/// <reference path="../pb_data/types.d.ts" />
migrate(
  (app) => {
    // v3 menu_items: POS-friendly schema. Variants are separate products with
    // a numeric rupee price; is_veg replaces the text group; adds sku,
    // available and tax_category. The old collection only held the previous
    // menu sync, so it is replaced wholesale (records are re-synced by
    // scripts/update-menu.mjs).
    try {
      const oldCollection = app.findCollectionByNameOrId('menu_items')
      app.delete(oldCollection)
    } catch (e) {
      // collection may not exist on a fresh database — nothing to migrate
    }

    const collection = new Collection({
      name: 'menu_items',
      type: 'base',
      listRule: '',
      viewRule: '',
      createRule: null,
      updateRule: null,
      deleteRule: null,
      fields: [
        { name: 'uid', type: 'text', required: true },
        { name: 'category', type: 'text', required: true },
        { name: 'name', type: 'text', required: true },
        { name: 'variant', type: 'text' },
        { name: 'description', type: 'text' },
        { name: 'price', type: 'number', required: true },
        { name: 'diet', type: 'select', maxSelect: 1, values: ['veg', 'nonveg', 'mixed'] },
        { name: 'pairing', type: 'text' },
        { name: 'tag', type: 'text' },
        { name: 'image', type: 'text' },
        { name: 'sku', type: 'text' },
        { name: 'available', type: 'bool' },
        { name: 'tax_category', type: 'text' },
        { name: 'sort', type: 'number' },
      ],
      indexes: [
        'CREATE UNIQUE INDEX idx_menu_items_uid ON menu_items (uid)',
        'CREATE UNIQUE INDEX idx_menu_items_sku ON menu_items (sku) WHERE sku != \'\'',
      ],
    })
    return app.save(collection)
  },
  (app) => {
    // Revert to the v2 schema.
    try {
      const newCollection = app.findCollectionByNameOrId('menu_items')
      app.delete(newCollection)
    } catch (e) {
      // nothing to revert
    }

    const collection = new Collection({
      name: 'menu_items',
      type: 'base',
      listRule: '',
      viewRule: '',
      createRule: null,
      updateRule: null,
      deleteRule: null,
      fields: [
        { name: 'uid', type: 'text', required: true },
        { name: 'category', type: 'text', required: true },
        { name: 'name', type: 'text', required: true },
        { name: 'description', type: 'text' },
        { name: 'price', type: 'text' },
        { name: 'pairing', type: 'text' },
        { name: 'tag', type: 'text' },
        { name: 'image', type: 'text' },
        { name: 'group', type: 'text' },
        { name: 'sort', type: 'number' },
      ],
      indexes: ['CREATE UNIQUE INDEX idx_menu_items_uid ON menu_items (uid)'],
    })
    return app.save(collection)
  }
)