package config

import "os"

type Config struct {
	ServerPort string
	JWTSecret  string
	CORSOrigin string

	// PostgreSQL configuration
	PostgresHost     string
	PostgresPort     string
	PostgresUser     string
	PostgresPassword string
	PostgresDB       string
	PostgresSSLMode  string

	// Neo4j configuration
	Neo4jURI      string
	Neo4jUsername string
	Neo4jPassword string
	Neo4jDatabase string
	Neo4jEnabled  bool

	// Redis configuration
	RedisURL string

	// Ollama configuration
	OllamaURL      string
	OllamaModel    string
	OllamaUsername string
	OllamaPassword string

	// Google Maps API configuration
	GoogleMapsAPIKey      string
	GoogleCloudProjectID  string
}

func Load() *Config {
	return &Config{
		ServerPort: getEnv("SERVER_PORT", "8080"),
		JWTSecret:  getEnv("JWT_SECRET", "your-secret-key-change-in-production"),
		CORSOrigin: getEnv("CORS_ORIGIN", "http://localhost:3000"),

		// PostgreSQL defaults
		PostgresHost:     getEnv("POSTGRES_HOST", "localhost"),
		PostgresPort:     getEnv("POSTGRES_PORT", "5432"),
		PostgresUser:     getEnv("POSTGRES_USER", "bugulma"),
		PostgresPassword: getEnv("POSTGRES_PASSWORD", "bugulma"),
		PostgresDB:       getEnv("POSTGRES_DB", "bugulma_city"),
		PostgresSSLMode:  getEnv("POSTGRES_SSLMODE", "disable"),

		// Neo4j defaults (disabled by default)
		Neo4jURI:      getEnv("NEO4J_URI", "neo4j://localhost:7687"),
		Neo4jUsername: getEnv("NEO4J_USERNAME", "neo4j"),
		Neo4jPassword: getEnv("NEO4J_PASSWORD", "password"),
		Neo4jDatabase: getEnv("NEO4J_DATABASE", "neo4j"),
		Neo4jEnabled:  getEnv("NEO4J_ENABLED", "false") == "true",

		// Redis defaults
		RedisURL: getEnv("REDIS_URL", "redis://localhost:6379"),

		// Ollama defaults
		OllamaURL:      getEnv("OLLAMA_URL", "http://localhost:11434"),
		OllamaModel:    getEnv("OLLAMA_MODEL", "qwen2.5:7b"),
		OllamaUsername: getEnv("OLLAMA_USERNAME", ""),
		OllamaPassword: getEnv("OLLAMA_PASSWORD", ""),

		// Google Maps API defaults
		GoogleMapsAPIKey:     getEnv("GOOGLE_KG_API_KEY", ""), // Reuse KG API key if it works for Geocoding
		GoogleCloudProjectID:  getEnv("GOOGLE_CLOUD_PROJECT_ID", ""),
	}
}

func getEnv(key, fallback string) string {
	if value := os.Getenv(key); value != "" {
		return value
	}
	return fallback
}