"""Guest bootstrap and owner-checked human support adapters, separate from staff APIs."""

from flask import Blueprint, current_app, request
from werkzeug.exceptions import RequestEntityTooLarge

from .. import human_service, visitor_service


bp = Blueprint('visitor', __name__)


@bp.post('/api/visitor/session')
def visitor_session():
    request.max_content_length = 1024
    try:
        return visitor_service.start_session(request.get_json(silent=True))
    except RequestEntityTooLarge:
        return {'ok': False, 'error': '访客会话格式无效。'}, 413


@bp.route('/api/visitor/human/<action>', methods=['GET', 'POST'])
def visitor_human(action):
    methods = {'poll': 'GET', 'request': 'POST', 'send': 'POST', 'close': 'POST'}
    if action not in methods or request.method != methods[action]:
        return {'ok': False}, 404
    data = request.get_json(silent=True) if request.method == 'POST' else {}
    if not isinstance(data, dict):
        return {'ok': False}, 400
    if action == 'request':
        if not visitor_service.owns_conversation(data.get('conv_id')):
            return {'ok': False, 'error': 'conversation_not_found'}, 404
        return human_service.human_request(data)
    sid = request.args.get('sid', type=int) if action == 'poll' else data.get('sid')
    if not visitor_service.owns_human_session(sid):
        return {'ok': False, 'error': 'session_not_found'}, 404
    if action == 'poll':
        after = request.args.get('after', 0, type=int)
        if not 0 <= after <= 9223372036854775807:
            return {'ok': False}, 400
        result = human_service.human_poll(sid, after, current_app.extensions['human_typing'])
        result.pop('note', None)
        return result
    if action == 'send':
        if data.get('side', 'customer') != 'customer':
            return {'ok': False}, 403
        return human_service.human_send({**data, 'side': 'customer'})
    return human_service.human_close(data)