using System.ComponentModel;
using ModelContextProtocol.Protocol;
using ModelContextProtocol.Server;

namespace Novelly.Mcp.Tools;

[McpServerToolType]
public static class QuestionTools
{
    [McpServerTool(Name = "list_open_questions")]
    [Description("The decisions the writer has not made yet, newest first. Read this before "
                 + "proposing changes — an open question marks somewhere the writer is still "
                 + "thinking, not a gap to fill in for them.")]
    public static Task<CallToolResult> ListOpenQuestions(
        NovelApiClient api,
        [Description("The novel's id.")] Guid novelId,
        CancellationToken ct,
        [Description("Narrow to questions about one chapter outline.")] Guid? chapterId = null,
        [Description("Narrow to questions about one character.")] Guid? characterId = null,
        [Description("Include questions already settled. Defaults to false.")] bool includeResolved = false)
    {
        var query = new List<string> { $"includeResolved={includeResolved.ToString().ToLowerInvariant()}" };

        if (chapterId is { } chapter)
        {
            query.Add($"chapterId={chapter}");
        }

        if (characterId is { } character)
        {
            query.Add($"characterId={character}");
        }

        return api.GetAsync($"/api/novels/{novelId}/questions?{string.Join('&', query)}", ct);
    }

    [McpServerTool(Name = "raise_open_question")]
    [Description("Record a question the writer has not settled, attached to the chapter outline "
                 + "and/or the character it is about. Prefer raising a question over guessing.")]
    public static Task<CallToolResult> RaiseOpenQuestion(
        NovelApiClient api,
        [Description("The novel's id.")] Guid novelId,
        [Description("The question, in one line.")] string question,
        CancellationToken ct,
        [Description("The thinking around it — options considered, and what each costs.")] string? detail = null,
        [Description("Id of the chapter outline this is about, if any.")] Guid? chapterId = null,
        [Description("Id of the character this is about, if any.")] Guid? characterId = null) =>
        api.PostAsync($"/api/novels/{novelId}/questions",
            new { question, detail, chapterId, characterId }, ct);

    [McpServerTool(Name = "update_open_question")]
    [Description("Revise a question or change what it is attached to. Only the fields you supply change.")]
    public static Task<CallToolResult> UpdateOpenQuestion(
        NovelApiClient api,
        [Description("The question's id.")] Guid questionId,
        CancellationToken ct,
        [Description("New wording for the question.")] string? question = null,
        [Description("New detail. Pass an empty string to clear it.")] string? detail = null,
        [Description("Attach to this chapter outline.")] Guid? chapterId = null,
        [Description("Attach to this character.")] Guid? characterId = null,
        [Description("Detach from its chapter.")] bool clearChapter = false,
        [Description("Detach from its character.")] bool clearCharacter = false) =>
        api.PatchAsync($"/api/questions/{questionId}",
            new { question, detail, chapterId, characterId, clearChapter, clearCharacter }, ct);

    [McpServerTool(Name = "resolve_open_question")]
    [Description("Settle a question with what the writer decided. Set appendToNotes to also write "
                 + "the resolution into the notes of the chapter and character it hangs off.")]
    public static Task<CallToolResult> ResolveOpenQuestion(
        NovelApiClient api,
        [Description("The question's id.")] Guid questionId,
        [Description("What was decided.")] string resolution,
        CancellationToken ct,
        [Description("Also append the resolution to the associated notes.")] bool appendToNotes = false) =>
        api.PostAsync($"/api/questions/{questionId}/resolve", new { resolution, appendToNotes }, ct);

    [McpServerTool(Name = "reopen_question")]
    [Description("Put a resolved question back on the list. Anything already appended to notes stays.")]
    public static Task<CallToolResult> ReopenQuestion(
        NovelApiClient api,
        [Description("The question's id.")] Guid questionId,
        CancellationToken ct) =>
        api.PostAsync($"/api/questions/{questionId}/reopen", new { }, ct);

    [McpServerTool(Name = "delete_open_question")]
    [Description("Delete a question outright. Resolving is usually better — it keeps the decision.")]
    public static Task<CallToolResult> DeleteOpenQuestion(
        NovelApiClient api,
        [Description("The question's id.")] Guid questionId,
        CancellationToken ct) =>
        api.DeleteAsync($"/api/questions/{questionId}", ct);
}