/**
 * MOUNT SYSTEM
 * Handles rideable animals (Donkey, Horse, etc.)
 */
class MountSystem {
    constructor(scene, player) {
        this.scene = scene;
        this.player = player;
        this.currentMount = null;
        this.isMounted = false;

        // Mount definitions
        this.mountData = {
            'donkey': {
                name: 'Donkey',
                speed: 200, // Movement speed when mounted
                texture: 'donkey',
                inventorySlots: 10, // Extra inventory from saddlebags
                color: 0x8B7355 // Brown
            },
            'horse': {
                name: 'Horse',
                speed: 300,
                texture: 'horse',
                inventorySlots: 5,
                color: 0x654321
            }
        };
    }

    /**
     * Spawn a mount in the world
     */
    spawnMount(gridX, gridY, type) {
        if (!this.mountData[type]) {
            console.error('Unknown mount type:', type);
            return null;
        }

        const data = this.mountData[type];
        const screenPos = this.scene.iso.toScreen(gridX, gridY);

        const mount = {
            type,
            gridX,
            gridY,
            sprite: null,
            inventory: [], // Saddlebag storage
            tamed: true
        };

        // Create sprite
        mount.sprite = this.scene.add.sprite(
            screenPos.x + this.scene.terrainOffsetX,
            screenPos.y + this.scene.terrainOffsetY,
            data.texture || 'npc_zombie' // Fallback
        );
        mount.sprite.setOrigin(0.5, 1);
        mount.sprite.setScale(0.4);
        mount.sprite.setTint(data.color);
        mount.sprite.setDepth(this.scene.iso.getDepth(gridX, gridY, this.scene.iso.LAYER_OBJECTS));

        mount.sprite.setInteractive({ useHandCursor: true });
        mount.sprite.on('pointerdown', () => {
            this.mountUp(mount);
        });

        console.log(`🐴 Spawned ${data.name} at ${gridX},${gridY}`);
        return mount;
    }

    /**
     * Mount up on a donkey/horse
     */
    mountUp(mount) {
        if (this.isMounted) {
            console.log('Already mounted!');
            return;
        }

        this.currentMount = mount;
        this.isMounted = true;

        const data = this.mountData[mount.type];

        // Hide mount sprite
        mount.sprite.setVisible(false);

        // Increase player speed
        if (this.player) {
            this.player.originalSpeed = this.player.speed || 100;
            this.player.speed = data.speed;
        }

        // Visual feedback
        this.scene.events.emit('show-floating-text', {
            x: this.player.sprite.x,
            y: this.player.sprite.y - 40,
            text: `🐴 Mounted ${data.name}!`,
            color: '#ffaa00'
        });

        console.log(`🐴 Mounted on ${data.name}! Speed: ${data.speed}`);
    }

    /**
     * Dismount
     */
    dismount() {
        if (!this.isMounted || !this.currentMount) {
            return;
        }

        const mount = this.currentMount;
        const data = this.mountData[mount.type];

        // Restore player speed
        if (this.player && this.player.originalSpeed) {
            this.player.speed = this.player.originalSpeed;
        }

        // Place mount at player location
        const playerPos = this.player.getPosition();
        mount.gridX = Math.round(playerPos.x);
        mount.gridY = Math.round(playerPos.y);

        const screenPos = this.scene.iso.toScreen(mount.gridX, mount.gridY);
        mount.sprite.setPosition(
            screenPos.x + this.scene.terrainOffsetX,
            screenPos.y + this.scene.terrainOffsetY
        );
        mount.sprite.setVisible(true);

        // Visual feedback
        this.scene.events.emit('show-floating-text', {
            x: this.player.sprite.x,
            y: this.player.sprite.y - 40,
            text: `Dismounted`,
            color: '#888888'
        });

        this.currentMount = null;
        this.isMounted = false;

        console.log(`🐴 Dismounted from ${data.name}`);
    }

    /**
     * Toggle mount/dismount (E key)
     */
    toggleMount() {
        if (this.isMounted) {
            this.dismount();
        } else {
            // Try to find nearby mount
            const nearbyMount = this.findNearbyMount();
            if (nearbyMount) {
                this.mountUp(nearbyMount);
            }
        }
    }

    findNearbyMount() {
        // TODO: Search for mounts near player
        return null;
    }

    /**
     * Access saddlebag inventory
     */
    openSaddlebag() {
        if (!this.isMounted || !this.currentMount) {
            return null;
        }

        const data = this.mountData[this.currentMount.type];
        console.log(`🎒 Opening saddlebag (${data.inventorySlots} slots)`);
        return this.currentMount.inventory;
    }

    update(delta) {
        // Update mount position if mounted
        if (this.isMounted && this.currentMount && this.player) {
            const playerPos = this.player.getPosition();
            this.currentMount.gridX = Math.round(playerPos.x);
            this.currentMount.gridY = Math.round(playerPos.y);
        }
    }

    isMountedOnAnything() {
        return this.isMounted;
    }
}