using BuildFlow.Shared.Domain.Exceptions;
using BuildFlow.Workflow.Tests;
using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using Workflow.Application.BuildFlow.Shares.Commands;
using Workflow.Application.BuildFlow.Shares.DTOs;
using Workflow.Application.BuildFlow.Shares.Handlers;
using Workflow.Application.BuildFlow.Shares.Queries;
using Workflow.Domain.Entities;
using Workflow.Domain.Enums;
using Workflow.Infrastructure.Persistence;
using Xunit;

namespace BuildFlow.Workflow.Tests.BuildFlow.Shares;

/// <summary>
/// [B-补测试] BuildFlow/Shares 子域全 Handler 覆盖。
/// 覆盖:CreateFormShare / DeleteFormShare / GetFormShareList / GetFormShareByToken / SubmitSharedForm。
/// 飞书矩阵原标记 workflow/BuildFlow/Shares 零覆盖 → 本次全补。
/// </summary>
public class FormShareHandlerTests
{
    private static async Task<Guid> SeedFormDefinition(WorkflowDbContext db, string schema = "{}")
    {
        var form = new FormDefinition
        {
            Id = Guid.NewGuid(),
            Name = "测试表单",
            Code = "test-form",
            SchemaJson = schema,
        };
        db.FormDefinitions.Add(form);
        await db.SaveChangesAsync();
        return form.Id;
    }

    private static async Task<FormShareDto> SeedShare(
        WorkflowDbContext db, Guid formId, BuildFlowSharePermission permission = BuildFlowSharePermission.View,
        string? password = null, DateTime? expiresAt = null, int? maxViews = null)
    {
        var handler = new CreateFormShareCommandHandler(db);
        return await handler.Handle(
            new CreateFormShareCommand(formId, permission, true, password, expiresAt, maxViews, "备注"),
            CancellationToken.None);
    }

    [Fact]
    public async Task Create_Valid_PersistsAndReturnsToken()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);

        var result = await new CreateFormShareCommandHandler(db).Handle(
            new CreateFormShareCommand(formId, BuildFlowSharePermission.Edit, true, null, null, null, "对外收集"),
            CancellationToken.None);

        result.Token.Should().MatchRegex("^[0-9a-f]{32}$", "token 应为 32 位 hex");
        result.Permission.Should().Be(BuildFlowSharePermission.Edit);
        result.Remark.Should().Be("对外收集");
        (await db.BuildFlowFormShares.CountAsync()).Should().Be(1);
    }

    [Fact]
    public async Task Create_FormNotFound_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var handler = new CreateFormShareCommandHandler(db);

        var act = async () => await handler.Handle(
            new CreateFormShareCommand(Guid.NewGuid(), BuildFlowSharePermission.View, true, null, null, null, null),
            CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("表单定义不存在应拒绝");
    }

    [Fact]
    public async Task Create_WithPassword_HashesPassword()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);

        var result = await new CreateFormShareCommandHandler(db).Handle(
            new CreateFormShareCommand(formId, BuildFlowSharePermission.View, true, "secret123", null, null, null),
            CancellationToken.None);

        var entity = await db.BuildFlowFormShares.SingleAsync(s => s.Id == result.Id);
        entity.Password.Should().NotBe("secret123", "明文密码不得入库");
        entity.Password.Should().StartWith("$2", "应为 bcrypt 哈希");
    }

    [Fact]
    public async Task Delete_Existing_Removes()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId);

        await new DeleteFormShareCommandHandler(db).Handle(
            new DeleteFormShareCommand(share.Id), CancellationToken.None);

        (await db.BuildFlowFormShares.IgnoreQueryFilters().CountAsync(s => s.Id == share.Id))
            .Should().Be(0, "物理删除后不存在");
    }

    [Fact]
    public async Task Delete_NotFound_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var handler = new DeleteFormShareCommandHandler(db);

        var act = async () => await handler.Handle(
            new DeleteFormShareCommand(Guid.NewGuid()), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>();
    }

    [Fact]
    public async Task GetList_ReturnsAll()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        await SeedShare(db, formId);
        await SeedShare(db, formId);

        var result = await new GetFormShareListQueryHandler(db).Handle(
            new GetFormShareListQuery(null, null, 1, 20), CancellationToken.None);

        result.Total.Should().Be(2);
        result.Items.Should().HaveCount(2);
    }

    [Fact]
    public async Task GetList_FiltersByFormDefinitionId()
    {
        await using var db = TestDbFactory.Create();
        var formA = await SeedFormDefinition(db);
        var formB = await SeedFormDefinition(db);
        await SeedShare(db, formA);
        await SeedShare(db, formB);

        var result = await new GetFormShareListQueryHandler(db).Handle(
            new GetFormShareListQuery(formA, null, 1, 20), CancellationToken.None);

        result.Total.Should().Be(1);
        result.Items.Should().ContainSingle(x => x.FormDefinitionId == formA);
    }

    [Fact]
    public async Task GetByToken_Valid_IncrementsViewCountAndReturnsForm()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db, """{"type":"form"}""");
        var share = await SeedShare(db, formId, BuildFlowSharePermission.View);

        var result = await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, null), CancellationToken.None);

        result.FormDefinitionId.Should().Be(formId);
        result.FormName.Should().Be("测试表单");
        result.SchemaJson.Should().Be("""{"type":"form"}""");
        var entity = await db.BuildFlowFormShares.SingleAsync(s => s.Id == share.Id);
        entity.ViewCount.Should().Be(1, "查看次数应自增");
    }

    [Fact]
    public async Task GetByToken_NotFound_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();

        var act = async () => await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery("nope", null), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>();
    }

    [Fact]
    public async Task GetByToken_Expired_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, expiresAt: DateTime.UtcNow.AddMinutes(-1));

        var act = async () => await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, null), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("过期应拒绝");
    }

    [Fact]
    public async Task GetByToken_MaxViewsReached_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, maxViews: 1);
        // 先消费一次额度
        await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, null), CancellationToken.None);

        var act = async () => await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, null), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("达到查看上限应拒绝");
    }

    [Fact]
    public async Task GetByToken_PasswordProtected_CorrectPassword_Returns()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, password: "secret123");

        var result = await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, "secret123"), CancellationToken.None);

        result.FormDefinitionId.Should().Be(formId);
    }

    [Fact]
    public async Task GetByToken_PasswordProtected_WrongPassword_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, password: "secret123");

        var act = async () => await new GetFormShareByTokenQueryHandler(db).Handle(
            new GetFormShareByTokenQuery(share.Token, "wrong"), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("密码错误应拒绝");
    }

    [Fact]
    public async Task Submit_TokenNotFound_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();

        var act = async () => await new SubmitSharedFormCommandHandler(db).Handle(
            new SubmitSharedFormCommand("nope", "{}"), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>();
    }

    [Fact]
    public async Task Submit_Expired_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, BuildFlowSharePermission.Edit,
            expiresAt: DateTime.UtcNow.AddMinutes(-1));

        var act = async () => await new SubmitSharedFormCommandHandler(db).Handle(
            new SubmitSharedFormCommand(share.Token, "{}"), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("过期应拒绝");
    }

    [Fact]
    public async Task Submit_ReadOnlyPermission_ThrowsBusiness()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db);
        var share = await SeedShare(db, formId, BuildFlowSharePermission.View);

        var act = async () => await new SubmitSharedFormCommandHandler(db).Handle(
            new SubmitSharedFormCommand(share.Token, "{}"), CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>("只读分享不允许提交");
    }

    // 有效的 Formily Schema：顶层 object + properties，足以通过 SchemaValidator 与 FormDataValidator。
    private const string ValidFormSchema = "{\"type\":\"object\",\"properties\":{}}";

    [Fact]
    public async Task Submit_EditPermission_CreatesFormData()
    {
        await using var db = TestDbFactory.Create();
        var formId = await SeedFormDefinition(db, ValidFormSchema);
        var share = await SeedShare(db, formId, BuildFlowSharePermission.Edit);

        var instanceId = await new SubmitSharedFormCommandHandler(db).Handle(
            new SubmitSharedFormCommand(share.Token, "{}"), CancellationToken.None);

        instanceId.Should().NotBeEmpty();
        (await db.FormData.CountAsync()).Should().Be(1);
    }
}