package config

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

type Config struct {
	MySQLDSN                 string
	RedisAddr                string
	RedisPassword            string
	RedisDB                  int
	JavaOtherBaseURL         string
	WeekStarDefaultSysOrigin string
	WeekStarTimezone         string
	WeekStarSettleInterval   time.Duration
	Timeout                  time.Duration
	ShutdownTimeout          time.Duration
	AutoMigrate              bool
}

func Load() Config {
	return Config{
		MySQLDSN:                 firstEnv("CRON_MYSQL_DSN", "INVITE_MYSQL_DSN", "root:root@tcp(127.0.0.1:3306)/chatapp3?charset=utf8mb4&parseTime=True&loc=Local"),
		RedisAddr:                firstEnv("CRON_REDIS_ADDR", "INVITE_REDIS_ADDR", "127.0.0.1:6379"),
		RedisPassword:            firstEnv("CRON_REDIS_PASSWORD", "INVITE_REDIS_PASSWORD", ""),
		RedisDB:                  getEnvInt("CRON_REDIS_DB", getEnvInt("INVITE_REDIS_DB", 0)),
		JavaOtherBaseURL:         firstEnv("CRON_JAVA_OTHER_BASE_URL", "GAME_JAVA_OTHER_BASE_URL", "INVITE_JAVA_APP_BASE_URL", "http://127.0.0.1:2400"),
		WeekStarDefaultSysOrigin: strings.ToUpper(firstEnv("WEEK_STAR_DEFAULT_SYS_ORIGIN", "", "LIKEI")),
		WeekStarTimezone:         firstEnv("WEEK_STAR_TIMEZONE", "", "Asia/Riyadh"),
		WeekStarSettleInterval:   time.Duration(getEnvInt("WEEK_STAR_SETTLE_INTERVAL_SECONDS", 60)) * time.Second,
		Timeout:                  time.Duration(getEnvInt("CRON_HTTP_TIMEOUT_SECONDS", getEnvInt("INVITE_HTTP_TIMEOUT_SECONDS", 8))) * time.Second,
		ShutdownTimeout:          time.Duration(getEnvInt("CRON_SHUTDOWN_TIMEOUT_SECONDS", getEnvInt("INVITE_HTTP_SHUTDOWN_TIMEOUT_SECONDS", 30))) * time.Second,
		AutoMigrate:              getEnvBool("CRON_AUTO_MIGRATE", getEnvBool("INVITE_AUTO_MIGRATE", false)),
	}
}

func firstEnv(keys ...string) string {
	if len(keys) == 0 {
		return ""
	}
	for _, key := range keys[:len(keys)-1] {
		if strings.TrimSpace(key) == "" {
			continue
		}
		if value := strings.TrimSpace(os.Getenv(key)); value != "" {
			return value
		}
	}
	return keys[len(keys)-1]
}

func getEnvInt(key string, fallback int) int {
	value := strings.TrimSpace(os.Getenv(key))
	if value == "" {
		return fallback
	}
	parsed, err := strconv.Atoi(value)
	if err != nil {
		return fallback
	}
	return parsed
}

func getEnvBool(key string, fallback bool) bool {
	value := strings.TrimSpace(os.Getenv(key))
	if value == "" {
		return fallback
	}
	parsed, err := strconv.ParseBool(value)
	if err != nil {
		return fallback
	}
	return parsed
}