"""Logistics Blueprint: shipments, couriers, tracking.

Prefix: /pos/api/logistics
"""

from flask import Blueprint, request, jsonify, g
from middleware import require_auth
from tenant_db import get_tenant_conn
from services.logistics_engine import (
    create_shipment, get_shipment, list_shipments, update_shipment_status,
    get_couriers, add_courier,
)

logistics_bp = Blueprint('logistics', __name__, url_prefix='/pos/api/logistics')


@logistics_bp.route('/shipments', methods=['GET'])
@require_auth()
def list_all_shipments():
    status = request.args.get('status')
    courier_id = request.args.get('courier_id', type=int)
    related_type = request.args.get('related_type')
    related_id = request.args.get('related_id', type=int)
    page = int(request.args.get('page', 1))
    per_page = min(int(request.args.get('per_page', 50)), 200)

    conn = get_tenant_conn(g.tenant_id)
    try:
        result = list_shipments(
            conn, g.tenant_id, status=status, courier_id=courier_id,
            related_type=related_type, related_id=related_id,
            page=page, per_page=per_page,
        )
        return jsonify(result)
    finally:
        conn.close()


@logistics_bp.route('/shipments', methods=['POST'])
@require_auth()
def create_new_shipment():
    data = request.get_json() or {}
    conn = get_tenant_conn(g.tenant_id)
    try:
        result = create_shipment(conn, {
            'tenant_id': g.tenant_id,
            'branch_id': data.get('branch_id', g.branch_id),
            'shipment_type': data.get('shipment_type', 'outbound'),
            'related_type': data.get('related_type'),
            'related_id': data.get('related_id'),
            'courier_id': data.get('courier_id'),
            'tracking_number': data.get('tracking_number'),
            'origin_address': data.get('origin_address'),
            'destination_address': data.get('destination_address'),
            'recipient_name': data.get('recipient_name'),
            'recipient_phone': data.get('recipient_phone'),
            'estimated_delivery': data.get('estimated_delivery'),
            'shipping_cost': data.get('shipping_cost'),
            'weight_kg': data.get('weight_kg'),
            'dimensions_cm': data.get('dimensions_cm'),
            'notes': data.get('notes'),
            'created_by': getattr(g, 'employee_id', None),
        })
        return jsonify(result), 201
    finally:
        conn.close()


@logistics_bp.route('/shipments/<int:shipment_id>', methods=['GET'])
@require_auth()
def get_shipment_detail(shipment_id):
    conn = get_tenant_conn(g.tenant_id)
    try:
        shipment = get_shipment(conn, shipment_id)
        if not shipment:
            return jsonify({'error': 'Shipment not found'}), 404
        return jsonify(shipment)
    finally:
        conn.close()


@logistics_bp.route('/shipments/<int:shipment_id>/status', methods=['PUT'])
@require_auth()
def update_status_endpoint(shipment_id):
    data = request.get_json() or {}
    new_status = data.get('status')
    if not new_status:
        return jsonify({'error': 'status is required'}), 400
    conn = get_tenant_conn(g.tenant_id)
    try:
        result = update_shipment_status(
            conn, shipment_id, new_status,
            location=data.get('location'),
            description=data.get('description'),
            raw_response=data.get('raw_response'),
        )
        return jsonify(result)
    except ValueError as e:
        return jsonify({'error': str(e)}), 400
    finally:
        conn.close()


@logistics_bp.route('/couriers', methods=['GET'])
@require_auth()
def list_couriers():
    conn = get_tenant_conn(g.tenant_id)
    try:
        couriers = get_couriers(conn, g.tenant_id)
        return jsonify({'couriers': couriers})
    finally:
        conn.close()


@logistics_bp.route('/couriers', methods=['POST'])
@require_auth()
def create_courier():
    data = request.get_json() or {}
    if not data.get('name') or not data.get('code'):
        return jsonify({'error': 'name and code are required'}), 400
    conn = get_tenant_conn(g.tenant_id)
    try:
        cid = add_courier(
            conn, g.tenant_id, data['name'], data['code'],
            tracking_url_template=data.get('tracking_url_template'),
            api_endpoint=data.get('api_endpoint'),
            is_active=data.get('is_active', True),
        )
        return jsonify({'id': cid, 'message': 'Courier created'}), 201
    finally:
        conn.close()