using Application.Abstractions.Messaging;
using Application.Abstractions.Data;
using SharedKernel.Results;
using SharedKernel.Storage;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Admin.MemberGrade.Create;

public sealed class Handler(IAppDbContext db, IFileStorage fileStorage) : ICommandHandler<Command, Result>
{
    public async Task<Result> Handle(Command request, CancellationToken ct)
    {
        if (await db.MemberGrade.AnyAsync(x => x.KorName == request.KorName, ct))
        {
            return Result.Failure(Error.Conflict("MemberGrade.DuplicateKorName", $"'{request.KorName}'은(는) 이미 등록된 한글 명입니다."));
        }

        if (await db.MemberGrade.AnyAsync(x => x.EngName == request.EngName, ct))
        {
            return Result.Failure(Error.Conflict("MemberGrade.DuplicateEngName", $"'{request.EngName}'은(는) 이미 등록된 영문 명입니다."));
        }

        var memberGrade = Domain.Entities.Members.MemberGrade.Create(
            request.KorName,
            request.EngName,
            request.Order,
            request.IsActive
        );

        await db.MemberGrade.AddAsync(memberGrade, ct);
        await db.SaveChangesAsync(ct);

        FileStoragePath uploadPath = new(UploadTarget.Upload, UploadFolder.MemberGrade, memberGrade.ID);
        string[] allowedFileExtensions = [".jpg", ".jpeg", ".png", ".gif", ".webp"];
        string? imagePath = null;

        if (request.ImageFile is not null)
        {
            imagePath = (await fileStorage.SaveFileAsync(request.ImageFile, uploadPath, allowedFileExtensions, ct))?.Url;
        }

        memberGrade.Update(
            request.KorName,
            request.EngName,
            request.Description,
            request.Order,
            imagePath,
            request.TextColor,
            request.RequiredExp,
            request.RequiredAttendance,
            request.IsActive
        );

        await db.SaveChangesAsync(ct);

        return Result.Success();
    }
}