using MediatR;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using TakeoutSaaS.Application.App.Products.Commands;
using TakeoutSaaS.Application.App.Products.Dto;
using TakeoutSaaS.Application.App.Products.Queries;
using TakeoutSaaS.Domain.Products.Enums;
using TakeoutSaaS.Module.Authorization.Attributes;
using TakeoutSaaS.Shared.Abstractions.Constants;
using TakeoutSaaS.Shared.Abstractions.Results;
using TakeoutSaaS.Shared.Web.Api;

namespace TakeoutSaaS.AdminApi.Controllers;

/// <summary>
/// 商品管理。
/// </summary>
[ApiVersion("1.0")]
[Authorize]
[Route("api/admin/v{version:apiVersion}/products")]
public sealed class ProductsController : BaseApiController
{
    private readonly IMediator _mediator;

    /// <summary>
    /// 初始化控制器。
    /// </summary>
    public ProductsController(IMediator mediator)
    {
        _mediator = mediator;
    }

    /// <summary>
    /// 创建商品。
    /// </summary>
    [HttpPost]
    [PermissionAuthorize("product:create")]
    [ProducesResponseType(typeof(ApiResponse<ProductDto>), StatusCodes.Status200OK)]
    public async Task<ApiResponse<ProductDto>> Create([FromBody] CreateProductCommand command, CancellationToken cancellationToken)
    {
        var result = await _mediator.Send(command, cancellationToken);
        return ApiResponse<ProductDto>.Ok(result);
    }

    /// <summary>
    /// 查询商品列表。
    /// </summary>
    [HttpGet]
    [PermissionAuthorize("product:read")]
    [ProducesResponseType(typeof(ApiResponse<PagedResult<ProductDto>>), StatusCodes.Status200OK)]
    public async Task<ApiResponse<PagedResult<ProductDto>>> List(
        [FromQuery] long? storeId,
        [FromQuery] long? categoryId,
        [FromQuery] ProductStatus? status,
        [FromQuery] int page = 1,
        [FromQuery] int pageSize = 20,
        [FromQuery] string? sortBy = null,
        [FromQuery] bool sortDesc = true,
        CancellationToken cancellationToken = default)
    {
        var result = await _mediator.Send(new SearchProductsQuery
        {
            StoreId = storeId,
            CategoryId = categoryId,
            Status = status,
            Page = page,
            PageSize = pageSize,
            SortBy = sortBy,
            SortDescending = sortDesc
        }, cancellationToken);

        return ApiResponse<PagedResult<ProductDto>>.Ok(result);
    }

    /// <summary>
    /// 获取商品详情。
    /// </summary>
    [HttpGet("{productId:long}")]
    [PermissionAuthorize("product:read")]
    [ProducesResponseType(typeof(ApiResponse<ProductDto>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status404NotFound)]
    public async Task<ApiResponse<ProductDto>> Detail(long productId, CancellationToken cancellationToken)
    {
        var result = await _mediator.Send(new GetProductByIdQuery { ProductId = productId }, cancellationToken);
        return result == null
            ? ApiResponse<ProductDto>.Error(ErrorCodes.NotFound, "商品不存在")
            : ApiResponse<ProductDto>.Ok(result);
    }

    /// <summary>
    /// 更新商品。
    /// </summary>
    [HttpPut("{productId:long}")]
    [PermissionAuthorize("product:update")]
    [ProducesResponseType(typeof(ApiResponse<ProductDto>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status404NotFound)]
    public async Task<ApiResponse<ProductDto>> Update(long productId, [FromBody] UpdateProductCommand command, CancellationToken cancellationToken)
    {
        command.ProductId = command.ProductId == 0 ? productId : command.ProductId;
        var result = await _mediator.Send(command, cancellationToken);
        return result == null
            ? ApiResponse<ProductDto>.Error(ErrorCodes.NotFound, "商品不存在")
            : ApiResponse<ProductDto>.Ok(result);
    }

    /// <summary>
    /// 删除商品。
    /// </summary>
    [HttpDelete("{productId:long}")]
    [PermissionAuthorize("product:delete")]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status404NotFound)]
    public async Task<ApiResponse<object>> Delete(long productId, CancellationToken cancellationToken)
    {
        var success = await _mediator.Send(new DeleteProductCommand { ProductId = productId }, cancellationToken);
        return success
            ? ApiResponse<object>.Ok(null)
            : ApiResponse<object>.Error(ErrorCodes.NotFound, "商品不存在");
    }
}