"""Routes for the core tunes table."""
from flask import Blueprint, jsonify, request
from app.extensions import db
from app.models import Tune, TuneByInstrument, TuneNote, Reference, Musician
from app.auth import require_api_key

tunes_bp = Blueprint("tunes", __name__, url_prefix="/tunes")


# ---------------------------------------------------------------------------
# List / filter
# ---------------------------------------------------------------------------
@tunes_bp.get("/")
def list_tunes():
    """
    Query params (all optional, combinable):
      instrument_id=1
      key=D
      tuning_id=1
      status=callable|review|to_learn
      difficulty=easy|hard
      modal=true|false
      source_id=1
      search=<substring match on name>
    """
    q = db.session.query(Tune)

    search = request.args.get("search")
    if search:
        q = q.filter(Tune.name.ilike(f"%{search}%"))

    key = request.args.get("key")
    if key:
        q = q.filter(Tune.key.ilike(key))

    modal = request.args.get("modal")
    if modal is not None:
        q = q.filter(Tune.modal == (modal.lower() in ("true", "1", "yes")))

    source_id = request.args.get("source_id")
    if source_id:
        q = q.filter(Tune.source_id == int(source_id))

    instrument_id = request.args.get("instrument_id")
    tuning        = request.args.get("tuning")
    status        = request.args.get("status")
    difficulty    = request.args.get("difficulty")

    if any([instrument_id, tuning, status, difficulty]):
        q = q.join(Tune.instruments)
        if instrument_id:
            q = q.filter(TuneByInstrument.instrument_id == int(instrument_id))
        if tuning:
            q = q.filter(TuneByInstrument.tuning_id == int(tuning))
        if status:
            q = q.filter(TuneByInstrument.status == status)
        if difficulty:
            q = q.filter(TuneByInstrument.difficulty.ilike(difficulty))

    tunes = q.order_by(Tune.name).all()
    return jsonify([t.to_dict() for t in tunes])


# ---------------------------------------------------------------------------
# Get single tune
# ---------------------------------------------------------------------------
@tunes_bp.get("/<int:tune_id>")
def get_tune(tune_id):
    tune = db.get_or_404(Tune, tune_id)
    return jsonify(tune.to_dict())


# ---------------------------------------------------------------------------
# Create tune (with optional nested instruments / notes / references)
# ---------------------------------------------------------------------------
@tunes_bp.post("/")
@require_api_key
def create_tune():
    data = request.get_json(force=True)

    tune = Tune(
        name=data.get("name"),
        key=data.get("key"),
        modal=data.get("modal"),
        source_id=data.get("source_id"),
    )
    db.session.add(tune)
    db.session.flush()

    for inst_data in data.get("instruments", []):
        entry = TuneByInstrument(
            tune_id=tune.id,
            instrument_id=inst_data["instrument_id"],
            learned_from_id=inst_data.get("learned_from_id"),
            tuning_id=inst_data.get("tuning_id"),
            date_learned=inst_data.get("date_learned"),
            status=inst_data.get("status"),
            difficulty=inst_data.get("difficulty"),
        )
        db.session.add(entry)

    for note_data in data.get("notes", []):
        db.session.add(TuneNote(tune_id=tune.id, note=note_data.get("note")))

    for ref_data in data.get("references", []):
        ref = Reference(tune_id=tune.id, link=ref_data.get("link"), site=ref_data.get("site"))
        db.session.add(ref)
        db.session.flush()
        for m in ref_data.get("musicians", []):
            musician = db.session.get(Musician, m["id"])
            if musician:
                ref.musicians.append(musician)

    db.session.commit()
    return jsonify(tune.to_dict()), 201


# ---------------------------------------------------------------------------
# Update tune core fields
# ---------------------------------------------------------------------------
@tunes_bp.patch("/<int:tune_id>")
@require_api_key
def update_tune(tune_id):
    tune = db.get_or_404(Tune, tune_id)
    data = request.get_json(force=True)
    for field in ("name", "key", "modal", "source_id"):
        if field in data:
            setattr(tune, field, data[field])
    db.session.commit()
    return jsonify(tune.to_dict())


# ---------------------------------------------------------------------------
# Delete tune
# ---------------------------------------------------------------------------
@tunes_bp.delete("/<int:tune_id>")
@require_api_key
def delete_tune(tune_id):
    tune = db.get_or_404(Tune, tune_id)
    db.session.delete(tune)
    db.session.commit()
    return jsonify({"deleted": tune_id})