package app

import (
	"errors"
	"os"
	"strconv"
	"strings"
)

func loadConfig() (Config, error) {
	cfg := Config{
		DatabaseURL:            getenv("DATABASE_URL", "postgres://postgres:postgres@localhost:5432/box?sslmode=disable"),
		ListenAddr:             getenv("LISTEN_ADDR", ":8080"),
		UnixSocketPath:         getenv("UNIX_SOCKET_PATH", ""),
		DevMode:                getenvBool("DEV_MODE", true),
		DemoUser:               getenv("DEV_DEMO_USER", "demo"),
		DemoEmail:              getenv("DEV_DEMO_EMAIL", "demo@example.local"),
		AuthHeaderUser:         getenv("AUTH_HEADER_USER", "X-authentik-username"),
		AuthHeaderEmail:        getenv("AUTH_HEADER_EMAIL", "X-authentik-email"),
		OIDCIssuerURL:          strings.TrimRight(getenv("OIDC_ISSUER_URL", ""), "/"),
		OIDCAudience:           strings.TrimSpace(getenv("OIDC_AUDIENCE", "")),
		ForgejoBaseURL:         strings.TrimRight(getenv("FORGEJO_BASE_URL", ""), "/"),
		ForgejoToken:           getenv("FORGEJO_TOKEN", ""),
		ForgejoGitUsername:     getenv("FORGEJO_GIT_USERNAME", "oauth2"),
		ForgejoOrg:             getenv("FORGEJO_ORG", ""),
		DBProvisionAdminURL:    getenv("DB_PROVISION_ADMIN_URL", ""),
		DBProvisionEnabled:     getenvBool("DB_PROVISION_ENABLED", true),
		CaddyAdminURL:          strings.TrimRight(getenv("CADDY_ADMIN_URL", "http://localhost:2019"), "/"),
		CaddyServerID:          getenv("CADDY_SERVER_ID", "srv0"),
		CaddyDomainSuffix:      getenv("CADDY_DOMAIN_SUFFIX", ""),
		CaddyRouteEnabled:      getenvBool("CADDY_ROUTE_ENABLED", false),
		CaddyAuthEnabled:       getenvBool("CADDY_AUTH_ENABLED", true),
		CaddyAuthUpstream:      getenv("CADDY_AUTH_UPSTREAM", "localhost:9000"),
		CaddyAuthURI:           getenv("CADDY_AUTH_URI", "/outpost.goauthentik.io/auth/caddy"),
		CaddyPersistConfigPath: strings.TrimSpace(getenv("CADDY_PERSIST_CONFIG_PATH", "")),
		CaddyFragmentPath:      strings.TrimSpace(getenv("CADDY_FRAGMENT_PATH", "/etc/caddy/fragments/project-manager.caddy")),
		CaddyReloadCommand:     strings.TrimSpace(getenv("CADDY_RELOAD_COMMAND", "sudo -n systemctl reload caddy")),
		CaddyAuthImportName:    strings.TrimSpace(getenv("CADDY_AUTH_IMPORT_NAME", "auth")),
		WebhookBaseURL:         strings.TrimRight(getenv("WEBHOOK_BASE_URL", ""), "/"),
	}
	if cfg.DatabaseURL == "" {
		return cfg, errors.New("DATABASE_URL is required")
	}
	if cfg.DBProvisionAdminURL == "" {
		cfg.DBProvisionAdminURL = cfg.DatabaseURL
	}
	return cfg, nil
}

func userHomeOrDot() string {
	h, err := os.UserHomeDir()
	if err != nil {
		return "."
	}
	return h
}

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

func getenvBool(key string, fallback bool) bool {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	b, err := strconv.ParseBool(v)
	if err != nil {
		return fallback
	}
	return b
}