using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Authorization;
using ToolHub.Models;

namespace ToolHub.Controllers;

[Authorize(Roles = "Admin")]
public class CategoryController : Controller
{
    private readonly IFreeSql _freeSql;

    public CategoryController(IFreeSql freeSql)
    {
        _freeSql = freeSql;
    }

    // 类别管理页面
    public async Task<IActionResult> Index(int page = 1)
    {
        var pageSize = 20;
        var categories = await _freeSql.Select<Category>()
            .IncludeMany(c => c.Tools)
            .Where(c => c.IsActive)
            .OrderBy(c => c.SortOrder)
            .Page(page, pageSize)
            .ToListAsync();
            
        // 获取总数用于分页
        var totalCount = (int)await _freeSql.Select<Category>()
            .Where(c => c.IsActive)
            .CountAsync();
        var totalPages = (int)Math.Ceiling((double)totalCount / pageSize);
        
        ViewBag.CurrentPage = page;
        ViewBag.TotalCount = totalCount;
        ViewBag.TotalPages = totalPages;
        ViewBag.PageSize = pageSize;
        
        return View(categories);
    }

    // 获取分页分类列表（AJAX）
    [HttpGet]
    public async Task<IActionResult> GetCategories(int page = 1)
    {
        try
        {
            var pageSize = 20;
            var categories = await _freeSql.Select<Category>()
                .IncludeMany(c => c.Tools)
                .Where(c => c.IsActive)
                .OrderBy(c => c.SortOrder)
                .Page(page, pageSize)
                .ToListAsync();
                
            var totalCount = (int)await _freeSql.Select<Category>()
                .Where(c => c.IsActive)
                .CountAsync();
            var totalPages = (int)Math.Ceiling((double)totalCount / pageSize);
            
            return Json(new
            {
                categories = categories,
                pagination = new
                {
                    currentPage = page,
                    totalPages = totalPages,
                    totalCount = totalCount,
                    pageSize = pageSize,
                    hasNext = page < totalPages,
                    hasPrev = page > 1
                }
            });
        }
        catch
        {
            return Json(new { success = false, message = "获取分类列表失败" });
        }
    }

    // 保存类别（添加/编辑）
    [HttpPost]
    public async Task<IActionResult> Save([FromBody] CategoryDto categoryDto)
    {
        try
        {
            if (categoryDto.Id == 0)
            {
                // 添加新分类
                var category = new Category
                {
                    Name = categoryDto.Name,
                    Description = categoryDto.Description,
                    Icon = categoryDto.Icon,
                    Color = categoryDto.Color,
                    SortOrder = categoryDto.SortOrder,
                    IsActive = true
                };
                await _freeSql.Insert(category).ExecuteAffrowsAsync();
            }
            else
            {
                // 更新分类
                await _freeSql.Update<Category>()
                    .Where(c => c.Id == categoryDto.Id)
                    .Set(c => c.Name, categoryDto.Name)
                    .Set(c => c.Description, categoryDto.Description)
                    .Set(c => c.Icon, categoryDto.Icon)
                    .Set(c => c.Color, categoryDto.Color)
                    .Set(c => c.SortOrder, categoryDto.SortOrder)
                    .Set(c => c.UpdatedAt, DateTime.Now)
                    .ExecuteAffrowsAsync();
            }
            return Json(new { success = true });
        }
        catch
        {
            return Json(new { success = false });
        }
    }

    // 切换类别状态
    [HttpPost]
    public async Task<IActionResult> ToggleStatus([FromBody] ToggleCategoryStatusRequest request)
    {
        try
        {
            await _freeSql.Update<Category>()
                .Where(c => c.Id == request.Id)
                .Set(c => c.IsActive, request.IsActive)
                .Set(c => c.UpdatedAt, DateTime.Now)
                .ExecuteAffrowsAsync();
            return Json(new { success = true });
        }
        catch
        {
            return Json(new { success = false });
        }
    }

    // 删除类别
    [HttpPost]
    public async Task<IActionResult> Delete([FromBody] DeleteCategoryRequest request)
    {
        try
        {
            // 检查是否有工具使用此分类
            var toolCount = await _freeSql.Select<Tool>().Where(t => t.CategoryId == request.Id).CountAsync();
            if (toolCount > 0)
            {
                return Json(new { success = false, message = "该分类下还有工具，无法删除" });
            }
            
            await _freeSql.Delete<Category>().Where(c => c.Id == request.Id).ExecuteAffrowsAsync();
            return Json(new { success = true });
        }
        catch
        {
            return Json(new { success = false });
        }
    }

    // 获取类别列表（用于下拉选择）
    [HttpGet]
    public async Task<IActionResult> GetList()
    {
        try
        {
            var categories = await _freeSql.Select<Category>()
                .Where(c => c.IsActive)
                .OrderBy(c => c.SortOrder)
                .ToListAsync();
            return Json(categories);
        }
        catch
        {
            return Json(new List<Category>());
        }
    }
}

// DTOs
public class CategoryDto
{
    public int Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public string? Description { get; set; }
    public string? Icon { get; set; }
    public string? Color { get; set; }
    public int SortOrder { get; set; }
}

public class ToggleCategoryStatusRequest
{
    public int Id { get; set; }
    public bool IsActive { get; set; }
}

public class DeleteCategoryRequest
{
    public int Id { get; set; }
}