import { readdir, readFile, writeFile } from 'node:fs/promises'
import { dirname, join, resolve } from 'node:path'
import { fileURLToPath } from 'node:url'

const root = resolve(dirname(fileURLToPath(import.meta.url)), '..')
const migrationsDirectory = join(root, 'supabase', 'migrations')
const outputPath = join(root, 'supabase', 'bootstrap.sql')
const migrationNames = (await readdir(migrationsDirectory))
  .filter(name => /^\d+_.+\.sql$/.test(name))
  .sort((left, right) => left.localeCompare(right))

if (migrationNames.length === 0) throw new Error('No Supabase migrations were found.')

const sections = await Promise.all(migrationNames.map(async (name) => {
  const sql = await readFile(join(migrationsDirectory, name), 'utf8')
  return `\n-- ============================================================================\n-- ${name}\n-- ============================================================================\n\n${sql.trim()}\n`
}))

const preflight = `
do $$
begin
  if to_regclass('auth.users') is null then
    raise exception 'D&G bootstrap preflight failed: auth.users is missing';
  end if;
  if not exists (
    select 1
    from information_schema.columns
    where table_schema = 'auth'
      and table_name = 'users'
      and column_name = 'is_anonymous'
  ) then
    raise exception 'D&G bootstrap preflight failed: auth.users.is_anonymous is missing';
  end if;
  if to_regclass('public.profiles') is not null
    or to_regclass('public.ai_jobs') is not null
    or to_regtype('public.member_role') is not null
    or to_regprocedure('public.claim_ai_job(text)') is not null then
    raise exception 'D&G bootstrap preflight failed: a partial/existing D&G schema was found. Do not run the fresh bootstrap over it.';
  end if;
end;
$$;
`

const verification = `
do $$
begin
  if to_regclass('public.profiles') is null then
    raise exception 'D&G bootstrap verification failed: public.profiles is missing';
  end if;
  if to_regclass('public.ai_jobs') is null then
    raise exception 'D&G bootstrap verification failed: public.ai_jobs is missing';
  end if;
  if to_regprocedure('public.claim_ai_job(text)') is null then
    raise exception 'D&G bootstrap verification failed: public.claim_ai_job(text) is missing';
  end if;
  if to_regprocedure('public.stage_two_create_campaign(uuid,uuid,text)') is null then
    raise exception 'D&G bootstrap verification failed: stage-two RPCs are missing';
  end if;
  if to_regprocedure('public.stage_two_retry_failed_round(uuid,uuid)') is null then
    raise exception 'D&G bootstrap verification failed: failed-round recovery RPC is missing';
  end if;
  if to_regprocedure('public.dng_schema_version()') is null then
    raise exception 'D&G bootstrap verification failed: schema version RPC is missing';
  end if;
end;
$$;

notify pgrst, 'reload schema';
commit;

select
  'Dungeons & Ground database is ready' as result,
  to_regclass('public.profiles') as profiles,
  to_regclass('public.ai_jobs') as ai_jobs,
  to_regprocedure('public.claim_ai_job(text)') as worker_rpc;
`

const output = `-- GENERATED FILE. Rebuild with: pnpm db:bundle
-- Paste this entire file into a new Supabase SQL Editor query and click Run.
-- It is intended for a fresh Dungeons & Ground project. The explicit
-- transaction ensures a failure cannot leave a half-created schema.

begin;
${preflight}
${sections.join('')}
${verification}`

await writeFile(outputPath, output)
console.log(`Wrote ${outputPath} from ${migrationNames.length} migrations.`)