import test from 'node:test'
import assert from 'node:assert/strict'
import { readFileSync } from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const schemaPath = path.resolve(__dirname, '../../../docs/schemas/mbr-layout.schema.json')

const HEX_64_RE = /^[0-9a-f]{64}$/

function isValidExamplePayload(p) {
  if (!p || typeof p !== 'object' || Array.isArray(p)) return false
  if (p.role !== 'seeder') return false
  if (p.protocol !== 'bare-os-v1') return false
  if (!(Number.isInteger(p.keyCount) && p.keyCount >= 0 && p.keyCount <= 32)) return false
  if (!(Number.isInteger(p.activeIndex) && p.activeIndex >= 0 && p.activeIndex <= 31)) return false
  if (!(Number.isInteger(p.atMs) && p.atMs >= 0)) return false
  const primaryOk = p.primaryHex === null || (typeof p.primaryHex === 'string' && HEX_64_RE.test(p.primaryHex))
  if (!primaryOk) return false
  if (!Array.isArray(p.failoverHexes) || p.failoverHexes.some((v) => typeof v !== 'string' || !HEX_64_RE.test(v))) {
    return false
  }
  if (p.failoverHexes.length > 31) return false
  if (p.primaryHex === null && p.keyCount !== 0) return false
  if (p.primaryHex !== null && p.keyCount < 1) return false
  if ('keyLabels' in p) {
    if (!Array.isArray(p.keyLabels) || p.keyLabels.some((v) => typeof v !== 'string' || !v || v.length > 64)) {
      return false
    }
  }
  if ('regionLabels' in p) {
    if (
      !Array.isArray(p.regionLabels) ||
      p.regionLabels.some((v) => typeof v !== 'string' || !v || v.length > 64)
    ) {
      return false
    }
  }
  return true
}

test('mbr-layout schema includes valid seeder examples', () => {
  const schema = JSON.parse(readFileSync(schemaPath, 'utf8'))
  assert.equal(schema.$schema, 'https://json-schema.org/draft/2020-12/schema')
  assert.equal(schema.type, 'object')
  assert.ok(Array.isArray(schema.examples) && schema.examples.length >= 1)
  for (const ex of schema.examples) {
    assert.equal(isValidExamplePayload(ex), true)
  }
})