"""
Configuration Module
Handles environment variables and application settings
"""

import os
from typing import List
from pydantic import field_validator
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Application settings loaded from environment variables"""
    
    # Database
    DATABASE_URL: str = "postgresql://bmc_hub:bmc_hub@localhost:5432/bmc_hub"
    
    # API
    API_HOST: str = "0.0.0.0"
    API_PORT: int = 8000
    API_RELOAD: bool = False
    ENABLE_RELOAD: bool = False  # Added to match docker-compose.yml

    # Elnet supplier lookup
    ELNET_API_BASE_URL: str = "https://api.elnet.greenpowerdenmark.dk/api"
    ELNET_TIMEOUT_SECONDS: int = 12
    
    # Security
    SECRET_KEY: str = "dev-secret-key-change-in-production"
    ALLOWED_ORIGINS: List[str] = ["http://localhost:8000", "http://localhost:3000"]
    CORS_ORIGINS: str = "http://localhost:8000,http://localhost:3000"
    
    # Logging
    LOG_LEVEL: str = "INFO"
    LOG_FILE: str = "logs/app.log"
    
    # e-conomic Integration
    ECONOMIC_ENABLED: bool = False
    ECONOMIC_API_URL: str = "https://restapi.e-conomic.com"
    ECONOMIC_APP_SECRET_TOKEN: str = ""
    ECONOMIC_AGREEMENT_GRANT_TOKEN: str = ""
    ECONOMIC_READ_ONLY: bool = True
    ECONOMIC_DRY_RUN: bool = True
    
    # Ollama LLM
    OLLAMA_ENDPOINT: str = "http://localhost:11434"
    OLLAMA_MODEL: str = "llama3.2:3b"
    
    # Email System Configuration
    # IMAP Settings
    IMAP_SERVER: str = ""
    IMAP_PORT: int = 993
    IMAP_USERNAME: str = ""
    IMAP_PASSWORD: str = ""
    IMAP_USE_SSL: bool = True
    IMAP_FOLDER: str = "INBOX"
    IMAP_READ_ONLY: bool = True
    
    # Microsoft Graph API (alternative to IMAP)
    USE_GRAPH_API: bool = False
    GRAPH_TENANT_ID: str = ""
    GRAPH_CLIENT_ID: str = ""
    GRAPH_CLIENT_SECRET: str = ""
    GRAPH_USER_EMAIL: str = ""
    
    # Email Processing Settings
    EMAIL_TO_TICKET_ENABLED: bool = False
    EMAIL_RULES_ENABLED: bool = True
    EMAIL_RULES_AUTO_PROCESS: bool = False
    EMAIL_AI_ENABLED: bool = False
    EMAIL_AUTO_CLASSIFY: bool = True  # Enable classification by default (uses keywords if AI disabled)
    EMAIL_AI_CONFIDENCE_THRESHOLD: float = 0.7
    EMAIL_MAX_FETCH_PER_RUN: int = 50
    EMAIL_PROCESS_INTERVAL_MINUTES: int = 5
    EMAIL_WORKFLOWS_ENABLED: bool = True
    EMAIL_MAX_UPLOAD_SIZE_MB: int = 50  # Max file size for email uploads
    ALLOWED_EXTENSIONS: List[str] = ["pdf", "jpg", "jpeg", "png", "gif", "doc", "docx", "xls", "xlsx", "zip"]  # Allowed file extensions for uploads
    
    # vTiger Cloud Integration
    VTIGER_ENABLED: bool = False
    VTIGER_URL: str = ""
    VTIGER_USERNAME: str = ""
    VTIGER_API_KEY: str = ""
    
    # Data Consistency Settings
    VTIGER_SYNC_ENABLED: bool = True
    ECONOMIC_SYNC_ENABLED: bool = True
    AUTO_CHECK_CONSISTENCY: bool = True
    
    # Time Tracking Module Settings
    TIMETRACKING_DEFAULT_HOURLY_RATE: float = 1200.00
    TIMETRACKING_AUTO_ROUND: bool = True
    TIMETRACKING_ROUND_INCREMENT: float = 0.5
    TIMETRACKING_ROUND_METHOD: str = "up"  # "up", "down", "nearest"
    
    # Time Tracking Module Safety Flags
    TIMETRACKING_VTIGER_READ_ONLY: bool = True
    TIMETRACKING_VTIGER_DRY_RUN: bool = True
    TIMETRACKING_ECONOMIC_READ_ONLY: bool = True
    TIMETRACKING_ECONOMIC_DRY_RUN: bool = True
    TIMETRACKING_EXPORT_TYPE: str = "draft"  # "draft" or "booked"
    TIMETRACKING_ECONOMIC_LAYOUT: int = 19  # e-conomic invoice layout number (default: 19 = Danish standard)
    TIMETRACKING_ECONOMIC_PRODUCT: str = "1000"  # e-conomic product number for time entries (default: 1000)
    
    # Simply-CRM (Old vTiger On-Premise)
    OLD_VTIGER_URL: str = ""
    OLD_VTIGER_USERNAME: str = ""
    OLD_VTIGER_API_KEY: str = ""
    
    # Simply-CRM (Separate System)
    SIMPLYCRM_URL: str = ""
    SIMPLYCRM_USERNAME: str = ""
    SIMPLYCRM_API_KEY: str = ""
    
    # Backup System Configuration
    BACKUP_ENABLED: bool = True
    BACKUP_STORAGE_PATH: str = "/app/backups"
    BACKUP_DRY_RUN: bool = False
    BACKUP_READ_ONLY: bool = False
    BACKUP_RESTORE_DRY_RUN: bool = True  # SAFETY: Test restore uden at overskrive data
    BACKUP_RETENTION_DAYS: int = 30
    BACKUP_RETENTION_MONTHLY: int = 12
    BACKUP_MAX_SIZE_GB: int = 100
    STORAGE_WARNING_THRESHOLD_PCT: int = 80
    DB_DAILY_FORMAT: str = "dump"  # Compressed format for daily backups
    DB_MONTHLY_FORMAT: str = "sql"  # Plain SQL for monthly backups
    BACKUP_INCLUDE_UPLOADS: bool = True  # Include uploads/ in file backups
    BACKUP_INCLUDE_LOGS: bool = True     # Include logs/ in file backups
    BACKUP_INCLUDE_DATA: bool = True     # Include data/ in file backups
    UPLOAD_DIR: str = "uploads"          # Upload directory path
    
    # Offsite Backup Settings (SFTP)
    OFFSITE_ENABLED: bool = False
    OFFSITE_WEEKLY_DAY: str = "sunday"
    OFFSITE_RETRY_DELAY_HOURS: int = 1
    OFFSITE_RETRY_MAX_ATTEMPTS: int = 3
    SFTP_HOST: str = ""
    SFTP_PORT: int = 22
    SFTP_USER: str = ""
    SFTP_PASSWORD: str = ""
    SFTP_REMOTE_PATH: str = "/backups"
    SSH_KEY_PATH: str = ""
    
    # Mattermost Notifications
    MATTERMOST_WEBHOOK_URL: str = ""
    MATTERMOST_ENABLED: bool = False
    MATTERMOST_CHANNEL: str = ""
    
    # Deployment Configuration (used by Docker/Podman)
    POSTGRES_USER: str = "bmc_hub"
    POSTGRES_PASSWORD: str = "bmc_hub"
    POSTGRES_DB: str = "bmc_hub"
    POSTGRES_PORT: int = 5432
    CONTAINER_RUNTIME: str = "docker"
    RELEASE_VERSION: str = "latest"
    GITEA_URL: str = "https://g.bmcnetworks.dk"
    GITHUB_TOKEN: str = ""
    GITHUB_REPO: str = "ct/bmc_hub"

    # Whisper Transcription
    WHISPER_ENABLED: bool = True
    WHISPER_API_URL: str = "http://172.16.31.115:5000/transcribe"
    WHISPER_TIMEOUT: int = 300
    WHISPER_SUPPORTED_FORMATS: List[str] = [".mp3", ".wav", ".m4a", ".ogg"]
    
    @field_validator('*', mode='before')
    @classmethod
    def strip_whitespace(cls, v):
        """Strip leading/trailing whitespace from string values"""
        if isinstance(v, str):
            return v.strip()
        return v
    
    class Config:
        env_file = ".env"
        case_sensitive = True


settings = Settings()