package config

import (
	"fmt"
	"os"
	"strings"
)

type Config struct {
	Port               string
	AppURL             string
	AutheliaURL        string
	AutheliaInternalURL string
	StripeSecretKey     string
	StripeWebhookSecret string
	StripePriceID      string // Fallback when tier prices not set
	StripePaymentLink  string // Optional: legacy Payment Link for $0
	StripePriceIDFree   string // $0/3mo, auto-cancel (first 10)
	StripePriceIDYear   string // $20/year (customers 11–50)
	StripePriceIDMonth100 string // $100/month (after year for 11–50)
	StripePriceIDMonth200 string // $200/month (customers 51+)
	FreeTierLimit       int    // First N get free tier (default 10)
	YearTierLimit       int    // Up to this count get year tier (default 50)
	MaxSignups          int    // Cap on new signups (0 = no limit)
	LDAPUrl            string
	LDAPAdminDN        string
	LDAPAdminPassword  string
	LDAPBaseDN         string
	LLDAPHttpURL       string
	DockerHost         string
	TraefikDomain      string
	TraefikNetwork     string
	TemplatePath    string
	CustomerDomain  string
	ArchivePath     string
	LandingTagline  string   // Main tagline under logo
	LandingFeatures []string // Bullet points on subscribe card (comma-separated in env)
}

func Load() *Config {
	return &Config{
		Port:               envOrDefault("PORT", "8080"),
		AppURL:             envOrDefault("APP_URL", "https://bc.a250.ca"),
		AutheliaURL:        envOrDefault("AUTHELIA_URL", "https://bc.a250.ca/login"),
		AutheliaInternalURL: envOrDefault("AUTHELIA_INTERNAL_URL", "http://authelia_dev_main:9091/login"),
		StripeSecretKey:      envOrDefault("STRIPE_SECRET_KEY", ""),
		StripeWebhookSecret:  envOrDefault("STRIPE_WEBHOOK_SECRET", ""),
		StripePriceID:       envOrDefault("STRIPE_PRICE_ID", ""),
		StripePaymentLink:   envOrDefault("STRIPE_PAYMENT_LINK", ""),
		StripePriceIDFree:   envOrDefault("STRIPE_PRICE_ID_FREE", ""),
		StripePriceIDYear:   envOrDefault("STRIPE_PRICE_ID_YEAR", ""),
		StripePriceIDMonth100: envOrDefault("STRIPE_PRICE_ID_MONTH_100", ""),
		StripePriceIDMonth200: envOrDefault("STRIPE_PRICE_ID_MONTH_200", ""),
		FreeTierLimit:       envIntOrDefault("FREE_TIER_LIMIT", 10),
		YearTierLimit:       envIntOrDefault("YEAR_TIER_LIMIT", 50),
		MaxSignups:          envIntOrDefault("MAX_SIGNUPS", 0),
		LDAPUrl:             envOrDefault("LLDAP_URL", "ldap://lldap_lldap:3890"),
		LDAPAdminDN:         envOrDefault("LLDAP_ADMIN_DN", "uid=admin,ou=people,dc=a250,dc=ca"),
		LDAPAdminPassword:   envOrDefault("LLDAP_ADMIN_PASSWORD", ""),
		LDAPBaseDN:          envOrDefault("LLDAP_BASE_DN", "dc=a250,dc=ca"),
		LLDAPHttpURL:        envOrDefault("LLDAP_HTTP_URL", "http://lldap:17170"),
		DockerHost:          envOrDefault("DOCKER_HOST", "unix:///var/run/docker.sock"),
		TraefikDomain:       envOrDefault("TRAEFIK_DOMAIN", "bc.a250.ca"),
		TraefikNetwork:      envOrDefault("TRAEFIK_NETWORK", "authelia_dev"),
		TemplatePath:   envOrDefault("TEMPLATE_PATH", "/app/templates"),
		CustomerDomain: envOrDefault("CUSTOMER_DOMAIN", "bc.a250.ca"),
		ArchivePath:    envOrDefault("ARCHIVE_PATH", "/archives"),
		LandingTagline: envOrDefault("LANDING_TAGLINE",
			"Your own workspace, ready in minutes."),
		LandingFeatures: envListOrDefault("LANDING_FEATURES",
			[]string{"Dedicated environment", "Secure single sign-on", "Automatic provisioning", "Manage subscription anytime"}),
	}
}

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

func envIntOrDefault(key string, fallback int) int {
	if v := os.Getenv(key); v != "" {
		var n int
		if _, err := fmt.Sscanf(v, "%d", &n); err == nil {
			return n
		}
	}
	return fallback
}

func envListOrDefault(key string, fallback []string) []string {
	if v := os.Getenv(key); v != "" {
		parts := strings.Split(v, "|")
		out := make([]string, 0, len(parts))
		for _, p := range parts {
			if s := strings.TrimSpace(p); s != "" {
				out = append(out, s)
			}
		}
		if len(out) > 0 {
			return out
		}
	}
	return fallback
}