import os
from pathlib import Path

from dotenv import load_dotenv

BASE_DIR = Path(__file__).resolve().parents[3]
load_dotenv(BASE_DIR / ".env", override=False)

SECRET_KEY = os.getenv("DJANGO_SECRET_KEY", "dev-only-change-me")
DEBUG = os.getenv("DJANGO_DEBUG", "false").lower() == "true"
ALLOWED_HOSTS = os.getenv("DJANGO_ALLOWED_HOSTS", "localhost,127.0.0.1").split(",")

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.postgres",
    "django.contrib.staticfiles",
    "corsheaders",
    "apps.accounts",
    "apps.audit",
    "apps.system",
    "apps.tickets",
    "apps.workitems",
    "apps.solutions",
    "apps.knowledge",
    "apps.modelhub",
    "apps.skills",
    "apps.agents",
    "apps.tools",
    "apps.channels",
]

MIDDLEWARE = [
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.security.SecurityMiddleware",
    "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 = "config.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [],
        "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 = "config.wsgi.application"
ASGI_APPLICATION = "config.asgi.application"

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.postgresql",
        "NAME": os.getenv("POSTGRES_DB", "ai_ticket_platform"),
        "USER": os.getenv("POSTGRES_USER", "ai_ticket"),
        "PASSWORD": os.getenv("POSTGRES_PASSWORD", "ai_ticket"),
        "HOST": os.getenv("POSTGRES_HOST", "localhost"),
        "PORT": int(os.getenv("POSTGRES_PORT", "5432")),
    }
}

LANGUAGE_CODE = "zh-hans"
TIME_ZONE = "Asia/Shanghai"
USE_I18N = True
USE_TZ = True

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
    },
    {
        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
        "OPTIONS": {"min_length": 8},
    },
    {
        "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
    },
    {
        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
    },
]

STATIC_URL = "static/"
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

CORS_ALLOWED_ORIGINS = os.getenv(
    "CORS_ALLOWED_ORIGINS",
    "http://localhost:5173",
).split(",")
CORS_ALLOW_CREDENTIALS = True
CSRF_TRUSTED_ORIGINS = os.getenv(
    "CSRF_TRUSTED_ORIGINS",
    "http://localhost:5173,http://127.0.0.1:5173",
).split(",")
FRONTEND_APP_URL = os.getenv("FRONTEND_APP_URL", "http://localhost:5173").rstrip("/")
OIDC_CALLBACK_BASE_URL = os.getenv("OIDC_CALLBACK_BASE_URL", "").rstrip("/")

DJANGO_SUPERUSER_USERNAME = os.getenv("DJANGO_SUPERUSER_USERNAME", "admin")
DJANGO_SUPERUSER_PASSWORD = os.getenv("DJANGO_SUPERUSER_PASSWORD", "admin12345")
DJANGO_SUPERUSER_EMAIL = os.getenv("DJANGO_SUPERUSER_EMAIL", "admin@example.com")

CELERY_BROKER_URL = os.getenv("CELERY_BROKER_URL", "redis://localhost:6379/0")
CELERY_RESULT_BACKEND = os.getenv("CELERY_RESULT_BACKEND", "redis://localhost:6379/1")

AI_CREDENTIAL_ENCRYPTION_KEY = os.getenv("AI_CREDENTIAL_ENCRYPTION_KEY", "")
INTERNAL_MCP_TOKEN = os.getenv("INTERNAL_MCP_TOKEN", "")
METRICS_TOKEN = os.getenv("METRICS_TOKEN", "")
AI_RUN_RETENTION_DAYS = int(os.getenv("AI_RUN_RETENTION_DAYS", "90"))
AI_SLOW_RUN_THRESHOLD_SECONDS = int(os.getenv("AI_SLOW_RUN_THRESHOLD_SECONDS", "20"))
AI_AGENT_MODEL_TIMEOUT_SECONDS = int(os.getenv("AI_AGENT_MODEL_TIMEOUT_SECONDS", "20"))
KNOWLEDGE_EMBEDDING_DEPLOYMENT_ID = int(
    os.getenv("KNOWLEDGE_EMBEDDING_DEPLOYMENT_ID", "0")
)
KNOWLEDGE_EMBEDDING_DIMENSIONS = int(os.getenv("KNOWLEDGE_EMBEDDING_DIMENSIONS", "1536"))
KNOWLEDGE_EMBEDDING_ALLOW_HASH_FALLBACK = (
    os.getenv("KNOWLEDGE_EMBEDDING_ALLOW_HASH_FALLBACK", "false").lower() == "true"
)
KNOWLEDGE_RETRIEVAL_TEXT_WEIGHT = float(
    os.getenv("KNOWLEDGE_RETRIEVAL_TEXT_WEIGHT", "0.45")
)
KNOWLEDGE_RETRIEVAL_VECTOR_WEIGHT = float(
    os.getenv("KNOWLEDGE_RETRIEVAL_VECTOR_WEIGHT", "0.35")
)
KNOWLEDGE_RETRIEVAL_SCOPE_WEIGHT = float(
    os.getenv("KNOWLEDGE_RETRIEVAL_SCOPE_WEIGHT", "0.20")
)
KNOWLEDGE_RERANK_DEPLOYMENT_ID = int(os.getenv("KNOWLEDGE_RERANK_DEPLOYMENT_ID", "0"))
KNOWLEDGE_RERANK_CANDIDATE_LIMIT = int(
    os.getenv("KNOWLEDGE_RERANK_CANDIDATE_LIMIT", "30")
)
KNOWLEDGE_RERANK_MODEL_WEIGHT = float(os.getenv("KNOWLEDGE_RERANK_MODEL_WEIGHT", "0.60"))
TICKET_AUTO_RESOLVE_ENABLED = (
    os.getenv("TICKET_AUTO_RESOLVE_ENABLED", "false").lower() == "true"
)
TICKET_AUTO_RESOLVE_MIN_SCORE = float(
    os.getenv("TICKET_AUTO_RESOLVE_MIN_SCORE", "0.85")
)
WORK_ITEM_DEFAULT_SLA_HOURS = int(os.getenv("WORK_ITEM_DEFAULT_SLA_HOURS", "24"))
WORK_ITEM_INTAKE_FAILURE_SLA_HOURS = int(
    os.getenv("WORK_ITEM_INTAKE_FAILURE_SLA_HOURS", "4")
)
WORK_ITEM_SUPPORT_FAILURE_SLA_HOURS = int(
    os.getenv("WORK_ITEM_SUPPORT_FAILURE_SLA_HOURS", "4")
)
WORK_ITEM_CUSTOMER_REPLY_SLA_HOURS = int(
    os.getenv("WORK_ITEM_CUSTOMER_REPLY_SLA_HOURS", "8")
)
WORK_ITEM_TICKET_CLOSE_SLA_HOURS = int(
    os.getenv("WORK_ITEM_TICKET_CLOSE_SLA_HOURS", "24")
)
TICKET_DRAFT_RETENTION_HOURS = int(os.getenv("TICKET_DRAFT_RETENTION_HOURS", "24"))
TICKET_MATERIAL_MAX_FILE_BYTES = int(
    os.getenv("TICKET_MATERIAL_MAX_FILE_BYTES", str(20 * 1024 * 1024))
)
TICKET_MATERIAL_MAX_FILES = int(os.getenv("TICKET_MATERIAL_MAX_FILES", "10"))
TICKET_MATERIAL_MAX_TOTAL_BYTES = int(
    os.getenv("TICKET_MATERIAL_MAX_TOTAL_BYTES", str(100 * 1024 * 1024))
)
TICKET_MATERIAL_MAX_PARSED_CHARS = int(
    os.getenv("TICKET_MATERIAL_MAX_PARSED_CHARS", "200000")
)
TICKET_MATERIAL_SCANNER_BACKEND = os.getenv("TICKET_MATERIAL_SCANNER_BACKEND", "clamav")
CLAMAV_HOST = os.getenv("CLAMAV_HOST", "localhost")
CLAMAV_PORT = int(os.getenv("CLAMAV_PORT", "3310"))
CLAMAV_TIMEOUT_SECONDS = int(os.getenv("CLAMAV_TIMEOUT_SECONDS", "30"))

MINIO_ENDPOINT = os.getenv("MINIO_ENDPOINT", "localhost:9000")
MINIO_ACCESS_KEY = os.getenv("MINIO_ACCESS_KEY", os.getenv("MINIO_ROOT_USER", "minio"))
MINIO_SECRET_KEY = os.getenv("MINIO_SECRET_KEY", os.getenv("MINIO_ROOT_PASSWORD", "minio123"))
MINIO_BUCKET = os.getenv("MINIO_BUCKET", "ai-ticket-platform")
MINIO_SECURE = os.getenv("MINIO_SECURE", "false").lower() == "true"

CELERY_BEAT_SCHEDULE = {
    "cleanup-expired-agent-runs": {
        "task": "apps.agents.tasks.cleanup_expired_agent_runs",
        "schedule": 86400.0,
    },
    "cleanup-expired-ticket-drafts": {
        "task": "apps.tickets.tasks.cleanup_expired_ticket_drafts",
        "schedule": 3600.0,
    },
}