scene.inventorySystem.addItem(drop.type, drop.count);

            if (leftover === 0) {
                // Success - Play Sound
                if (this.scene.soundManager) {
                    this.scene.soundManager.playPickup();
                }

                // Sparkle Effect
                if (this.scene.particleEffects) {
                    this.scene.particleEffects.sparkle(drop.x, drop.y);
                }

                // Float text effect
                this.showFloatingText(`+${drop.count} ${drop.type}`, drop.x, drop.y);

                // Remove
                drop.sprite.destroy();
                this.drops.splice(index, 1);
            } else {
                // Config full? Update count?
                drop.count = leftover;
            }
        }
    }

    showFloatingText(text, x, y) {
        const txt = this.scene.add.text(x, y - 50, text, {
            fontSize: '14px', fill: '#ffff00', stroke: '#000', strokeThickness: 2
        }).setOrigin(0.5).setDepth(20000);

        this.scene.tweens.add({
            targets: txt,
            y: y - 100,
            alpha: 0,
            duration: 800,
            onComplete: () => txt.destroy()
        });
    }
}