"""
Core Routes - Setup Wizard
GMAO Collège - Assistant de configuration initiale
"""
import os
import json
import hmac
from datetime import datetime, timezone
from flask import Blueprint, render_template, redirect, url_for, flash, request, jsonify, current_app, session, abort
from flask_login import login_required, current_user
from werkzeug.security import generate_password_hash
from ...extensions import db, csrf
from ..models.user import User
from ..models.college import College, Building, Zone, Room
from ..models.equipment import EquipmentCategory
from ..models.maintenance import Lot
from ..models.planning import WorkSchedule, CollegeClosure, ClosureWorkDay
from ..setup_catalog import EQUIPMENT_CATEGORIES, LOTS, grouped_catalog

setup_wizard_bp = Blueprint('setup_wizard', __name__, url_prefix='/setup-wizard')

# Dossier contenant les données
DATA_DIR = os.path.join(os.path.dirname(__file__), '..', '..', 'instance')


def is_setup_complete():
    """Vérifie si le setup est déjà terminé."""
    return os.path.exists(os.path.join(DATA_DIR, '.setup_complete'))


@setup_wizard_bp.before_request
def protect_initial_setup():
    """Exige un jeton d'environnement tant que l'installation est incomplète."""
    # Le panneau de gestion reste accessible aux administrateurs connectés,
    # même si le marqueur du volume instance a été perdu lors d'un redéploiement.
    if request.endpoint == 'setup_wizard.admin_panel' and current_user.is_authenticated and current_user.is_admin():
        return None
    if is_setup_complete():
        return None

    expected_token = os.environ.get('SETUP_TOKEN', '')
    if len(expected_token) < 32:
        current_app.logger.error('SETUP_TOKEN is missing or too short')
        return jsonify({'error': 'Installation sécurisée non configurée'}), 503

    supplied_token = (
        request.headers.get('X-Setup-Token')
        or request.args.get('token', '')
    )
    if supplied_token and hmac.compare_digest(supplied_token, expected_token):
        session['setup_authorized'] = True
        if request.method == 'GET' and request.args.get('token'):
            return redirect(request.path)

    if not session.get('setup_authorized'):
        return jsonify({'error': 'Jeton d’installation requis'}), 403

    return None


def load_lots_data():
    """Retourne le catalogue embarqué issu du dump SQL de référence."""
    return grouped_catalog()


class SetupProgress(db.Model):
    """Progression du setup wizard."""
    __tablename__ = 'setup_progress'
    
    id = db.Column(db.Integer, primary_key=True)
    # Numéro de la dernière étape validée. Zéro signifie « aucune ».
    step = db.Column(db.Integer, default=0)
    admin_username = db.Column(db.String(100), nullable=True)
    college_name = db.Column(db.String(200), nullable=True)
    college_address = db.Column(db.String(255), nullable=True)
    college_zip = db.Column(db.String(10), nullable=True)
    college_city = db.Column(db.String(100), nullable=True)
    buildings_json = db.Column(db.Text, nullable=True)
    lots_json = db.Column(db.Text, nullable=True)
    categories_json = db.Column(db.Text, nullable=True)
    vacations_json = db.Column(db.Text, nullable=True)
    vacances_zone = db.Column(db.String(5), nullable=True)
    vacances_annee = db.Column(db.Integer, nullable=True)
    ent_configured = db.Column(db.Boolean, default=False)
    pronote_qr_code = db.Column(db.Text, nullable=True)
    pronote_qr_code_id = db.Column(db.String(50), nullable=True)
    pronote_pin = db.Column(db.String(100), nullable=True)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    updated_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
    
    def __repr__(self):
        return f"<SetupProgress step={self.step}>"
    
    @staticmethod
    def get():
        """Récupère ou crée la progression."""
        progress = SetupProgress.query.first()
        if not progress:
            progress = SetupProgress()
            db.session.add(progress)
            db.session.commit()
        return progress
    
    def get_buildings(self):
        """Récupère la liste des bâtiments."""
        if not self.buildings_json:
            return []
        try:
            return json.loads(self.buildings_json)
        except:
            return []
    
    def set_buildings(self, buildings_list):
        """Sauvegarde la liste des bâtiments."""
        self.buildings_json = json.dumps(buildings_list)
    
    def get_lots(self):
        """Récupère la liste des lot."""
        if not self.lots_json:
            return []
        try:
            return json.loads(self.lots_json)
        except:
            return []
    
    def set_lots(self, lots_list):
        """Sauvegarde la liste des lots."""
        self.lots_json = json.dumps(lots_list)
    
    def to_dict(self):
        """Convertit en dictionnaire pour le template."""
        buildings = [
            {'id': item.id, 'name': item.name, 'description': item.description or ''}
            for item in Building.query.order_by(Building.name, Building.id).all()
        ]
        zones = [
            {'id': item.id, 'name': item.name, 'building_id': item.building_id}
            for item in Zone.query.order_by(Zone.building_id, Zone.name, Zone.id).all()
        ]
        rooms = [
            {
                'id': item.id,
                'name': item.name,
                'code': '' if item.code in (None, 'None') else item.code,
                'building_id': item.building_id,
                'zone_id': item.zone_id,
                'floor': item.floor or 0,
                'room_type_id': item.room_type_id,
            }
            for item in Room.query.order_by(Room.building_id, Room.name, Room.id).all()
        ]
        vacation_periods = [
            {
                'id': closure.id,
                'name': closure.name,
                'start_date': closure.start_date.isoformat(),
                'end_date': closure.end_date.isoformat(),
                'work_days': [
                    {
                        'id': work_day.id,
                        'work_date': work_day.work_date.isoformat(),
                        'start_time': work_day.start_time.strftime('%H:%M'),
                        'end_time': work_day.end_time.strftime('%H:%M'),
                        'lunch_start': work_day.lunch_start.strftime('%H:%M') if work_day.lunch_start else '',
                        'lunch_end': work_day.lunch_end.strftime('%H:%M') if work_day.lunch_end else '',
                        'notes': work_day.notes or '',
                    }
                    for work_day in closure.work_days
                ],
            }
            for closure in CollegeClosure.query.filter_by(closure_type='vacances')
            .order_by(CollegeClosure.start_date, CollegeClosure.id).all()
        ]
        return {
            'step': self.step,
            'data': {
                'admin_username': self.admin_username or '',
                'college': {
                    'name': self.college_name or '',
                    'address': self.college_address or '',
                    'zip': self.college_zip or '',
                    'city': self.college_city or '',
                },
                'buildings': buildings,
                'zones': zones,
                'rooms': rooms,
                'lots': self.get_lots(),
                'categories': json.loads(self.categories_json) if self.categories_json else [],
                'vacances_zone': self.vacances_zone or '',
                'vacances_annee': self.vacances_annee,
                'vacation_periods': vacation_periods,
                'ent_configured': self.ent_configured,
            }
        }


@setup_wizard_bp.route('/')
def index():
    """Page principale du wizard - accessible sans auth."""
    if is_setup_complete():
        return render_template('setup_wizard/setup_complete.html')
    
    progress = SetupProgress.get()
    lots_data = load_lots_data()
    
    return render_template('setup_wizard/index.html',
                         progress=progress.to_dict(),
                         lots_data=lots_data)


@setup_wizard_bp.route('/api/progress')
@csrf.exempt
def api_progress():
    """API pour récupérer la progression."""
    if is_setup_complete():
        return jsonify({'complete': True})
    
    progress = SetupProgress.get()
    return jsonify({
        'complete': False,
        'step': progress.step,
        'data': progress.to_dict()
    })


@setup_wizard_bp.route('/api/step/<int:step>', methods=['POST'])
@csrf.exempt
def api_save_step(step):
    """Sauvegarde une étape du setup."""
    if is_setup_complete():
        return jsonify({'error': 'Setup déjà terminé'}), 403
    
    try:
        data = request.get_json(silent=True)
        if not isinstance(data, dict):
            return jsonify({'error': 'Corps JSON invalide'}), 400
        progress = SetupProgress.get()
        
        if step == 1:
            # Étape 1 : Utilisateur admin
            username = data.get('username', '').strip()
            password = data.get('password', '').strip()
            
            if not username or len(username) < 3:
                return jsonify({'error': 'Le nom d\'utilisateur doit faire au moins 3 caractères'}), 400
            
            if not password or len(password) < 12:
                return jsonify({'error': 'Le mot de passe doit faire au moins 12 caractères'}), 400
            
            # Supprimer l'utilisateur admin par défaut s'il existe
            default_admin = User.query.filter_by(username='admin').first()
            if default_admin and username != 'admin':
                db.session.delete(default_admin)
            
            # Créer ou mettre à jour l'utilisateur
            user = User.query.filter_by(username=username).first()
            if user:
                user.set_password(password)
                user.role = 'admin'
                user.is_active = True
            else:
                user = User(
                    username=username,
                    email=f'{username}@gmao.local',
                    role='admin',
                    is_active=True
                )
                user.set_password(password)
                db.session.add(user)
            
            progress.admin_username = username
            progress.step = 2
            db.session.commit()
            
            return jsonify({'success': True, 'step': 2})
        
        elif step == 2:
            # Étape 2 : Collège
            name = data.get('name', '').strip()
            address = data.get('address', '').strip()
            zip_code = data.get('zip', '').strip()
            city = data.get('city', '').strip()
            
            if not all([name, address, zip_code, city]):
                return jsonify({'error': 'Tous les champs sont requis'}), 400
            
            college = College.query.first()
            if college:
                college.name = name
                college.address = address
                college.zip_code = zip_code
                college.city = city
            else:
                college = College(
                    name=name,
                    address=address,
                    zip_code=zip_code,
                    city=city
                )
                db.session.add(college)
            
            progress.college_name = name
            progress.college_address = address
            progress.college_zip = zip_code
            progress.college_city = city
            progress.step = 3
            db.session.commit()
            
            return jsonify({'success': True, 'step': 3})
        
        elif step == 3:
            # Étape 3 : Bâtiments
            buildings = data.get('buildings', [])
            if not isinstance(buildings, list) or not buildings:
                return jsonify({'error': 'Ajoutez au moins un bâtiment'}), 400

            saved = []
            for b in buildings:
                if not isinstance(b, dict):
                    return jsonify({'error': 'Bâtiment invalide'}), 400
                name = str(b.get('name') or '').strip()
                if not name:
                    return jsonify({'error': 'Le nom de chaque bâtiment est requis'}), 400
                building_id = b.get('id')
                building = db.session.get(Building, building_id) if building_id else None
                if building is None:
                    building = Building.query.filter(db.func.lower(Building.name) == name.lower()).first()
                if building is None:
                    building = Building(name=name)
                    db.session.add(building)
                    db.session.flush()
                building.name = name
                building.description = str(b.get('description') or '').strip()
                saved.append({'id': building.id, 'name': building.name, 'description': building.description or ''})

            progress.set_buildings(saved)
            progress.step = max(progress.step or 0, 3)
            db.session.commit()

            return jsonify({'success': True, 'step': 3, 'buildings': saved})

        elif step == 4:
            # Étape 4 : Zones. Les absences du formulaire ne suppriment rien.
            zones = data.get('zones', [])
            if not isinstance(zones, list):
                return jsonify({'error': 'Liste de zones invalide'}), 400
            saved = []
            for item in zones:
                if not isinstance(item, dict):
                    return jsonify({'error': 'Zone invalide'}), 400
                name = str(item.get('name') or '').strip()
                try:
                    building_id = int(item.get('building_id'))
                except (TypeError, ValueError):
                    return jsonify({'error': f'Bâtiment invalide pour la zone {name or "sans nom"}'}), 400
                if not name or db.session.get(Building, building_id) is None:
                    return jsonify({'error': 'Chaque zone doit avoir un nom et un bâtiment existant'}), 400
                zone_id = item.get('id')
                zone = db.session.get(Zone, zone_id) if zone_id else None
                if zone is None:
                    zone = Zone.query.filter(
                        Zone.building_id == building_id,
                        db.func.lower(Zone.name) == name.lower(),
                    ).first()
                if zone is None:
                    zone = Zone(name=name, building_id=building_id)
                    db.session.add(zone)
                    db.session.flush()
                zone.name = name
                zone.building_id = building_id
                saved.append({'id': zone.id, 'name': zone.name, 'building_id': zone.building_id})

            progress.step = max(progress.step or 0, 4)
            db.session.commit()

            return jsonify({'success': True, 'step': 4, 'zones': saved})

        elif step == 5:
            # Étape 5 : Salles. Mise à jour/création uniquement.
            rooms = data.get('rooms', [])
            if not isinstance(rooms, list):
                return jsonify({'error': 'Liste de salles invalide'}), 400
            saved = []
            for item in rooms:
                if not isinstance(item, dict):
                    return jsonify({'error': 'Salle invalide'}), 400
                name = str(item.get('name') or '').strip()
                try:
                    building_id = int(item.get('building_id'))
                    floor = int(item.get('floor') or 0)
                except (TypeError, ValueError):
                    return jsonify({'error': f'Bâtiment ou étage invalide pour {name or "la salle"}'}), 400
                building = db.session.get(Building, building_id)
                if not name or building is None:
                    return jsonify({'error': 'Chaque salle doit avoir un nom et un bâtiment existant'}), 400
                zone_id = item.get('zone_id') or None
                if zone_id is not None:
                    try:
                        zone_id = int(zone_id)
                    except (TypeError, ValueError):
                        return jsonify({'error': f'Zone invalide pour {name}'}), 400
                    zone = db.session.get(Zone, zone_id)
                    if zone is None or zone.building_id != building_id:
                        return jsonify({'error': f'La zone de {name} ne correspond pas à son bâtiment'}), 400
                room_id = item.get('id')
                room = db.session.get(Room, room_id) if room_id else None
                if room is None:
                    room = Room.query.filter(
                        Room.building_id == building_id,
                        db.func.lower(Room.name) == name.lower(),
                    ).first()
                if room is None:
                    room = Room(name=name, building_id=building_id)
                    db.session.add(room)
                    db.session.flush()
                room.name = name
                room.code = str(item.get('code') or '').strip() or None
                room.building_id = building_id
                room.zone_id = zone_id
                room.floor = floor
                saved.append({
                    'id': room.id, 'name': room.name, 'code': room.code or '',
                    'building_id': room.building_id, 'zone_id': room.zone_id, 'floor': room.floor,
                })

            progress.step = max(progress.step or 0, 5)
            db.session.commit()
            return jsonify({'success': True, 'step': 5, 'rooms': saved})

        elif step == 6:
            # Étape 6 : catalogue fixe des catégories et lots du dump SQL.
            categories_by_name = {}
            for name in EQUIPMENT_CATEGORIES:
                category = EquipmentCategory.query.filter(
                    db.func.lower(EquipmentCategory.name) == name.lower()
                ).first()
                if category is None:
                    category = EquipmentCategory(name=name)
                    db.session.add(category)
                    db.session.flush()
                categories_by_name[name] = category

            for lot_name, category_name in LOTS:
                lot = Lot.query.filter(db.func.lower(Lot.name) == lot_name.lower()).first()
                if lot is None:
                    lot = Lot(name=lot_name)
                    db.session.add(lot)
                lot.category_id = categories_by_name[category_name].id

            progress.categories_json = json.dumps(list(EQUIPMENT_CATEGORIES), ensure_ascii=False)
            progress.set_lots([name for name, _category in LOTS])
            progress.step = max(progress.step or 0, 6)
            db.session.commit()
            return jsonify({
                'success': True, 'step': 6,
                'categories_count': len(EQUIPMENT_CATEGORIES), 'lots_count': len(LOTS),
            })

        elif step == 7:
            # Étape 7 : Vacances et horaires
            zone = data.get('zone', 'A')
            annee = data.get('annee', datetime.now().year)
            import_vacances = data.get('import_vacances', False)
            import_feries = data.get('import_feries', False)
            vacation_periods = data.get('vacation_periods', [])
            if not isinstance(vacation_periods, list):
                return jsonify({'error': 'Liste de vacances invalide'}), 400

            saved_periods = []
            for period in vacation_periods:
                if not isinstance(period, dict):
                    return jsonify({'error': 'Période de vacances invalide'}), 400
                name = str(period.get('name') or '').strip()
                try:
                    start_date = datetime.strptime(period.get('start_date', ''), '%Y-%m-%d').date()
                    end_date = datetime.strptime(period.get('end_date', ''), '%Y-%m-%d').date()
                except (TypeError, ValueError):
                    return jsonify({'error': f'Dates invalides pour {name or "une période"}'}), 400
                if not name or end_date < start_date:
                    return jsonify({'error': 'Chaque période doit avoir un nom et des dates cohérentes'}), 400

                closure = db.session.get(CollegeClosure, period.get('id')) if period.get('id') else None
                if closure is None:
                    closure = CollegeClosure.query.filter_by(
                        name=name, start_date=start_date, end_date=end_date
                    ).first()
                if closure is None:
                    closure = CollegeClosure(name=name, start_date=start_date, end_date=end_date)
                    db.session.add(closure)
                    db.session.flush()
                closure.name = name
                closure.start_date = start_date
                closure.end_date = end_date
                closure.closure_type = 'vacances'
                # Toute la période est fermée, sauf les dates exactes ci-dessous.
                closure.work_hours_type = 'none'

                work_days = period.get('work_days', [])
                if not isinstance(work_days, list):
                    db.session.rollback()
                    return jsonify({'error': f'Jours travaillés invalides pour {name}'}), 400
                ClosureWorkDay.query.filter_by(closure_id=closure.id).delete()
                seen_dates = set()
                saved_days = []
                for day in work_days:
                    if not isinstance(day, dict):
                        db.session.rollback()
                        return jsonify({'error': f'Jour travaillé invalide pour {name}'}), 400
                    try:
                        work_date = datetime.strptime(day.get('work_date', ''), '%Y-%m-%d').date()
                        start_time = datetime.strptime(day.get('start_time', ''), '%H:%M').time()
                        end_time = datetime.strptime(day.get('end_time', ''), '%H:%M').time()
                        lunch_start = datetime.strptime(day['lunch_start'], '%H:%M').time() if day.get('lunch_start') else None
                        lunch_end = datetime.strptime(day['lunch_end'], '%H:%M').time() if day.get('lunch_end') else None
                    except (TypeError, ValueError):
                        db.session.rollback()
                        return jsonify({'error': f'Date ou horaires invalides pour un jour travaillé de {name}'}), 400
                    if not start_date <= work_date <= end_date:
                        db.session.rollback()
                        return jsonify({'error': f'Le {work_date:%d/%m/%Y} est hors de la période {name}'}), 400
                    if work_date in seen_dates or end_time <= start_time:
                        db.session.rollback()
                        return jsonify({'error': f'Jour dupliqué ou horaires incohérents dans {name}'}), 400
                    if (lunch_start is None) != (lunch_end is None) or (
                        lunch_start and not (start_time <= lunch_start < lunch_end <= end_time)
                    ):
                        db.session.rollback()
                        return jsonify({'error': f'Pause déjeuner incohérente le {work_date:%d/%m/%Y}'}), 400
                    seen_dates.add(work_date)
                    work_day = ClosureWorkDay(
                        closure_id=closure.id,
                        work_date=work_date,
                        start_time=start_time,
                        end_time=end_time,
                        lunch_start=lunch_start,
                        lunch_end=lunch_end,
                        notes=str(day.get('notes') or '').strip() or None,
                    )
                    db.session.add(work_day)
                    saved_days.append({'work_date': work_date.isoformat()})
                saved_periods.append({'id': closure.id, 'name': name, 'work_days': saved_days})

            progress.vacances_zone = zone
            progress.vacances_annee = annee
            progress.vacations_json = json.dumps({
                'import_vacances': bool(import_vacances),
                'import_feries': bool(import_feries),
                'vacation_periods': saved_periods,
            }, ensure_ascii=False)
            progress.step = max(progress.step or 0, 7)
            db.session.commit()

            return jsonify({'success': True, 'step': 7, 'vacation_periods': saved_periods})

        elif step in (8, 9):
            # Intégrations facultatives : le paramétrage complet reste dans leurs pages dédiées.
            progress.step = max(progress.step or 0, step)
            db.session.commit()
            return jsonify({'success': True, 'step': step, 'skipped': True})

        elif step == 10:
            progress.step = max(progress.step or 0, 10)
            db.session.commit()
            return jsonify({'success': True, 'step': 10})

        else:
            return jsonify({'error': 'Étape invalide'}), 400
            
    except Exception:
        db.session.rollback()
        current_app.logger.exception('Échec lors de la sauvegarde du wizard')
        return jsonify({'error': 'Erreur interne lors de la sauvegarde'}), 500


@setup_wizard_bp.route('/api/complete', methods=['POST'])
@csrf.exempt
def api_complete():
    """Marquer le setup comme terminé."""
    if is_setup_complete():
        return jsonify({'error': 'Setup déjà terminé'}), 403
    
    try:
        progress = SetupProgress.get()
        admin = User.query.filter_by(role='admin', is_active=True).first()
        if not admin:
            return jsonify({'error': 'Un administrateur actif est requis'}), 400
        if progress.step < 10:
            return jsonify({'error': 'Toutes les étapes doivent être terminées'}), 400

        # Créer le fichier .setup_complete
        with open(os.path.join(DATA_DIR, '.setup_complete'), 'w') as f:
            f.write(datetime.now(timezone.utc).isoformat())
        
        return jsonify({'success': True})
    except Exception:
        current_app.logger.exception('Échec lors de la finalisation du wizard')
        return jsonify({'error': 'Erreur interne lors de la finalisation'}), 500


@setup_wizard_bp.route('/api/test-ent', methods=['POST'])
@csrf.exempt
def api_test_ent():
    """Tester la connexion ENT."""
    if is_setup_complete():
        return jsonify({'error': 'Setup déjà terminé'}), 403

    data = request.get_json(silent=True) or {}
    username = data.get('username', '')
    password = data.get('password', '')
    
    return jsonify({'success': False, 'error': 'Test ENT non implémenté'}), 501


@setup_wizard_bp.route('/api/test-pronote', methods=['POST'])
@csrf.exempt
def api_test_pronote():
    """Tester la connexion Pronote."""
    if is_setup_complete():
        return jsonify({'error': 'Setup déjà terminé'}), 403

    data = request.get_json(silent=True) or {}
    qr_code_data = data.get('qr_code', '')
    pin = data.get('pin', '')
    
    return jsonify({'success': False, 'error': 'Test Pronote non implémenté'}), 501


@setup_wizard_bp.route('/admin')
@login_required
def admin_panel():
    """Panneau d'administration."""
    if not current_user.is_admin():
        abort(403)
    from ..models.user import User
    from ..models.college import Building, Room
    from ..models.equipment import Equipment
    
    stats = {
        'users': User.query.count(),
        'buildings': Building.query.count(),
        'rooms': Room.query.count(),
        'equipments': Equipment.query.count()
    }
    
    return render_template('setup_wizard/admin_panel.html', stats=stats)