/**
 * ZOMBIE WORKER AI SYSTEM
 * Tamed zombies lahko opravljajo delo (farming, mining)
 */
class ZombieWorkerSystem {
    constructor(scene) {
        this.scene = scene;
        this.workers = [];
    }

    assignWork(zombie, workType, workRadius = 5) {
        if (!zombie.isTamed) {
            console.warn('⚠️ Cannot assign work to untamed zombie!');
            return false;
        }

        zombie.workerData = {
            type: workType,
            radius: workRadius,
            centerX: zombie.gridX,
            centerY: zombie.gridY,
            energy: 100,
            decayRate: 0.5,
            workTimer: 0,
            workInterval: 5000,
            status: 'IDLE',
            inventory: {
                seeds: 0,
                hoe: 0,
                watering_can: 0,
                pickaxe: 0
            }
        };

        this.workers.push(zombie);
        console.log(`🧟 Assigned ${zombie.type} as ${workType} worker`);
        return true;
    }

    removeWorker(zombie) {
        const index = this.workers.indexOf(zombie);
        if (index > -1) {
            this.workers.splice(index, 1);
            zombie.workerData = null;
        }
    }

    update(delta) {
        this.workers = this.workers.filter(w =>
            this.scene.npcs.includes(w) && w.hp > 0
        );

        for (const worker of this.workers) {
            if (!worker.workerData) continue;

            this.applyDecay(worker, delta);
            worker.workerData.workTimer += delta;

            if (worker.workerData.workTimer >= worker.workerData.workInterval) {
                worker.workerData.workTimer = 0;

                if (worker.workerData.type === 'FARM') {
                    this.performFarmWork(worker);
                } else if (worker.workerData.type === 'MINE') {
                    this.performMineWork(worker);
                }
            }
        }
    }

    applyDecay(zombie, delta) {
        const wd = zombie.workerData;
        wd.energy -= (wd.decayRate * delta) / 1000;

        if (wd.energy <= 0) {
            wd.energy = 0;
            zombie.hp -= (wd.decayRate * delta) / 1000;
            if (zombie.sprite) zombie.sprite.setTint(0x666666);
        }

        if (zombie.hp <= 0) this.onWorkerDeath(zombie);
    }

    performFarmWork(zombie) {
        const wd = zombie.workerData;
        const terrain = this.scene.terrainSystem;
        const farming = this.scene.farmingSystem;
        if (!terrain || !farming) return;

        // 1. Water/Harvest existing crops
        if (terrain.cropsMap) {
            for (let dx = -wd.radius; dx <= wd.radius; dx++) {
                for (let dy = -wd.radius; dy <= wd.radius; dy++) {
                    const key = `${wd.centerX + dx},${wd.centerY + dy}`;
                    if (terrain.cropsMap.has(key)) {
                        const crop = terrain.cropsMap.get(key);

                        if (!crop.isWatered) {
                            farming.waterCrop(wd.centerX + dx, wd.centerY + dy);
                            console.log(`🧟💧 Worker watered`);
                            wd.status = 'WORKING';
                            return;
                        }

                        if (crop.stage >= 4) {
                            farming.harvest(wd.centerX + dx, wd.centerY + dy);
                            console.log(`🧟🌾 Worker harvested`);
                            wd.status = 'WORKING';
                            return;
                        }
                    }
                }
            }
        }

        // 2. Plant on empty tilled soil (if has seeds)
        if (wd.inventory.seeds > 0) {
            for (let dx = -wd.radius; dx <= wd.radius; dx++) {
                for (let dy = -wd.radius; dy <= wd.radius; dy++) {
                    const tile = terrain.getTile(wd.centerX + dx, wd.centerY + dy);
                    if (tile && tile.isTilled && !tile.hasCrop) {
                        farming.plant(wd.centerX + dx, wd.centerY + dy, 'wheat');
                        wd.inventory.seeds--;
                        console.log(`🧟🌱 Worker planted (Seeds: ${wd.inventory.seeds})`);
                        wd.status = 'WORKING';
                        return;
                    }
                }
            }
        }

        // 3. Till grass/dirt
        for (let dx = -wd.radius; dx <= wd.radius; dx++) {
            for (let dy = -wd.radius; dy <= wd.radius; dy++) {
                const tile = terrain.getTile(wd.centerX + dx, wd.centerY + dy);
                const typeName = tile?.type?.name || tile?.type;

                if ((typeName === 'grass' || typeName === 'dirt') && !tile.isTilled) {
                    tile.isTilled = true;
                    if (tile.sprite) tile.sprite.setTint(0x8B4513);
                    console.log(`🧟🔨 Worker tilled soil`);
                    wd.status = 'WORKING';
                    return;
                }
            }
        }

        wd.status = 'IDLE';
    }

    performMineWork(zombie) {
        const wd = zombie.workerData;
        const terrain = this.scene.terrainSystem;
        if (!terrain || !terrain.decorationsMap) return;

        for (let dx = -wd.radius; dx <= wd.radius; dx++) {
            for (let dy = -wd.radius; dy <= wd.radius; dy++) {
                const key = `${wd.centerX + dx},${wd.centerY + dy}`;
                if (terrain.decorationsMap.has(key)) {
                    const decor = terrain.decorationsMap.get(key);
                    if (decor.type === 'stone' || decor.type.includes('rock')) {
                        terrain.removeDecoration(wd.centerX + dx, wd.centerY + dy);

                        if (this.scene.inventorySystem) {
                            this.scene.inventorySystem.addItem('stone', 1);
                        }

                        console.log(`🧟⛏️ Worker mined stone`);
                        wd.status = 'WORKING';
                        return;
                    }
                }
            }
        }

        wd.status = 'IDLE';
    }

    onWorkerDeath(zombie) {
        console.log(`💀 Worker died at ${zombie.gridX},${zombie.gridY}`);

        if (this.scene.interactionSystem && this.scene.interactionSystem.spawnLoot) {
            this.scene.interactionSystem.spawnLoot(zombie.gridX, zombie.gridY, 'fertilizer', 1);
        }

        if (this.scene.statsSystem) {
            this.scene.statsSystem.addXP(10);
        }

        this.removeWorker(zombie);
    }

    feedWorker(zombie, amount = 50) {
        if (!zombie.workerData) return false;

        zombie.workerData.energy = Math.min(100, zombie.workerData.energy + amount);
        if (zombie.sprite) zombie.sprite.clearTint();

        console.log(`🍖 Fed worker`);
        return true;
    }
}