package config

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

type Config struct {
	Host     string
	Port     string
	Database DatabaseConfig
	Valkey   ValkeyConfig
	Session  SessionConfig
}

type DatabaseConfig struct {
	Host     string
	Port     string
	User     string
	Password string
	Database string
}

type ValkeyConfig struct {
	URL string
}

type SessionConfig struct {
	CookieName string
	Duration   time.Duration
}

func Load() *Config {
	return &Config{
		Host: getEnv("DUMPSTER_HOST", "localhost"),
		Port: getEnv("DUMPSTER_PORT", "8080"),
		Database: DatabaseConfig{
			Host:     getEnv("POSTGRES_HOST", "localhost"),
			Port:     getEnv("POSTGRES_PORT", "5432"),
			User:     getEnv("POSTGRES_USER", "dumpster"),
			Password: getEnv("POSTGRES_PASSWORD", "dumpster"),
			Database: getEnv("POSTGRES_DB", "dumpster"),
		},
		Valkey: ValkeyConfig{
			URL: getEnv("VALKEY_URL", "redis://localhost:***@example.com"),
		},
		Session: SessionConfig{
			CookieName: getEnv("DUMPSTER_SESSION_COOKIE", "dumpster_session"),
			Duration:   time.Duration(getInt("DUMPSTER_SESSION_DAYS", 30)) * 24 * time.Hour,
		},
	}
}

func (c *Config) DatabaseDSN() string {
	return "postgres://" + c.Database.User + ":***@" + c.Database.Host + ":" + c.Database.Port + "/" + c.Database.Database + "?sslmode=disable"
}

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

func getBool(key string, fallback bool) bool {
	s := strings.ToLower(getEnv(key, ""))
	if s == "" {
		return fallback
	}
	return s == "true" || s == "1" || s == "yes"
}

func getInt(key string, fallback int) int {
	s := getEnv(key, "")
	if s == "" {
		return fallback
	}
	n, err := strconv.Atoi(s)
	if err != nil {
		return fallback
	}
	return n
}