using BuildFlow.Shared.Domain.Common;
using BuildFlow.Shared.Domain.Exceptions;
using BuildFlow.Shared.Infrastructure;
using File.Application.Common;
using File.Application.Features.Buckets.Commands;
using File.Application.Features.Buckets.Handlers;
using File.Application.Features.Buckets.Queries;
using File.Application.Features.Folders.Commands;
using File.Application.Features.Folders.DTOs;
using File.Application.Features.Folders.Handlers;
using File.Application.Features.Folders.Queries;
using File.Application.Features.Settings.Commands;
using File.Application.Features.Settings.Handlers;
using File.Application.Features.Settings.Queries;
using File.Application.Features.Shares.Commands;
using File.Application.Features.Shares.Handlers;
using File.Application.Features.Shares.Queries;
using File.Domain.Entities;
using File.Infrastructure.Persistence;
using File.Infrastructure.Storage;
using FluentAssertions;
using MediatR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging.Abstractions;
using Moq;
using Xunit;

namespace BuildFlow.File.Tests;

/// <summary>
/// [SOP-FILE] Folders(非事务部分) + Buckets + Settings + Shares(Create/Delete/Info) 子域补测。
/// 注:DeleteFolder/UploadToFolder 涉及事务或补偿,InMemory 支持有限,此处覆盖不依赖事务的核心路径。
/// 飞书矩阵: file/Folders+Buckets+Settings+Shares 缺口→补
/// </summary>
public class FoldersBucketsSettingsTests
{
    private const string OwnerId = "user-001";

    private static (FileDbContext db, Mock<IS3StorageService> s3, Mock<ICurrentUserContext> user, Mock<IMediator> mediator) CreateDeps(string name)
    {
        var user = new Mock<ICurrentUserContext>();
        user.SetupGet(u => u.UserId).Returns(OwnerId);
        user.SetupGet(u => u.IPAddress).Returns("127.0.0.1");
        var options = new DbContextOptionsBuilder<FileDbContext>()
            .UseInMemoryDatabase($"file-sub-{name}-{Guid.NewGuid():N}")
            .AddInterceptors(new AuditInterceptor(user.Object))
            .Options;
        return (new FileDbContext(options), new Mock<IS3StorageService>(), user, new Mock<IMediator>());
    }

    // ===== Folders: Create / Rename / MoveFile (不依赖事务) =====

    [Fact]
    public async Task CreateFolder_Valid_ReturnsFolderDto()
    {
        var (db, _, user, mediator) = CreateDeps("create");
        var handler = new CreateFolderCommandHandler(db, user.Object, mediator.Object);

        var result = await handler.Handle(new CreateFolderCommand(null, "我的文件夹"), CancellationToken.None);

        result.Name.Should().Be("我的文件夹");
        result.OwnerId.Should().Be(OwnerId);
        (await db.Folders.CountAsync()).Should().Be(1);
    }

    [Fact]
    public async Task CreateFolder_WithParent_LinksCorrectly()
    {
        var (db, _, user, mediator) = CreateDeps("child");
        var createHandler = new CreateFolderCommandHandler(db, user.Object, mediator.Object);
        var parent = await createHandler.Handle(new CreateFolderCommand(null, "父"), CancellationToken.None);

        var child = await createHandler.Handle(new CreateFolderCommand(parent.Id, "子"), CancellationToken.None);

        child.ParentId.Should().Be(parent.Id);
    }

    [Fact]
    public async Task RenameFolder_Existing_ReturnsNewName()
    {
        var (db, _, user, _) = CreateDeps("rename");
        var createHandler = new CreateFolderCommandHandler(db, user.Object, new Mock<IMediator>().Object);
        var created = await createHandler.Handle(new CreateFolderCommand(null, "原名"), CancellationToken.None);

        var renameHandler = new RenameFolderCommandHandler(db, user.Object);
        var result = await renameHandler.Handle(new RenameFolderCommand(created.Id, "新名"), CancellationToken.None);

        result.Name.Should().Be("新名");
    }

    [Fact]
    public async Task MoveFile_UpdatesFolderId()
    {
        var (db, _, user, _) = CreateDeps("move");
        var createHandler = new CreateFolderCommandHandler(db, user.Object, new Mock<IMediator>().Object);
        var folder = await createHandler.Handle(new CreateFolderCommand(null, "目标"), CancellationToken.None);
        var fileId = Guid.NewGuid();
        db.Files.Add(new FileMeta { Id = fileId, Name = "f.txt", S3Key = "k", S3Bucket = "b", ContentType = "text", OwnerId = OwnerId });
        await db.SaveChangesAsync();

        var handler = new MoveFileCommandHandler(db, user.Object);
        await handler.Handle(new MoveFileCommand(fileId, folder.Id), CancellationToken.None);

        (await db.Files.FindAsync(fileId))!.FolderId.Should().Be(folder.Id);
    }

    [Fact]
    public async Task GetRootFiles_ReturnsCurrentUserRootFiles()
    {
        var (db, s3, user, _) = CreateDeps("root");
        db.Files.Add(new FileMeta { Name = "root1.txt", S3Key = "k1", S3Bucket = "b", ContentType = "text", OwnerId = OwnerId, Size = 100 });
        db.Files.Add(new FileMeta { Name = "other.txt", S3Key = "k2", S3Bucket = "b", ContentType = "text", OwnerId = "other-user", Size = 50 });
        await db.SaveChangesAsync();
        var handler = new GetRootFilesQueryHandler(db, user.Object, s3.Object);

        var result = await handler.Handle(new GetRootFilesQuery(), CancellationToken.None);

        result.Should().HaveCount(1);
        result[0].Name.Should().Be("root1.txt");
    }

    [Fact]
    public async Task GetFolderTree_ReturnsUserFolders()
    {
        var (db, s3, user, _) = CreateDeps("tree");
        var createHandler = new CreateFolderCommandHandler(db, user.Object, new Mock<IMediator>().Object);
        await createHandler.Handle(new CreateFolderCommand(null, "F1"), CancellationToken.None);
        await createHandler.Handle(new CreateFolderCommand(null, "F2"), CancellationToken.None);
        var handler = new GetFolderTreeQueryHandler(db, user.Object, s3.Object);

        var result = await handler.Handle(new GetFolderTreeQuery(), CancellationToken.None);

        result.Should().HaveCount(2);
    }

    // ===== Buckets(纯 S3 代理,无 DB) =====

    [Fact]
    public async Task CreateBucket_CallsS3Create()
    {
        var s3 = new Mock<IS3StorageService>();
        var handler = new CreateBucketCommandHandler(s3.Object);

        var result = await handler.Handle(new CreateBucketCommand("my-bucket"), CancellationToken.None);

        result.Should().Be("bucket created");
        s3.Verify(x => x.CreateBucketAsync("my-bucket", It.IsAny<CancellationToken>()), Times.Once);
    }

    [Fact]
    public async Task DeleteBucket_CallsS3Delete()
    {
        var s3 = new Mock<IS3StorageService>();
        var handler = new DeleteBucketCommandHandler(s3.Object);

        var result = await handler.Handle(new DeleteBucketCommand("my-bucket"), CancellationToken.None);

        result.Should().Be("bucket deleted");
        s3.Verify(x => x.DeleteBucketAsync("my-bucket", It.IsAny<CancellationToken>()), Times.Once);
    }

    [Fact]
    public async Task ListBuckets_ReturnsS3List()
    {
        var s3 = new Mock<IS3StorageService>();
        s3.Setup(x => x.ListBucketsAsync(It.IsAny<CancellationToken>()))
          .ReturnsAsync(new List<string> { "bucket-a", "bucket-b" });
        var handler = new ListBucketsQueryHandler(s3.Object);

        var result = await handler.Handle(new ListBucketsQuery(), CancellationToken.None);

        result.Should().HaveCount(2).And.Contain("bucket-a");
    }

    // ===== Settings =====

    [Fact]
    public async Task GetFileSetting_Empty_ReturnsDefault()
    {
        var (db, _, _, _) = CreateDeps("empty-settings");
        var handler = new GetFileSettingQueryHandler(db);

        var result = await handler.Handle(new GetFileSettingQuery(), CancellationToken.None);

        result.DefaultBucket.Should().Be("build-flow");
    }

    [Fact]
    public async Task UpdateDefaultBucket_UpsertsSingleRow()
    {
        var (db, _, _, _) = CreateDeps("update-settings");
        var handler = new UpdateDefaultBucketCommandHandler(db);

        var result = await handler.Handle(new UpdateDefaultBucketCommand("custom-bucket"), CancellationToken.None);

        result.DefaultBucket.Should().Be("custom-bucket");
        (await db.Settings.CountAsync()).Should().Be(1);
        (await db.Settings.FirstAsync()).Id.Should().Be(1, "单行配置 Id 固定 1");
    }

    // ===== Shares: Create / Delete / GetInfo =====

    [Fact]
    public async Task CreateShare_Valid_GeneratesTokenAndBcryptHash()
    {
        var (db, _, user, mediator) = CreateDeps("create-share");
        var fileId = Guid.NewGuid();
        db.Files.Add(new FileMeta { Id = fileId, Name = "doc.pdf", S3Key = "k", S3Bucket = "b", ContentType = "application/pdf", OwnerId = OwnerId });
        await db.SaveChangesAsync();
        var handler = new CreateShareCommandHandler(db, user.Object, mediator.Object);

        var result = await handler.Handle(
            new CreateShareCommand("file", fileId, "secret123", null, null), CancellationToken.None);

        result.Token.Should().HaveLength(32, "16字节随机→32位hex");
        result.Password.Should().BeEmpty("响应不回传密码明文");
        // 验证 DB 里存的是 BCrypt 哈希(而非明文)
        var shareInDb = await db.ShareLinks.FirstAsync();
        shareInDb.Password.Should().NotBe("secret123", "DB 不得存明文");
        BCrypt.Net.BCrypt.Verify("secret123", shareInDb.Password).Should().BeTrue("DB 存 BCrypt 哈希可被校验");
    }

    [Fact]
    public async Task CreateShare_InvalidResourceType_ThrowsBusiness()
    {
        var (db, _, user, mediator) = CreateDeps("bad-type");
        var handler = new CreateShareCommandHandler(db, user.Object, mediator.Object);

        var act = async () => await handler.Handle(
            new CreateShareCommand("invalid", Guid.NewGuid(), null, null, null), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("非法 ResourceType 应拒绝");
    }

    [Fact]
    public async Task DeleteShare_Own_RemovesHard()
    {
        var (db, _, user, _) = CreateDeps("del-share");
        var share = new ShareLink { ResourceType = "file", ResourceId = Guid.NewGuid(), Token = "tok12345678901234567890123456789" };
        db.ShareLinks.Add(share);
        await db.SaveChangesAsync();
        var handler = new DeleteShareCommandHandler(db, user.Object);

        await handler.Handle(new DeleteShareCommand(share.Id), CancellationToken.None);

        (await db.ShareLinks.AnyAsync(s => s.Id == share.Id)).Should().BeFalse("硬删除");
    }

    [Fact]
    public async Task DeleteShare_NotOwner_ThrowsNotFound()
    {
        var (db, _, user, _) = CreateDeps("del-other");
        var share = new ShareLink { ResourceType = "file", ResourceId = Guid.NewGuid(), Token = "tok12345678901234567890123456789" };
        db.ShareLinks.Add(share);
        await db.SaveChangesAsync();
        // user-001 是 owner(AuditInterceptor 填),但我们要模拟"他人"删
        var otherUser = new Mock<ICurrentUserContext>();
        otherUser.SetupGet(u => u.UserId).Returns("other-user");
        var handler = new DeleteShareCommandHandler(db, otherUser.Object);

        var act = async () => await handler.Handle(new DeleteShareCommand(share.Id), CancellationToken.None);

        await act.Should().ThrowAsync<NotFoundException>("非 owner 删应 NotFound(防枚举)");
    }

    [Fact]
    public async Task GetShareInfo_ValidToken_ReturnsInfo()
    {
        var (db, _, _, _) = CreateDeps("info");
        var fileId = Guid.NewGuid();
        db.Files.Add(new FileMeta { Id = fileId, Name = "shared.pdf", S3Key = "k", S3Bucket = "b", ContentType = "application/pdf", OwnerId = OwnerId, Size = 2048 });
        db.ShareLinks.Add(new ShareLink { ResourceType = "file", ResourceId = fileId, Token = "infotoken1234567890123456789012" });
        await db.SaveChangesAsync();
        var handler = new GetShareInfoQueryHandler(db);

        var result = await handler.Handle(new GetShareInfoQuery("infotoken1234567890123456789012"), CancellationToken.None);

        result.Should().NotBeNull();
        result!.FileName.Should().Be("shared.pdf");
        result.FileSize.Should().Be(2048);
    }

    [Fact]
    public async Task GetShareInfo_UnknownToken_ReturnsNull()
    {
        var (db, _, _, _) = CreateDeps("info-404");
        var handler = new GetShareInfoQueryHandler(db);

        var result = await handler.Handle(new GetShareInfoQuery("nonexistent12345678901234567890"), CancellationToken.None);

        result.Should().BeNull();
    }
}