package config

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

// Google Sheets IDs — change in code if sheets change (not from env).
const (
	AttendanceSheetID = "1E2e_gT_K5AwSRCDLDTa2UetZTkHmBOcz0kFbBUNUNBA"
	PaymentsSheetID   = "1Om0YPoDVCH5cV8BrNz5LG5eR5MMU05ypQC7UMN1xn_Y"
	JuniorSheetGID    = "1213318614"
)

// Config holds all runtime configuration loaded from environment variables.
// Mirrors scripts/config.py.
type Config struct {
	CredentialsPath  string
	BankAccount      string
	CacheTTL         time.Duration
	CacheAPICheckTTL time.Duration
	LogLevel         string
	FioAPIToken      string
	ServerAddr       string
}

// Load reads configuration from the environment, applying defaults that
// match the Python side.
func Load() Config {
	return Config{
		CredentialsPath:  env("CREDENTIALS_PATH", ".secret/fuj-management-bot-credentials.json"),
		BankAccount:      env("BANK_ACCOUNT", "CZ8520100000002800359168"),
		CacheTTL:         envDuration("CACHE_TTL_SECONDS", 300),
		CacheAPICheckTTL: envDuration("CACHE_API_CHECK_TTL_SECONDS", 300),
		LogLevel:         env("LOG_LEVEL", "INFO"),
		FioAPIToken:      env("FIO_API_TOKEN", ""),
		ServerAddr:       env("SERVER_ADDR", ":8080"),
	}
}

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

func envDuration(key string, defaultSeconds int) time.Duration {
	if v := os.Getenv(key); v != "" {
		if n, err := strconv.Atoi(v); err == nil && n > 0 {
			return time.Duration(n) * time.Second
		}
	}
	return time.Duration(defaultSeconds) * time.Second
}