using Application.Abstractions.Cache;
using Application.Abstractions.Data;
using Application.Abstractions.Forum;
using Application.Abstractions.Messaging.Email;
using Application.Helpers;
using Domain.Entities.Common;
using Domain.Entities.Common.ValueObject;
using Domain.Entities.Forum.Boards;
using Domain.Entities.Members;
using Domain.Entities.Wallets;
using Infrastructure.Persistence;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Storage;
using CreateCommand = Application.Features.Api.Forum.Post.Create.Command;
using CreateHandler = Application.Features.Api.Forum.Post.Create.Handler;

namespace Application.Tests;

/// <summary>
/// D2 M3 수익인증 게시판 이미지 필수 검증 — BoardMeta.Write.RequireImage 게시판에서
/// 이미지 없는 글은 거부(Post.ImageRequired), 본문 임베드 이미지가 있으면 허용됨을 검증한다.
/// proof 보드는 BoardSeeder 로 lazy 시드해 RequireImage=true 로 provisioning 되는지도 함께 확인한다.
/// 공유 antooza_test DB — GUID 회원으로 격리.
/// </summary>
[TestClass]
public sealed class ProofBoardImageRequiredTests
{
    private sealed class NullCacheService : ICacheService
    {
        public Task<T?> GetAsync<T>(string key, CancellationToken ct = default) => Task.FromResult<T?>(default);
        public Task SetAsync<T>(string key, T value, CancellationToken ct = default) => Task.CompletedTask;
        public Task SetAsync<T>(string key, T value, TimeSpan expiry, CancellationToken ct = default) => Task.CompletedTask;
        public Task RemoveAsync(string key, CancellationToken ct = default) => Task.CompletedTask;
        public Task RemoveByPrefixAsync(string prefix, CancellationToken ct = default) => Task.CompletedTask;
        public Task<bool> TryLockAsync(string key, TimeSpan expiry, CancellationToken ct = default) => Task.FromResult(true);
    }

    // 모든 권한 허용 — 검증 대상은 이미지 필수 로직뿐.
    private sealed class AllowAllPermissionService : IBoardPermissionService
    {
        public Task<short> GetMemberPermissionLevelAsync(Member member, int boardID, CancellationToken ct) => Task.FromResult<short>(1000);
        public Task<bool> HasPermissionAsync(Member member, int boardID, short requiredPermission, CancellationToken ct) => Task.FromResult(true);
        public Task<BoardManager?> GetBoardManagerAsync(int boardID, int memberID, CancellationToken ct) => Task.FromResult<BoardManager?>(null);
    }

    // 이미지 필수 테스트는 본문 임베드 이미지로 통과시키므로 파일 저장은 호출되지 않는다.
    private sealed class UnusedFileStorage : IFileStorage
    {
        public Task<FileUploadResult?> SaveFileAsync(Microsoft.AspNetCore.Http.IFormFile? file, FileStoragePath path, string[] allowedExtensions, CancellationToken ct = default)
            => throw new System.NotSupportedException("테스트에서 파일 업로드 경로는 사용하지 않는다");
        public Task<FileUploadResult?> SaveBytesAsync(ReadOnlyMemory<byte> bytes, string extension, FileStoragePath path, CancellationToken ct = default)
            => throw new System.NotSupportedException();
        public void DeleteByUrl(string? url) { }
    }

    private sealed class NullMailService : IMailService
    {
        public Task SendAsync(SendData data, CancellationToken ct = default) => Task.CompletedTask;
    }

    private static CreateHandler NewHandler(AppDbContext db) => new(db, new UnusedFileStorage(), new AllowAllPermissionService(), new NullMailService(), new NullCacheService());

    private static async Task<int> CreateMemberAsync(AppDbContext db)
    {
        var member = Member.Create($"proof-{Guid.NewGuid():N}@antooza.test");
        await db.Member.AddAsync(member);
        await db.SaveChangesAsync(default);

        await db.MemberStats.AddAsync(MemberStats.Create(member.ID));
        await db.Wallet.AddAsync(Wallet.Create(member.ID));
        await db.SaveChangesAsync(default);
        return member.ID;
    }

    private static async Task SeedRewardConfigAsync(AppDbContext db)
    {
        var config = Config.Create();
        config.UpdateReward(new RewardConfig { PostExp = 5, PostPoint = 10, MinPostLength = 0 });
        await db.Config.AddAsync(config);
        await db.SaveChangesAsync(default);
    }

    [TestMethod]
    public async Task ProofBoard_SeededWithRequireImageTrue()
    {
        int boardID;
        using (var db = TestDb.Create())
        {
            boardID = await BoardSeeder.ResolveProofBoardIDAsync(db, default);
        }

        using var verify = TestDb.Create();
        var meta = await verify.BoardMeta.AsNoTracking().SingleAsync(c => c.BoardID == boardID);
        Assert.IsTrue(meta.Write.RequireImage, "proof 보드는 이미지 필수로 시드된다");
        Assert.IsTrue(meta.Write.AllowImage);
    }

    [TestMethod]
    public async Task CreatePost_OnProofBoard_NoImage_Rejected()
    {
        int boardID;
        int memberID;
        using (var db = TestDb.Create())
        {
            await SeedRewardConfigAsync(db);
            memberID = await CreateMemberAsync(db);
            boardID = await BoardSeeder.ResolveProofBoardIDAsync(db, default);
        }

        using (var db = TestDb.Create())
        {
            var result = await NewHandler(db).Handle(
                new CreateCommand(memberID, boardID, null, "수익 자랑", "이미지 없는 본문입니다.", false, false, false, null, null, null, null),
                default);

            Assert.IsTrue(result.IsFailure, "이미지 필수 보드에서 이미지 없는 글은 거부");
            Assert.AreEqual("Post.ImageRequired", result.Error.Code);
        }

        using (var verify = TestDb.Create())
        {
            Assert.AreEqual(0, await verify.Post.CountAsync(c => c.BoardID == boardID), "거부 시 글이 생성되지 않는다");
        }
    }

    [TestMethod]
    public async Task CreatePost_OnProofBoard_WithEmbeddedImage_Allowed()
    {
        int boardID;
        int memberID;
        using (var db = TestDb.Create())
        {
            await SeedRewardConfigAsync(db);
            memberID = await CreateMemberAsync(db);
            boardID = await BoardSeeder.ResolveProofBoardIDAsync(db, default);
        }

        int postID;
        using (var db = TestDb.Create())
        {
            var result = await NewHandler(db).Handle(
                new CreateCommand(memberID, boardID, null, "수익 인증", "<p>인증 스샷</p><img src=\"https://cdn.antooza.test/p/1.png\" />", false, false, false, null, null, null, null),
                default);

            Assert.IsTrue(result.IsSuccess, "본문 임베드 이미지가 있으면 허용");
            postID = result.Value;
        }

        using (var verify = TestDb.Create())
        {
            Assert.IsTrue(await verify.Post.AnyAsync(c => c.ID == postID && c.BoardID == boardID), "글이 등록된다");
        }
    }

    [TestMethod]
    public async Task CreatePost_OnNormalBoard_NoImage_Allowed()
    {
        // RequireImage=false 인 일반 보드는 이미지 없어도 통과 (회귀 방지)
        int boardID;
        int memberID;
        using (var db = TestDb.Create())
        {
            await SeedRewardConfigAsync(db);
            memberID = await CreateMemberAsync(db);

            var group = new BoardGroup { Code = $"g{Guid.NewGuid():N}"[..12], Name = "그룹" };
            await db.BoardGroup.AddAsync(group);
            await db.SaveChangesAsync(default);
            var board = new Board { BoardGroupID = group.ID, Code = $"b{Guid.NewGuid():N}"[..12], Name = "일반보드", IsActive = true };
            await db.Board.AddAsync(board);
            await db.SaveChangesAsync(default);
            await db.BoardMeta.AddAsync(new BoardMeta { BoardID = board.ID });
            await db.SaveChangesAsync(default);
            boardID = board.ID;
        }

        using (var db = TestDb.Create())
        {
            var result = await NewHandler(db).Handle(
                new CreateCommand(memberID, boardID, null, "일반글", "이미지 없는 일반 본문", false, false, false, null, null, null, null),
                default);
            Assert.IsTrue(result.IsSuccess, "이미지 필수가 아닌 보드는 이미지 없어도 등록");
        }
    }
}