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

namespace BuildFlow.Scripting.Tests;

/// <summary>
/// scripting 模块命令处理器测试（架构护栏：每个 Handler 至少 1 个测试）。
/// DisableScriptCommandHandler：真实 InMemory 覆盖成功置 Disabled 与不存在→NotFound。
/// TestScriptCommandHandler / InvokeScriptCommandHandler：仅委托 IScriptExecutionService，
/// 不触发真实 Roslyn 编译执行（依赖编译/沙箱执行，需集成环境），故用 NSubstitute 桩验证委托
/// 把请求正确转发给 ExecuteTestAsync / ExecuteByNameAsync 并返回其结果。
/// </summary>
public class ScriptCommandEdgeHandlerTests
{
    // ── DisableScript ──────────────────────────────────────────────────────

    [Fact]
    public async Task DisableScript_Published_SetsDisabledAndPersists()
    {
        await using var db = ScriptingTestDbFactory.Create();
        var script = await SeedScriptAsync(db, "disable-fn", ScriptStatusEnum.Published);
        var handler = new DisableScriptCommandHandler(db);

        var dto = await handler.Handle(new DisableScriptCommand(script.Id), CancellationToken.None);

        dto.Status.Should().Be(ScriptStatusEnum.Disabled);
        var entity = await db.Scripts.FindAsync(script.Id);
        entity.Should().NotBeNull();
        entity!.Status.Should().Be(ScriptStatusEnum.Disabled);
    }

    [Fact]
    public async Task DisableScript_NotFound_Throws()
    {
        await using var db = ScriptingTestDbFactory.Create();
        var handler = new DisableScriptCommandHandler(db);

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

        var ex = await act.Should().ThrowAsync<BusinessException>();
        ex.Which.Code.Should().Be(ErrorCode.NotFound);
    }

    // ── TestScript（委托执行服务，前置分支无校验，仅验证委托） ───────────────

    [Fact]
    public async Task TestScript_DelegatesToService_ReturnsResult()
    {
        var svc = Substitute.For<IScriptExecutionService>();
        var expected = new ScriptExecutionResult(ScriptExecutionStatusEnum.Success, "42", null, 7);
        var req = new TestScriptCommand(Guid.NewGuid(), "{\"x\":1}");
        svc.ExecuteTestAsync(req.Id, req.InputJson, Arg.Any<CancellationToken>()).Returns(expected);
        var handler = new TestScriptCommandHandler(svc);

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

        result.Should().Be(expected);
        await svc.Received(1).ExecuteTestAsync(req.Id, req.InputJson, Arg.Any<CancellationToken>());
    }

    // ── InvokeScript（委托执行服务，仅 Published 可调用由服务守卫） ──────────

    [Fact]
    public async Task InvokeScript_DelegatesToService_ReturnsResult()
    {
        var svc = Substitute.For<IScriptExecutionService>();
        var expected = new ScriptExecutionResult(ScriptExecutionStatusEnum.Success, "99", null, 3);
        var req = new InvokeScriptCommand("my-script", "{}");
        svc.ExecuteByNameAsync(req.Name, req.InputJson, Arg.Any<CancellationToken>()).Returns(expected);
        var handler = new InvokeScriptCommandHandler(svc);

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

        result.Should().Be(expected);
        await svc.Received(1).ExecuteByNameAsync(req.Name, req.InputJson, Arg.Any<CancellationToken>());
    }

    // ── 夹具 ───────────────────────────────────────────────────────────────

    private static async Task<ScriptFunctionEntity> SeedScriptAsync(
        ScriptingDbContext db,
        string name,
        ScriptStatusEnum status = ScriptStatusEnum.Draft)
    {
        var script = new ScriptFunctionEntity
        {
            Id = Guid.NewGuid(),
            Name = name,
            DisplayName = name,
            Code = "return 1;",
            Status = status,
            Version = 1,
            TimeoutMs = 5000,
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        };
        db.Scripts.Add(script);
        await db.SaveChangesAsync();
        return script;
    }
}