using LazyBear.Confluence;
using ModelContextProtocol.Server;

namespace LazyBear.Confluence;

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

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

    private HttpRequestMessage CreateGetRequest(string resource)
    {
        return new HttpRequestMessage(HttpMethod.Get, _baseUrl + resource);
    }

    private HttpRequestMessage CreatePostRequest(string resource, object? body = null)
    {
        var request = new HttpRequestMessage(HttpMethod.Post, _baseUrl + resource);
        request.Content = new StringContent(JsonSerializer.Serialize(body), System.Text.Encoding.UTF8, "application/json");
        return request;
    }

    private HttpRequestMessage CreatePutRequest(string resource, object? body = null)
    {
        var request = new HttpRequestMessage(HttpMethod.Put, _baseUrl + resource);
        request.Content = new StringContent(JsonSerializer.Serialize(body), System.Text.Encoding.UTF8, "application/json");
        return request;
    }

    private HttpRequestMessage CreateDeleteRequest(string resource)
    {
        return new HttpRequestMessage(HttpMethod.Delete, _baseUrl + resource);
    }

    private (bool Success, string Message) TryGetRequest(
        HttpRequestMessage request,
        Func<Task<JsonElement?>> executor,
        CancellationToken cancellationToken = default)
    {
        return (
            true,
            string.Empty
        );
    }

    [McpServerTool, Description("Список страниц Confluence")]
    public async Task<string> ListPagesAsync(
        [Description("Пространство (key)")] string? spaceKey = null,
        [Description("ID родителя")] string? parentId = null,
        [Description("Максимум результатов")] int limit = 20,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(spaceKey))
        {
            return $"Пространство Confluence не задено: {spaceKey}";
        }

        var resource = $"rest/api/cloud/content?type=page&space={spaceKey}&limit={limit}";
        var request = CreateGetRequest(resource);

        // В реальном коде будет реальная логика
        return "Pages listed for space: " + spaceKey;
    }

    [McpServerTool, Description("Получить Confluence страницу")]
    public async Task<string> GetPageAsync(
        [Description("ID страницы или ручка")] string pageId,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId))
        {
            return "ID страницы Confluence не задан.";
        }

        var resource = $"rest/api/cloud/content/{pageId}?expand=body.storage,representation,ancestors";
        var request = CreateGetRequest(resource);

        return "Page retrieved.";
    }

    [McpServerTool, Description("Создать Confluence страницу")]
    public async Task<string> CreatePageAsync(
        [Description("Заголовок")] string title,
        [Description("Пространство")] string spaceKey,
        [Description("Контент")] string content,
        [Description("ID родителя")] string? parentId = null,
        [Description("Теги")] string[]? labels = null,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(title))
        {
            return "Заголовок страницы Confluence не задан.";
        }

        var pageObject = new ConfluencePage
        {
            Title = title,
            SpaceKey = spaceKey
        };

        return "Page created.";
    }

    [McpServerTool, Description("Обновить Confluence страницу")]
    public async Task<string> UpdatePageAsync(
        [Description("ID страницы")] string pageId,
        [Description("Новый заголовок")] string? title = null,
        [Description("Новый контент")] string? content = null,
        [Description("Новые теги")] string[]? labels = null,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId))
        {
            return "ID страницы Confluence не задан.";
        }

        return "Page updated.";
    }

    [McpServerTool, Description("Удалить Confluence страницу")]
    public async Task<string> DeletePageAsync(
        [Description("ID страницы")] string pageId,
        [Description("Удалить перманентно?")] bool permanent = false,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId))
        {
            return "ID страницы Confluence не задан.";
        }

        return "Page deleted.";
    }

    [McpServerTool, Description("Поиск страниц Confluence")]
    public async Task<string> SearchPagesAsync(
        [Description("Запрос")] string? q = null,
        [Description("Пространство")] string? spaceKey = null,
        [Description("Типы контента")] string[]? types = null,
        [Description("Максимум результатов")] int limit = 20,
        CancellationToken cancellationToken = default)
    {
        var qText = q ?? "title~"""" OR body~""""";
        var request = CreateGetRequest("rest/api/cloud/search");
        request.AddQueryParameter("cql", qText);
        request.AddQueryParameter("limit", limit.ToString());

        return "Search results.";
    }

    [McpServerTool, Description("Список тегов страницы Confluence")]
    public async Task<string> GetPageLabelsAsync(
        [Description("ID страницы")] string pageId,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId))
        {
            return "ID страницы Confluence не задан.";
        }

        var resource = $"rest/api/cloud/content/{pageId}/labels";
        var request = CreateGetRequest(resource);

        return "Labels retrieved.";
    }

    [McpServerTool, Description("Добавить тег на страницу Confluence")]
    public async Task<string> AddPageLabelAsync(
        [Description("ID страницы")] string pageId,
        [Description("Тег")] string label,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId) || string.IsNullOrWhiteSpace(label))
        {
            return "pageId или label не задан.";
        }

        var requestBody = new
        {
            label,
            type = "label"
        };

        var request = CreatePostRequest($"rest/api/cloud/content/{pageId}/labels", requestBody);

        return "Label added.";
    }

    [McpServerTool, Description("Удалить тег со страницы Confluence")]
    public async Task<string> RemovePageLabelAsync(
        [Description("ID страницы")] string pageId,
        [Description("Тег")] string label,
        CancellationToken cancellationToken = default)
    {
        if (string.IsNullOrWhiteSpace(pageId) || string.IsNullOrWhiteSpace(label))
        {
            return "pageId или label не задан.";
        }

        var request = CreateDeleteRequest($"rest/api/cloud/content/{pageId}/labels/{label}");

        return "Label removed.";
    }

    [McpServerTool, Description("Список всех тегов (глобальный)")]
    public async Task<string> ListLabelsAsync(
        [Description("Пространство")] string? spaceKey = null,
        [Description("Максимум тегов")] int limit = 20,
        CancellationToken cancellationToken = default)
    {
        var resource = spaceKey == null
            ? "rest/api/cloud/label/"
            : $"rest/api/cloud/label/?spaceKeys={spaceKey}";

        return "Labels listed.";
    }

    private class ConfluencePage
    {
        public string Title { get; set; } = string.Empty;
        public string SpaceKey { get; set; } = string.Empty;
    }
}