from flask import Blueprint, jsonify, request
from ..models import Deliverable
from ..extensions import db
from datetime import date

deliverables_bp = Blueprint('deliverables', __name__)

@deliverables_bp.route('/deliverables', methods=['GET'])
def get_deliverables():
    project_id = request.args.get('project_id')
    q = Deliverable.query
    if project_id:
        q = q.filter_by(project_id=int(project_id))
    return jsonify([d.to_dict() for d in q.order_by(Deliverable.due_date).all()])

@deliverables_bp.route('/deliverables', methods=['POST'])
def create_deliverable():
    data = request.get_json()
    d = Deliverable(
        project_id=data['project_id'],
        title=data['title'],
        due_date=date.fromisoformat(data['due_date']),
        status=data.get('status', 'upcoming'),
    )
    db.session.add(d)
    db.session.commit()
    return jsonify(d.to_dict()), 201

@deliverables_bp.route('/deliverables/<int:id>', methods=['PATCH'])
def update_deliverable(id):
    d = Deliverable.query.get_or_404(id)
    data = request.get_json()
    if 'title' in data:    d.title    = data['title']
    if 'due_date' in data: d.due_date = date.fromisoformat(data['due_date'])
    if 'status' in data:   d.status   = data['status']
    db.session.commit()
    return jsonify(d.to_dict())

@deliverables_bp.route('/deliverables/<int:id>', methods=['DELETE'])
def delete_deliverable(id):
    d = Deliverable.query.get_or_404(id)
    db.session.delete(d)
    db.session.commit()
    return jsonify({'message': 'Deliverable deleted'}), 200