using FluentAssertions;
using BuildFlow.Shared.Domain.Common;
using Microsoft.EntityFrameworkCore;
using NSubstitute;
using Scripting.Application.DTOs;
using Scripting.Application.Services;
using Scripting.Domain.Entities.ScriptFunction;
using Scripting.Domain.Enums;
using Scripting.Infrastructure.Persistence;
using Workflow.Application.BuildFlow.Buttons.Commands;
using Workflow.Application.BuildFlow.Buttons.Handlers;
using Workflow.Application.BuildFlow.Buttons.Services;
using Workflow.Domain.Entities;
using Workflow.Domain.Enums;
using Xunit;

namespace BuildFlow.Workflow.Tests.BuildFlow;

/// <summary>
/// 按钮动作链测试，约束按钮配置驱动后端动作执行，而不是前端写死行为。
/// </summary>
public class BuildFlowButtonActionTests
{
    [Fact]
    public async Task CreateButtonDefinition_PersistsActionMetadata()
    {
        await using var db = TestDbFactory.Create();
        var handler = new CreateBuildFlowButtonDefinitionCommandHandler(db);

        var button = await handler.Handle(
            new CreateBuildFlowButtonDefinitionCommand(
                null,
                null,
                null,
                null,
                "submit",
                "提交",
                "send",
                BuildFlowButtonPlacement.FormToolbar,
                "form:submit",
                null,
                null,
                """{"title":"确认提交？"}""",
                null,
                """[]""",
                null,
                10),
            CancellationToken.None);

        button.Code.Should().Be("submit");
        button.PermissionCode.Should().Be("form:submit");
        button.Status.Should().Be(BuildFlowMetadataStatus.Draft);
    }

    [Fact]
    public async Task PublishButtonDefinition_ShouldMakeButtonExecutableByRuntime()
    {
        await using var db = TestDbFactory.Create();
        var button = CreateButton();
        button.Status = BuildFlowMetadataStatus.Draft;
        db.BuildFlowButtons.Add(button);
        await db.SaveChangesAsync();

        var handler = new PublishBuildFlowButtonDefinitionCommandHandler(db);

        var result = await handler.Handle(
            new PublishBuildFlowButtonDefinitionCommand(button.Id),
            CancellationToken.None);

        result.Status.Should().Be(BuildFlowMetadataStatus.Published);
        (await db.BuildFlowButtons.FindAsync(button.Id))!.Status
            .Should().Be(BuildFlowMetadataStatus.Published);
    }

    [Fact]
    public async Task DisableButtonDefinition_ShouldRemoveButtonFromRuntime()
    {
        await using var db = TestDbFactory.Create();
        var button = CreateButton();
        db.BuildFlowButtons.Add(button);
        await db.SaveChangesAsync();

        var handler = new DisableBuildFlowButtonDefinitionCommandHandler(db);

        var result = await handler.Handle(
            new DisableBuildFlowButtonDefinitionCommand(button.Id),
            CancellationToken.None);

        result.Status.Should().Be(BuildFlowMetadataStatus.Disabled);
        (await db.BuildFlowButtons.FindAsync(button.Id))!.Status
            .Should().Be(BuildFlowMetadataStatus.Disabled);
    }

    // ── T6 回归：执行器已改造为依赖 IScriptExecutionService + ScriptingDbContext ───

    /// <summary>
    /// 回归测试（spec §13 #7 按钮动作链）：runFunction 动作通过 IScriptExecutionService 执行脚本。
    /// 验证 T6 的 rewiring 后执行器正确委托给新的脚本执行服务，且返回成功结果。
    /// </summary>
    [Fact]
    public async Task ExecuteAsync_RunFunctionAction_ExecutesScriptViaService()
    {
        // Setup: WorkflowDbContext（InMemory）+ ScriptingDbContext（InMemory）+ Mock IScriptExecutionService
        await using var wfDb = TestDbFactory.Create();
        await using var scriptingDb = CreateScriptingDb();

        var scriptId = Guid.NewGuid();
        // 脚本需存在（执行器 EnsureFunctionScopeAsync 会查 ScriptingDbContext）
        scriptingDb.Scripts.Add(new ScriptFunctionEntity
        {
            Id = scriptId,
            Name = "calc",
            DisplayName = "计算",
            Code = "return 1;",
            Status = ScriptStatusEnum.Published,
            TimeoutMs = 5000,
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
        await scriptingDb.SaveChangesAsync();

        var buttonId = Guid.NewGuid();
        wfDb.BuildFlowButtons.Add(new BuildFlowButtonDefinition
        {
            Id = buttonId,
            Code = "run",
            Label = "运行脚本",
            Placement = BuildFlowButtonPlacement.FormToolbar,
            Status = BuildFlowMetadataStatus.Published,
            // 无 PermissionCode → 跳过权限校验，专注验证执行链路
            ActionsJson = $$"""
            [
              {
                "type": "runFunction",
                "target": "{{scriptId}}",
                "params": { "amount": "$input.amount" }
              }
            ]
            """,
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
        await wfDb.SaveChangesAsync();

        // Mock 执行服务：返回已知成功结果，并记录被调用的 scriptId + inputJson
        var execService = Substitute.For<IScriptExecutionService>();
        execService.ExecuteByIdAsync(
                scriptId,
                Arg.Is<string>(j => j.Contains("\"amount\":100")),
                Arg.Any<CancellationToken>())
            .Returns(new ScriptExecutionResult(
                ScriptExecutionStatusEnum.Success, "100", null, 5, null));

        var executor = new BuildFlowButtonActionExecutor(wfDb, scriptingDb, execService);

        var result = await executor.ExecuteAsync(buttonId, """{"amount":100}""", CancellationToken.None);

        // 断言：执行服务被正确调用，按钮执行返回成功
        result.Success.Should().BeTrue();
        await execService.Received(1).ExecuteByIdAsync(
            scriptId,
            Arg.Is<string>(j => j.Contains("\"amount\":100")),
            Arg.Any<CancellationToken>());
        // 整体执行日志应写入 WorkflowDbContext
        (await wfDb.BuildFlowActionExecutionLogs.CountAsync()).Should().Be(1);
    }

    /// <summary>未发布按钮不可执行（状态守卫）。</summary>
    [Fact]
    public async Task ExecuteAsync_DraftButton_ThrowsBusinessException()
    {
        await using var wfDb = TestDbFactory.Create();
        await using var scriptingDb = CreateScriptingDb();
        var execService = Substitute.For<IScriptExecutionService>();

        var buttonId = Guid.NewGuid();
        wfDb.BuildFlowButtons.Add(new BuildFlowButtonDefinition
        {
            Id = buttonId,
            Code = "draft-btn",
            Label = "草稿按钮",
            Placement = BuildFlowButtonPlacement.FormToolbar,
            Status = BuildFlowMetadataStatus.Draft, // 未发布
            ActionsJson = "[]",
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
        await wfDb.SaveChangesAsync();

        var executor = new BuildFlowButtonActionExecutor(wfDb, scriptingDb, execService);

        var act = () => executor.ExecuteAsync(buttonId, "{}", CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>().WithMessage("*未发布*");
        // 执行服务不应被调用
        await execService.DidNotReceiveWithAnyArgs().ExecuteByIdAsync(default, default!, default);
    }

    // 注：原 7 个 BuildFlowButtonActionExecutor 执行器用例（基于已删除的 CustomFunctionExecutionService 链路）
    // 已在 T6 删除。上方两个用例基于新的 IScriptExecutionService 链路重写，作为动作链回归覆盖。

    private static BuildFlowButtonDefinition CreateButton()
        => new()
        {
            Id = Guid.NewGuid(),
            Code = "submit-and-run",
            Label = "提交并计算",
            Placement = BuildFlowButtonPlacement.FormToolbar,
            Status = BuildFlowMetadataStatus.Published,
            ActionsJson = """
            [
              {
                "type": "runFunction",
                "target": "00000000-0000-0000-0000-000000000001",
                "params": { "amount": "$input.amount" },
                "runPolicy": "stopOnFailure"
              }
            ]
            """,
        };

    /// <summary>新建带审计模拟的 InMemory ScriptingDbContext（镜像 Scripting.Tests 模式）。</summary>
    private static ScriptingDbContext CreateScriptingDb()
    {
        var options = new DbContextOptionsBuilder<ScriptingDbContext>()
            .UseInMemoryDatabase($"wf-scripting-test-{Guid.NewGuid()}")
            .Options;
        // 传入测试用户上下文以激活 AuditInterceptor，自动填充审计字段
        return new ScriptingDbContext(options, new TestCurrentUserContext());
    }

    private sealed class TestCurrentUserContext : ICurrentUserContext
    {
        public string UserId => "test-user";
        public string IPAddress => "127.0.0.1";
    }
}