package config

import (
	"os"
	"strconv"
	"strings"
	"time"

	"github.com/joho/godotenv"
)

type Config struct {
	Environment string
	LogLevel    string

	// Service ports
	APIGatewayPort int
	ChatSvcPort    int
	AgentSvcPort   int
	SearchSvcPort  int
	LLMSvcPort     int
	ScraperSvcPort int
	AdminSvcPort   int

	// Service URLs
	ChatSvcURL    string
	AgentSvcURL   string
	SearchSvcURL  string
	LLMSvcURL     string
	ScraperSvcURL string
	MemorySvcURL  string
	LibrarySvcURL string
	AdminSvcURL   string

	// External services
	SearXNGURL         string
	SearXNGFallbackURL []string
	Crawl4AIURL        string
	RedisURL           string
	DatabaseURL        string
	DiscoverSvcURL     string
	CollectionSvcURL   string
	FileSvcURL         string
	ThreadSvcURL        string
	ComputerSvcURL      string
	FinanceHeatmapURL   string
	LearningSvcURL      string
	TravelSvcURL        string
	SandboxSvcURL       string
	MedicineSvcURL      string

	// TravelPayouts
	TravelPayoutsToken  string
	TravelPayoutsMarker string

	// MinIO / S3 storage
	MinioEndpoint  string
	MinioAccessKey string
	MinioSecretKey string
	MinioBucket    string
	MinioUseSSL    bool
	MinioPublicURL string

	// Auth
	JWTSecret    string
	AuthSvcURL   string

	// LLM defaults
	DefaultLLMProvider string
	DefaultLLMModel    string
	OpenAIAPIKey       string
	AnthropicAPIKey    string
	GeminiAPIKey       string

	// Timeweb Cloud AI
	TimewebAPIBaseURL     string
	TimewebAgentAccessID  string
	TimewebAPIKey         string
	TimewebProxySource    string

	// Ollama (local LLM)
	OllamaBaseURL        string
	OllamaModelKey       string
	OllamaEmbeddingModel string
	OllamaNumParallel    int
	OllamaAPIToken       string

	// Timeouts
	HTTPTimeout     time.Duration
	LLMTimeout      time.Duration
	ScrapeTimeout   time.Duration
	SearchTimeout   time.Duration

	// CORS
	AllowedOrigins []string
}

var cfg *Config

func Load() (*Config, error) {
	_ = godotenv.Load()
	_ = godotenv.Load("../.env")
	_ = godotenv.Load("../../.env")

	cfg = &Config{
		Environment: getEnv("ENVIRONMENT", "production"),
		LogLevel:    getEnv("LOG_LEVEL", "info"),

		APIGatewayPort: getEnvInt("API_GATEWAY_PORT", 3015),
		ChatSvcPort:    getEnvInt("CHAT_SVC_PORT", 3005),
		AgentSvcPort:   getEnvInt("AGENT_SVC_PORT", 3018),
		SearchSvcPort:  getEnvInt("SEARCH_SVC_PORT", 3001),
		LLMSvcPort:     getEnvInt("LLM_SVC_PORT", 3020),
		ScraperSvcPort: getEnvInt("SCRAPER_SVC_PORT", 3021),
		AdminSvcPort:   getEnvInt("ADMIN_SVC_PORT", 3040),

		ChatSvcURL:    getEnv("CHAT_SVC_URL", "http://localhost:3005"),
		AgentSvcURL:   getEnv("MASTER_AGENTS_SVC_URL", "http://localhost:3018"),
		SearchSvcURL:  getEnv("SEARCH_SVC_URL", "http://localhost:3001"),
		LLMSvcURL:     getEnv("LLM_SVC_URL", "http://localhost:3020"),
		ScraperSvcURL: getEnv("SCRAPER_SVC_URL", "http://localhost:3021"),
		MemorySvcURL:  getEnv("MEMORY_SVC_URL", ""),
		LibrarySvcURL: getEnv("LIBRARY_SVC_URL", "http://localhost:3009"),
		AdminSvcURL:   getEnv("ADMIN_SVC_URL", "http://localhost:3040"),

		SearXNGURL:         getEnv("SEARXNG_URL", "http://searxng:8080"),
		SearXNGFallbackURL: strings.Split(getEnv("SEARXNG_FALLBACK_URL", ""), ","),
		Crawl4AIURL:        getEnv("CRAWL4AI_URL", "http://crawl4ai:11235"),
		RedisURL:           getEnv("REDIS_URL", "redis://localhost:6379"),
		DatabaseURL:        getEnv("DATABASE_URL", ""),
		DiscoverSvcURL:     getEnv("DISCOVER_SVC_URL", "http://localhost:3002"),
		CollectionSvcURL:   getEnv("COLLECTION_SVC_URL", "http://localhost:3025"),
		FileSvcURL:         getEnv("FILE_SVC_URL", "http://localhost:3026"),
		ThreadSvcURL:        getEnv("THREAD_SVC_URL", "http://localhost:3027"),
		ComputerSvcURL:      getEnv("COMPUTER_SVC_URL", "http://localhost:3030"),
		FinanceHeatmapURL:   getEnv("FINANCE_HEATMAP_SVC_URL", "http://localhost:3033"),
		LearningSvcURL:      getEnv("LEARNING_SVC_URL", "http://localhost:3034"),
		TravelSvcURL:        getEnv("TRAVEL_SVC_URL", "http://localhost:3035"),
		SandboxSvcURL:       getEnv("SANDBOX_SVC_URL", "http://localhost:3036"),
		MedicineSvcURL:      getEnv("MEDICINE_SVC_URL", "http://localhost:3037"),

		TravelPayoutsToken:  getEnv("TRAVELPAYOUTS_TOKEN", ""),
		TravelPayoutsMarker: getEnv("TRAVELPAYOUTS_MARKER", ""),

		MinioEndpoint:  getEnv("MINIO_ENDPOINT", getEnv("S3_ENDPOINT", "minio:9000")),
		MinioAccessKey: getEnv("MINIO_ACCESS_KEY", getEnv("S3_ACCESS_KEY", "minioadmin")),
		MinioSecretKey: getEnv("MINIO_SECRET_KEY", getEnv("S3_SECRET_KEY", "minioadmin")),
		MinioBucket:    getEnv("MINIO_BUCKET", getEnv("S3_BUCKET", "gooseek")),
		MinioUseSSL:    getEnv("MINIO_USE_SSL", getEnv("S3_USE_SSL", "false")) == "true",
		MinioPublicURL: getEnv("MINIO_PUBLIC_URL", getEnv("S3_PUBLIC_URL", "")),

		JWTSecret:  getEnv("JWT_SECRET", ""),
		AuthSvcURL: getEnv("AUTH_SVC_URL", ""),

		DefaultLLMProvider: getEnv("DEFAULT_LLM_PROVIDER", "openai"),
		DefaultLLMModel:    getEnv("DEFAULT_LLM_MODEL", "gpt-4o-mini"),
		OpenAIAPIKey:       getEnv("OPENAI_API_KEY", ""),
		AnthropicAPIKey:    getEnv("ANTHROPIC_API_KEY", ""),
		GeminiAPIKey:       getEnv("GEMINI_API_KEY", ""),

		TimewebAPIBaseURL:    getEnv("TIMEWEB_API_BASE_URL", "https://api.timeweb.cloud"),
		TimewebAgentAccessID: getEnv("TIMEWEB_AGENT_ACCESS_ID", ""),
		TimewebAPIKey:        getEnv("TIMEWEB_API_KEY", ""),
		TimewebProxySource:   getEnv("TIMEWEB_X_PROXY_SOURCE", "gooseek"),

		OllamaBaseURL:        getEnv("OLLAMA_BASE_URL", "http://ollama:11434"),
		OllamaModelKey:       getEnv("OLLAMA_MODEL", "qwen3.5:9b"),
		OllamaEmbeddingModel: getEnv("OLLAMA_EMBEDDING_MODEL", "qwen3-embedding:0.6b"),
		OllamaNumParallel:    getEnvInt("OLLAMA_NUM_PARALLEL", 2),
		OllamaAPIToken:       getEnv("OLLAMA_API_TOKEN", ""),

		HTTPTimeout:   time.Duration(getEnvInt("HTTP_TIMEOUT_MS", 60000)) * time.Millisecond,
		LLMTimeout:    time.Duration(getEnvInt("LLM_TIMEOUT_MS", 120000)) * time.Millisecond,
		ScrapeTimeout: time.Duration(getEnvInt("SCRAPE_TIMEOUT_MS", 25000)) * time.Millisecond,
		SearchTimeout: time.Duration(getEnvInt("SEARCH_TIMEOUT_MS", 10000)) * time.Millisecond,

		AllowedOrigins: parseOrigins(getEnv("ALLOWED_ORIGINS", "*")),
	}

	return cfg, nil
}

func Get() *Config {
	if cfg == nil {
		cfg, _ = Load()
	}
	return cfg
}

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

func getEnvInt(key string, defaultValue int) int {
	if value := os.Getenv(key); value != "" {
		if i, err := strconv.Atoi(value); err == nil {
			return i
		}
	}
	return defaultValue
}

func GetEnvInt(key string, defaultValue int) int {
	return getEnvInt(key, defaultValue)
}

func parseOrigins(s string) []string {
	if s == "*" {
		return []string{"*"}
	}
	origins := strings.Split(s, ",")
	result := make([]string, 0, len(origins))
	for _, o := range origins {
		if trimmed := strings.TrimSpace(o); trimmed != "" {
			result = append(result, trimmed)
		}
	}
	return result
}