import os
import sys
from pathlib import Path
from dotenv import load_dotenv

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent

# Load .env file if available
load_dotenv(BASE_DIR / ".env")

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get(
    "SECRET_KEY",
    "django-insecure-docverify-multi-vendor-verification-engine-suite-key-2026",
)

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.environ.get("DEBUG", "1") in ("1", "true", "True")

ALLOWED_HOSTS = ["*"]

# Application definition
INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",

    # Third party apps
    "rest_framework",

    # Local apps
    "verifier",
]

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "docverify.middleware.RequestLoggingMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

ROOT_URLCONF = "docverify.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [BASE_DIR / "templates"],
        "APP_DIRS": True,
        "OPTIONS": {
            "context_processors": [
                "django.template.context_processors.debug",
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.contrib.messages.context_processors.messages",
            ],
        },
    },
]

WSGI_APPLICATION = "docverify.wsgi.application"

# Database Configuration: PostgreSQL
db_host = os.environ.get('DB_HOST', '16.113.106.152')
db_port = int(os.environ.get('DB_PORT', '5432'))
db_user = os.environ.get('DB_USER', 'vignesh')
db_pass = os.environ.get('DB_PASSWORD', 'vignesh_secret_pass_2026')
env_name = os.environ.get('ENVIRONMENT', 'beta')
db_name = os.environ.get('DB_NAME', f"{env_name}-documentverifcation" if env_name == "beta" else "documentverifcation")

if 'test' in sys.argv:
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.sqlite3",
            "NAME": ":memory:",
        }
    }
else:
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.postgresql",
            "NAME": db_name,
            "USER": db_user,
            "PASSWORD": db_pass,
            "HOST": db_host,
            "PORT": db_port,
            "CONN_MAX_AGE": 60,
        }
    }

AUTH_PASSWORD_VALIDATORS = [
    {"NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator"},
    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
    {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
]

LANGUAGE_CODE = "en-us"
TIME_ZONE = "Asia/Kolkata"
USE_I18N = True
USE_TZ = True

STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

REST_FRAMEWORK = {
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.AllowAny",
    ],
    "DEFAULT_RENDERER_CLASSES": [
        "rest_framework.renderers.JSONRenderer",
        "rest_framework.renderers.BrowsableAPIRenderer",
    ],
}

# ──────────────────────────────────────────────────────────────────────────────
# Vendor API Configurations
# ──────────────────────────────────────────────────────────────────────────────
# Codeplus API Credentials
CODEPLUS_BASE_URL = os.environ.get("CODEPLUS_BASE_URL", "https://apihub.services")
CODEPLUS_CLIENT_API_ID = os.environ.get("CODEPLUS_CLIENT_API_ID", "CAPI-YYR0YJIE0VMTDENY")
CODEPLUS_CLIENT_API_SECRET = os.environ.get("CODEPLUS_CLIENT_API_SECRET", "s24Ts9wFsgl64mFzA61OqG0RDLRs2HFCpmOZBmqs")

# ──────────────────────────────────────────────────────────────────────────────
# Comprehensive Logging Configuration & CloudWatch Shipments
# ──────────────────────────────────────────────────────────────────────────────
LOGS_DIR = BASE_DIR / "logs"
LOGS_DIR.mkdir(exist_ok=True)

LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "formatters": {
        "verbose": {
            "format": "{levelname} {asctime} [{name}] {process:d} {thread:d} {message}",
            "style": "{",
        },
        "simple": {
            "format": "{levelname} {asctime} {message}",
            "style": "{",
        },
    },
    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
            "formatter": "simple",
        },
        "app_file": {
            "level": "INFO",
            "class": "logging.handlers.RotatingFileHandler",
            "filename": str(LOGS_DIR / "app.log"),
            "maxBytes": 10 * 1024 * 1024,  # 10 MB
            "backupCount": 5,
            "formatter": "verbose",
        },
        "error_file": {
            "level": "ERROR",
            "class": "logging.handlers.RotatingFileHandler",
            "filename": str(LOGS_DIR / "error.log"),
            "maxBytes": 10 * 1024 * 1024,  # 10 MB
            "backupCount": 5,
            "formatter": "verbose",
        },
        "requests_file": {
            "level": "INFO",
            "class": "logging.handlers.RotatingFileHandler",
            "filename": str(LOGS_DIR / "requests.log"),
            "maxBytes": 10 * 1024 * 1024,  # 10 MB
            "backupCount": 5,
            "formatter": "simple",
        },
    },
    "loggers": {
        "django": {
            "handlers": ["console", "app_file", "error_file"],
            "level": "INFO",
            "propagate": True,
        },
        "django.request": {
            "handlers": ["console", "requests_file", "error_file"],
            "level": "INFO",
            "propagate": False,
        },
        "verifier": {
            "handlers": ["console", "app_file", "error_file"],
            "level": "INFO",
            "propagate": True,
        },
    },
}