import { z } from "zod";
import { FALLBACK_HOTEL_NAME } from "@/lib/brand";

// Minimal validated env for the foundation. When the Next.js app is added this
// will move to @t3-oss/env-nextjs (the habbo-next pattern), but the data layer
// only needs the DB connection + a couple of values today.
const schema = z.object({
	NODE_ENV: z
		.enum(["development", "test", "production"])
		.default("development"),
	DATABASE_URL: z.string().url(),
	DATABASE_POOL_SIZE: z.coerce.number().int().positive().default(10),
	DATABASE_IDLE_TIMEOUT_MS: z.coerce.number().int().positive().default(300_000),
	DATABASE_CONNECT_TIMEOUT_MS: z.coerce
		.number()
		.int()
		.positive()
		.default(10_000),
	HOTEL_NAME: z.string().default(FALLBACK_HOTEL_NAME),
	APP_URL: z.string().url().default("http://localhost:3000"),
	// Resend API key (preferred — simpler HTTP API, always works).
	RESEND_API_KEY: z.string().optional(),
	// SMTP (password reset / notifications). Email features no-op if unset.
	SMTP_HOST: z.string().optional(),
	SMTP_PORT: z.coerce.number().int().positive().optional(),
	SMTP_SECURE: z
		.string()
		.optional()
		.transform((v) => v === "true" || v === "1"),
	SMTP_USER: z.string().optional(),
	SMTP_PASSWORD: z.string().optional(),
	SMTP_FROM: z.string().optional(),
	// RCON link to the Arcturus emulator (raw-JSON TCP protocol).
	RCON_HOST: z.string().default("127.0.0.1"),
	RCON_PORT: z.coerce.number().int().positive().default(3001),
	RCON_TIMEOUT_MS: z.coerce.number().int().positive().default(10_000),
	RCON_MAX_RETRIES: z.coerce.number().int().positive().default(3),
	// NextAuth v5 reads AUTH_SECRET itself; declared here for documentation/typing.
	AUTH_SECRET: z.string().min(1).optional(),
	// Laravel APP_KEY (base64:...) — needed to read existing 2FA secrets.
	APP_KEY: z.string().optional(),
	// Optional OAuth providers (enabled only when both id+secret are set).
	DISCORD_CLIENT_ID: z.string().optional(),
	DISCORD_CLIENT_SECRET: z.string().optional(),
	GOOGLE_CLIENT_ID: z.string().optional(),
	GOOGLE_CLIENT_SECRET: z.string().optional(),
	// Mirrors Laravel config('habbo.site.convert_passwords') — enables md5->argon2id.
	CONVERT_PASSWORDS: z
		.string()
		.optional()
		.transform((v) => v === "true" || v === "1"),
	// Hashing driver for NEW passwords: bcrypt (default, fits varchar(64)) | argon2id.
	PASSWORD_HASH: z.enum(["bcrypt", "argon2id"]).optional(),
	// Filesystem dir the badge uploader writes <code>.gif into (the emulator's
	// badge image folder, e.g. .../assets/c_images/album1584). Upload is disabled
	// when unset.
	BADGE_UPLOAD_DIR: z.string().optional(),
	// Emulator JAR backup job (jobs-worker, host-side); no-op unless both set.
	EMULATOR_JAR_PATH: z.string().optional(),
	EMULATOR_BACKUP_DIR: z.string().optional(),
	EMULATOR_BACKUP_KEEP: z.coerce.number().int().positive().optional(),
	// Optional AI content moderation (comments / guestbook).
	OPENAI_API_KEY: z.string().optional(),
	// Optional alerting (jobs worker / alert service).
	DISCORD_WEBHOOK_URL: z.string().url().optional(),
	TELEGRAM_BOT_TOKEN: z.string().optional(),
	TELEGRAM_CHAT_ID: z.string().optional(),
	ALERT_EMAIL: z.string().optional(),
	// Optional PayPal top-up.
	PAYPAL_CLIENT_ID: z.string().optional(),
	PAYPAL_SECRET: z.string().optional(),
	PAYPAL_API: z.string().url().optional(),
	// Redis — strongly recommended in production (required for multi-instance).
	// Without it, rate limits / shared caches are in-process only.
	REDIS_URL: z.string().optional(),
	// Logging level.
	LOG_LEVEL: z.enum(["debug", "info", "warn", "error"]).optional(),
	// Optional Sentry — no-op when unset.
	SENTRY_DSN: z.string().url().optional(),
	NEXT_PUBLIC_SENTRY_DSN: z.string().url().optional(),
	SENTRY_ORG: z.string().optional(),
	SENTRY_PROJECT: z.string().optional(),
	SENTRY_AUTH_TOKEN: z.string().optional(),
	APP_VERSION: z.string().optional(),
	NEXT_PUBLIC_APP_VERSION: z.string().optional(),
}).superRefine((data, ctx) => {
	if (data.NODE_ENV !== "production") return;
	if (!data.AUTH_SECRET || data.AUTH_SECRET.length < 32) {
		ctx.addIssue({
			code: "custom",
			message:
				"AUTH_SECRET (>=32 characters) is required when NODE_ENV=production",
			path: ["AUTH_SECRET"],
		});
	}
});

type Env = z.infer<typeof schema>;

// SKIP_ENV_VALIDATION is for tooling only (vitest). Production deploy must NOT
// set this — builds should validate AUTH_SECRET, DATABASE_URL, etc.
export const env: Env = process.env.SKIP_ENV_VALIDATION
	? (process.env as unknown as Env)
	: schema.parse(process.env);