import assert from "node:assert/strict";
import { describe, it } from "node:test";
import {
  buildCostGroupFilterOptions,
  buildFloorFilterOptions,
  buildSupplyTypeFilterOptions,
  emptyDistributionBoardFilters,
  emptyProjectDeviceFilters,
  filterDistributionBoards,
  filterProjectDevices,
  isDistributionBoardFilterActive,
  isProjectDeviceFilterActive,
  retainAvailableFilterValues,
  toggleFilterValue,
  withoutCostGroupFilterId,
  withoutFloorFilterId,
  withoutSupplyTypeFilterId,
} from "../src/frontend/utils/overview-filters.js";
import type {
  DistributionBoardDto,
  FloorDto,
  ProjectDeviceDto,
} from "../src/frontend/types.js";

type TestBoard = Pick<
  DistributionBoardDto,
  "id" | "name" | "floorId" | "supplyType"
>;

function board(
  id: string,
  name: string,
  floorId: string | null,
  supplyType: DistributionBoardDto["supplyType"]
): TestBoard {
  return { id, name, floorId, supplyType };
}

function device(
  id: string,
  overrides: Partial<ProjectDeviceDto>
): ProjectDeviceDto {
  return {
    id,
    projectId: "project-1",
    name: `device-${id}`,
    displayName: `Gerät ${id}`,
    phaseType: "single_phase",
    connectionKind: null,
    costGroup: null,
    category: "single_phase",
    quantity: 1,
    powerPerUnit: 1,
    simultaneityFactor: 1,
    totalPower: 1,
    cosPhi: null,
    remark: null,
    voltageV: null,
    ...overrides,
  };
}

const floors: FloorDto[] = [
  { id: "floor-og", projectId: "project-1", name: "1. OG", sortOrder: 2 },
  { id: "floor-eg", projectId: "project-1", name: "EG", sortOrder: 1 },
];
const floorNameById = new Map(floors.map((floor) => [floor.id, floor.name]));

const boards = [
  board("b1", "UV-EG-01", "floor-eg", "AV"),
  board("b2", "UV-OG-01", "floor-og", "SV"),
  board("b3", "HV", null, "AV"),
  board("b4", "SiBe-Zentrale", null, null),
];

describe("overview filters: distribution boards", () => {
  it("returns every board without an active filter", () => {
    assert.equal(isDistributionBoardFilterActive(emptyDistributionBoardFilters), false);
    assert.deepEqual(
      filterDistributionBoards(boards, emptyDistributionBoardFilters, floorNameById),
      boards
    );
  });

  it("also searches board number and location when the boards carry them", () => {
    const withInfo = [
      { ...boards[0]!, boardNumber: "UV 0.1", location: "Raum 003 Technik" },
      { ...boards[1]!, boardNumber: null, location: null },
    ];
    assert.deepEqual(
      filterDistributionBoards(
        withInfo,
        { ...emptyDistributionBoardFilters, query: "uv 0.1" },
        floorNameById
      ).map((entry) => entry.id),
      [withInfo[0]!.id]
    );
    assert.deepEqual(
      filterDistributionBoards(
        withInfo,
        { ...emptyDistributionBoardFilters, query: "technik" },
        floorNameById
      ).map((entry) => entry.id),
      [withInfo[0]!.id]
    );
  });

  it("searches board and floor names case-insensitively and ignores blank queries", () => {
    const byFloorName = filterDistributionBoards(
      boards,
      { ...emptyDistributionBoardFilters, query: "  og " },
      floorNameById
    );
    assert.deepEqual(byFloorName.map((entry) => entry.id), ["b2"]);
    const byBoardName = filterDistributionBoards(
      boards,
      { ...emptyDistributionBoardFilters, query: "sibe" },
      floorNameById
    );
    assert.deepEqual(byBoardName.map((entry) => entry.id), ["b4"]);
    assert.equal(
      isDistributionBoardFilterActive({ ...emptyDistributionBoardFilters, query: "   " }),
      false
    );
  });

  it("filters floors with the dedicated option for boards without floor", () => {
    const result = filterDistributionBoards(
      boards,
      { ...emptyDistributionBoardFilters, floorIds: ["floor-eg", withoutFloorFilterId] },
      floorNameById
    );
    assert.deepEqual(result.map((entry) => entry.id), ["b1", "b3", "b4"]);
  });

  it("combines supply type with the other criteria", () => {
    const filters = {
      query: "",
      floorIds: [withoutFloorFilterId],
      supplyTypes: ["AV"],
    };
    assert.equal(isDistributionBoardFilterActive(filters), true);
    assert.deepEqual(
      filterDistributionBoards(boards, filters, floorNameById).map((entry) => entry.id),
      ["b3"]
    );
    assert.deepEqual(
      filterDistributionBoards(
        boards,
        { ...emptyDistributionBoardFilters, supplyTypes: [withoutSupplyTypeFilterId] },
        floorNameById
      ).map((entry) => entry.id),
      ["b4"]
    );
  });

  it("offers floors in configured order followed by 'Ohne Etage'", () => {
    assert.deepEqual(buildFloorFilterOptions(floors), [
      { id: "floor-eg", label: "EG" },
      { id: "floor-og", label: "1. OG" },
      { id: withoutFloorFilterId, label: "Ohne Etage" },
    ]);
  });

  it("offers enabled and used supply types in catalog order", () => {
    const options = buildSupplyTypeFilterOptions(
      ["AV", "SV", "EV", "USV"],
      ["USV", "AV"],
      boards,
      { AV: "AV – Allgemein", SV: "SV – Sicherheit" }
    );
    assert.deepEqual(options, [
      { id: "AV", label: "AV – Allgemein" },
      { id: "SV", label: "SV – Sicherheit" },
      { id: "USV", label: "USV" },
      { id: withoutSupplyTypeFilterId, label: "Nicht festgelegt" },
    ]);
  });
});

describe("overview filters: project devices", () => {
  const devices = [
    device("d1", {
      displayName: "Steckdose Büro",
      costGroup: "444",
      connectionKind: "Steckdose",
    }),
    device("d2", {
      displayName: "Durchlauferhitzer",
      phaseType: "three_phase",
      category: "three_phase",
      costGroup: " 445 ",
    }),
    device("d3", {
      displayName: "Downlight",
      category: "lighting",
      costGroup: "  ",
    }),
    device("d4", { displayName: "Kaffeemaschine", costGroup: null }),
  ];

  it("searches names, connection kind, cost group and the German category label", () => {
    assert.deepEqual(
      filterProjectDevices(devices, { ...emptyProjectDeviceFilters, query: "STECK" }).map(
        (entry) => entry.id
      ),
      ["d1"]
    );
    assert.deepEqual(
      filterProjectDevices(
        devices,
        { ...emptyProjectDeviceFilters, query: "beleucht" },
        { lighting: "Beleuchtung" }
      ).map((entry) => entry.id),
      ["d3"]
    );
  });

  it("filters category, phase type and cost group together", () => {
    const filters = {
      query: "",
      categories: ["single_phase", "three_phase"],
      phaseTypes: ["three_phase"],
      costGroups: ["445"],
    };
    assert.equal(isProjectDeviceFilterActive(filters), true);
    assert.deepEqual(
      filterProjectDevices(devices, filters).map((entry) => entry.id),
      ["d2"]
    );
  });

  it("treats blank cost groups as 'Ohne Kostengruppe'", () => {
    assert.deepEqual(
      filterProjectDevices(devices, {
        ...emptyProjectDeviceFilters,
        costGroups: [withoutCostGroupFilterId],
      }).map((entry) => entry.id),
      ["d3", "d4"]
    );
    assert.deepEqual(buildCostGroupFilterOptions(devices), [
      { id: "444", label: "444" },
      { id: "445", label: "445" },
      { id: withoutCostGroupFilterId, label: "Ohne Kostengruppe" },
    ]);
  });

  it("returns an empty list when the filters hide every device", () => {
    assert.deepEqual(
      filterProjectDevices(devices, { ...emptyProjectDeviceFilters, query: "gibt es nicht" }),
      []
    );
    assert.equal(isProjectDeviceFilterActive(emptyProjectDeviceFilters), false);
  });
});

describe("overview filters: selection helpers", () => {
  it("toggles values without mutating the selection", () => {
    const selected = ["a"];
    assert.deepEqual(toggleFilterValue(selected, "b"), ["a", "b"]);
    assert.deepEqual(toggleFilterValue(selected, "a"), []);
    assert.deepEqual(selected, ["a"]);
  });

  it("drops selected values that are no longer offered", () => {
    assert.deepEqual(
      retainAvailableFilterValues(["floor-eg", "deleted-floor"], buildFloorFilterOptions(floors)),
      ["floor-eg"]
    );
  });
});