package config

import (
	"errors"
	"os"
)

type Config struct {
	HTTPAddr           string
	DatabaseURL        string
	AdminToken         string
	GiteaWebhookSecret string
	GiteaBaseURL       string
	GiteaAPIToken      string
}

func Load() (Config, error) {
	cfg := Config{
		HTTPAddr:           value("HOP_HTTP_ADDR", ":8080"),
		DatabaseURL:        os.Getenv("HOP_DATABASE_URL"),
		AdminToken:         os.Getenv("HOP_ADMIN_TOKEN"),
		GiteaWebhookSecret: os.Getenv("HOP_GITEA_WEBHOOK_SECRET"),
		GiteaBaseURL:       value("GITEA_BASE_URL", "http://localhost:3000"),
		GiteaAPIToken:      os.Getenv("GITEA_API_TOKEN"),
	}

	if cfg.DatabaseURL == "" {
		return Config{}, errors.New("HOP_DATABASE_URL is required")
	}
	if cfg.AdminToken == "" {
		return Config{}, errors.New("HOP_ADMIN_TOKEN is required")
	}
	if len(cfg.AdminToken) < 16 {
		return Config{}, errors.New("HOP_ADMIN_TOKEN must be at least 16 characters")
	}
	if cfg.GiteaWebhookSecret == "" {
		return Config{}, errors.New("HOP_GITEA_WEBHOOK_SECRET is required")
	}
	if len(cfg.GiteaWebhookSecret) < 16 {
		return Config{}, errors.New("HOP_GITEA_WEBHOOK_SECRET must be at least 16 characters")
	}
	return cfg, nil
}

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