from flask import Flask, request, jsonify
import random
import time

app = Flask(__name__)

# In-memory storage for sensor readings
readings = []


@app.route('/')
def index():
    return jsonify({
        'service': 'Fermentation Monitoring API',
        'version': '1.0',
        'endpoints': ['/readings', '/readings/latest', '/health'],
        'note': 'No authentication required -- sensor devices connect directly'
    })


# No authentication -- sensors connect directly
@app.route('/readings', methods=['POST'])
def add_reading():
    data = request.get_json() or {}
    reading = {
        'tank_id': data.get('tank_id', 'unknown'),
        'temperature_c': data.get('temperature_c', round(random.uniform(18.0, 24.0), 1)),
        'humidity_pct': data.get('humidity_pct', round(random.uniform(60.0, 85.0), 1)),
        'timestamp': data.get('timestamp', time.strftime('%Y-%m-%dT%H:%M:%S')),
        'ph': data.get('ph', round(random.uniform(4.0, 5.5), 2))
    }
    readings.append(reading)
    return jsonify({'status': 'recorded', 'reading': reading}), 201


@app.route('/readings', methods=['GET'])
def get_readings():
    tank = request.args.get('tank_id')
    if tank:
        filtered = [r for r in readings if r['tank_id'] == tank]
        return jsonify(filtered)
    return jsonify(readings)


@app.route('/readings/latest', methods=['GET'])
def latest_readings():
    if not readings:
        return jsonify({'message': 'No readings recorded yet'})
    latest = {}
    for r in readings:
        latest[r['tank_id']] = r
    return jsonify(list(latest.values()))


@app.route('/health', methods=['GET'])
def health():
    return jsonify({'status': 'ok', 'readings_count': len(readings)})


# Generate some initial readings
def seed_readings():
    tanks = ['tank-01', 'tank-02', 'tank-03']
    for tank in tanks:
        for i in range(5):
            readings.append({
                'tank_id': tank,
                'temperature_c': round(random.uniform(19.0, 23.0), 1),
                'humidity_pct': round(random.uniform(65.0, 80.0), 1),
                'timestamp': f'2024-02-{15+i}T{6+i}:00:00',
                'ph': round(random.uniform(4.2, 5.0), 2)
            })


if __name__ == '__main__':
    seed_readings()
    app.run(host='0.0.0.0', port=8080, debug=False)