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machine.js

const CHART = 'cic';
const HISTORY = 'backToPrevStep';

// states
const LIFE_CHANGE_INTRO = 'lifeChangeIntro';
const MANAGE_COVERAGE_INTRO = 'manageCoverageIntro';
const ADD_MEMBER_REASON = 'addMemberReason';
const REMOVE_MEMBER_REASON = 'removeMemberReason';
const CHANGE_SELECTION = 'changeSelection';
const ADDRESS_ENTRY = 'addressEntry';
const ADDRESS_NO_CHANGE = 'addressNoChange';
const INCOME_ENTRY = 'incomeEntry';
const BASICS_ENTRY = 'basicsEntry';
const INCOME_NO_CHANGE = 'incomeNoChange';
const GOV_HANDOFF = 'govHandoff';
const GOV_PICKUP = 'govPickup';
const STATE_HANDOFF = 'stateHandoff';
const STATE_PICKUP = 'statePickup';
const APP_REVIEW_INTRO = 'appReviewIntro';
 const MEMBER_MARRIAGE = 'memberMarriage';
const DIVORCE_INTRO = 'divorceIntro';
const DEATH_INTRO = 'deathIntro';
const CUSTODY_INTRO = 'custodyIntro';
const COVERAGE_OPTIONS_INTRO = 'coverageOptionsIntro';
const POLICY_CANCEL_PROMPT = 'policyCancelPrompt';
const MOVE_DATE_ENTRY = 'moveDateEntry';
const MEMBER_DIVORCE = 'memberDivorce';
const MEMBER_DEATH = 'memberDeath';
const NEW_PLAN_INTRO = 'newPlanIntro';
const MEMBER_CUSTODY = 'memberCustody';
const MEMBER_JOB_COVERAGE = 'memberJobCoverage';
const MEMBER_COVERAGE_LOSS = 'memberCoverageLoss';
const MEMBER_FUTURE_COVERAGE_LOSS = 'memberFutureCoverageLoss';
const MEMBER_STATUS_CHANGE = 'memberStatusChange';
const SEP_OUTDATED = 'sepOutdated';
const REMOVING_MEMBERS = 'removingMembers';
const SEP_MOVE_OUTDATED = 'sepMoveOutdated';
const SEP_MOVE_OUTDATED_POLICY_VALID = 'sepMoveOutdatedPolicyValid';
const POLICY_INVALID = 'policyInvalid';
const SEP_KEEP_OR_APPLY = 'sepKeepOrApply';
const SEP_MUST_APPLY = 'sepMustApply';
const FINANCIAL_ASSISTANCE = 'financialAssistance';
const MEMBER_CUT = 'memberCut';

// enrollment flow
const ENROLLMENT_FLOW = '/health/household';
const INCOME_FLOW = '/health/member-income-list';
const PLAN_DETAIL = 'planDetail';

// events
const START = 'START';
const APPROVE = 'APPROVE';
const DISMISS = 'DISMISS';
const SUBMIT = 'SUBMIT';
const DONE = 'DONE';
const NEXT = 'NEXT';
const OPEN_URL = 'OPEN_URL';
const CANCEL_POLICY = 'CANCEL_POLICY';
const APPLY = 'APPLY';

// Combine multiple guards while keeping a
// proper key for debugging
const applyAny = (ctx, event, { guard }) => {
  const gList = guard.guards.split('|');
  return gList.some(guardKey => guards[guardKey](ctx, event));
};
const applyEvery = (ctx, event, { guard }) => {
  const gList = guard.guards.split('&');
  return gList.every(guardKey => guards[guardKey](ctx, event));
};

// conditions
const guards = {
  incomeChanged: (ctx, evt) => {
    return evt.change === 'INCOME';
  },
  addressChanged: (ctx, evt) => {
    return evt.change === 'ADDRESS';
  },
  gotPregnant: (ctx, evt) => {
    return evt.change === 'PREGNANCY';
  },
  memberMarried: (ctx, evt) => {
    return evt.change === 'MARRIAGE';
  },
  isBirth: (ctx, evt) => {
    return evt.change === 'BIRTH';
  },
  isAdoption: (ctx, evt) => {
    return evt.change === 'ADOPTION';
  },
  childTurned26: (ctx, evt) => {
    return evt.change === 'CHILD_26';
  },
  isDivorce: (ctx, evt) => {
    return evt.change === 'DIVORCE';
  },
  isDeath: (ctx, evt) => {
    return evt.change === 'DEATH';
  },
  coverageChanged: (ctx, evt) => {
    return evt.change === 'COVERAGE';
  },
  custodyChanged: (ctx, evt) => {
    return evt.change === 'CUSTODY';
  },
  offeredJobCoverage: (ctx, evt) => {
    return evt.change === 'COVERAGE_GAIN_JOB';
  },
  gainedCoverage: (ctx, evt) => {
    return evt.change === 'COVERAGE_GAIN';
  },
  lostCoverage: (ctx, evt) => {
    return evt.change === 'COVERAGE_LOSS';
  },
  willLoseCoverage: (ctx, evt) => {
    return evt.change === 'FUTURE_COVERAGE_LOSS';
  },
  filingStatusChanged: (ctx, evt) => {
    return evt.change === 'FILING_STATUS';
  },
  citizenshipChanged: (ctx, evt) => {
    return evt.change === 'CITIZENSHIP';
  },
  incarcerationChanged: (ctx, evt) => {
    return evt.change === 'INCARCERATION';
  },
  tribeMembershipChanged: (ctx, evt) => {
    return evt.change === 'TRIBE_MEMBERSHIP';
  },
  disabilityChanged: (ctx, evt) => {
    return evt.change === 'DISABILITY';
  },
  legalNameChanged: (ctx, evt) => {
    return evt.change === 'LEGAL_NAME';
  },
  dobChanged: (ctx, evt) => {
    return evt.change === 'DOB';
  },
  ssnChanged: (ctx, evt) => {
    return evt.change === 'SSN';
  },
  isAddMember: (ctx, evt) => {
    return evt.change === 'ADD_MEMBER';
  },
  isRemoveMember: (ctx, evt) => {
    return evt.change === 'REMOVE_MEMBER';
  },
  isCancelPolicy: (ctx, evt) => {
    return evt.change === 'CANCEL_POLICY';
  },
  isOther: (ctx, evt) => {
    return evt.change === 'OTHER';
  },
  'isBirth|isAdoption|disabilityChanged': applyAny,
  'childTurned26|isDivorce|isDeath|custodyChanged': applyAny,
  'filingStatusChanged|citizenshipChanged|incarcerationChanged|tribeMembershipChanged': applyAny,
  'legalNameChanged|ssnChanged|dobChanged': applyAny,
  'citizenshipChanged|incarcerationChanged': applyAny,
  'childTurned26|isOther': applyAny,
  'gainedCoverage|disabilityChanged': applyAny,
  'filingStatusChanged|incarcerationChanged': applyAny,
  // household basics conditions WIP
  updatedTaxHousehold: (ctx, evt) => {
    return evt.dirty;
  },
  prelimEligUnchanged: (ctx, evt) => {
    // TODO compare all results with current app
    return false;
  },
  // Location change
  'movedToFedMarketplace|movedCurrentPolicyValid|movedCurrentPolicyInvalid': applyAny,
  movedToStateMarketplace: (ctx, evt) => {
    return false;
  },
  movedParamsUnchanged: (ctx, evt) => {
    // TODO: backend feat
    return false;
  },
  isWithin60Days: (ctx, evt) => {
    return true;
  },
  isWithinNext60Days: (ctx, evt) => {
    return true;
  },
  isPolicyValid: (ctx, evt) => {
    return evt.policyValid;
  },
  'isWithin60Days&isPolicyValid': applyEvery,
  'isWithin60Days&isPolicyInvalid': applyEvery,
  isPolicyInvalid: (ctx, evt) => {
    return !evt.policyValid;
  },
  isFiler: (ctx, evt) => {
    return evt.relation === 'SELF';
  },
  isSpouse: (ctx, evt) => {
    return evt.relation === 'SPOUSE';
  },
  isMultiMembers: (ctx, evt) => {
    return evt.members?.length > 1;
  },
  isFilerOrSpouse: (ctx, evt) => {
    return evt.relation === 'SELF' || evt.relation === 'SPOUSE';
  },
  isOtherRelative: (ctx, evt) => {
    return evt.relation !== 'SELF' && evt.relation !== 'SPOUSE';
  },
  gotDMI: (ctx, evt) => {
    return evt.dmis && evt.dmis.length > 0;
  },
  shouldKeepMember: (ctx, evt) => {
    return evt.relation !== 'SELF' && !evt.removeMember;
  },
  'isFiler&isMultiMembers': applyEvery,
  'isFilerOrSpouse|shouldKeepMember': applyAny,
};

const combine = type => ({
  type,
  guards: type,
});

const chart = Machine({
  id: CHART,
  initial: LIFE_CHANGE_INTRO,
  context: {},
  states: {
    [LIFE_CHANGE_INTRO]: {
      on: {
        [START]: CHANGE_SELECTION,
      },
    },
    [MANAGE_COVERAGE_INTRO]: {
      on: {
        [SUBMIT]: [
          { target: ADD_MEMBER_REASON, cond: 'isAddMember' },
          { target: REMOVE_MEMBER_REASON, cond: 'isRemoveMember' },
          { target: POLICY_CANCEL_PROMPT, cond: 'isCancelPolicy' },
          { target: ENROLLMENT_FLOW },
        ],
      },
    },
    [CHANGE_SELECTION]: {
      on: {
        [SUBMIT]: [
          {
            target: BASICS_ENTRY,
            cond: 'incomeChanged',
          },
          {
            target: APP_REVIEW_INTRO,
            cond: combine('isBirth|isAdoption|disabilityChanged'),
          },
          { target: ADDRESS_ENTRY, cond: 'addressChanged' },
          { target: MEMBER_MARRIAGE, cond: 'memberMarried' },
          { target: GOV_HANDOFF, cond: 'gotPregnant' },
          {
            target: DIVORCE_INTRO,
            cond: 'isDivorce',
          },
          { target: DEATH_INTRO, cond: 'isDeath' },
          { target: CUSTODY_INTRO, cond: 'custodyChanged' },
          { target: COVERAGE_OPTIONS_INTRO, cond: 'coverageChanged' },
          {
            target: MEMBER_STATUS_CHANGE,
            cond: combine(
              'filingStatusChanged|citizenshipChanged|incarcerationChanged|tribeMembershipChanged',
            ),
          },
        ],
      },
    },
    [BASICS_ENTRY]: {
      on: {
        [SUBMIT]: [
          { target: APP_REVIEW_INTRO, cond: 'updatedTaxHousehold' },
          { target: INCOME_ENTRY },
        ],
      },
    },
    [INCOME_ENTRY]: {
      on: {
        [SUBMIT]: [
          { target: INCOME_NO_CHANGE, cond: 'prelimEligUnchanged' },
          {
            target: FINANCIAL_ASSISTANCE,
          },
        ],
        [APPLY]: ENROLLMENT_FLOW,
      },
    },
    [INCOME_NO_CHANGE]: {
      on: {
        [DONE]: PLAN_DETAIL,
        [APPLY]: ENROLLMENT_FLOW,
      },
    },
    [APP_REVIEW_INTRO]: {
      on: {
        [NEXT]: ENROLLMENT_FLOW,
        [DISMISS]: PLAN_DETAIL,
      },
    },
    [DIVORCE_INTRO]: {
      on: {
        [NEXT]: MEMBER_DIVORCE,
      },
    },
    [MEMBER_DIVORCE]: {
      on: {
        [SUBMIT]: [
          { target: GOV_HANDOFF, cond: 'isOtherRelative' },
          { target: REMOVING_MEMBERS, cond: 'isSpouse' },
          { target: APP_REVIEW_INTRO },
        ],
      },
    },
    [DEATH_INTRO]: {
      on: {
        [NEXT]: MEMBER_DEATH,
      },
    },
    [MEMBER_DEATH]: {
      on: {
        [SUBMIT]: [
          { target: NEW_PLAN_INTRO, cond: combine('isFiler&isMultiMembers') },
          { target: POLICY_CANCEL_PROMPT, cond: 'isFiler' },
          { target: REMOVING_MEMBERS },
        ],
      },
    },
    [CUSTODY_INTRO]: {
      on: {
        [NEXT]: MEMBER_CUSTODY,
      },
    },
    [MEMBER_CUSTODY]: {
      on: {
        [SUBMIT]: [
          { target: GOV_HANDOFF, cond: 'shouldKeepMember' },
          { target: REMOVING_MEMBERS },
        ],
      },
    },
    [COVERAGE_OPTIONS_INTRO]: {
      on: {
        [SUBMIT]: [
          { target: MEMBER_JOB_COVERAGE, cond: 'offeredJobCoverage' },
          { target: APP_REVIEW_INTRO, cond: 'gainedCoverage' },
          { target: MEMBER_COVERAGE_LOSS, cond: 'lostCoverage' },
          { target: MEMBER_FUTURE_COVERAGE_LOSS, cond: 'willLoseCoverage' },
        ],
      },
    },
    [ADDRESS_ENTRY]: {
      on: {
        [SUBMIT]: [
          { target: ADDRESS_NO_CHANGE, cond: 'movedParamsUnchanged' },
          { target: STATE_HANDOFF, cond: 'movedToStateMarketplace' },
          {
            target: MOVE_DATE_ENTRY,
          },
        ],
      },
    },
    [MOVE_DATE_ENTRY]: {
      on: {
        [SUBMIT]: [
          {
            target: SEP_KEEP_OR_APPLY,
            cond: combine('isWithin60Days&isPolicyValid'),
          },
          {
            target: SEP_MUST_APPLY,
            cond: combine('isWithin60Days&isPolicyInvalid'),
          },
          {
            target: SEP_MOVE_OUTDATED_POLICY_VALID,
            cond: 'isPolicyValid',
          },
          {
            target: SEP_MOVE_OUTDATED,
          },
        ],
      },
    },
    [STATE_HANDOFF]: {
      on: {
        [OPEN_URL]: STATE_PICKUP,
      },
    },
    [STATE_PICKUP]: {
      on: {
        [DONE]: PLAN_DETAIL,
        [CANCEL_POLICY]: POLICY_CANCEL_PROMPT,
      },
    },
    [POLICY_CANCEL_PROMPT]: {
      on: {
        [DISMISS]: HISTORY,
      },
    },
    [ADDRESS_NO_CHANGE]: {
      on: {
        [DONE]: PLAN_DETAIL,
      },
    },
    [SEP_MOVE_OUTDATED]: {
      on: {
        [NEXT]: POLICY_INVALID,
        [APPLY]: ENROLLMENT_FLOW,
      },
    },
    [SEP_OUTDATED]: {
      on: {},
    },
    [POLICY_INVALID]: {
      on: {
        [CANCEL_POLICY]: POLICY_CANCEL_PROMPT,
        [DISMISS]: PLAN_DETAIL,
      },
    },
    [SEP_KEEP_OR_APPLY]: {
      on: {
        [APPLY]: ENROLLMENT_FLOW,
        [DISMISS]: PLAN_DETAIL,
      },
    },
    [SEP_MUST_APPLY]: {
      on: {
        [DISMISS]: PLAN_DETAIL,
        [APPLY]: ENROLLMENT_FLOW,
      },
    },
    [SEP_MOVE_OUTDATED_POLICY_VALID]: {
      on: {
        [DONE]: PLAN_DETAIL,
        [APPLY]: ENROLLMENT_FLOW,
      },
    },
    [GOV_HANDOFF]: {
      on: {
        [OPEN_URL]: GOV_PICKUP,
      },
    },
    [GOV_PICKUP]: {
      on: {
        [DONE]: PLAN_DETAIL,
      },
    },
    [MEMBER_MARRIAGE]: {
      on: {
        [SUBMIT]: [
          { target: GOV_HANDOFF, cond: 'shouldKeepMember' },
          { target: APP_REVIEW_INTRO, cond: 'isFiler' },
          { target: REMOVING_MEMBERS },
        ],
      },
    },
    [MEMBER_JOB_COVERAGE]: {
      on: {
        [SUBMIT]: [
          {
            target: GOV_HANDOFF,
            cond: combine('isFilerOrSpouse|shouldKeepMember'),
          },
          { target: REMOVING_MEMBERS },
        ],
      },
    },
    [MEMBER_COVERAGE_LOSS]: {
      on: {
        [SUBMIT]: [
          { target: APP_REVIEW_INTRO, cond: 'isWithin60Days' },
          { target: SEP_OUTDATED },
        ],
      },
    },
    [MEMBER_FUTURE_COVERAGE_LOSS]: {
      on: {
        [SUBMIT]: [
          { target: APP_REVIEW_INTRO, cond: 'isWithinNext60Days' },
          { target: SEP_OUTDATED },
        ],
      },
    },
    [MEMBER_STATUS_CHANGE]: {
      on: {
        [SUBMIT]: [
          { target: APP_REVIEW_INTRO, cond: 'isWithin60Days' },
          { target: GOV_HANDOFF, cond: 'isNotPhase1' },
          { target: SEP_OUTDATED },
        ],
      },
    },
    [REMOVING_MEMBERS]: {
      on: {
        [DONE]: APP_REVIEW_INTRO,
      },
    },
    [FINANCIAL_ASSISTANCE]: {
      on: {
        [NEXT]: INCOME_FLOW,
      },
    },
    [NEW_PLAN_INTRO]: {
      on: {
        [NEXT]: ENROLLMENT_FLOW,
      },
    },
    [ADD_MEMBER_REASON]: {
      on: {
        [SUBMIT]: [
          {
            target: APP_REVIEW_INTRO,
            cond: combine('isBirth|isAdoption|disabilityChanged'),
          },
          {
            target: MEMBER_STATUS_CHANGE,
            cond: combine('citizenshipChanged|incarcerationChanged'),
          },
          { target: MEMBER_COVERAGE_LOSS, cond: 'lostCoverage' },
          { target: MEMBER_MARRIAGE, cond: 'memberMarried' },
        ],
      },
    },
    [REMOVE_MEMBER_REASON]: {
      on: {
        [SUBMIT]: [
          { target: MEMBER_CUT, cond: combine('childTurned26|isOther') },
          { target: MEMBER_JOB_COVERAGE, cond: 'offeredJobCoverage' },
          {
            target: APP_REVIEW_INTRO,
            cond: combine('gainedCoverage|disabilityChanged'),
          },
          {
            target: DIVORCE_INTRO,
            cond: 'isDivorce',
          },
          { target: DEATH_INTRO, cond: 'isDeath' },
          { target: CUSTODY_INTRO, cond: 'custodyChanged' },
          {
            target: MEMBER_STATUS_CHANGE,
            cond: combine('filingStatusChanged|incarcerationChanged'),
          },
        ],
      },
    },
    [MEMBER_CUT]: {
      on: {
        [SUBMIT]: [
          { target: GOV_HANDOFF, cond: 'shouldKeepMember' },
          { target: REMOVING_MEMBERS },
        ],
      },
    },
    [INCOME_FLOW]: {
      type: 'redirect',
    },
    [ENROLLMENT_FLOW]: {
      type: 'redirect',
    },
    [PLAN_DETAIL]: {
      type: 'exit',
    },
    [HISTORY]: {
      type: 'history',
    },
  },
},
  {
  guards,
})