using Dlhis.Basic.Common.FileOperation.Request;
using Dlhis.Basic.Common.FileOperation.Response;
using Dlhis.Entity.Common.Entities;
using Kurisu.AspNetCore.DataAccess.Dto;
using Kurisu.AspNetCore.DataAccess.SqlSugar.Extensions;
using Kurisu.AspNetCore.DataAccess.SqlSugar.Services;

namespace Dlhis.Basic.Common.FileOperation.Services.Implements;

public class FileVersionService : IFileVersionService
{
    private readonly IMinioService _minioService;
    private readonly IDbContext _dbContext;

    public FileVersionService(IMinioService minioService, IDbContext dbContext)
    {
        _minioService = minioService;
        _dbContext = dbContext;
    }

    public async Task<string> UploadFileAsync(FileVersionUploadRequest request)
    {
        var url = await _minioService.UploadFileAsync(request.Bucket, request.File);

        var version = (await GetLastVersionAsync(request.Code)) + 1;
        await _dbContext.InsertAsync(new FileVersionEntity
        {
            Name = request.Name,
            Url = url,
            Description = request.Description,
            Code = request.Code,
            Version = version,
        });

        return url;
    }

    public async Task<Pagination<FileVersionResponse>> GetPageAsync(PageDto request)
    {
        return await _dbContext.Queryable<FileVersionEntity>()
            .OrderByDescending(x => x.CreateTime)
            .Select<FileVersionResponse>()
            .ToPageListAsync(request);
    }

    public async Task<List<FileVersionResponse>> GetListByCodeAsync(string code)
    {
        return await _dbContext.Queryable<FileVersionEntity>()
            .Where(x => x.Code == code)
            .OrderByDescending(x => x.CreateTime)
            .Select<FileVersionResponse>()
            .ToListAsync();
    }

    public async Task<FileVersionResponse> GetLastByCodeAsync(string code)
    {
        return await _dbContext.Queryable<FileVersionEntity>()
            .Where(x => x.Code == code)
            .OrderByDescending(x => x.Version)
            .Select<FileVersionResponse>()
            .FirstAsync();
    }

    //************************************************************* help methods ***************************************************************

    private async Task<int> GetLastVersionAsync(string code)
    {
        return await _dbContext.Queryable<FileVersionEntity>()
            .Where(x => x.Code == code)
            .OrderByDescending(x => x.Version)
            .Select(x => x.Version)
            .FirstAsync();
    }
}