/// <reference path="../pb_data/types.d.ts" />
//
// M7 — Add structured VIN and duration fields to appointments.
//
// Older scan imports stored these values inside `notes` as:
//   VIN: <value> | Duration: <number> min
// This migration adds first-class columns, backfills them when missing, and
// removes those machine-generated note fragments while preserving any real text.
//

function compactNoteParts(raw) {
  return String(raw || '')
    .split('|')
    .map((part) => part.trim())
    .filter(Boolean);
}

migrate(
  (db) => {
    const col = db.findCollectionByNameOrId('appointments');
    if (!col) {
      console.warn('[M7] appointments collection not found — skipping');
      return;
    }

    if (!col.fields.find((f) => f.name === 'vin')) {
      col.fields.push(new TextField({ name: 'vin', required: false }));
      db.save(col);
      console.log('[M7] added vin field to appointments');
    }

    if (!col.fields.find((f) => f.name === 'durationMinutes')) {
      col.fields.push(new NumberField({
        name: 'durationMinutes',
        required: false,
        min: 0,
      }));
      db.save(col);
      console.log('[M7] added durationMinutes field to appointments');
    }

    const records = Array.from(db.findRecordsByFilter('appointments', '1=1', 'id', 500));
    let backfilled = 0;

    for (const rec of records) {
      const rawNotes = String(rec.get('notes') || '');
      const vinMatch = rawNotes.match(/(?:^|\|)\s*VIN:\s*([^|]+?)\s*(?=\||$)/i);
      const durationMatch = rawNotes.match(/(?:^|\|)\s*Duration:\s*(\d+)\s*min\s*(?=\||$)/i);
      const nextVin = String(rec.get('vin') || '').trim();
      const rawDuration = rec.get('durationMinutes');
      const nextDuration = rawDuration == null || rawDuration === '' ? null : Number(rawDuration);

      let changed = false;

      if (!nextVin && vinMatch?.[1]) {
        rec.set('vin', String(vinMatch[1]).trim());
        changed = true;
      }

      if ((nextDuration == null || Number.isNaN(nextDuration)) && durationMatch?.[1]) {
        rec.set('durationMinutes', Number(durationMatch[1]));
        changed = true;
      }

      const cleanedNotes = compactNoteParts(rawNotes)
        .filter((part) => !/^VIN:\s*/i.test(part) && !/^Duration:\s*\d+\s*min$/i.test(part))
        .join(' | ');

      if (cleanedNotes !== rawNotes.trim()) {
        rec.set('notes', cleanedNotes);
        changed = true;
      }

      if (changed) {
        db.saveRecord(rec);
        backfilled++;
      }
    }

    console.log(`[M7] updated ${backfilled} appointment record(s)`);
  },
  (db) => {
    const col = db.findCollectionByNameOrId('appointments');
    if (!col) return;

    const durationIdx = col.fields.findIndex((f) => f.name === 'durationMinutes');
    if (durationIdx >= 0) {
      col.fields.splice(durationIdx, 1);
      db.save(col);
    }

    const vinIdx = col.fields.findIndex((f) => f.name === 'vin');
    if (vinIdx >= 0) {
      col.fields.splice(vinIdx, 1);
      db.save(col);
    }
  }
);