using Sharp.NetServer.Attributes;
using Sharp.NetServer.Controllers;
using Sharp.NetServer.Models;

namespace NetServer.Test.Examples.Controllers;

/// <summary>
/// 产品管理控制器示例
/// </summary>
[ApiController]
[Route("api/products")]
public class ProductController : BaseController
{
    private static readonly List<Product> Products = new()
    {
        new Product { Id = 1, Name = "笔记本电脑", Price = 5999.00m, Stock = 50, Category = "电子产品" },
        new Product { Id = 2, Name = "无线鼠标", Price = 99.00m, Stock = 200, Category = "电子产品" },
        new Product { Id = 3, Name = "机械键盘", Price = 399.00m, Stock = 100, Category = "电子产品" },
        new Product { Id = 4, Name = "显示器", Price = 1299.00m, Stock = 30, Category = "电子产品" }
    };

    /// <summary>
    /// 获取所有产品（公开接口，带缓存和限流）
    /// GET /api/products
    /// </summary>
    [AllowAnonymous]
    [RateLimit(200, RateLimitScope.Ip)]
    [ResponseCache(60, VaryByQueryKeys = true)]
    [HttpGet]
    public async Task GetAllProductsAsync(HttpContext context)
    {
        var category = GetQueryParam(context, "category", "");
        var products = string.IsNullOrEmpty(category)
            ? Products
            : Products.Where(p => p.Category.Equals(category, StringComparison.OrdinalIgnoreCase)).ToList();

        await WriteSuccessResponseAsync(context, products);
    }

    /// <summary>
    /// 获取产品详情
    /// GET /api/products/1
    /// </summary>
    [AllowAnonymous]
    [ResponseCache(30)]
    [HttpGet("{id}")]
    public async Task GetProductByIdAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments.LastOrDefault()?.TrimEnd('/');
        if (int.TryParse(idStr, out var id))
        {
            var product = Products.FirstOrDefault(p => p.Id == id);
            if (product != null)
            {
                await WriteSuccessResponseAsync(context, product);
                return;
            }
        }

        await NotFoundAsync(context, "产品未找到");
    }

    /// <summary>
    /// 创建产品（需要认证）
    /// POST /api/products
    /// Body: { "name": "新产品", "price": 199.00, "stock": 100, "category": "类别" }
    /// </summary>
    [Authorize(Roles = "Admin")]
    [RateLimit(20, RateLimitScope.User)]
    [HttpPost]
    public async Task CreateProductAsync(HttpContext context)
    {
        var productData = await ReadJsonBodyAsync<Product>(context);

        if (productData == null || string.IsNullOrEmpty(productData.Name) || productData.Price <= 0)
        {
            await BadRequestAsync(context, "无效的产品数据");
            return;
        }

        productData.Id = Products.Max(p => p.Id) + 1;
        Products.Add(productData);

        await WriteSuccessResponseAsync(context, productData, "产品创建成功");
    }

    /// <summary>
    /// 更新库存
    /// PATCH /api/products/1/stock
    /// Body: { "quantity": 10 }
    /// </summary>
    [Authorize]
    [HttpPatch("{id}/stock")]
    public async Task UpdateStockAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments[^2].TrimEnd('/');
        if (!int.TryParse(idStr, out var id))
        {
            await BadRequestAsync(context, "无效的产品ID");
            return;
        }

        var product = Products.FirstOrDefault(p => p.Id == id);
        if (product == null)
        {
            await NotFoundAsync(context, "产品未找到");
            return;
        }

        var stockUpdate = await ReadJsonBodyAsync<Dictionary<string, object>>(context);
        if (stockUpdate != null && stockUpdate.TryGetValue("quantity", out var quantityObj))
            if (int.TryParse(quantityObj.ToString(), out var quantity))
            {
                product.Stock = quantity;
                await WriteSuccessResponseAsync(context, product, "库存更新成功");
                return;
            }

        await BadRequestAsync(context, "无效的库存数量");
    }

    /// <summary>
    /// 删除产品
    /// DELETE /api/products/1
    /// </summary>
    [Authorize(Roles = "Admin")]
    [HttpDelete("{id}")]
    public async Task DeleteProductAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments.LastOrDefault()?.TrimEnd('/');
        if (!int.TryParse(idStr, out var id))
        {
            await BadRequestAsync(context, "无效的产品ID");
            return;
        }

        var product = Products.FirstOrDefault(p => p.Id == id);
        if (product == null)
        {
            await NotFoundAsync(context, "产品未找到");
            return;
        }

        Products.Remove(product);
        await WriteSuccessResponseAsync(context, new { id }, "产品删除成功");
    }

    /// <summary>
    /// 搜索产品
    /// GET /api/products/search?q=键盘&minPrice=100&maxPrice=500
    /// </summary>
    [AllowAnonymous]
    [RateLimit(150, RateLimitScope.Ip)]
    [HttpGet("search")]
    public async Task SearchProductsAsync(HttpContext context)
    {
        var query = GetQueryParam(context, "q", "");
        var minPriceStr = GetQueryParam(context, "minPrice", "0");
        var maxPriceStr = GetQueryParam(context, "maxPrice", decimal.MaxValue.ToString());

        decimal.TryParse(minPriceStr, out var minPrice);
        decimal.TryParse(maxPriceStr, out var maxPrice);

        var results = Products.Where(p =>
            (string.IsNullOrEmpty(query) || p.Name.Contains(query, StringComparison.OrdinalIgnoreCase)) &&
            p.Price >= minPrice &&
            p.Price <= maxPrice
        ).ToList();

        await WriteSuccessResponseAsync(context, new
        {
            query,
            minPrice,
            maxPrice,
            count = results.Count,
            products = results
        });
    }
}

/// <summary>
/// 产品数据模型
/// </summary>
public class Product
{
    public int Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public decimal Price { get; set; }
    public int Stock { get; set; }
    public string Category { get; set; } = string.Empty;
}