const test = require('node:test');
const assert = require('node:assert/strict');
const { planSync, slotKey } = require('../lib/spoolSync');
const { paletteMatch } = require('../lib/filaments');
const palette = require('../db/bambu-filaments.json').filaments;

const SERIAL = 'PRINTER1';
const tray = (slot, hex, uuid, extra = {}) => ({
  unit: 0, slot, empty: false, material: 'PLA', type: 'Basic', colour: hex, brand: 'PLA Basic',
  uuid, tagUid: uuid ? `TAG${slot}` : null, idName: null, weight: 1000, ...extra,
});

test('a tagged spool the shelf has never seen is created and named from the filament list', () => {
  const { actions, untracked } = planSync([], [tray(0, '#C12E1F', 'U-RED', { idName: 'A00-R0' })], SERIAL, palette);
  assert.equal(untracked.length, 0);
  assert.equal(actions.length, 1);
  assert.equal(actions[0].op, 'create');
  assert.equal(actions[0].slot, 'PRINTER1/0/0');
  assert.equal(actions[0].spool.colour, 'Red');
  assert.equal(actions[0].spool.code, '10200');
  assert.equal(actions[0].spool.colour_hex, '#C12E1F');
  assert.equal(actions[0].spool.product_code, 'A00-R0');
  assert.equal(actions[0].spool.total_g, 1000);
  assert.equal(actions[0].spool.remaining_g, null, 'an AMS lite can’t say how much is left');
});

test('a spool the shelf already knows is moved, not added again', () => {
  const existing = [{ id: 7, material: 'PLA', colour_hex: '#000000', rfid_uuid: 'U-BLACK',
    printer_serial: SERIAL, ams_slot: 'PRINTER1/0/3' }];
  const { actions } = planSync(existing, [tray(1, '#000000', 'U-BLACK')], SERIAL, palette);
  assert.deepEqual(actions, [{ op: 'update', id: 7, slot: 'PRINTER1/0/1', printerSerial: SERIAL, remaining: null }]);
});

test('a spool added by hand is adopted by the printer rather than duplicated', () => {
  // The Jade White spool added before the printer was connected.
  const existing = [{ id: 1, material: 'PLA', colour_hex: '#ffffff', rfid_uuid: null, printer_serial: null, ams_slot: null }];
  const { actions } = planSync(existing, [tray(3, '#FFFFFF', 'U-WHITE', { idName: 'A00-W1' })], SERIAL, palette);
  assert.equal(actions.length, 1);
  assert.equal(actions[0].op, 'adopt');
  assert.equal(actions[0].id, 1);
  assert.equal(actions[0].uuid, 'U-WHITE');
  assert.equal(actions[0].code, '10100');
});

test('one hand-added spool is adopted once, even with two matching trays', () => {
  const existing = [{ id: 1, material: 'PLA', colour_hex: '#FFFFFF', rfid_uuid: null }];
  const { actions } = planSync(existing, [tray(0, '#FFFFFF', 'U-W1'), tray(1, '#FFFFFF', 'U-W2')], SERIAL, palette);
  assert.deepEqual(actions.map((a) => a.op), ['adopt', 'create']);
});

test('a hand-added spool of another colour or material is left alone', () => {
  const existing = [
    { id: 1, material: 'PLA', colour_hex: '#FF0000', rfid_uuid: null },   // wrong colour
    { id: 2, material: 'PETG', colour_hex: '#FFFFFF', rfid_uuid: null },  // wrong material
  ];
  const { actions } = planSync(existing, [tray(0, '#FFFFFF', 'U-W')], SERIAL, palette);
  assert.deepEqual(actions.map((a) => a.op), ['create']);
});

test('an untagged spool is listed, not guessed at', () => {
  const { actions, untracked } = planSync([], [tray(2, '#123456', null)], SERIAL, palette);
  assert.deepEqual(actions, []);
  assert.deepEqual(untracked, [{ slot: 'PRINTER1/0/2', material: 'PLA', colour: '#123456' }]);
});

test('a spool this printer no longer reports is unloaded; other printers’ spools are not', () => {
  const existing = [
    { id: 5, material: 'PLA', colour_hex: '#000000', rfid_uuid: 'U-GONE', printer_serial: SERIAL, ams_slot: 'PRINTER1/0/0' },
    { id: 6, material: 'PLA', colour_hex: '#000000', rfid_uuid: 'U-ELSEWHERE', printer_serial: 'OTHER', ams_slot: 'OTHER/0/0' },
  ];
  const { actions } = planSync(existing, [], SERIAL, palette);
  assert.deepEqual(actions, [{ op: 'unload', id: 5 }]);
});

test('empty trays are ignored, and the external holder has its own slot key', () => {
  assert.deepEqual(planSync([], [{ empty: true, unit: 0, slot: 0 }], SERIAL, palette).actions, []);
  assert.equal(slotKey(SERIAL, { unit: null, slot: 254 }), 'PRINTER1/ext/254');
});

test('palette matching names a colour within its product line, and doesn’t guess', () => {
  assert.deepEqual(paletteMatch(palette, 'PLA', 'Basic', '#FFFFFF'), { name: 'Jade White', code: '10100', type: 'Basic' });
  assert.equal(paletteMatch(palette, 'PLA', 'Matte', '#FFFFFF').name, 'Ivory White');
  assert.equal(paletteMatch(palette, 'PLA', 'Basic', '#123456'), null);
});

test('an AMS that measures fills in grams left; an AMS lite never does', () => {
  const trays = [tray(0, '#C12E1F', 'U-RED', { remain: 42 })];
  const lite = planSync([], trays, SERIAL, palette, { measures: false });
  assert.equal(lite.actions[0].spool.remaining_g, null);
  const pro = planSync([], trays, SERIAL, palette, { measures: true });
  assert.equal(pro.actions[0].spool.remaining_g, 420);

  const existing = [{ id: 7, material: 'PLA', colour_hex: '#C12E1F', rfid_uuid: 'U-RED', printer_serial: SERIAL, ams_slot: 'PRINTER1/0/0' }];
  assert.equal(planSync(existing, trays, SERIAL, palette, { measures: true }).actions[0].remaining, 420);
  // No reading at all leaves the stored amount alone.
  const unknown = [tray(0, '#C12E1F', 'U-RED', { remain: null })];
  assert.equal(planSync(existing, unknown, SERIAL, palette, { measures: true }).actions[0].remaining, null);
});