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

namespace Novelly.Mcp.Tools;

[McpServerToolType]
public static class BeatTools
{
    [McpServerTool(Name = "get_chapter_outline")]
    [Description("Read a chapter's outline: its beats in order. Each beat is one row — a short "
                 + "title, who it belongs to, what happened, and what it sets up. The chapter's "
                 + "summary paragraph and drafted prose sit on the chapter itself, via get_chapter.")]
    public static Task<CallToolResult> GetChapterOutline(
        NovelApiClient api,
        [Description("The chapter's id.")] Guid chapterId,
        CancellationToken ct) =>
        api.GetAsync($"/api/chapters/{chapterId}/beats", ct);

    [McpServerTool(Name = "create_beat")]
    [Description("Add a beat to a chapter's outline. Keep the title to three to five words — it "
                 + "is a handle, not a sentence; detail belongs in whatHappened and whatsNext.")]
    public static Task<CallToolResult> CreateBeat(
        NovelApiClient api,
        [Description("The chapter's id.")] Guid chapterId,
        [Description("Three to five words naming the beat.")] string title,
        CancellationToken ct,
        [Description("Position in the chapter. Appended to the end when omitted.")] int? sortOrder = null,
        [Description("Ids of the characters whose beat this is.")] Guid[]? characterIds = null,
        [Description("The event itself.")] string? whatHappened = null,
        [Description("What it sets in motion — the hook into the next beat.")] string? whatsNext = null,
        [Description("Tags for cross-referencing. Unknown tags are created.")] string[]? tags = null) =>
        api.PostAsync($"/api/chapters/{chapterId}/beats",
            new { title, sortOrder, characterIds, whatHappened, whatsNext, tags }, ct);

    [McpServerTool(Name = "update_beat")]
    [Description("Revise a beat. Only the fields you supply change. Supplying a characterIds or "
                 + "tag list replaces the beat's characters or tags outright — pass an empty list "
                 + "to clear one, and include everything you want to keep.")]
    public static Task<CallToolResult> UpdateBeat(
        NovelApiClient api,
        [Description("The beat's id.")] Guid beatId,
        CancellationToken ct,
        [Description("Three to five words naming the beat.")] string? title = null,
        [Description("Position in the chapter.")] int? sortOrder = null,
        [Description("Ids of the characters whose beat this is. Replaces the existing list.")] Guid[]? characterIds = null,
        [Description("The event itself.")] string? whatHappened = null,
        [Description("What it sets in motion.")] string? whatsNext = null,
        [Description("Tags for cross-referencing. Replaces the existing tags.")] string[]? tags = null) =>
        api.PatchAsync($"/api/beats/{beatId}",
            new { title, sortOrder, characterIds, whatHappened, whatsNext, tags }, ct);

    [McpServerTool(Name = "delete_beat")]
    [Description("Remove a beat from a chapter's outline. Confirm with the writer first.")]
    public static Task<CallToolResult> DeleteBeat(
        NovelApiClient api,
        [Description("The beat's id.")] Guid beatId,
        CancellationToken ct) =>
        api.DeleteAsync($"/api/beats/{beatId}", ct);

    [McpServerTool(Name = "assign_character_to_beats")]
    [Description("Add a character to several beats at once. Leaves each beat's existing characters "
                 + "and other fields alone — this only adds, it never removes.")]
    public static Task<CallToolResult> AssignCharacterToBeats(
        NovelApiClient api,
        [Description("The chapter's id.")] Guid chapterId,
        [Description("Id of the character to add.")] Guid characterId,
        [Description("Ids of the beats to add the character to.")] Guid[] beatIds,
        CancellationToken ct) =>
        api.PostAsync($"/api/chapters/{chapterId}/beats/assign-character", new { characterId, beatIds }, ct);

    [McpServerTool(Name = "reorder_beats")]
    [Description("Renumber a chapter's beats to match the order given. List every beat id in the "
                 + "order wanted; any left out keep their relative position at the end.")]
    public static Task<CallToolResult> ReorderBeats(
        NovelApiClient api,
        [Description("The chapter's id.")] Guid chapterId,
        [Description("Beat ids in their new order.")] Guid[] beatIds,
        CancellationToken ct) =>
        api.PostAsync($"/api/chapters/{chapterId}/beats/reorder", new { beatIds }, ct);

    [McpServerTool(Name = "move_beats")]
    [Description("Move one or more beats from one chapter to another, appending them to the "
                 + "target chapter's end in the order given.")]
    public static Task<CallToolResult> MoveBeats(
        NovelApiClient api,
        [Description("The beats' current chapter id.")] Guid chapterId,
        [Description("Id of the chapter to move the beats into.")] Guid targetChapterId,
        [Description("Ids of the beats to move.")] Guid[] beatIds,
        CancellationToken ct) =>
        api.PostAsync($"/api/chapters/{chapterId}/beats/move", new { targetChapterId, beatIds }, ct);
}