import { z } from 'zod';

/**
 * Environment schemas live here so api, collab, and tooling validate their
 * configuration the same way. Every service calls `parseEnv` once at startup
 * and crashes with a readable list of problems instead of failing later at
 * first use.
 */
export const apiEnvSchema = z.object({
  NODE_ENV: z.enum(['development', 'test', 'production']).default('development'),
  PORT: z.coerce.number().int().min(1).max(65535).default(3000),
  LOG_LEVEL: z.enum(['fatal', 'error', 'warn', 'info', 'debug', 'trace']).default('info'),
  /** Version shown in health responses; injected at image build time. */
  APP_VERSION: z.string().default('0.0.0-dev'),
  /** PostgreSQL connection string — required, there is no sensible default. */
  DATABASE_URL: z
    .string()
    .min(1)
    .refine((url) => url.startsWith('postgresql://') || url.startsWith('postgres://'), {
      message: 'must be a postgresql:// connection string',
    }),
  /** Set to "false" to skip `prisma migrate deploy` at startup (tests, tooling). */
  MIGRATE_ON_START: z
    .enum(['true', 'false'])
    .default('true')
    .transform((value) => value === 'true'),
});

export type ApiEnv = z.infer<typeof apiEnvSchema>;

export function parseEnv<Schema extends z.ZodTypeAny>(
  schema: Schema,
  env: Record<string, string | undefined>,
): z.infer<Schema> {
  const result = schema.safeParse(env);
  if (!result.success) {
    const problems = result.error.issues
      .map((issue) => `  - ${issue.path.join('.') || '(root)'}: ${issue.message}`)
      .join('\n');
    throw new Error(`Invalid environment configuration:\n${problems}`);
  }
  return result.data;
}