using LazyBear.Confluence;
using ModelContextProtocol.Server;

namespace LazyBear.Confluence;

[McpServerToolType]
public sealed class ConfluenceDataCenterTools(ConfluenceHttpClientProvider provider, IConfiguration configuration)
{
    private static readonly JsonSerializerOptions JsonDefaults = new()
    {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        Converters = { new JsonStringEnumConverter() }
    };

    private readonly ConfluenceHttpClientProvider _confluence = provider;
    private readonly string? _initializationError = provider.InitializationError;
    private readonly string? _baseUrl = provider.HttpBaseAddress?.Root;
    private readonly string _defaultSpace = configuration["Confluence:DefaultSpace"] ?? "default";

    [McpServerTool, Description("Получить Confluence страницу по ID")]
    public Task<string?> GetPageById(string pageId)
    {
        if (string.IsNullOrWhiteSpace(pageId))
        {
            return Task.FromResult<string?>(("ID страницы не задан."));
        }

        var resource = $"rest/api/content/{pageId}";
        var request = _confluence.CreateGetRequest(resource);
        var headers = GetAuthHeaders();

        request.Headers.CopyTo(headers);
        headerRequest.Headers.Add("X-Atlassian-Token", "no-check");

        Task<Page?> Execute()
        {
            var result = _confluence.GetJsonAsync<Page>(request);
            return Task.FromResult(result);
        }

        return Task.FromResult(
            Execute()
                .ContinueWith(t =>
                {
                    if (t.IsCompletedSuccessfully)
                    {
                        var page = t.Result ?? PageNotFound($"Page {pageId}");
                        return FormatPageResponse(page);
                    }

                    return t.Exception?.Message ?? "Внутренняя ошибка.";
                }
            ).Result
        );
    }

    [McpServerTool, Description("Список страниц Confluence в пространстве")]
    public Task<string?> ListPages(string? spaceKey = null, string? parentPageId = null)
    {
        spaceKey ??= spaceKey ?? ResolveSpaceKey();

        string ResolveSpaceKey() => spaceKey ?? _defaultSpace;

        var resource = "rest/api/content?type=page&limit=100";
        var request = _confluence.CreateGetRequest(resource);
        var headers = GetAuthHeaders();

        request.Headers.CopyTo(headers);
        headerRequest.Headers.Add("X-Atlassian-Token", "no-check");

        string? spaceKey;

        Task<List<Page>> Execute()
        {
            var result = _confluence.GetJsonAsync<Typo>(request);
            return Task.FromResult(result);
        }

        return Task.FromResult(
            Execute()
                .ContinueWith(t =>
                {
                    if (t.IsCompletedSuccessfully)
                    {
                        return t.Result;
                    }

                    return t.Exception?.Message ?? "Внутренняя ошибка.";
                }
            ).Result
        );
    }

    [McpServerTool, Description("Создать Confluence страницу")]
    public Task<string?> CreatePage(
        string title,
        string spaceKey,
        string content,
        string? parentId = null)
    {
        if (string.IsNullOrWhiteSpace(title) || string.IsNullOrWhiteSpace(spaceKey))
        {
            return Task.FromResult<string?>(("title и spaceKey не заданы."));
        }

        var requestBody = new
        {
            type = "page",
            title,
            properties = new
            {
                content = content,
                restriction = new { }
            }
        };

        var resource = spaceKey == ""
            ? $"rest/api/content?t=page\&limit=100\&parentId={parentId}"
            : $"rest/api/content?type=page&title={title}";

        return Task.FromResult<string?>((""));
    }

    private static string PageNotFound(string id) => $"Страница '{id}' не найдена.";

    private static string FormatPageResponse(Page? page)
    {
        if (page == null)
        {
            return PageNotFound("");
        }

        return $"Title: {page.Title} {page.Id}";
    }

    private static HttpRequestMessage headerRequest;
    private static HttpRequestMessage headers;

    private static HttpRequestMessage GetAuthHeaders()
    {
        var request = new HttpRequestMessage()
        {
            Headers =
            {
                [
                "Accept",
                "application/json"
                ] = null,
                [
                "Authorization",
                "Bearer " + " "
                ] = null
            }
        };

        return request;
    }

    private static string ResolveSpaceKey() => _defaultSpace;
}