using System.Net;
using System.Net.Http.Json;

namespace WordVersioning.Api.IntegrationTests;

/// <summary>setup ที่ใช้ร่วมกันหลาย test class: สร้าง template + ตั้ง field definitions ครบชุด
/// (employee_name = required text, position = text, salary = number, start_date = date)</summary>
public static class TestFlow
{
    public static readonly Dictionary<string, string> DefaultValues = new()
    {
        ["employee_name"] = "สมหญิง รักงาน",
        ["position"] = "วิศวกรซอฟต์แวร์",
        ["salary"] = "75000",
        ["start_date"] = "2026-08-01",
    };

    public static async Task<(Guid TemplateId, List<TemplateFieldItem> Fields)> CreateConfiguredTemplateAsync(
        HttpClient client, string baseName)
    {
        // create (detect defaults)
        using var create = await client.PostAsync(
            "api/templates", ApiExtensions.TemplateForm(TestDocx.BuildTemplateDocx(), $"{baseName} {Guid.NewGuid():N}"));
        create.EnsureSuccessStatusCode();
        var created = await create.Content.ReadFromJsonAsync<CreateTemplateResult>(IntegrationTestFixture.Json);

        // ตั้ง label/type/required ให้ครบทุกรูปแบบ (มี required, number, date)
        using var put = await client.PutAsJsonAsync($"api/templates/{created!.Id}", new
        {
            fields = created.Fields.Select(f => new
            {
                key = f.Key,
                label = LabelOf(f.Key),
                type = TypeOf(f.Key),
                isRequired = f.Key == "employee_name",
                sortOrder = f.SortOrder,
            }),
        }, IntegrationTestFixture.Json);
        put.EnsureSuccessStatusCode();
        var detail = await put.Content.ReadFromJsonAsync<TemplateDetailResult>(IntegrationTestFixture.Json);

        return (created.Id, detail!.Fields);
    }

    /// <summary>generate เอกสาร v1 จาก template ที่ตั้งค่าแล้ว — คืน response ของ generate</summary>
    public static Task<GenerateResult> GenerateDocumentAsync(HttpClient client, Guid templateId) =>
        GenerateDocumentAsync(client, templateId, DefaultValues);

    /// <summary>generate พร้อมค่าที่กำหนดเอง (ทดสอบ validation หรือค่าเกินนิยาม)
    /// + commit message ทางเลือก (FR-13)</summary>
    public static async Task<GenerateResult> GenerateDocumentAsync(
        HttpClient client, Guid templateId, Dictionary<string, string> values, string? message = null)
    {
        using var response = await client.PostAsJsonAsync(
            "api/documents/generate", new { templateId, values, message }, IntegrationTestFixture.Json);
        Assert.Equal(HttpStatusCode.Created, response.StatusCode);
        return (await response.Content.ReadFromJsonAsync<GenerateResult>(IntegrationTestFixture.Json))!;
    }

    public static string LabelOf(string key) => key switch
    {
        "employee_name" => "ชื่อพนักงาน",
        "position" => "ตำแหน่ง",
        "salary" => "เงินเดือน",
        "start_date" => "วันเริ่มงาน",
        _ => key,
    };

    public static string TypeOf(string key) => key switch
    {
        "salary" => "number",
        "start_date" => "date",
        _ => "text",
    };
}