import { z } from "zod";

const booleanStringSchema = z
  .string()
  .trim()
  .transform((value) => value.toLowerCase())
  .pipe(z.enum(["true", "false", "1", "0", "yes", "no"]))
  .transform((value) => ["true", "1", "yes"].includes(value));

const serverConfigSchema = z.object({
  DATABASE_URL: z.string().url(),
  AUTH_SECRET: z.string().min(1),
  AUTH_GOOGLE_ID: z.string().min(1),
  AUTH_GOOGLE_SECRET: z.string().min(1),
  ADMIN_EMAILS: z
    .string()
    .min(1)
    .transform((value) =>
      value
        .split(",")
        .map((email) => email.trim().toLowerCase())
        .filter(Boolean),
    ),
  APP_URL: z.string().url(),
  RSVP_DEADLINE: z.iso.date(),
  S3_ENDPOINT: z.string().url(),
  S3_REGION: z.string().min(1),
  S3_BUCKET: z.string().min(1),
  S3_ACCESS_KEY_ID: z.string().min(1),
  S3_SECRET_ACCESS_KEY: z.string().min(1),
  S3_FORCE_PATH_STYLE: booleanStringSchema.default(true),
});

export type ServerConfig = z.infer<typeof serverConfigSchema>;

const buildTimeConfigDefaults = {
  DATABASE_URL: "postgres://wedding:wedding@wedding-db:5432/wedding",
  AUTH_SECRET: "docker-build-placeholder",
  AUTH_GOOGLE_ID: "docker-build-placeholder",
  AUTH_GOOGLE_SECRET: "docker-build-placeholder",
  ADMIN_EMAILS: "admin@example.com",
  APP_URL: "https://wedding.example.com",
  RSVP_DEADLINE: "2099-12-31",
  S3_ENDPOINT: "http://wedding-minio:9000",
  S3_REGION: "us-east-1",
  S3_BUCKET: "wedding-uploads",
  S3_ACCESS_KEY_ID: "minioadmin",
  S3_SECRET_ACCESS_KEY: "minioadmin",
  S3_FORCE_PATH_STYLE: "true",
};

export function getServerConfig(env: NodeJS.ProcessEnv = process.env) {
  if (env.SKIP_ENV_VALIDATION === "1") {
    return serverConfigSchema.parse({ ...buildTimeConfigDefaults, ...env });
  }

  return serverConfigSchema.parse(env);
}

export function getDatabaseUrl(env: NodeJS.ProcessEnv = process.env) {
  if (env.SKIP_ENV_VALIDATION === "1") {
    return buildTimeConfigDefaults.DATABASE_URL;
  }

  return z.string().url().parse(env.DATABASE_URL);
}