import { describe, expect, test } from 'bun:test'
import { join } from 'node:path'
import type { AnimaConfig } from './config'

/**
 * BACKWARD-COMPAT FREEZE TEST for `anima.config.ts`.
 *
 * Imports a FROZEN minimal config a real user could have written at an older
 * release (v0.5.0-era: only `network` set, every other field absent) and
 * asserts the CURRENT `defineConfig` resolves it to a fully-defaulted
 * AnimaConfig. This is the same decode `findAndLoadConfig` performs internally
 * (`(await import(path)).default`). If a future change makes a then-optional
 * field REQUIRED, or drops a default, importing the frozen fixture fails ->
 * CI red, instead of bricking the first user who upgrades with an old config.
 *
 * The fixture lives at test/fixtures/compat/anima-config-v0.5.0.fixture.ts and
 * is immutable. A newer config shape adds a NEW fixture file. (It is named
 * `*.fixture.ts` rather than `anima.config.ts` because `.gitignore` ignores the
 * literal `anima.config.ts`; the bytes are otherwise identical.)
 */
const FIXTURE = join(
  import.meta.dir,
  '../../../test/fixtures/compat/anima-config-v0.5.0.fixture.ts',
)

describe('config backward-compat (frozen fixture)', () => {
  test('FROZEN v0.5.0-era minimal config resolves all required fields with defaults', async () => {
    const mod = (await import(FIXTURE)) as { default: AnimaConfig }
    const config = mod.default
    expect(config).toBeDefined()

    // The one field the user actually wrote.
    expect(config.network).toBe('0g-mainnet')

    // Every required field must coalesce to a default (the upgrade contract).
    expect(config.storage).toEqual({ network: '0g-mainnet' })
    expect(config.identity).toEqual({ iNFT: null, operator: null, agent: null })
    expect(config.brain).toEqual({ provider: null, model: null })
    expect(config.plugins).toEqual(['onchain', 'comms', 'system'])
    expect(config.tools).toEqual({})
    expect(config.imports).toEqual({ claudeCode: true })
  })

  test('FROZEN config: optional fields absent in the source still coalesce to defaults', async () => {
    const mod = (await import(FIXTURE)) as { default: AnimaConfig }
    const config = mod.default
    // None of these were in the fixture source; defineConfig must fill them.
    expect(config.operator).toBeNull()
    expect(config.subname).toBeNull()
    expect(config.approvals).toEqual({ mode: 'prompt', allowlist: [] })
    expect(config.skills).toEqual({ disabled: [] })
    expect(config.prompt).toEqual({ append: null })
    expect(config.deployTarget).toBe('local')
    expect(config.sandbox).toEqual({ mode: 'none' })
  })
})