using Microsoft.AspNetCore.Mvc;
using HardwarePerformance.API.Models;
using HardwarePerformance.Infrastructure.Services;

namespace HardwarePerformance.API.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class ProductsController : ControllerBase
    {
        private static readonly List<Product> _products = new()
        {
            new Product 
            { 
                Id = 1, 
                Name = "Apple A17 Pro", 
                Model = "A17 Pro", 
                Manufacturer = "Apple", 
                CategoryId = 1, 
                CurrentRank = 1,
                ReleaseDate = new DateTime(2023, 9, 12),
                Price = null
            },
            new Product 
            { 
                Id = 2, 
                Name = "Snapdragon 8 Gen 3", 
                Model = "SM8650-AB", 
                Manufacturer = "Qualcomm", 
                CategoryId = 1, 
                CurrentRank = 2,
                ReleaseDate = new DateTime(2023, 10, 24),
                Price = null
            },
            new Product 
            { 
                Id = 3, 
                Name = "Intel Core i9-13900K", 
                Model = "Core i9-13900K", 
                Manufacturer = "Intel", 
                CategoryId = 3, 
                CurrentRank = 1,
                ReleaseDate = new DateTime(2022, 10, 20),
                Price = 589.99m
            },
            new Product 
            { 
                Id = 4, 
                Name = "AMD Ryzen 9 7950X", 
                Model = "Ryzen 9 7950X", 
                Manufacturer = "AMD", 
                CategoryId = 3, 
                CurrentRank = 2,
                ReleaseDate = new DateTime(2022, 9, 27),
                Price = 699.99m
            },
            new Product 
            { 
                Id = 5, 
                Name = "NVIDIA GeForce RTX 4090", 
                Model = "RTX 4090", 
                Manufacturer = "NVIDIA", 
                CategoryId = 4, 
                CurrentRank = 1,
                ReleaseDate = new DateTime(2022, 10, 12),
                Price = 1599.99m
            },
            new Product 
            { 
                Id = 6, 
                Name = "AMD Radeon RX 7900 XTX", 
                Model = "RX 7900 XTX", 
                Manufacturer = "AMD", 
                CategoryId = 4, 
                CurrentRank = 2,
                ReleaseDate = new DateTime(2022, 12, 3),
                Price = 999.99m
            }
        };

        private readonly IRedisCacheService _cacheService;

        public ProductsController(IRedisCacheService cacheService)
        {
            _cacheService = cacheService;
        }

        [HttpGet]
        public async Task<ActionResult<PagedResponse<Product>>> GetProducts(
            [FromQuery] int? categoryId, 
            [FromQuery] int page = 1, 
            [FromQuery] int pageSize = 10,
            [FromQuery] string sortBy = "CurrentRank",
            [FromQuery] string order = "asc")
        {
            // 创建缓存键
            var cacheKey = $"products:list:{categoryId ?? 0}:{page}:{pageSize}:{sortBy}:{order}";
            
            // 尝试从缓存获取数据
            var cachedResult = await _cacheService.GetAsync<PagedResponse<Product>>(cacheKey);
            if (cachedResult != null)
            {
                return Ok(cachedResult);
            }

            var query = _products.AsEnumerable();
            
            if (categoryId.HasValue)
            {
                query = query.Where(p => p.CategoryId == categoryId.Value);
            }

            // 排序
            query = sortBy.ToLower() switch
            {
                "name" => order.ToLower() == "desc" ? query.OrderByDescending(p => p.Name) : query.OrderBy(p => p.Name),
                "manufacturer" => order.ToLower() == "desc" ? query.OrderByDescending(p => p.Manufacturer) : query.OrderBy(p => p.Manufacturer),
                "releasedate" => order.ToLower() == "desc" ? query.OrderByDescending(p => p.ReleaseDate) : query.OrderBy(p => p.ReleaseDate),
                "price" => order.ToLower() == "desc" ? query.OrderByDescending(p => p.Price) : query.OrderBy(p => p.Price),
                _ => order.ToLower() == "desc" ? query.OrderByDescending(p => p.CurrentRank) : query.OrderBy(p => p.CurrentRank)
            };

            var totalCount = query.Count();
            var totalPages = (int)Math.Ceiling((double)totalCount / pageSize);
            var items = query.Skip((page - 1) * pageSize).Take(pageSize).ToList();

            var result = new PagedResponse<Product>
            {
                Items = items,
                TotalCount = totalCount,
                PageNumber = page,
                PageSize = pageSize,
                TotalPages = totalPages
            };

            // 将结果存入缓存，设置5分钟过期时间
            await _cacheService.SetAsync(cacheKey, result, TimeSpan.FromMinutes(5));

            return Ok(result);
        }

        [HttpGet("{id}")]
        public async Task<ActionResult<ApiResponse<Product>>> GetProduct(int id)
        {
            // 创建缓存键
            var cacheKey = $"product:detail:{id}";
            
            // 尝试从缓存获取数据
            var cachedResult = await _cacheService.GetAsync<ApiResponse<Product>>(cacheKey);
            if (cachedResult != null)
            {
                return Ok(cachedResult);
            }

            var product = _products.FirstOrDefault(p => p.Id == id);
            if (product == null)
            {
                var notFoundResponse = new ApiResponse<Product>
                {
                    Success = false,
                    Message = "未找到指定的产品"
                };
                
                // 缓存未找到的结果，设置较短过期时间
                await _cacheService.SetAsync(cacheKey, notFoundResponse, TimeSpan.FromMinutes(1));
                
                return NotFound(notFoundResponse);
            }

            var result = new ApiResponse<Product>
            {
                Data = product
            };

            // 将结果存入缓存，设置15分钟过期时间
            await _cacheService.SetAsync(cacheKey, result, TimeSpan.FromMinutes(15));

            return Ok(result);
        }

        [HttpGet("search")]
        public async Task<ActionResult<PagedResponse<Product>>> SearchProducts(
            [FromQuery] string q,
            [FromQuery] int? categoryId,
            [FromQuery] string? manufacturer,
            [FromQuery] int? minScore,
            [FromQuery] int? maxScore,
            [FromQuery] int page = 1,
            [FromQuery] int pageSize = 10)
        {
            // 创建缓存键
            var cacheKey = $"products:search:{q ?? ""}:{categoryId ?? 0}:{manufacturer ?? ""}:{minScore ?? 0}:{maxScore ?? 0}:{page}:{pageSize}";
            
            // 尝试从缓存获取数据
            var cachedResult = await _cacheService.GetAsync<PagedResponse<Product>>(cacheKey);
            if (cachedResult != null)
            {
                return Ok(cachedResult);
            }

            var query = _products.AsEnumerable();
            
            if (!string.IsNullOrWhiteSpace(q))
            {
                query = query.Where(p => 
                    p.Name.Contains(q, StringComparison.OrdinalIgnoreCase) ||
                    p.Model.Contains(q, StringComparison.OrdinalIgnoreCase) ||
                    p.Manufacturer.Contains(q, StringComparison.OrdinalIgnoreCase));
            }
            
            if (categoryId.HasValue)
            {
                query = query.Where(p => p.CategoryId == categoryId.Value);
            }
            
            if (!string.IsNullOrWhiteSpace(manufacturer))
            {
                query = query.Where(p => 
                    p.Manufacturer.Equals(manufacturer, StringComparison.OrdinalIgnoreCase));
            }

            // 注意：这里我们使用CurrentRank作为性能分数的替代，因为实际产品中没有性能分数字段
            if (minScore.HasValue)
            {
                query = query.Where(p => (100 - p.CurrentRank) >= minScore.Value);
            }
            
            if (maxScore.HasValue)
            {
                query = query.Where(p => (100 - p.CurrentRank) <= maxScore.Value);
            }

            var totalCount = query.Count();
            var totalPages = (int)Math.Ceiling((double)totalCount / pageSize);
            var items = query.Skip((page - 1) * pageSize).Take(pageSize).ToList();

            var result = new PagedResponse<Product>
            {
                Items = items,
                TotalCount = totalCount,
                PageNumber = page,
                PageSize = pageSize,
                TotalPages = totalPages
            };

            // 将结果存入缓存，设置3分钟过期时间（搜索结果变化较快）
            await _cacheService.SetAsync(cacheKey, result, TimeSpan.FromMinutes(3));

            return Ok(result);
        }
    }
}