"""
MELODIX - Test de Integración

Prueba el flujo completo: registro, login, subida, procesamiento y descarga.

Uso: python tests/integration_test.py
"""

import requests
import os
import sys
import time

# ==========================================
# CONFIGURACIÓN
# ==========================================

BASE_URL = os.getenv("TEST_BASE_URL", "http://127.0.0.1:8000")
TEST_USER = "testuser_integration"
TEST_PASS = "password123"
TEST_EMAIL = "test_integration@example.com"
TEST_FILE = "tests/test.wav"

# Crear archivo de test si no existe
if not os.path.exists("tests"):
    os.makedirs("tests")

# ==========================================
# FUNCIONES AUXILIARES
# ==========================================

def create_test_audio():
    """Crea un archivo WAV válido para testing"""
    import wave
    import struct
    
    duration = 2  # segundos
    sample_rate = 44100
    frequency = 440  # Hz (A4)
    
    num_samples = int(sample_rate * duration)
    
    with wave.open(TEST_FILE, 'w') as wav_file:
        wav_file.setnchannels(1)  # Mono
        wav_file.setsampwidth(2)  # 16 bits
        wav_file.setframerate(sample_rate)
        
        for i in range(num_samples):
            # Generar onda sinusoidal
            value = int(32767.0 * 0.5 * 1)  # Amplitud al 50%
            data = struct.pack('<h', value)
            wav_file.writeframesraw(data)
    
    print(f"   Archivo de test creado: {TEST_FILE}")


def print_separator(title=""):
    print("\n" + "=" * 60)
    if title:
        print(f"  {title}")
        print("=" * 60)


# ==========================================
# TEST DE INTEGRACIÓN
# ==========================================

def test_integration():
    print_separator("MELODIX - TEST DE INTEGRACIÓN")
    print(f"Base URL: {BASE_URL}")
    
    # Crear archivo de test
    print("\n[0] Creando archivo de audio de test...")
    try:
        create_test_audio()
        print("   ✓ Archivo creado exitosamente")
    except Exception as e:
        print(f"   ✗ Error creando archivo: {e}")
        return
    
    # ==========================================
    # TEST 1: REGISTRO
    # ==========================================
    print_separator("TEST 1: REGISTRO")
    
    payload = {
        "username": TEST_USER,
        "email": TEST_EMAIL,
        "password": TEST_PASS
    }
    
    try:
        res = requests.post(f"{BASE_URL}/auth/register", json=payload, timeout=10)
        
        if res.status_code == 200:
            print(f"   ✓ Registro exitoso")
            user_data = res.json()
            print(f"   User ID: {user_data.get('id')}")
            print(f"   Créditos iniciales: {user_data.get('credits')}")
        elif res.status_code == 400:
            print(f"   ⚠ Usuario ya existe (esperado en reintentos)")
        else:
            print(f"   ✗ FALLO Registro: {res.status_code} - {res.text}")
            return
    except requests.exceptions.ConnectionError:
        print("   ✗ ERROR DE CONEXIÓN: ¿Está corriendo la API?")
        print("   Ejecuta: iniciar_melodix.bat")
        return
    except Exception as e:
        print(f"   ✗ ERROR: {e}")
        return
    
    # ==========================================
    # TEST 2: LOGIN
    # ==========================================
    print_separator("TEST 2: LOGIN")
    
    data = {
        "username": TEST_USER,
        "password": TEST_PASS,
        "device_id": "test_device_001",
        "device_name": "Integration Test Script"
    }
    
    try:
        res = requests.post(f"{BASE_URL}/auth/token", data=data, timeout=10)
        
        if res.status_code != 200:
            print(f"   ✗ FALLO Login: {res.status_code} - {res.text}")
            return
        
        token_data = res.json()
        token = token_data["access_token"]
        print(f"   ✓ Token obtenido exitosamente")
        print(f"   Token type: {token_data.get('token_type')}")
        print(f"   Expires in: {token_data.get('expires_in')}s")
        
    except Exception as e:
        print(f"   ✗ ERROR LOGIN: {e}")
        return
    
    headers = {"Authorization": f"Bearer {token}"}
    
    # ==========================================
    # TEST 3: VERIFICAR CRÉDITOS
    # ==========================================
    print_separator("TEST 3: PERFIL DE USUARIO")
    
    try:
        res = requests.get(f"{BASE_URL}/auth/users/me", headers=headers, timeout=10)
        user_data = res.json()
        
        print(f"   Username: {user_data.get('username')}")
        print(f"   Email: {user_data.get('email')}")
        print(f"   Créditos: {user_data.get('credits')}")
        
        credits_before = user_data.get('credits', 0)
        
        if credits_before < 1:
            print("   ✗ SIN CRÉDITOS SUFICIENTES PARA PRUEBA DE SUBIDA")
            print("   Tip: Ejecuta en la DB: UPDATE users SET credits = 50 WHERE username = 'testuser_integration';")
            return
        
    except Exception as e:
        print(f"   ✗ ERROR: {e}")
        return
    
    # ==========================================
    # TEST 4: SUBIR CANCIÓN
    # ==========================================
    print_separator("TEST 4: SUBIDA DE CANCIÓN")
    
    try:
        with open(TEST_FILE, "rb") as f:
            files = {"file": f}
            data_upload = {
                "stems": 2,
                "device_id": "test_device_001",
                "trim_start": "",
                "trim_end": ""
            }
            
            print(f"   Subiendo archivo: {TEST_FILE}")
            res = requests.post(
                f"{BASE_URL}/songs/upload",
                headers=headers,
                files=files,
                data=data_upload,
                timeout=30
            )
        
        if res.status_code == 200:
            data_res = res.json()
            celery_id = data_res.get('celery_id')
            task_id = data_res.get('task_id')
            
            print(f"   ✓ SUBIDA EXITOSA")
            print(f"   Task ID: {task_id}")
            print(f"   Celery ID: {celery_id}")
            print(f"   Créditos restantes: {data_res.get('credits_left')}")
            
        else:
            print(f"   ✗ FALLO SUBIDA: {res.status_code} - {res.text}")
            return
            
    except Exception as e:
        print(f"   ✗ ERROR SUBIDA: {e}")
        return
    
    # ==========================================
    # TEST 5: VERIFICAR DESCUENTO DE CRÉDITO
    # ==========================================
    print_separator("TEST 5: VERIFICAR CRÉDITOS")
    
    try:
        res = requests.get(f"{BASE_URL}/auth/users/me", headers=headers, timeout=10)
        credits_after = res.json().get('credits', 0)
        
        print(f"   Créditos antes: {credits_before}")
        print(f"   Créditos después: {credits_after}")
        
        if credits_after == credits_before - 1:
            print(f"   ✓ Crédito descontado correctamente")
        else:
            print(f"   ✗ ERROR: Créditos no descontados correctamente")
            
    except Exception as e:
        print(f"   ✗ ERROR: {e}")
    
    # ==========================================
    # TEST 6: CONSULTAR ESTADO
    # ==========================================
    print_separator("TEST 6: ESTADO DE LA TAREA")
    
    if not celery_id:
        print("   ✗ No hay Celery ID para consultar")
        return
    
    max_attempts = 30
    attempt = 0
    
    while attempt < max_attempts:
        try:
            res = requests.get(
                f"{BASE_URL}/songs/status/{celery_id}",
                headers=headers,
                timeout=10
            )
            
            status_data = res.json()
            estado = status_data.get('estado')
            progreso = status_data.get('progreso', 0)
            mensaje = status_data.get('mensaje', '')
            
            print(f"   Intento {attempt + 1}/{max_attempts}: Estado = {estado}, Progreso = {progreso}%")
            
            if estado == "SUCCESS":
                print(f"   ✓ TAREA COMPLETADA EXITOSAMENTE")
                print(f"   Folder: {status_data.get('folder')}")
                resultado = status_data.get('resultado')
                if resultado:
                    print(f"   BPM: {resultado.get('bpm')}")
                    print(f"   Acordes: {len(resultado.get('acordes', []))} detectados")
                break
            elif estado == "FAILURE":
                print(f"   ✗ TAREA FALLÓ: {mensaje}")
                break
            elif estado == "PROGRESS":
                print(f"   → Progreso: {mensaje}")
            else:
                print(f"   → Estado: {estado}")
            
            attempt += 1
            time.sleep(2)
            
        except Exception as e:
            print(f"   ✗ ERROR CONSULTANDO ESTADO: {e}")
            attempt += 1
            time.sleep(2)
    
    if attempt >= max_attempts:
        print(f"   ⚠ Timeout: La tarea tardó más de {max_attempts * 2} segundos")
    
    # ==========================================
    # TEST 7: HISTORIAL
    # ==========================================
    print_separator("TEST 7: HISTORIAL DE CANCIONES")
    
    try:
        res = requests.get(
            f"{BASE_URL}/songs/history",
            headers=headers,
            timeout=10
        )
        
        if res.status_code == 200:
            history = res.json()
            print(f"   Total canciones: {history.get('total')}")
            tasks = history.get('tasks', [])
            if tasks:
                print(f"   Última canción:")
                print(f"     - Nombre: {tasks[0].get('song_name')}")
                print(f"     - Stems: {tasks[0].get('stems')}")
                print(f"     - Estado: {tasks[0].get('status')}")
            print(f"   ✓ Historial obtenido correctamente")
        else:
            print(f"   ✗ FALLO HISTORIAL: {res.status_code}")
            
    except Exception as e:
        print(f"   ✗ ERROR: {e}")
    
    # ==========================================
    # RESUMEN FINAL
    # ==========================================
    print_separator("RESUMEN DE TESTS")
    print("   ✓ Registro/Login")
    print("   ✓ Verificación de créditos")
    print("   ✓ Subida de archivo")
    print("   ✓ Descuento de créditos")
    print("   ✓ Consulta de estado")
    print("   ✓ Historial de canciones")
    print_separator("¡TESTS COMPLETADOS!")
    print()


if __name__ == "__main__":
    test_integration()