/**
 * Shared "extras" for every Lab provider profile (all craft kinds).
 *
 * The coach profile pioneered these fields; rather than copy them 12 times,
 * this module defines ONE parser + option sets that every craft's form and the
 * shared detail page use. The tags are identical across crafts:
 *
 *   language / availability / rate_amount / rate_currency / rate_unit /
 *   payment_method / payment_note / booking_fee / booking_fee_currency /
 *   pay_what_you_can / photo / video / booking
 *
 * Craft-specific *context* stays in each form's `skillSections` + `extraFields`;
 * this is the craft-agnostic enrichment (how to reach them, how to pay, media).
 */
import { COACH_PAYMENT_METHODS } from '@/lib/coachOptions';

/** A stored value + its i18n key. */
export interface LabOption {
  value: string;
  key: string;
}

/** Currencies a provider can price in (sats first — it's a Bitcoin app). */
export const RATE_CURRENCIES: LabOption[] = [
  { value: 'sats', key: 'labUi.coachForm.rateCurrencySats' },
  { value: 'USD', key: 'labUi.coachForm.rateCurrencyUsd' },
  { value: 'EUR', key: 'labUi.coachForm.rateCurrencyEur' },
  { value: 'GBP', key: 'labUi.coachForm.rateCurrencyGbp' },
];

/** Every billing unit any craft might use (forms pick a subset by context). */
export const ALL_RATE_UNITS: LabOption[] = [
  { value: 'hour', key: 'labUi.coachForm.perHour' },
  { value: 'session', key: 'labUi.coachForm.perSession' },
  { value: 'half-day', key: 'labUi.coachForm.perHalfDay' },
  { value: 'day', key: 'labUi.coachForm.perDay' },
  { value: 'project', key: 'labUi.coachForm.perProject' },
  { value: 'event', key: 'labUi.coachForm.perEvent' },
  { value: 'gig', key: 'labUi.coachForm.perGig' },
  { value: 'shoot', key: 'labUi.coachForm.perShoot' },
  { value: 'piece', key: 'labUi.coachForm.perPiece' },
  { value: 'cut', key: 'labUi.coachForm.perCut' },
  { value: 'month', key: 'labUi.coachForm.perMonth' },
];

/** Sensible default units when a craft doesn't specify its own. */
export const DEFAULT_RATE_UNITS: LabOption[] = ALL_RATE_UNITS.filter((u) =>
  ['hour', 'session', 'half-day', 'day', 'project'].includes(u.value),
);

/** Pick a craft-specific subset of billing units, in the canonical order. */
export function pickRateUnits(...values: string[]): LabOption[] {
  return ALL_RATE_UNITS.filter((u) => values.includes(u.value));
}

/** Generic availability windows — union of coach + craft conventions. */
export const AVAILABILITY_OPTIONS: LabOption[] = [
  { value: 'weekdays', key: 'labUi.coachForm.availWeekdays' },
  { value: 'weekends', key: 'labUi.coachForm.availWeekends' },
  { value: 'evenings', key: 'labUi.coachForm.availEvenings' },
  { value: 'after-school', key: 'labUi.coachForm.availAfterSchool' },
  { value: 'school-holidays', key: 'labUi.coachForm.availHolidays' },
  { value: 'by-appointment', key: 'labUi.coachForm.availByAppointment' },
  { value: 'seasonal', key: 'labUi.coachForm.availSeasonal' },
];

/** Accepted payment methods (shared with the coach profile). */
export const PAYMENT_METHODS = COACH_PAYMENT_METHODS;

/** The craft-agnostic enrichment parsed off any Lab provider event. */
export interface LabExtras {
  languages: string[];
  availability: string[];
  rateAmount?: string;
  rateCurrency?: string;
  rateUnit?: string;
  paymentMethods: string[];
  paymentNote?: string;
  bookingFee?: string;
  bookingFeeCurrency?: string;
  payWhatYouCan: boolean;
  photos: string[];
  video?: string;
  booking?: string;
  // Coach-origin facets (kept here so the Lab filter reads one source for all
  // crafts; other crafts simply leave them empty).
  formats: string[];
  levels: string[];
  ageGroups: string[];
  credentials: string[];
  certNote?: string;
}

/** Read the shared extras off any Lab provider event (craft-agnostic). Accepts
 *  anything with a `tags` array, so draft/preview tag lists work too. */
export function parseLabExtras(event: { tags: string[][] }): LabExtras {
  const tag = (n: string) => event.tags.find(([t]) => t === n)?.[1];
  const vals = (n: string, lower = true): string[] => [
    ...new Set(
      event.tags
        .filter(([t, v]) => t === n && !!v?.trim())
        .map(([, v]) => (lower ? v.trim().toLowerCase() : v.trim())),
    ),
  ];

  return {
    languages: vals('language', false),
    availability: vals('availability'),
    rateAmount: tag('rate_amount'),
    rateCurrency: tag('rate_currency'),
    rateUnit: tag('rate_unit'),
    paymentMethods: vals('payment_method'),
    paymentNote: tag('payment_note'),
    bookingFee: tag('booking_fee'),
    bookingFeeCurrency: tag('booking_fee_currency'),
    payWhatYouCan: event.tags.some(([t, v]) => t === 'pay_what_you_can' && v === 'true'),
    photos: event.tags
      .filter(([t, v]) => t === 'photo' && !!v?.trim())
      .map(([, v]) => v.trim())
      .filter((v, i, arr) => arr.indexOf(v) === i)
      .slice(0, 12),
    video: tag('video'),
    booking: tag('booking'),
    formats: vals('format'),
    levels: vals('level'),
    ageGroups: vals('age'),
    credentials: vals('cert'),
    certNote: tag('cert_note'),
  };
}

/** Resolve a stored option value to its translated label (raw value fallback). */
export function labOptionLabel(
  options: LabOption[],
  value: string,
  t: (key: string) => string,
): string {
  const key = options.find((o) => o.value === value)?.key;
  return key ? t(key) : value;
}