import { z } from "zod";

/**
 * Zod schema for all environment variables used across the project.
 *
 * Every `process.env.X` access should be replaced by importing `env` from
 * this package and using the typed, validated value.
 *
 * To add a new env var:
 * 1. Add it to this schema with the correct type, default, and validation.
 * 2. The typed `env` object is auto-generated from the schema's output.
 */

export const envSchema = z.object({
  // ── Database ──
  DATABASE_URL: z.string().min(1, "DATABASE_URL is required"),

  // ── Node / Runtime ──
  NODE_ENV: z
    .enum(["development", "production", "test"])
    .default("development"),

  // ── Logging (logger package) ──
  LOG_MAX_SIZE: z.coerce.number().int().positive().default(10 * 1024 * 1024), // 10 MB
  LOG_MAX_BACKUPS: z.coerce.number().int().nonnegative().default(5),

  // ── Static file serving ──
  STATIC_DIR: z.string().default("static"),
  UPLOAD_SUBDIR: z.string().default("upload"),

  // ── Scheduler ──
  SCHEDULER_MAX_CONCURRENCY: z.coerce.number().int().positive().default(5),
  SCHEDULER_LOG_RETENTION_DAYS: z.coerce.number().int().positive().default(30),

  // ── App ──
  APP_URL: z.string().min(1, "APP_URL is required"),
  NITRO_PORT: z.coerce.number().int().positive(),

  // ── OAuth: GitHub ──
  GITHUB_CLIENT_ID: z.string().default(""),
  GITHUB_CLIENT_SECRET: z.string().default(""),

  // ── OAuth: Gitea ──
  GITEA_CLIENT_ID: z.string().default(""),
  GITEA_CLIENT_SECRET: z.string().default(""),
  GITEA_URL: z.string().default(""),

  // ── Bootstrap (seed) ──
  BOOTSTRAP_ADMIN_USERNAME: z.string().optional(),
  BOOTSTRAP_ADMIN_PASSWORD: z.string().optional(),
});

/** Inferred type of the parsed env object. */
export type Env = z.infer<typeof envSchema>;