using Godot;

public partial class ProductionLineItem : Panel
{
    private Label nameLabel;
    private Label productionLabel;
    private Label timeLabel;
    private Label powerLabel;
    private Label buildingLabel;
    private Label deviceLabel;
    private Button addButton;
    private Button removeButton;
    private ColorRect progressFill;
    private TextureRect iconTexture;
    
    private ProductionLineManager.ProductionLine productionLine;
    private string productionLineId;

    public override void _Ready()
    {
        // 获取UI组件引用
        nameLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/MiddleContainer/TopInfoRow/NameLabel");
        productionLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/MiddleContainer/TopInfoRow/ProductionLabel");
        timeLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/MiddleContainer/InfoRow/TimeLabel");
        powerLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/MiddleContainer/InfoRow/PowerLabel");
        buildingLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/MiddleContainer/InfoRow/BuildingLabel");
        deviceLabel = GetNode<Label>("MarginContainer/VBoxContainer/TopRow/RightContainer/BuildingCountRow/DeviceLabel");
        addButton = GetNode<Button>("MarginContainer/VBoxContainer/TopRow/RightContainer/ButtonsRow/AddButton");
        removeButton = GetNode<Button>("MarginContainer/VBoxContainer/TopRow/RightContainer/ButtonsRow/RemoveButton");
        progressFill = GetNode<ColorRect>("MarginContainer/VBoxContainer/ProgressContainer/ProgressFill");
        iconTexture = GetNode<TextureRect>("MarginContainer/VBoxContainer/TopRow/IconTexture");
        
        // 连接按钮信号
        addButton.Pressed += OnAddButtonPressed;
        removeButton.Pressed += OnRemoveButtonPressed;
        
        // 如果生产线数据已经设置，现在应用它
        if (productionLine != null)
        {
            ApplyProductionLineData();
        }
    }

    public void SetupProductionLine(ProductionLineManager.ProductionLine line)
    {
        productionLine = line;
        productionLineId = line.Id;
        
        // 如果UI组件还没有初始化，延迟设置
        if (nameLabel == null)
        {
            GD.Print("UI组件还未初始化，延迟设置生产线数据");
            CallDeferred(nameof(ApplyProductionLineData));
            return;
        }
        
        ApplyProductionLineData();
    }

    private void ApplyProductionLineData()
    {
        if (productionLine == null)
        {
            GD.PrintErr("productionLine为null，无法应用数据");
            return;
        }
        
        // 确保UI组件已初始化
        if (nameLabel == null)
        {
            GD.PrintErr("nameLabel仍然为null，UI初始化可能失败");
            return;
        }
        
        // 设置基本信息
        nameLabel.Text = productionLine.Name;
        timeLabel.Text = $"{productionLine.ProductionTime:F1}s";
        powerLabel.Text = $"{productionLine.PowerConsumption}W";
        
        // 设置建筑需求信息
        if (productionLine.BuildingRequirements != null && productionLine.BuildingRequirements.Count > 0)
        {
            var firstRequirement = productionLine.BuildingRequirements[0];
            var buildingItem = GameData.Instance?.GetItem(firstRequirement.ItemId);
            string buildingName = buildingItem?.Name ?? firstRequirement.ItemId;
            
            if (productionLine.BuildingRequirements.Count == 1)
            {
                buildingLabel.Text = $"需要: {firstRequirement.Quantity}x{buildingName}";
            }
            else
            {
                buildingLabel.Text = $"需要: {firstRequirement.Quantity}x{buildingName}...";
            }
        }
        else
        {
            buildingLabel.Text = "无建筑需求";
        }
        
        // 尝试加载图标
        LoadProductionLineIcon();
        
        // 初始更新显示
        UpdateDisplay();
        
        GD.Print($"成功设置生产线数据: {productionLine.Name}");
    }

    private void LoadProductionLineIcon()
    {
        if (productionLine == null) return;
        
        // 尝试加载产线专用图标，如果没有则使用建筑图标
        string iconPath = $"res://assets/textures/production_lines/{productionLineId}.png";
        
        if (!ResourceLoader.Exists(iconPath))
        {
            // 回退到建筑图标（使用第一个建筑需求的图标）
            if (productionLine.BuildingRequirements != null && productionLine.BuildingRequirements.Count > 0)
            {
                var firstRequirement = productionLine.BuildingRequirements[0];
                var buildingItem = GameData.Instance?.GetItem(firstRequirement.ItemId);
                if (buildingItem != null && !string.IsNullOrEmpty(buildingItem.IconPath))
                {
                    iconPath = buildingItem.IconPath;
                }
            }
        }
        
        if (ResourceLoader.Exists(iconPath))
        {
            var texture = GD.Load<Texture2D>(iconPath);
            if (texture != null)
            {
                iconTexture.Texture = texture;
            }
        }
    }

    public override void _Process(double delta)
    {
        // 只有当UI组件准备好且有生产线数据时才更新显示
        if (productionLine != null && nameLabel != null)
        {
            UpdateDisplay();
        }
    }

    private void UpdateDisplay()
    {
        if (productionLine == null) return;
        
        // 确保UI组件已初始化
        if (deviceLabel == null || productionLabel == null || progressFill == null)
        {
            return; // UI组件还没准备好，跳过更新
        }
        
        var activeLine = ProductionLineManager.Instance?.GetActiveProductionLine(productionLineId);
        var status = ProductionProcessor.Instance?.GetProductionLineStatus(productionLineId);
        
        if (activeLine != null && status != null)
        {
            // 更新设备数量
            deviceLabel.Text = $"设备: {activeLine.BuildingCount}";
            
            // 更新产出率
            if (activeLine.IsActive && activeLine.ProductionRate > 0)
            {
                productionLabel.Text = $"{activeLine.ProductionRate:F1}/s";
            }
            else
            {
                productionLabel.Text = "0/s";
            }
            
            // 更新进度条
            progressFill.AnchorRight = status.Progress;
            
            // 更新按钮状态
            UpdateButtonStates();
        }
        else
        {
            // 没有激活的产线
            deviceLabel.Text = "设备: 0";
            productionLabel.Text = "0/s";
            progressFill.AnchorRight = 0;
            UpdateButtonStates();
        }
    }

    private void UpdateButtonStates()
    {
        if (productionLine == null) return;
        
        // 确保按钮组件已初始化
        if (addButton == null || removeButton == null)
        {
            return; // 按钮还没准备好，跳过更新
        }
        
        // 检查是否有足够的建筑材料来添加设备
        bool canAdd = CanAddBuilding();
        addButton.Disabled = !canAdd;
        
        // 检查是否有设备可以移除
        var activeLine = ProductionLineManager.Instance?.GetActiveProductionLine(productionLineId);
        removeButton.Disabled = activeLine == null || activeLine.BuildingCount <= 0;
    }

    private bool CanAddBuilding()
    {
        if (productionLine?.BuildingRequirements == null) return true;
        
        var inventoryManager = InventoryManager.Instance;
        if (inventoryManager == null) return false;
        
        // 检查是否有足够的建筑材料
        foreach (var requirement in productionLine.BuildingRequirements)
        {
            int available = inventoryManager.GetItemQuantity(requirement.ItemId);
            if (available < requirement.Quantity)
            {
                return false;
            }
        }
        
        return true;
    }

    private void OnAddButtonPressed()
    {
        if (productionLine == null) return;
        
        // 直接尝试添加建筑到产线（材料检查和扣除在ProductionLineManager中处理）
        ProductionLineManager.Instance?.AddBuilding(productionLineId, 1);
    }

    private void OnRemoveButtonPressed()
    {
        if (productionLine == null) return;
        
        // 从产线移除建筑（建筑会自动返回库存）
        ProductionLineManager.Instance?.RemoveBuilding(productionLineId, 1);
        
        GD.Print($"移除了 {productionLine.Name} 产线的一个设备");
    }
}