import assert from "node:assert/strict";
import { describe, it } from "node:test";
import {
  allColumns,
  buildCircuitEditPatch,
  buildDeviceRowEditPatch,
  formatValue,
  getBlockSortValue,
  getCellKind,
  getCircuitValue,
  getDeviceValue,
  parseNumeric,
} from "../src/frontend/utils/circuit-grid-model.js";
import type { CircuitTreeCircuitDto, CircuitTreeDeviceRowDto } from "../src/frontend/types.js";

const device: CircuitTreeDeviceRowDto = {
  id: "row-1",
  sortOrder: 10,
  name: "Technical light",
  displayName: "Office light",
  phaseType: "single_phase",
  roomNumberSnapshot: "1.01",
  roomNameSnapshot: "Office",
  quantity: 2,
  powerPerUnit: 0.05,
  simultaneityFactor: 0.8,
  rowTotalPower: 0.08,
  remark: "Device remark",
};

const circuit: CircuitTreeCircuitDto = {
  id: "circuit-1",
  circuitListId: "list-1",
  sectionId: "section-1",
  equipmentIdentifier: "-1F1",
  displayName: "Lighting circuit",
  sortOrder: 10,
  protectionType: "MCB",
  protectionRatedCurrent: 16,
  protectionCharacteristic: "B",
  cableType: "NYM-J",
  cableCrossSection: "1.5 mm²",
  cableLength: 20,
  voltage: 230,
  controlRequirement: "DALI",
  isReserve: false,
  remark: "Circuit remark",
  circuitTotalPower: 0.08,
  deviceRows: [device],
};

describe("circuit grid model", () => {
  it("keeps the equipment identifier locked as the first column", () => {
    assert.equal(allColumns[0].key, "equipmentIdentifier");
    assert.equal(allColumns[0].locked, true);
  });

  it("maps shared fields to the correct level for every row shape", () => {
    assert.equal(getCellKind("circuitCompact", "displayName"), "deviceField");
    assert.equal(getCellKind("circuitCompact", "equipmentIdentifier"), "circuitField");
    assert.equal(getCellKind("circuitSummary", "displayName"), "circuitField");
    assert.equal(getCellKind("deviceRow", "displayName"), "deviceField");
    assert.equal(getCellKind("reserveCircuit", "remark"), "deviceField");
    assert.equal(getCellKind("placeholder", "displayName"), "deviceField");
    assert.equal(getCellKind("deviceRow", "equipmentIdentifier"), "readonly");
    assert.equal(getCellKind("circuitSummary", "controlRequirement"), "circuitField");
    assert.equal(getCellKind("deviceRow", "controlRequirement"), "readonly");
    assert.equal(getCellKind("circuitCompact", "rowTotalPower"), "computed");
  });

  it("projects circuit and device values without mixing ownership", () => {
    assert.equal(getDeviceValue(device, "roomSummary"), "1.01 Office");
    assert.equal(getDeviceValue(device, "rowTotalPower"), 0.08);
    assert.equal(getCircuitValue(circuit, "protectionSummary"), "MCB 16A B");
    assert.equal(getCircuitValue(circuit, "voltage"), 230);
    assert.equal(getCircuitValue(circuit, "controlRequirement"), "DALI");
    assert.equal(getCircuitValue(circuit, "cableSummary"), "NYM-J, 1.5 mm², 20 m");
  });

  it("formats displayed numeric values without changing their stored precision", () => {
    assert.equal(formatValue(0.123456, "powerPerUnit"), "0,123");
    assert.equal(formatValue(0.87654, "simultaneityFactor"), "0,88");
    assert.equal(formatValue(230.4, "voltage"), "230");
    assert.equal(formatValue(16, "protectionRatedCurrent"), "16");
    assert.equal(formatValue("single_phase", "phaseType"), "1-phasig");
    assert.equal(formatValue("three_phase", "phaseType"), "3-phasig");
  });

  it("uses circuit display values for block sorting and falls back to the first device", () => {
    assert.equal(getBlockSortValue(circuit, "displayName"), "Lighting circuit");
    assert.equal(getBlockSortValue({ ...circuit, displayName: undefined }, "displayName"), "Office light");
    assert.equal(getBlockSortValue(circuit, "quantity"), 2);
  });

  it("parses numeric drafts and rejects invalid values", () => {
    assert.equal(parseNumeric("quantity", " 2.5 "), 2.5);
    assert.equal(parseNumeric("quantity", ""), undefined);
    assert.throws(() => parseNumeric("quantity", "two"), /Ungültiger Zahlenwert/);
  });

  it("builds nullable circuit command patches from grid drafts", () => {
    assert.deepEqual(buildCircuitEditPatch("voltage", ""), {
      voltage: null,
    });
    assert.deepEqual(
      buildCircuitEditPatch("controlRequirement", " DALI "),
      { controlRequirement: "DALI" }
    );
    assert.deepEqual(buildCircuitEditPatch("isReserve", "ja"), {
      isReserve: true,
    });
  });

  it("builds device command patches with explicit clearing semantics", () => {
    assert.deepEqual(buildDeviceRowEditPatch("roomSummary", ""), {
      roomNumberSnapshot: null,
      roomNameSnapshot: null,
    });
    assert.deepEqual(
      buildDeviceRowEditPatch("roomSummary", "1.01 Büro"),
      {
        roomNumberSnapshot: "1.01",
        roomNameSnapshot: "Büro",
      }
    );
    assert.deepEqual(buildDeviceRowEditPatch("technicalName", " Leuchte "), {
      name: "Leuchte",
    });
    assert.throws(
      () => buildDeviceRowEditPatch("quantity", ""),
      /darf nicht leer sein/
    );
  });
});