using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Common;
using CommonDomain;
using CommonInfrastructure;
using Microsoft.AspNetCore.Mvc;
using AdminService.Faq;

namespace AdminApi.Faq
{
    [ApiController, Route("adminapi/[controller]")]
    public class FaqController : BaseController
    {
        private readonly IFaqService _faqService;

        public FaqController(IFaqService faqService)
        {
            _faqService = faqService;
        }


        /// <summary>
        /// 获取所有板块
        /// </summary>
        [HttpGet("Categories")]
        public async Task<BaseCommonResponse> GetCategories()
        {
            var list = await _faqService.GetAllCategories();
            if (list == null)
                return new ListResponse<FaqCategoryDto> { Code = CommonResponseCodeEnum.Success, Data = new List<FaqCategoryDto>() };
            var dtos = list.Select(MapToCategoryDto).ToList();
            return new ListResponse<FaqCategoryDto>
            {
                Code = CommonResponseCodeEnum.Success,
                Info = "获取成功",
                Data = dtos
            };
        }

        /// <summary>
        /// 获取板块树形结构
        /// </summary>
        [HttpGet("CategoryTree")]
        public async Task<BaseCommonResponse> GetCategoryTree()
        {
            var tree = await _faqService.GetCategoryTree();
            var dtos = tree.Select(MapToTreeNodeDto).ToList();
            return new ListResponse<FaqCategoryTreeNodeDto>
            {
                Code = CommonResponseCodeEnum.Success,
                Info = "获取成功",
                Data = dtos
            };
        }

        /// <summary>
        /// 获取板块详情
        /// </summary>
        [HttpGet("CategoryDetail")]
        public async Task<BaseResponse<FaqCategoryDto>> GetCategoryDetail(string id)
        {
            var category = await _faqService.GetCategoryById(id);
            if (category == null)
                return this.ToFailResult<FaqCategoryDto>("板块不存在");

            return this.ToResult(MapToCategoryDto(category));
        }

        /// <summary>
        /// 添加板块
        /// </summary>
        [HttpPost("AddCategory")]
        public async Task<BaseResponse<string>> AddCategory([FromBody] FaqCategory category)
        {
            var result = await _faqService.AddCategory(category);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }

        /// <summary>
        /// 更新板块
        /// </summary>
        [HttpPost("UpdateCategory")]
        public async Task<BaseResponse<string>> UpdateCategory([FromBody] FaqCategory category)
        {
            var result = await _faqService.UpdateCategory(category);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }

        /// <summary>
        /// 删除板块
        /// </summary>
        [HttpPost("DeleteCategory")]
        public async Task<BaseResponse<string>> DeleteCategory(string id)
        {
            var result = await _faqService.DeleteCategory(id);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }


        /// <summary>
        /// 获取板块下的问题列表
        /// </summary>
        [HttpGet("Questions")]
        public async Task<BaseCommonResponse> GetQuestions(string categoryId)
        {
            var list = await _faqService.GetQuestionsByCategory(categoryId);
            if (list == null)
                return new ListResponse<FaqQuestionDto> { Code = CommonResponseCodeEnum.Success, Data = new List<FaqQuestionDto>() };
            var dtos = list.Select(MapToQuestionDto).ToList();
            return new ListResponse<FaqQuestionDto>
            {
                Code = CommonResponseCodeEnum.Success,
                Info = "获取成功",
                Data = dtos
            };
        }

        /// <summary>
        /// 分页查询问题
        /// </summary>
        [HttpPost("QuestionList")]
        public async Task<BaseCommonResponse> GetQuestionList([FromBody] FaqQueryParam param)
        {
            var result = await _faqService.QueryQuestions(param.CategoryId, param.PageIndex, param.PageSize);
            var dtos = result.list.Select(MapToQuestionDto).ToList();
            return new PageDataResponse<FaqQuestionDto>
            {
                Code = CommonResponseCodeEnum.Success,
                Info = "获取成功",
                Data = dtos,
                Count = (int)result.count
            };
        }

        /// <summary>
        /// 获取问题详情
        /// </summary>
        [HttpGet("QuestionDetail")]
        public async Task<BaseResponse<FaqQuestionDto>> GetQuestionDetail(string id)
        {
            var question = await _faqService.GetQuestionById(id);
            if (question == null)
                return this.ToFailResult<FaqQuestionDto>("问题不存在");

            return this.ToResult(MapToQuestionDto(question));
        }

        /// <summary>
        /// 添加问题
        /// </summary>
        [HttpPost("AddQuestion")]
        public async Task<BaseResponse<string>> AddQuestion([FromBody] FaqQuestion question)
        {
            var result = await _faqService.AddQuestion(question);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }

        /// <summary>
        /// 更新问题
        /// </summary>
        [HttpPost("UpdateQuestion")]
        public async Task<BaseResponse<string>> UpdateQuestion([FromBody] FaqQuestion question)
        {
            var result = await _faqService.UpdateQuestion(question);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }

        /// <summary>
        /// 删除问题
        /// </summary>
        [HttpPost("DeleteQuestion")]
        public async Task<BaseResponse<string>> DeleteQuestion(string id)
        {
            var result = await _faqService.DeleteQuestion(id);
            if (result.ok)
                return this.ToResult(result.msg);
            else
                return this.ToFailResult<string>(result.msg);
        }


        private static FaqCategoryDto MapToCategoryDto(FaqCategory entity)
        {
            if (entity == null) return new FaqCategoryDto();
            return new FaqCategoryDto
            {
                Id = entity.Id ?? "",
                ParentId = entity.ParentId ?? "",
                Name = entity.Name ?? "",
                Icon = entity.Icon ?? "",
                Sort = entity.Sort,
                IsEnable = entity.IsEnable
            };
        }

        private static FaqCategoryTreeNodeDto MapToTreeNodeDto(FaqCategoryTreeNode entity)
        {
            if (entity == null) return new FaqCategoryTreeNodeDto();
            return new FaqCategoryTreeNodeDto
            {
                Id = entity.Id ?? "",
                Name = entity.Name ?? "",
                Icon = entity.Icon ?? "",
                Sort = entity.Sort,
                IsEnable = entity.IsEnable,
                Children = entity.Children?.Select(MapToTreeNodeDto).ToList() ?? new List<FaqCategoryTreeNodeDto>(),
                QuestionCount = entity.QuestionCount
            };
        }

        private static FaqQuestionDto MapToQuestionDto(FaqQuestion entity)
        {
            if (entity == null) return new FaqQuestionDto();
            return new FaqQuestionDto
            {
                Id = entity.Id ?? "",
                CategoryId = entity.CategoryId ?? "",
                Title = entity.Title ?? "",
                Content = entity.Content ?? "",
                Sort = entity.Sort,
                IsEnable = entity.IsEnable,
                CreateTime = entity.CreateTime
            };
        }

    }

    public class FaqCategoryDto
    {
        public string Id { get; set; }
        public string ParentId { get; set; }
        public string Name { get; set; }
        public string Icon { get; set; }
        public int Sort { get; set; }
        public bool IsEnable { get; set; }
    }

    public class FaqCategoryTreeNodeDto
    {
        public string Id { get; set; }
        public string Name { get; set; }
        public string Icon { get; set; }
        public int Sort { get; set; }
        public bool IsEnable { get; set; }
        public List<FaqCategoryTreeNodeDto> Children { get; set; } = new();
        public int QuestionCount { get; set; }
    }

    public class FaqQuestionDto
    {
        public string Id { get; set; }
        public string CategoryId { get; set; }
        public string Title { get; set; }
        public string Content { get; set; }
        public int Sort { get; set; }
        public bool IsEnable { get; set; }
        public DateTime CreateTime { get; set; }
    }

    public class FaqQueryParam
    {
        public string? CategoryId { get; set; }
        public int PageIndex { get; set; } = 1;
        public int PageSize { get; set; } = 10;
    }
}