import { describe, it, expect } from 'vitest'

import {
  ideaStatusToApi,
  ideaStatusFromApi,
  canTransition,
  isIdeaEditable,
  isGrillMdEditable,
  isPlanMdEditable,
  IDEA_STATUS_API_VALUES,
} from '@/lib/idea-status'

describe('idea-status mappers', () => {
  it('round-trips every API value', () => {
    for (const api of IDEA_STATUS_API_VALUES) {
      const db = ideaStatusFromApi(api)
      expect(db).not.toBeNull()
      expect(ideaStatusToApi(db!)).toBe(api)
    }
  })

  it('returns null for invalid input', () => {
    expect(ideaStatusFromApi('NOT_A_STATUS')).toBeNull()
  })

  it('is case-insensitive on the API side', () => {
    expect(ideaStatusFromApi('PLAN_READY')).toBe('PLAN_READY')
    expect(ideaStatusFromApi('Plan_Ready')).toBe('PLAN_READY')
  })
})

describe('canTransition', () => {
  it('allows valid forward transitions', () => {
    expect(canTransition('DRAFT', 'GRILLING')).toBe(true)
    expect(canTransition('GRILLING', 'GRILLED')).toBe(true)
    expect(canTransition('GRILLED', 'PLANNING')).toBe(true)
    expect(canTransition('PLANNING', 'PLAN_READY')).toBe(true)
    expect(canTransition('PLAN_READY', 'PLANNED')).toBe(true)
  })

  it('allows re-grill from GRILLED and PLAN_READY-ish states', () => {
    expect(canTransition('GRILLED', 'GRILLING')).toBe(true)
    expect(canTransition('PLAN_FAILED', 'PLANNING')).toBe(true)
  })

  it('allows fail-side transitions', () => {
    expect(canTransition('GRILLING', 'GRILL_FAILED')).toBe(true)
    expect(canTransition('PLANNING', 'PLAN_FAILED')).toBe(true)
  })

  it('allows recovery from failed states', () => {
    expect(canTransition('GRILL_FAILED', 'GRILLING')).toBe(true)
    expect(canTransition('PLAN_FAILED', 'GRILLED')).toBe(true)
  })

  it('only allows PLANNED → PLAN_READY (relink path)', () => {
    expect(canTransition('PLANNED', 'PLAN_READY')).toBe(true)
    expect(canTransition('PLANNED', 'GRILLING')).toBe(false)
    expect(canTransition('PLANNED', 'DRAFT')).toBe(false)
  })

  it('rejects invalid jumps', () => {
    expect(canTransition('DRAFT', 'PLANNED')).toBe(false)
    expect(canTransition('DRAFT', 'PLAN_READY')).toBe(false)
    expect(canTransition('GRILLING', 'PLANNED')).toBe(false)
  })
})

describe('isIdeaEditable', () => {
  it('allows edit in non-running, non-PLANNED states', () => {
    expect(isIdeaEditable('DRAFT')).toBe(true)
    expect(isIdeaEditable('GRILLED')).toBe(true)
    expect(isIdeaEditable('GRILL_FAILED')).toBe(true)
    expect(isIdeaEditable('PLAN_FAILED')).toBe(true)
    expect(isIdeaEditable('PLAN_READY')).toBe(true)
  })

  it('blocks edit while a job is running or after PLANNED', () => {
    expect(isIdeaEditable('GRILLING')).toBe(false)
    expect(isIdeaEditable('PLANNING')).toBe(false)
    expect(isIdeaEditable('PLANNED')).toBe(false)
  })
})

describe('isGrillMdEditable / isPlanMdEditable', () => {
  it('grill_md only editable in GRILLED or PLAN_READY', () => {
    expect(isGrillMdEditable('GRILLED')).toBe(true)
    expect(isGrillMdEditable('PLAN_READY')).toBe(true)
    expect(isGrillMdEditable('DRAFT')).toBe(false)
    expect(isGrillMdEditable('PLANNED')).toBe(false)
  })

  it('plan_md only editable in PLAN_READY', () => {
    expect(isPlanMdEditable('PLAN_READY')).toBe(true)
    expect(isPlanMdEditable('GRILLED')).toBe(false)
    expect(isPlanMdEditable('PLAN_FAILED')).toBe(false)
    expect(isPlanMdEditable('PLANNED')).toBe(false)
  })
})