import json
import os
import uuid
from datetime import datetime
from flask import Flask, render_template, request, jsonify

app = Flask(__name__)
DATA_DIR = os.path.join(os.path.dirname(__file__), 'data')
os.makedirs(DATA_DIR, exist_ok=True)

def list_projects():
    projects = []
    for f in os.listdir(DATA_DIR):
        if f.endswith('.json'):
            path = os.path.join(DATA_DIR, f)
            with open(path) as fp:
                data = json.load(fp)
            projects.append({
                'id': f.replace('.json', ''),
                'name': data.get('name', 'Unbenannt'),
                'updated': data.get('updated', ''),
                'rooms': len(data.get('rooms', []))
            })
    projects.sort(key=lambda p: p['updated'], reverse=True)
    return projects

def load_project(pid):
    path = os.path.join(DATA_DIR, f'{pid}.json')
    if not os.path.exists(path):
        return None
    with open(path) as fp:
        return json.load(fp)

def save_project(pid, data):
    data['updated'] = datetime.now().isoformat()
    path = os.path.join(DATA_DIR, f'{pid}.json')
    with open(path, 'w') as fp:
        json.dump(data, fp, indent=2, ensure_ascii=False)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/api/projects')
def api_projects():
    return jsonify(list_projects())

@app.route('/api/projects', methods=['POST'])
def api_create_project():
    body = request.get_json() or {}
    pid = str(uuid.uuid4())[:8]
    data = {
        'name': body.get('name', 'Neuer Grundriss'),
        'created': datetime.now().isoformat(),
        'updated': datetime.now().isoformat(),
        'rooms': [],
        'grid_size': 20  # cm per grid cell
    }
    save_project(pid, data)
    return jsonify({'id': pid, **data})

@app.route('/api/projects/<pid>')
def api_get_project(pid):
    data = load_project(pid)
    if not data:
        return jsonify({'error': 'Projekt nicht gefunden'}), 404
    return jsonify({'id': pid, **data})

@app.route('/api/projects/<pid>', methods=['PUT'])
def api_update_project(pid):
    data = load_project(pid)
    if not data:
        return jsonify({'error': 'Projekt nicht gefunden'}), 404
    body = request.get_json() or {}
    if 'name' in body:
        data['name'] = body['name']
    if 'rooms' in body:
        data['rooms'] = body['rooms']
    save_project(pid, data)
    return jsonify({'id': pid, **data})

@app.route('/api/projects/<pid>', methods=['DELETE'])
def api_delete_project(pid):
    path = os.path.join(DATA_DIR, f'{pid}.json')
    if os.path.exists(path):
        os.remove(path)
    return jsonify({'status': 'ok'})

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, debug=True)