package main

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

type Config struct {
	Token                  string
	AppID                  string
	GuildID                string
	PublicOrderChannelID   string
	InternalOrderChannelID string
	AuditChannelID         string
	AdminRoleIDs           []string
	TeamRoleIDs            []string
	DatabasePath           string
	ThreadDeleteAfter      time.Duration
}

func loadConfig() Config {
	cfg := Config{
		Token:                  os.Getenv("DISCORD_TOKEN"),
		AppID:                  os.Getenv("DISCORD_APP_ID"),
		GuildID:                os.Getenv("DISCORD_GUILD_ID"),
		PublicOrderChannelID:   getenv("DISCORD_PUBLIC_ORDER_CHANNEL_ID", os.Getenv("DISCORD_ORDER_CHANNEL_ID")),
		InternalOrderChannelID: getenv("DISCORD_INTERNAL_ORDER_CHANNEL_ID", getenv("DISCORD_ORDER_CHANNEL_ID", "")),
		AuditChannelID:         os.Getenv("DISCORD_AUDIT_CHANNEL_ID"),
		AdminRoleIDs:           splitCSV(os.Getenv("DISCORD_ADMIN_ROLE_IDS")),
		TeamRoleIDs:            splitCSV(os.Getenv("DISCORD_TEAM_ROLE_IDS")),
		DatabasePath:           getenv("DATABASE_PATH", "orders.db"),
		ThreadDeleteAfter:      durationHoursEnv("THREAD_DELETE_AFTER_HOURS", 72),
	}
	if cfg.Token == "" || cfg.AppID == "" || cfg.InternalOrderChannelID == "" {
		log.Fatal("Bitte DISCORD_TOKEN, DISCORD_APP_ID und DISCORD_INTERNAL_ORDER_CHANNEL_ID setzen")
	}
	if len(cfg.AdminRoleIDs) == 0 {
		log.Println("WARNUNG: DISCORD_ADMIN_ROLE_IDS ist leer. Admin-Kommandos sind nur fuer Server-Administratoren verfuegbar.")
	}
	return cfg
}

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

func splitCSV(v string) []string {
	var out []string
	for _, p := range strings.Split(v, ",") {
		p = strings.TrimSpace(p)
		if p != "" {
			out = append(out, p)
		}
	}
	return out
}

func durationHoursEnv(key string, fallbackHours int) time.Duration {
	v := strings.TrimSpace(os.Getenv(key))
	if v == "" {
		return time.Duration(fallbackHours) * time.Hour
	}
	hours, err := strconv.Atoi(v)
	if err != nil || hours < 0 {
		log.Printf("WARNUNG: %s ist ungültig, verwende %d Stunden", key, fallbackHours)
		return time.Duration(fallbackHours) * time.Hour
	}
	return time.Duration(hours) * time.Hour
}