using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.Json;

namespace WordVersioning.Api.IntegrationTests;

/// <summary>DTO ของ response ฝั่ง test — mirror ของ API (deserialize ด้วย camelCase เหมือนที่ API คืน)</summary>
public record UploadVersionResult(Guid VersionId, int VersionNumber, bool HasPdf);

public record DownloadLinkResult(string Url, DateTimeOffset ExpiresAt);

public record GenerateResult(Guid DocumentId, Guid VersionId, int VersionNumber, string DownloadUrl);

public record VersionItem(Guid VersionId, int VersionNumber, DateTimeOffset CreatedAt, string CreatedByUserId, string ContentHash, JsonElement? Fields, string? Message, bool HasPdf);

public record TemplateFieldItem(Guid Id, string Key, string Label, string Type, string Editor, bool IsRequired, int SortOrder);

public record CreateTemplateResult(Guid Id, List<TemplateFieldItem> Fields);

public record TemplateDetailResult(Guid Id, string Name, string? Description, bool IsActive, DateTimeOffset CreatedAt, DateTimeOffset UpdatedAt, List<TemplateFieldItem> Fields);

public record ReplaceFileResult(Guid Id, List<TemplateFieldItem> Fields, List<string> AddedTags, List<string> RemovedTags);

public record TemplateListItemResult(Guid Id, string Name, string? Description, bool IsActive, int FieldCount, DateTimeOffset CreatedAt, DateTimeOffset UpdatedAt);

public record TemplateDocItem(Guid DocumentId, string FileName, DateTimeOffset CreatedAt, int VersionCount, int LatestVersionNumber, DateTimeOffset? LatestVersionAt);

public record DocFieldItem(string Key, string? Label, string? Type, bool? IsRequired, string Value, Guid? SourceVersionId, string? UpdatedByUserId, DateTimeOffset? UpdatedAt);

public record DocDetail(Guid Id, string FileName, DateTimeOffset CreatedAt, Guid? TemplateId, string? TemplateName, bool TemplateIsActive, List<DocFieldItem> Fields);

public static class ApiExtensions
{
    /// <summary>multipart form ของ POST versions: file + clientVersionId + fields (option) + message (option)</summary>
    public static MultipartFormDataContent VersionForm(
        byte[] docx, string fileName, string clientVersionId, string? fieldsJson = null, string? message = null, byte[]? pdf = null)
    {
        var form = new MultipartFormDataContent();
        var file = new ByteArrayContent(docx);
        file.Headers.ContentType = new MediaTypeHeaderValue(TestDocx.DocxContentType);
        form.Add(file, "file", fileName);
        form.Add(new StringContent(clientVersionId), "clientVersionId");
        if (fieldsJson is not null)
            form.Add(new StringContent(fieldsJson), "fields");
        if (message is not null)
            form.Add(new StringContent(message), "message");
        if (pdf is not null)
        {
            var part = new ByteArrayContent(pdf);
            part.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
            form.Add(part, "pdf", "document.pdf");
        }
        return form;
    }

    /// <summary>multipart form ของ POST templates / PUT file: name + description (option) + file</summary>
    public static MultipartFormDataContent TemplateForm(
        byte[] docx, string name, string? description = null, string fileName = "template.docx")
    {
        var form = new MultipartFormDataContent();
        form.Add(new StringContent(name), "name");
        if (description is not null)
            form.Add(new StringContent(description), "description");
        var file = new ByteArrayContent(docx);
        file.Headers.ContentType = new MediaTypeHeaderValue(TestDocx.DocxContentType);
        form.Add(file, "file", fileName);
        return form;
    }

    public static async Task<T?> ReadJsonAsync<T>(this HttpResponseMessage response) =>
        response.Content.Headers.ContentType is null
            ? default
            : await response.Content.ReadFromJsonAsync<T>(IntegrationTestFixture.Json);
}