class InteractionSystem {
    constructor(scene) {
        this.scene = scene;
        this.iso = new IsometricUtils(48, 24);

        // Input listener setup
        this.scene.input.on('pointerdown', (pointer) => {
            if (pointer.button === 0) { // Left Click
                const worldX = pointer.worldX - this.scene.terrainOffsetX;
                const worldY = pointer.worldY - this.scene.terrainOffsetY;
                const gridPos = this.iso.toGrid(worldX, worldY);
                this.handleInteraction(gridPos.x, gridPos.y, false);
            }
        });

        // Key E listener (Easy Interaction/Tame)
        this.scene.input.keyboard.on('keydown-E', () => {
            this.handleInteractKey();
        });
    }

    handleInteractKey() {
        if (!this.scene.player || !this.scene.npcs) return;
        const playerPos = this.scene.player.getPosition();

        // Find nearest NPC
        let nearest = null;
        let minDist = 2.5; // Interaction range

        const candidates = this.scene.spatialGrid ? this.scene.spatialGrid.query(playerPos.x, playerPos.y) : this.scene.npcs;

        if (this.scene.vehicles) {
            for (const v of this.scene.vehicles) {
                const d = Phaser.Math.Distance.Between(playerPos.x, playerPos.y, v.gridX, v.gridY);
                if (d < minDist) {
                    minDist = d;
                    nearest = v;
                }
            }
        }

        // Check for chests
        if (this.scene.chests) {
            for (const chest of this.scene.chests) {
                const d = Phaser.Math.Distance.Between(playerPos.x, playerPos.y, chest.gridX, chest.gridY);
                if (d < minDist && !chest.isOpened) {
                    minDist = d;
                    nearest = chest;
                }
            }
        }

        for (const npc of candidates) {
            const d = Phaser.Math.Distance.Between(playerPos.x, playerPos.y, npc.gridX, npc.gridY);
            if (d < minDist) {
                minDist = d;
                nearest = npc;
            }
        }



        // Check for Buildings (Signs included)
        // Currently decorations don't store data easily accessible here without query.
        // Assuming nearest logic above covers entities.

        if (nearest) {
            console.log('E Interacted with:', nearest.type || nearest.lootTable);
            if (nearest.type === 'scooter') {
                nearest.interact(this.scene.player);
            }
            else if (nearest.lootTable) {
                nearest.interact(this.scene.player);
            }
            else if (nearest.type === 'zombie') {
                // Check if already tamed?
                // If aggressive, combat? E is usually benign interaction.
                nearest.tame();
            } else {
                // Generic Talk / Toggle
                // INTEGRATE TRANSLATION
                this.handleTalk(nearest);
            }
        }
    }

    handleTalk(npc) {
        if (!this.scene.hybridSkillSystem) {
            console.log('Talk with:', npc.type);
            return;
        }

        let text = "...";
        let color = '#FFFFFF';

        if (npc.type === 'zombie') {
            text = "Brains... Hungry... Leader?";
            text = this.scene.hybridSkillSystem.getSpeechTranslation(text);
            color = '#55FF55';
        } else if (npc.type === 'merchant') {
            text = "Welcome! I have rare goods.";
            color = '#FFD700';
            // Also triggers UI
            const uiScene = this.scene.scene.get('UIScene');
            if (uiScene) uiScene.showTradeMenu(this.scene.inventorySystem);
        } else if (npc.type === 'elf') {
            text = "The forest... it burns... you are not safe.";
            text = this.scene.hybridSkillSystem.getSpeechTranslation(text); // Maybe Elvish/Mutant dialect?
            color = '#00FFFF';
        } else if (npc.passive) {
            // Animal noises
            text = npc.type.includes('cow') ? 'Moo.' : 'Cluck.';
        }

        // Show Floating Text Dialogue
        this.scene.events.emit('show-floating-text', {
            x: npc.sprite.x,
            y: npc.sprite.y - 60,
            text: text,
            color: color
        });

        // NPC pauses briefly (handled by AI)
    }

    handleInteraction(gridX, gridY, isAttack = false) {
        if (!this.scene.player) return;

        // 3. Check distance
        const playerPos = this.scene.player.getPosition();
        const dist = Phaser.Math.Distance.Between(playerPos.x, playerPos.y, gridX, gridY);

        // Allow interaction within radius of 2.5 tiles (1.5 for attack)
        const maxDist = isAttack ? 1.5 : 2.5;
        if (dist > maxDist) return;

        // DETERMINE TOOL
        let activeTool = isAttack ? 'sword' : null;
        const uiScene = this.scene.scene.get('UIScene');
        const invSys = this.scene.inventorySystem;

        if (uiScene && invSys && !isAttack) {
            const selectedIdx = uiScene.selectedSlot;
            const slotData = invSys.slots[selectedIdx];
            if (slotData) activeTool = slotData.type;
        }

        if (isAttack && invSys) {
            const selectedIdx = uiScene.selectedSlot;
            const slotData = invSys.slots[selectedIdx];
            if (slotData) activeTool = slotData.type;
        }

        // 0. Build Mode Override (Only click)
        if (!isAttack && this.scene.buildingSystem && this.scene.buildingSystem.isBuildMode) {
            this.scene.buildingSystem.tryBuild(gridX, gridY);
            return;
        }

        // 3.3.1 BOAT DEPLOY
        if (activeTool === 'boat' && !isAttack && this.scene.oceanSystem) {
            this.scene.oceanSystem.useBoat();
            return;
        }

        // 3.4 Check for Vehicles (Scooter)
        if (!isAttack && this.scene.vehicles) {
            for (const vehicle of this.scene.vehicles) {
                // If mounted, dismount (interact with self/vehicle at same pos)
                // If unmounted, check proximity
                if (Math.abs(vehicle.gridX - gridX) < 1.5 && Math.abs(vehicle.gridY - gridY) < 1.5) {
                    if (vehicle.interact) {
                        vehicle.interact(this.scene.player);
                        return; // Stop other interactions
                    }
                }
            }
        }

        // 3.5 Check for NPC Interaction
        const candidates = this.scene.spatialGrid ? this.scene.spatialGrid.query(gridX, gridY) : this.scene.npcs;

        if (candidates) {
            for (const npc of candidates) {
                // Increased radius to 1.8 to catch moving NPCs easier
                if (Math.abs(npc.gridX - gridX) < 1.8 && Math.abs(npc.gridY - gridY) < 1.8) {

                    if (npc.type === 'merchant' && !isAttack) {
                        if (uiScene && invSys) uiScene.showTradeMenu(invSys);
                        return;
                    }

                    if (npc.type === 'zombie') {
                        // Logic: Attack vs Tame
                        const isWeapon = activeTool === 'sword' || activeTool === 'axe' || activeTool === 'pickaxe';

                        if (isAttack || isWeapon) {
                            // COMBAT
                            let damage = 1;
                            if (activeTool === 'sword') damage = 5;
                            if (activeTool === 'axe') damage = 3;
                            if (activeTool === 'pickaxe') damage = 2;

                            if (npc.takeDamage) {
                                npc.takeDamage(damage);
                            }
                            return;
                        }
                        else {
                            if (npc.isTamed) {
                                // Open Worker Menu
                                if (uiScene && uiScene.showWorkerMenu) {
                                    uiScene.showWorkerMenu(npc);
                                }
                            } else {
                                // TAME ATTEMPT
                                console.log('🤝 Attempting to TAME zombie at', npc.gridX, npc.gridY);
                                npc.tame();
                            }
                            return;
                        }
                    }

                    // 3.6 Check for Livestock Interaction (Milking)
                    if (npc.type.includes('cow') && activeTool === 'bucket' && !isAttack) {
                        if (npc.milkReady) {
                            npc.milkReady = false;
                            npc.milkCooldown = 60000; // 60s cooldown

                            const product = npc.type.includes('mutant') ? 'glowing_milk' : 'milk';

                            if (invSys) {
                                invSys.addItem(product, 1);
                                this.scene.events.emit('show-floating-text', {
                                    x: npc.sprite.x, y: npc.sprite.y - 40, text: `+1 ${product}`, color: '#FFFFFF'
                                });
                                console.log(`🥛 Milked ${npc.type}: ${product}`);

                                // Optional: Replace bucket with empty? No, bucket is tool.
                                // Maybe replace bucket with bucket_milk if it was a single use item, but let's keep it as tool.
                            }
                        } else {
                            this.scene.events.emit('show-floating-text', {
                                x: npc.sprite.x, y: npc.sprite.y - 40, text: 'Not ready...', color: '#AAAAAA'
                            });
                        }
                        return;
                    }

                    // NPC interaction complete
                    return;
                }
            }
        }

        // 3.5 Try Opening Chest
        if (!isAttack && this.scene.terrainSystem) {
            const decorKey = `${gridX},${gridY}`;
            const decor = this.scene.terrainSystem.decorationsMap.get(decorKey);

            if (decor && decor.type === 'chest') {
                // Open chest and spawn loot!
                console.log('📦 Opening treasure chest!');

                // Random loot
                const lootTable = ['item_scrap', 'item_chip', 'item_wood', 'item_stone', 'item_bone'];
                const lootCount = Phaser.Math.Between(2, 4);

                for (let i = 0; i < lootCount; i++) {
                    const randomLoot = Phaser.Utils.Array.GetRandom(lootTable);
                    if (this.scene.lootSystem) {
                        const offsetX = Phaser.Math.Between(-1, 1);
                        const offsetY = Phaser.Math.Between(-1, 1);
                        this.scene.lootSystem.spawnLoot(gridX + offsetX, gridY + offsetY, randomLoot);
                    }
                }

                // Remove chest
                this.scene.terrainSystem.removeDecoration(gridX, gridY);
                return;
            }
        }

        // 4. Try Planting Tree (Manual Planting)
        if (!isAttack && (activeTool === 'tree_sapling' || activeTool === 'item_sapling')) {
            const tile = this.scene.terrainSystem.getTile(gridX, gridY);

            // Dovolimo sajenje samo na travo in dirt
            if (tile && !tile.hasDecoration && !tile.hasCrop && (tile.type.includes('grass') || tile.type.includes('dirt'))) {
                const saplingSprite = window.SPRITE_TREE_SAPLING || 'tree_sapling';
                this.scene.terrainSystem.addDecoration(gridX, gridY, saplingSprite);

                // Remove 1 sapling from hand
                if (this.scene.inventorySystem) {
                    this.scene.inventorySystem.removeItem(activeTool, 1);
                }

                // Sound
                // this.scene.soundManager.playPlant(); 
                return;
            }
        }

        // 4. Farming is now handled via Player Space key (handleFarmingAction)
        // No click farming anymore


        // 5. Try damage decoration
        const id = `${gridX},${gridY}`;
        if (this.scene.terrainSystem && this.scene.terrainSystem.decorationsMap.has(id)) {
            const decor = this.scene.terrainSystem.decorationsMap.get(id);

            // Workstation Interaction
            if (this.scene.workstationSystem && (decor.type.includes('furnace') || decor.type.includes('mint'))) {
                const heldItem = activeTool ? { itemId: activeTool } : null;
                const result = this.scene.workstationSystem.interact(gridX, gridY, heldItem);
                if (result) return;
            }

            // Building Interaction (Upgrade House)
            if (this.scene.buildingSystem && decor.type.startsWith('struct_house')) {
                const result = this.scene.buildingSystem.tryUpgrade(gridX, gridY);
                if (result) return;
            }

            // handleTreeHit Logic (User Request)
            // Preverimo tip in ustrezno orodje
            let damage = 1;

            // DREVESA (sapling, healthy, dead, blue)
            if (decor.type.includes('tree') || decor.type.includes('sapling')) {
                damage = (activeTool === 'axe') ? 5 : 1; // Povečal damage z sekiro
            }
            // KAMNI (rock, stone)
            else if (decor.type.includes('rock') || decor.type.includes('stone')) {
                damage = (activeTool === 'pickaxe') ? 5 : 1;
            }
            else if (decor.type.includes('bush')) damage = 5;

            // Apply damage
            decor.hp -= damage;
            this.showFloatingText(`-${damage}`, gridX, gridY, '#ffaaaa');

            // Sound
            if (this.scene.soundManager) {
                if (decor.type.includes('tree')) this.scene.soundManager.playChop();
                else this.scene.soundManager.playHit(); // Generic hit for rocks
            }

            if (decor.hp <= 0) {
                // XP REWARD (Requested by Logic)
                if (this.scene.statsSystem) {
                    this.scene.statsSystem.addXP(5);
                }

                const prevType = decor.type;

                // Logic: If Tree (and not sapling), turn into Sapling immediately (Regrowth)
                if ((prevType.includes('tree') || prevType.includes('final')) && !prevType.includes('sapling')) {

                    decor.type = window.SPRITE_TREE_SAPLING || 'tree_sapling';
                    decor.hp = 2; // Fragile sapling
                    decor.scale = 1.0;

                    // Update visual immediately
                    const sprite = this.scene.terrainSystem.visibleDecorations.get(id);
                    if (sprite) {
                        sprite.setTexture(decor.type);
                        sprite.setScale(decor.scale);
                        // Shrink effect to simulate falling/replacement
                        this.scene.tweens.add({
                            targets: sprite, scaleX: { from: 1.2, to: 1.0 }, scaleY: { from: 1.2, to: 1.0 }, duration: 200
                        });
                    }

                    // Drop Wood Only
                    if (this.scene.lootSystem) {
                        this.scene.lootSystem.spawnLoot(gridX, gridY, 'item_wood', Math.floor(Math.random() * 3) + 2);
                    }
                    console.log('🌱 Tree replanted automatically.');
                }
                else {
                    const type = this.scene.terrainSystem.removeDecoration(gridX, gridY);

                    // Loot logic handled here via LootSystem
                    if (this.scene.lootSystem) {
                        if (type.includes('rock') || type.includes('stone')) {
                            this.scene.lootSystem.spawnLoot(gridX, gridY, 'item_stone', Math.floor(Math.random() * 3) + 1);
                        }
                        else if (type.includes('bush') || type.includes('sapling')) {
                            this.scene.lootSystem.spawnLoot(gridX, gridY, 'item_seeds', 1);
                            if (type.includes('sapling')) {
                                this.scene.lootSystem.spawnLoot(gridX, gridY, window.SPRITE_TREE_SAPLING || 'tree_sapling', 1);
                            }
                        }
                        else if (type.includes('flowers')) {
                            this.scene.lootSystem.spawnLoot(gridX, gridY, 'item_seeds', 1);
                        }
                    }
                }

            } else {
                // Shake visual
                const sprite = this.scene.terrainSystem.visibleDecorations.get(id);
                if (sprite) {
                    this.scene.tweens.add({
                        targets: sprite,
                        x: sprite.x + 2, yoyo: true, duration: 50, repeat: 2
                    });
                    sprite.setTint(0xffaaaa);
                    this.scene.time.delayedCall(200, () => sprite.clearTint());
                }
            }
        }
    }

    showFloatingText(text, gridX, gridY, color) {
        const screenPos = this.iso.toScreen(gridX, gridY);
        const txt = this.scene.add.text(
            screenPos.x + this.scene.terrainOffsetX,
            screenPos.y + this.scene.terrainOffsetY - 30,
            text,
            { fontSize: '14px', fill: color, stroke: '#000', strokeThickness: 2 }
        ).setOrigin(0.5);
        this.scene.tweens.add({ targets: txt, y: txt.y - 40, alpha: 0, duration: 1000, onComplete: () => txt.destroy() });
    }

    update(delta) {
        // No logic needed here anymore (loot pickup handled by LootSystem)
    }

    spawnLoot(gridX, gridY, itemType, count = 1) {
        // Add items directly to inventory instead of spawning physical loot
        if (this.scene.inventorySystem) {
            const added = this.scene.inventorySystem.addItem(itemType, count);
            if (added) {
                // Visual feedback
                this.scene.events.emit('show-floating-text', {
                    x: gridX * 48,
                    y: gridY * 48,
                    text: `+${count} ${itemType}`,
                    color: '#00FF00'
                });
                console.log(`📦 Spawned ${count}x ${itemType} at ${gridX},${gridY}`);
            }
        }
    }
}