using System.ComponentModel;
using System.Net.Http.Json;
using System.Text.Json;
using ModelContextProtocol.Server;

namespace TaskTracker.MCP.Tools;

[McpServerToolType]
public sealed class TaskTools
{
    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        WriteIndented = true
    };

    [McpServerTool, Description("Get the currently active work task with its latest notes and recent context events")]
    public static async Task<string> GetActiveTask(HttpClient client)
    {
        var response = await client.GetAsync("/api/tasks/active");
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("List work tasks, optionally filtered by status (Pending, Active, Paused, Completed, Abandoned)")]
    public static async Task<string> ListTasks(
        HttpClient client,
        [Description("Filter by status: Pending, Active, Paused, Completed, Abandoned")] string? status = null)
    {
        var url = "/api/tasks";
        if (!string.IsNullOrEmpty(status))
            url += $"?status={status}";

        var response = await client.GetAsync(url);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Create a new work task")]
    public static async Task<string> CreateTask(
        HttpClient client,
        [Description("Title of the task")] string title,
        [Description("Optional description")] string? description = null,
        [Description("Optional category (e.g. Engineering, Email, LaserCutting)")] string? category = null)
    {
        var payload = new { title, description, category };
        var response = await client.PostAsJsonAsync("/api/tasks", payload, JsonOptions);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Start/activate a task by ID. Automatically pauses any currently active task.")]
    public static async Task<string> StartTask(
        HttpClient client,
        [Description("The task ID to start")] int taskId)
    {
        var response = await client.PutAsync($"/api/tasks/{taskId}/start", null);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Pause a task with an optional note about why it was paused")]
    public static async Task<string> PauseTask(
        HttpClient client,
        [Description("The task ID to pause")] int taskId,
        [Description("Optional note about why the task is being paused")] string? note = null)
    {
        var payload = new { note };
        var response = await client.PutAsJsonAsync($"/api/tasks/{taskId}/pause", payload, JsonOptions);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Resume a paused task with an optional note about context for resuming")]
    public static async Task<string> ResumeTask(
        HttpClient client,
        [Description("The task ID to resume")] int taskId,
        [Description("Optional note about context for resuming")] string? note = null)
    {
        var payload = new { note };
        var response = await client.PutAsJsonAsync($"/api/tasks/{taskId}/resume", payload, JsonOptions);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Mark a task as complete")]
    public static async Task<string> CompleteTask(
        HttpClient client,
        [Description("The task ID to complete")] int taskId)
    {
        var response = await client.PutAsync($"/api/tasks/{taskId}/complete", null);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Add a note to a task")]
    public static async Task<string> AddNote(
        HttpClient client,
        [Description("The task ID")] int taskId,
        [Description("The note content")] string content,
        [Description("Note type: General, PauseNote, or ResumeNote")] string type = "General")
    {
        var payload = new { content, type };
        var response = await client.PostAsJsonAsync($"/api/tasks/{taskId}/notes", payload, JsonOptions);
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Get a summary of recent window/browser activity grouped by application, useful for understanding what the user has been working on")]
    public static async Task<string> GetContextSummary(HttpClient client)
    {
        var response = await client.GetAsync("/api/context/summary");
        return await response.Content.ReadAsStringAsync();
    }

    [McpServerTool, Description("Get raw context events (window switches, browser navigations) from the last N minutes")]
    public static async Task<string> GetRecentContext(
        HttpClient client,
        [Description("Number of minutes to look back (default 30)")] int minutes = 30)
    {
        var response = await client.GetAsync($"/api/context/recent?minutes={minutes}");
        return await response.Content.ReadAsStringAsync();
    }
}