using FluentAssertions;
using Workflow.Application.BuildFlow.Common.Services;
using Xunit;

namespace BuildFlow.Workflow.Tests.BuildFlow;

public class FormSchemaExcelServiceTests
{
    private static readonly string SampleSchema = """
    {
      "type": "object",
      "properties": {
        "name": { "type": "string", "title": "姓名", "required": true, "x-component": "Input" },
        "amount": { "type": "number", "title": "金额", "x-component": "InputNumber" },
        "approved": { "type": "boolean", "title": "是否通过", "x-component": "Switch" }
      }
    }
    """;

    private readonly FormSchemaExcelService _service = new();

    [Fact]
    public void BuildTemplate_ReturnsXlsxWithHeadersAndSampleRow()
    {
        var bytes = _service.BuildTemplate(SampleSchema, "测试表单");

        bytes.Should().NotBeNullOrEmpty();
        using var ms = new MemoryStream(bytes);
        using var wb = new ClosedXML.Excel.XLWorkbook(ms);
        var ws = wb.Worksheets.First();
        ws.Cell(1, 1).GetString().Should().Be("姓名");
        ws.Cell(1, 2).GetString().Should().Be("金额");
        ws.Cell(1, 3).GetString().Should().Be("是否通过");
        // 第二行应为示例值
        ws.Cell(2, 1).GetString().Should().NotBeNullOrEmpty();
    }

    [Fact]
    public void Parse_RoundTripsHeaderAndRowValues()
    {
        var templateBytes = _service.BuildTemplate(SampleSchema, "测试表单");
        // 用模版本身的示例行替换为真实数据后解析
        using var ms = new MemoryStream(templateBytes);
        using var wb = new ClosedXML.Excel.XLWorkbook(ms);
        var ws = wb.Worksheets.First();
        ws.Cell(2, 1).Value = "张三";
        ws.Cell(2, 2).Value = 100;
        ws.Cell(2, 3).Value = "true";
        using var outMs = new MemoryStream();
        wb.SaveAs(outMs);

        var rows = _service.Parse(SampleSchema, outMs.ToArray());

        rows.Should().HaveCount(1);
        var row = rows[0];
        row.RowNumber.Should().Be(2);
        // JSON 默认对非 ASCII 转义为 \uXXXX，验证 key 存在 + 张三的转义序列存在
        row.JsonObject.Should().Contain("name");
        row.JsonObject.Should().Contain("\\u5F20\\u4E09");
        // 必填字段已填，应无错误
        row.Errors.Should().BeEmpty();
    }

    [Fact]
    public void Parse_ReportsErrorWhenRequiredFieldEmpty()
    {
        var templateBytes = _service.BuildTemplate(SampleSchema, "测试表单");
        using var ms = new MemoryStream(templateBytes);
        using var wb = new ClosedXML.Excel.XLWorkbook(ms);
        var ws = wb.Worksheets.First();
        ws.Cell(2, 1).Value = string.Empty; // 姓名（必填）为空
        ws.Cell(2, 2).Value = 50;
        using var outMs = new MemoryStream();
        wb.SaveAs(outMs);

        var rows = _service.Parse(SampleSchema, outMs.ToArray());

        rows.Should().HaveCount(1);
        rows[0].Errors.Should().ContainSingle(e => e.Message.Contains("必填"));
    }

    [Fact]
    public void BuildExport_OutputsDataRowsByFieldOrder()
    {
        var dataRows = new[]
        {
            """{"name":"李四","amount":200,"approved":true}""",
            """{"name":"王五","amount":300,"approved":false}""",
        };

        var bytes = _service.BuildExport(SampleSchema, "测试表单", dataRows);

        using var ms = new MemoryStream(bytes);
        using var wb = new ClosedXML.Excel.XLWorkbook(ms);
        var ws = wb.Worksheets.First();
        ws.Cell(2, 1).GetString().Should().Be("李四");
        ws.Cell(3, 1).GetString().Should().Be("王五");
    }
}