import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import { describe, it } from "node:test";
import type {
  CircuitTreeResponseDto,
  ExternalProjectObjectDto,
  ExternalProjectObjectsDto,
} from "../src/frontend/types.js";
import {
  assignObjects,
  buildAssignablePlanObjects,
  buildPlanCircuits,
  buildPlanSections,
  buildRoomTree,
  countObjectsWithoutBoard,
  flattenRoomTree,
  previewNewCircuitIdentifiers,
  revalidatePlan,
  selectRange,
  unassignObjects,
} from "../src/frontend/utils/revit-assignment-model.js";
import { applyExternalObjectAssignmentPlan } from "../src/frontend/utils/api.js";

function object(id: string, overrides: Partial<ExternalProjectObjectDto> = {}): ExternalProjectObjectDto {
  return {
    id, worksharingId: `ws-${id}`, ifcGuid: null, deviceTypeId: "type-socket",
    familyAndType: "Steckdose: Doppel", selectionMarker: "SD", sourceCircuitIdentifier: "",
    sourceRoomNumber: "1.01", sourceRoomName: "Büro", roomId: "room-1",
    distributionBoardId: "board-1", linkedProjectDeviceId: null, circuitDeviceRowId: null,
    presenceStatus: "present",
    planningValues: {
      displayName: "Steckdose", category: "single_phase", connectionKind: null, effectiveQuantity: 2,
      powerPerUnitW: 200, simultaneityFactor: 1, cosPhi: null, costGroup: null, remark: null,
    },
    ...overrides,
  };
}

function objectsDto(objects: ExternalProjectObjectDto[]): ExternalProjectObjectsDto {
  return {
    currentRevision: 3, sourceName: "Revit", maxSocketsPerCircuit: 8, socketDeviceTypeIds: ["type-socket"],
    distributionBoards: [], projectDevices: [], objects,
  };
}

function tree(): CircuitTreeResponseDto {
  return {
    circuitListId: "list-1", distributionBoardId: "board-1", distributionBoardName: "UV 1",
    currentRevision: 3, singlePhaseVoltageV: 230, threePhaseVoltageV: 400,
    distributionBoardSimultaneityFactor: 1, distributionBoardTotalPower: 0,
    distributionBoardTotalPowerWithSimultaneityFactor: 0, headerComponents: [], footerComponents: [],
    sections: [{
      id: "section-2", key: "single", displayName: "1-phasig", prefix: "-2F1.", sortOrder: 20,
      category: "single_phase", groupNumber: 1, sectionTotalPower: 0, components: [],
      circuits: [{
        id: "circuit-1", circuitListId: "list-1", sectionId: "section-2", equipmentIdentifier: "-2F1.7",
        displayName: "Steckdose", sortOrder: 10, isReserve: false, circuitTotalPower: 0,
        circuitApparentPower: 0, circuitCosPhi: 1, downstreamBoardLoads: [],
        deviceRows: [{
          id: "row-1", sortOrder: 10, name: "Steckdose", displayName: "Steckdose", category: "single_phase",
          roomId: "room-1", quantity: 2, manualQuantity: 0, powerPerUnit: 0.2, simultaneityFactor: 1,
          rowTotalPower: 0.4, externalObjectCount: 1,
        }],
      }],
    }],
  };
}

describe("Revit assignment dialog model", () => {
  it("offers only present, unassigned objects of the board and counts objects without board", () => {
    const dto = objectsDto([
      object("free"),
      object("linked", { circuitDeviceRowId: "row-1" }),
      object("missing", { presenceStatus: "missing" }),
      object("other-board", { distributionBoardId: "board-2" }),
      object("no-board", { distributionBoardId: null }),
      object("light", { deviceTypeId: "type-light" }),
    ]);
    const planObjects = buildAssignablePlanObjects(dto, "board-1");
    assert.deepEqual(planObjects.map((entry) => [entry.id, entry.isSocket]), [["free", true], ["light", false]]);
    assert.equal(countObjectsWithoutBoard(dto), 1);

    const circuits = buildPlanCircuits(tree(), dto);
    assert.equal(circuits[0]!.linkedSocketQuantity, 2);
    assert.deepEqual(circuits[0]!.rows[0]!.linkedSelectionMarkers, ["SD"]);
    assert.deepEqual(buildPlanSections(tree()), [{ id: "section-2", category: "single_phase" }]);
  });

  it("builds a room tree without planned objects and selects ranges in visual order", () => {
    const dto = objectsDto([
      object("b", { roomId: "room-2", sourceRoomNumber: "1.10" }),
      object("a2"),
      object("a1"),
      object("x", { roomId: null, sourceRoomNumber: "", sourceRoomName: "" }),
    ]);
    const planObjects = buildAssignablePlanObjects(dto, "board-1");
    const rooms = buildRoomTree(planObjects, new Set(["a2"]), { search: "", deviceTypeId: "", socketsOnly: false });
    assert.deepEqual(rooms.map((room) => room.label), ["1.01 Büro", "1.10 Büro", "Ohne Raum"]);
    const ordered = flattenRoomTree(rooms);
    assert.deepEqual(ordered, ["a1", "b", "x"]);
    assert.deepEqual(selectRange(ordered, "a1", "x"), ["a1", "b", "x"]);
    assert.deepEqual(selectRange(ordered, null, "b"), ["b"]);
    assert.deepEqual(
      buildRoomTree(planObjects, new Set(), { search: "1.10", deviceTypeId: "", socketsOnly: false })
        .flatMap((room) => room.objectIds),
      ["b"]
    );
  });

  it("keeps valid assignments after a reload and previews BMKs without filling gaps", () => {
    const dto = objectsDto([object("a1"), object("a2")]);
    const planObjects = buildAssignablePlanObjects(dto, "board-1");
    let plan = assignObjects(
      { newCircuits: [{ key: "n1", sectionId: "section-2" }, { key: "n2", sectionId: "section-2" }], assignments: [], newRowChoices: [] },
      ["a1"],
      { kind: "new-circuit", key: "n1" }
    );
    plan = assignObjects(plan, ["a2"], { kind: "new-circuit", key: "n2" });
    assert.deepEqual([...previewNewCircuitIdentifiers(tree(), plan).values()], ["-2F1.8", "-2F1.9"]);

    const reloaded = revalidatePlan(plan, planObjects.filter((entry) => entry.id !== "a2"), buildPlanCircuits(tree(), dto), buildPlanSections(tree()));
    assert.equal(reloaded.removedCount, 1);
    assert.deepEqual(reloaded.plan.newCircuits.map((entry) => entry.key), ["n1"]);
    assert.deepEqual(unassignObjects(plan, ["a1", "a2"]).newCircuits, []);
  });

  it("posts the plan to the assignment-plan route", async () => {
    const requests: Array<{ url: string; method: string; body: unknown }> = [];
    const originalFetch = globalThis.fetch;
    globalThis.fetch = async (input, init) => {
      requests.push({ url: String(input), method: init?.method ?? "GET", body: JSON.parse(String(init?.body)) });
      return new Response(JSON.stringify({ history: { currentRevision: 4 }, newCircuitIds: [] }), { status: 200, headers: { "Content-Type": "application/json" } });
    };
    try {
      const body = {
        expectedRevision: 3, circuitListId: "list-1", newCircuits: [],
        rows: [{ kind: "existing-row" as const, rowId: "row-1", objectIds: ["a1"] }],
        confirmedConflictObjectIds: [], confirmedOverLimitCircuitKeys: [],
      };
      await applyExternalObjectAssignmentPlan("project-1", body);
      assert.deepEqual(requests, [{ url: "/api/projects/project-1/external-model/objects/assignment-plan", method: "POST", body }]);
    } finally {
      globalThis.fetch = originalFetch;
    }
  });

  it("replaces the drawer with the assignment dialog in the editor", () => {
    const editor = readFileSync("src/frontend/components/circuit-tree-editor.tsx", "utf8");
    const dialog = readFileSync("src/frontend/components/revit-assignment-dialog.tsx", "utf8");
    assert.doesNotMatch(editor, /revit-object-drawer|x-revit-object-ids|assignExternalProjectObjectsTo/);
    assert.match(editor, /Revit-Objekte zuordnen/);
    assert.match(editor, /RevitLinkedObjectsDialog/);
    assert.match(dialog, /Automatisch aufteilen/);
    assert.match(dialog, /Überschreitung ausdrücklich bestätigen/);
    assert.match(dialog, /Abweichungen bestätigen/);
  });
});