using F9WebAiTest.Application.Common;
using F9WebAiTest.Application.Dtos.Prod;
using F9WebAiTest.Domain.Common;
using F9WebAiTest.Domain.Entities;
using F9WebAiTest.Domain.Entities.Base;
using F9WebAiTest.Domain.Entities.Prod;
using F9WebAiTest.Domain.Enums.SYS.Departments;
using SysDept = F9WebAiTest.Domain.Entities.SYS.Departments;

namespace F9WebAiTest.Application.Services.Prod;

public interface IChejianBanciService
{
    Task<PageResult<ChejianbanciReadDto_View>> GetPagedAsync(int pageIndex, int pageSize, string keyword);
    Task<ChejianbanciReadDto_Edit> GetByIdForEditAsync(long id);
    Task CreateAsync(ChejianbanciReadDto_Edit dto);
    Task UpdateAsync(long id, ChejianbanciReadDto_Edit dto);
    Task DeleteAsync(long id);

    /// <summary>车间下拉：只取职责类型为「前缫」的部门</summary>
    Task<List<ChejianbanciDepOptionDto>> GetQianxianDepsAsync();
}

public class ChejianBanciService : IChejianBanciService
{
    private readonly IRepository<ChejianBanci> _repo;
    private readonly IRepository<SysDept.Department> _deptRepo;

    public ChejianBanciService(IRepository<ChejianBanci> repo, IRepository<SysDept.Department> deptRepo)
    {
        _repo = repo;
        _deptRepo = deptRepo;
    }

    public async Task<PageResult<ChejianbanciReadDto_View>> GetPagedAsync(int pageIndex, int pageSize, string keyword)
    {
        if (pageIndex <= 0) pageIndex = 1;
        if (pageSize <= 0) pageSize = 20;

        var depts = await _deptRepo.GetAllAsync();
        var deptDict = depts.ToDictionary(d => d.Id, d => d.Name);

        var all = await _repo.GetAllAsync();
        var q = all.AsQueryable();

        if (!string.IsNullOrWhiteSpace(keyword))
        {
            var kw = keyword.Trim();
            var kwDeptIds = depts.Where(d => d.Name.Contains(kw)).Select(d => d.Id).ToHashSet();
            q = q.Where(x => kwDeptIds.Contains(x.DeptId) || x.Banci.ToString().Contains(kw));
        }

        var total = q.LongCount();
        var items = q.OrderBy(x => x.DeptId).ThenBy(x => x.Banci)
            .Skip((pageIndex - 1) * pageSize).Take(pageSize)
            .Select(x => new ChejianbanciReadDto_View
            {
                Id = x.Id,
                DepId = x.DeptId,
                Deptname = deptDict.GetValueOrDefault(x.DeptId, ""),
                Banci = x.Banci,
                BanciName = x.Banci.ToString(),
                KaoqinDayhours = x.KaoqinDayhours
            }).ToList();

        return new PageResult<ChejianbanciReadDto_View>
        {
            Items = items,
            Total = total,
            PageIndex = pageIndex,
            PageSize = pageSize
        };
    }

    public async Task<ChejianbanciReadDto_Edit> GetByIdForEditAsync(long id)
    {
        var e = await _repo.GetByIdAsync(id) ?? throw new ServiceException("记录不存在", 404);
        return new ChejianbanciReadDto_Edit
        {
            Id = e.Id,
            DepId = e.DeptId,
            Banci = e.Banci,
            KaoqinDayhours = e.KaoqinDayhours
        };
    }

    public async Task CreateAsync(ChejianbanciReadDto_Edit dto)
    {
        await ValidateAsync(dto, 0);
        await _repo.AddAsync(new ChejianBanci
        {
            DeptId = dto.DepId,
            Banci = dto.Banci,
            KaoqinDayhours = dto.KaoqinDayhours
        });
        await _repo.SaveChangesAsync();
    }

    public async Task UpdateAsync(long id, ChejianbanciReadDto_Edit dto)
    {
        var e = await _repo.GetByIdAsync(id) ?? throw new ServiceException("记录不存在", 404);
        await ValidateAsync(dto, id);

        e.DeptId = dto.DepId;
        e.Banci = dto.Banci;
        e.KaoqinDayhours = dto.KaoqinDayhours;
        await _repo.UpdateAsync(e);
        await _repo.SaveChangesAsync();
    }

    public async Task DeleteAsync(long id)
    {
        var e = await _repo.GetByIdAsync(id) ?? throw new ServiceException("记录不存在", 404);
        await _repo.DeleteAsync(e);
        await _repo.SaveChangesAsync();
    }

    public async Task<List<ChejianbanciDepOptionDto>> GetQianxianDepsAsync()
    {
        var depts = await _deptRepo.GetAllAsync();
        return depts
            .Where(d => d.DutyType == Department_DutyType_Enum.前缫)
            .OrderBy(d => d.SortOrder).ThenBy(d => d.Id)
            .Select(d => new ChejianbanciDepOptionDto { Id = d.Id, Name = d.Name })
            .ToList();
    }

    /// <summary>校验：车间、班次、工时必填，且同一车间的同一班次不可重复</summary>
    private async Task ValidateAsync(ChejianbanciReadDto_Edit dto, long excludeId)
    {
        if (dto.DepId <= 0) throw new ServiceException("请选择车间");
        if (dto.KaoqinDayhours <= 0) throw new ServiceException("日工作小时数必须大于 0");

        var all = await _repo.GetAllAsync();
        if (all.Any(x => x.Id != excludeId && x.DeptId == dto.DepId && x.Banci == dto.Banci))
            throw new ServiceException("该车间的此班次已存在，请勿重复配置");
    }
}