/**
 * Shared test fixtures — the planning engine (`POST /api/plan/propose`,
 * `POST /api/plan/apply`) and its nested shapes.
 */

import type {
  CostBreakdown,
  DayCollision,
  PlanAge4Projection,
  PlanApplyResponse,
  PlanChange,
  PlanProposal,
  PlanSyncResponse,
  PlanSyncWithWishResponse,
  PlanWarning,
  PoolBalance,
  ProposedDay,
  Rejection,
  ShortfallRemedy,
  SurplusAdvice,
  VacationBalance,
  WindowOutcome,
} from '@/types'
import { makeLeaveWish } from './mockData'

export function makeCostBreakdown(overrides: Partial<CostBreakdown> = {}): CostBreakdown {
  return { free: 0, vacation: 0, sjukpenning: 0, lagsta: 0, ...overrides }
}

export function makeShortfallRemedy(overrides: Partial<ShortfallRemedy> = {}): ShortfallRemedy {
  return {
    kind: 'dubbeldag',
    messageKey: 'planRemedies.example',
    data: {},
    daysFreed: 0,
    ...overrides,
  }
}

export function makeProposedDay(overrides: Partial<ProposedDay> = {}): ProposedDay {
  return {
    date: '2026-06-15',
    parentPersonalDataUuid: 'pd-a',
    childId: 'child-1',
    dayType: 'sjukpenning',
    isDubbeldag: false,
    wishId: 'lw-1',
    reason: 'Sommar',
    ...overrides,
  }
}

export function makeWindowOutcome(overrides: Partial<WindowOutcome> = {}): WindowOutcome {
  return {
    wishId: 'lw-1',
    wishName: 'Sommar',
    wishNameMessageKey: null,
    year: 2026,
    startDate: '2026-06-15',
    endDate: '2026-07-26',
    weeksWished: 6,
    weeksFunded: 6,
    shortfallDays: 0,
    strategy: 'parent_swap',
    messageKey: 'planOutcomes.windowExplanation',
    data: {},
    costBreakdown: makeCostBreakdown({ free: 12, vacation: 19, sjukpenning: 11 }),
    remedies: [],
    shiftGainDays: 0,
    seriesId: null,
    ...overrides,
  }
}

export function makePlanWarning(overrides: Partial<PlanWarning> = {}): PlanWarning {
  return {
    kind: 'days_lost_at_age_4',
    messageKey: 'planWarnings.days_lost_at_age_4',
    data: {},
    ...overrides,
  }
}

export function makePoolBalance(overrides: Partial<PoolBalance> = {}): PoolBalance {
  return {
    parentPersonalDataUuid: 'pd-a',
    childId: 'child-1',
    sjukpenningLeft: 310,
    lagstaLeft: 90,
    dubbeldagarLeft: 55,
    ...overrides,
  }
}

export function makeVacationBalance(overrides: Partial<VacationBalance> = {}): VacationBalance {
  return {
    parentPersonalDataUuid: 'pd-a',
    year: 2026,
    totalDays: 25,
    savedDaysIn: 0,
    alreadyUsed: 0,
    isAssumed: false,
    ...overrides,
  }
}

export function makeSurplusAdvice(overrides: Partial<SurplusAdvice> = {}): SurplusAdvice {
  return {
    kind: 'wish_more_leave',
    messageKey: 'planSurplus.wish_more_leave',
    daysInvolved: 0,
    data: {},
    ...overrides,
  }
}

export function makePlanAge4Projection(overrides: Partial<PlanAge4Projection> = {}): PlanAge4Projection {
  return {
    parentPersonalDataUuid: 'pd-a',
    childId: 'child-1',
    fourthBirthday: '2029-06-01',
    projectedLeftAtB4: 0,
    savableAfterB4: 96,
    expiringAtB4: 0,
    ...overrides,
  }
}

export function makePlanProposal(overrides: Partial<PlanProposal> = {}): PlanProposal {
  return {
    days: [makeProposedDay()],
    outcomes: [makeWindowOutcome()],
    warnings: [],
    poolBalances: [],
    vacationBalances: [],
    surplusAdvice: [],
    age4Projections: [],
    ...overrides,
  }
}

export function makeDayCollision(overrides: Partial<DayCollision> = {}): DayCollision {
  return {
    date: '2026-06-15',
    parentPersonalDataUuid: 'pd-a',
    childId: 'child-1',
    existingDayType: 'vacation',
    proposedDayType: 'sjukpenning',
    ...overrides,
  }
}

export function makeRejection(overrides: Partial<Rejection> = {}): Rejection {
  return {
    messageKey: 'planApply.rejection.insufficientBalance',
    data: {},
    ...overrides,
  }
}

export function makePlanApplyResponse(overrides: Partial<PlanApplyResponse> = {}): PlanApplyResponse {
  return {
    accepted: true,
    createdCount: 0,
    skippedIdenticalCount: 0,
    skippedFreeCount: 0,
    replacedCount: 0,
    collisions: [],
    rejections: [],
    createdDays: [],
    ...overrides,
  }
}

/** `POST /api/plan/sync` — one (child, parent, date) slot's delta. See
 * `PlanChange`'s docstring (src/types/entities.ts) for the `kind` vocabulary. */
export function makePlanChange(overrides: Partial<PlanChange> = {}): PlanChange {
  return {
    kind: 'added',
    date: '2028-06-20',
    parentPersonalDataUuid: 'pd-a',
    childId: 'child-1',
    oldDayType: null,
    newDayType: 'vacation',
    oldIsDubbeldag: null,
    newIsDubbeldag: false,
    oldWishId: null,
    newWishId: 'lw-1',
    evicted: false,
    ...overrides,
  }
}

export function makePlanSyncResponse(overrides: Partial<PlanSyncResponse> = {}): PlanSyncResponse {
  return {
    proposal: makePlanProposal(),
    applyResult: makePlanApplyResponse(),
    changes: [],
    ...overrides,
  }
}

/** `POST /api/plan/sync-with-wish`'s response — the wish as created/updated
 * plus the same `PlanSyncResponse` shape `syncPlan()` returns. See
 * `PlanSyncWithWishResponse`'s doc comment (src/types/api.ts): `wish` is
 * present even when `sync.applyResult.accepted` is `false`. */
export function makePlanSyncWithWishResponse(
  overrides: Partial<PlanSyncWithWishResponse> = {},
): PlanSyncWithWishResponse {
  return {
    wish: makeLeaveWish(),
    sync: makePlanSyncResponse(),
    ...overrides,
  }
}