"""Rulebook / topic REST endpoints.

Wraps services/rulebooks.py. Standard Scribe auth: g.user.id is the
authenticated owner; the service enforces ownership scoping.
"""
from __future__ import annotations

from quart import Blueprint, g, jsonify, request

from fabledassistant.auth import login_required
import fabledassistant.services.rulebooks as rulebooks_svc

rulebooks_bp = Blueprint("rulebooks", __name__, url_prefix="/api")


def _uid() -> int:
    return g.user.id


# ── Rulebooks ───────────────────────────────────────────────────────────

@rulebooks_bp.get("/rulebooks")
@login_required
async def list_rulebooks():
    rows = await rulebooks_svc.list_rulebooks(_uid())
    return jsonify({"rulebooks": [rb.to_dict() for rb in rows]})


@rulebooks_bp.post("/rulebooks")
@login_required
async def create_rulebook():
    data = await request.get_json() or {}
    title = (data.get("title") or "").strip()
    if not title:
        return jsonify({"error": "title is required"}), 400
    rb = await rulebooks_svc.create_rulebook(
        user_id=_uid(),
        title=title,
        description=data.get("description", ""),
    )
    return jsonify(rb.to_dict()), 201


@rulebooks_bp.get("/rulebooks/<int:rulebook_id>")
@login_required
async def get_rulebook(rulebook_id: int):
    rb = await rulebooks_svc.get_rulebook(rulebook_id, _uid())
    if rb is None:
        return jsonify({"error": "rulebook not found"}), 404
    return jsonify(rb.to_dict())


@rulebooks_bp.patch("/rulebooks/<int:rulebook_id>")
@login_required
async def update_rulebook(rulebook_id: int):
    data = await request.get_json() or {}
    fields = {k: v for k, v in data.items() if k in ("title", "description")}
    rb = await rulebooks_svc.update_rulebook(rulebook_id, _uid(), **fields)
    if rb is None:
        return jsonify({"error": "rulebook not found"}), 404
    return jsonify(rb.to_dict())


@rulebooks_bp.delete("/rulebooks/<int:rulebook_id>")
@login_required
async def delete_rulebook(rulebook_id: int):
    await rulebooks_svc.delete_rulebook(rulebook_id, _uid())
    return "", 204


# ── Topics ──────────────────────────────────────────────────────────────

@rulebooks_bp.get("/rulebooks/<int:rulebook_id>/topics")
@login_required
async def list_topics(rulebook_id: int):
    try:
        rows = await rulebooks_svc.list_topics(rulebook_id, _uid())
    except ValueError as exc:
        return jsonify({"error": str(exc)}), 404
    return jsonify({"topics": [t.to_dict() for t in rows]})


@rulebooks_bp.post("/rulebooks/<int:rulebook_id>/topics")
@login_required
async def create_topic(rulebook_id: int):
    data = await request.get_json() or {}
    title = (data.get("title") or "").strip()
    if not title:
        return jsonify({"error": "title is required"}), 400
    try:
        topic = await rulebooks_svc.create_topic(
            rulebook_id=rulebook_id,
            user_id=_uid(),
            title=title,
            description=data.get("description", ""),
            order_index=data.get("order_index", 0),
        )
    except ValueError as exc:
        return jsonify({"error": str(exc)}), 404
    return jsonify(topic.to_dict()), 201


@rulebooks_bp.patch("/rulebook-topics/<int:topic_id>")
@login_required
async def update_topic(topic_id: int):
    data = await request.get_json() or {}
    fields = {
        k: v for k, v in data.items()
        if k in ("title", "description", "order_index")
    }
    topic = await rulebooks_svc.update_topic(topic_id, _uid(), **fields)
    if topic is None:
        return jsonify({"error": "topic not found"}), 404
    return jsonify(topic.to_dict())


@rulebooks_bp.delete("/rulebook-topics/<int:topic_id>")
@login_required
async def delete_topic(topic_id: int):
    await rulebooks_svc.delete_topic(topic_id, _uid())
    return "", 204