class WorldEventSystem {
    constructor(scene) {
        this.scene = scene;
        this.activeEvents = [];
        this.bats = [];
        this.owl = null;
    }

    /*
     * BATS: Visual effect for evening/night
     */
    spawnBatSwarm() {
        console.log('🦇 Bat Swarm Incoming!');
        const count = 10 + Math.floor(Math.random() * 10);

        for (let i = 0; i < count; i++) {
            // Start right-side of screen, random height
            const sx = this.scene.scale.width + 50 + Math.random() * 200;
            const sy = Math.random() * (this.scene.scale.height / 2); // Top half

            const bat = this.scene.add.sprite(sx, sy, 'bat');
            bat.setDepth(2000); // Above most things
            bat.setScrollFactor(0); // Screen space (UI layer) or World space? 
            // Better world space if we want them to feel like part of the world, but screen space is easier for "effect".
            // Let's stick to Screen Space for "Ambience".

            // Random speed
            const speed = 150 + Math.random() * 100;

            this.bats.push({ sprite: bat, speed: speed });
        }
    }

    /*
     * NIGHT OWL: Delivers a gift
     */
    spawnNightOwl() {
        if (this.owl) return; // Only one at a time
        console.log('🦉 Night Owl Arriving!');

        // Spawn top-left
        const sx = -50;
        const sy = 100;

        const owl = this.scene.add.sprite(sx, sy, 'owl');
        owl.setDepth(2000);
        owl.setScrollFactor(0); // Screen space for delivery

        this.owl = {
            sprite: owl,
            state: 'ARRIVING', // ARRIVING, DELIVERING, LEAVING
            timer: 0,
            targetX: this.scene.scale.width / 2,
            targetY: this.scene.scale.height / 3
        };

        if (this.scene.soundManager) {
            // Play owl hoot sound (placeholder or generic)
            // this.scene.soundManager.playHoot(); 
        }

        this.scene.events.emit('show-floating-text', {
            x: this.scene.player.sprite.x,
            y: this.scene.player.sprite.y - 120,
            text: '🦉 Hoot Hoot!',
            color: '#FFA500'
        });
    }

    update(delta) {
        // 1. Bats
        for (let i = this.bats.length - 1; i >= 0; i--) {
            const b = this.bats[i];
            b.sprite.x -= b.speed * (delta / 1000); // Fly left
            b.sprite.y += (Math.sin(b.sprite.x * 0.02) * 2); // Wobbly flight

            if (b.sprite.x < -50) {
                b.sprite.destroy();
                this.bats.splice(i, 1);
            }
        }

        // 2. Owl
        if (this.owl) {
            const o = this.owl;
            const speed = 200 * (delta / 1000);

            if (o.state === 'ARRIVING') {
                const dx = o.targetX - o.sprite.x;
                const dy = o.targetY - o.sprite.y;
                const dist = Math.sqrt(dx * dx + dy * dy);

                if (dist < 10) {
                    o.state = 'DELIVERING';
                    o.timer = 0;
                    this.dropGift();
                } else {
                    o.sprite.x += (dx / dist) * speed;
                    o.sprite.y += (dy / dist) * speed;
                }
            } else if (o.state === 'DELIVERING') {
                o.timer += delta;
                if (o.timer > 1000) { // Hover for 1s
                    o.state = 'LEAVING';
                }
            } else if (o.state === 'LEAVING') {
                o.sprite.x += speed; // Fly right
                o.sprite.y -= speed * 0.5; // Fly up

                if (o.sprite.x > this.scene.scale.width + 50) {
                    o.sprite.destroy();
                    this.owl = null;
                }
            }
        }
    }

    dropGift() {
        console.log('🎁 Owl dropped a gift!');
        const p = this.scene.player;

        // Spawn loot at player pos (World Space)
        if (this.scene.interactionSystem) {
            // Random gift: Gold or maybe a rare item
            const r = Math.random();
            let item = 'flower_red';
            let count = 1;

            if (r < 0.3) { item = 'coin_gold'; count = 10; }
            else if (r < 0.6) { item = 'seeds_corn'; count = 5; }
            else if (r < 0.9) { item = 'item_scrap'; count = 3; }
            else { item = 'artefact_old'; count = 1; } // Rare!

            this.scene.interactionSystem.spawnLoot(p.gridX, p.gridY, item, count);
        }
    }
}