import assert from "node:assert/strict";
import { describe, it } from "node:test";
import { CircuitWriteService } from "../src/domain/services/circuit-write.service.js";

describe("circuit write service rules", () => {
  it("renumber uses safe bulk identifier update for swapped identifiers", async () => {
    let safeUpdatePayload: Array<{ id: string; equipmentIdentifier: string }> = [];
    const service = new CircuitWriteService({
      circuitSectionRepository: {
        async findById() {
          return { id: "s1", circuitListId: "l1", prefix: "-2F" } as never;
        },
      } as never,
      circuitRepository: {
        async listBySection() {
          return [
            { id: "cB", sectionId: "s1", equipmentIdentifier: "-2F2", sortOrder: 10, isReserve: 0 },
            { id: "cA", sectionId: "s1", equipmentIdentifier: "-2F1", sortOrder: 20, isReserve: 1 },
          ] as never[];
        },
        async listByCircuitList() {
          return [{ id: "x1", sectionId: "s2", equipmentIdentifier: "-3F1" }] as never[];
        },
      } as never,
      circuitSectionTransactionStore: {
        updateEquipmentIdentifiers(_listId: string, updates: Array<{ id: string; equipmentIdentifier: string }>) {
          safeUpdatePayload = updates;
        },
      } as never,
    });

    const result = await service.renumberSection("s1");
    assert.deepEqual(safeUpdatePayload, [
      { id: "cB", equipmentIdentifier: "-2F1" },
      { id: "cA", equipmentIdentifier: "-2F2" },
    ]);
    assert.equal(result.length, 2);
  });

  it("renumber shifts forward/backward and respects other sections", async () => {
    let safeUpdatePayload: Array<{ id: string; equipmentIdentifier: string }> = [];
    const service = new CircuitWriteService({
      circuitSectionRepository: {
        async findById() {
          return { id: "s1", circuitListId: "l1", prefix: "-1F" } as never;
        },
      } as never,
      circuitRepository: {
        async listBySection() {
          return [
            { id: "c2", sectionId: "s1", equipmentIdentifier: "-1F5", sortOrder: 10, isReserve: 0 },
            { id: "c1", sectionId: "s1", equipmentIdentifier: "-1F1", sortOrder: 20, isReserve: 0 },
            { id: "c3", sectionId: "s1", equipmentIdentifier: "-1F9", sortOrder: 30, isReserve: 0 },
          ] as never[];
        },
        async listByCircuitList() {
          return [{ id: "o1", sectionId: "s2", equipmentIdentifier: "-1F2" }] as never[];
        },
      } as never,
      circuitSectionTransactionStore: {
        updateEquipmentIdentifiers(_listId: string, updates: Array<{ id: string; equipmentIdentifier: string }>) {
          safeUpdatePayload = updates;
        },
      } as never,
    });

    await service.renumberSection("s1");
    assert.deepEqual(safeUpdatePayload, [
      { id: "c2", equipmentIdentifier: "-1F1" },
      { id: "c1", equipmentIdentifier: "-1F3" },
      { id: "c3", equipmentIdentifier: "-1F4" },
    ]);
  });

  it("renumber handles gaps and keeps device rows untouched by identifier-only update path", async () => {
    let safeCalled = 0;
    const service = new CircuitWriteService({
      circuitSectionRepository: {
        async findById() {
          return { id: "s1", circuitListId: "l1", prefix: "-1F" } as never;
        },
      } as never,
      circuitRepository: {
        async listBySection() {
          return [
            { id: "c1", sectionId: "s1", equipmentIdentifier: "-1F1", sortOrder: 10, isReserve: 0 },
            { id: "c2", sectionId: "s1", equipmentIdentifier: "-1F5", sortOrder: 20, isReserve: 0 },
            { id: "c3", sectionId: "s1", equipmentIdentifier: "-1F9", sortOrder: 30, isReserve: 0 },
          ] as never[];
        },
        async listByCircuitList() {
          return [] as never[];
        },
      } as never,
      circuitSectionTransactionStore: {
        updateEquipmentIdentifiers() {
          safeCalled += 1;
        },
      } as never,
      deviceRowRepository: {
        async update() {
          throw new Error("device rows must not be touched");
        },
      } as never,
    });

    await service.renumberSection("s1");
    assert.equal(safeCalled, 1);
  });

  it("moving a device row to another circuit preserves row and toggles reserve flags", async () => {
    let transactionalMove:
      | {
          rows: Array<{ id: string; expectedCircuitId: string }>;
          targetCircuitId?: string;
          createTargetCircuit?: unknown;
        }
      | undefined;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
      } as never,
      deviceRowTransactionStore: {
        moveRows(input: typeof transactionalMove) {
          transactionalMove = input;
          return {
            movedRowIds: input!.rows.map((row) => row.id),
            targetCircuitId: input!.targetCircuitId!,
          };
        },
      } as never,
      circuitRepository: {
        async findById(circuitId: string) {
          if (circuitId === "c1") {
            return {
              id: "c1",
              sectionId: "s1",
              circuitListId: "l1",
              equipmentIdentifier: "-1F1",
              sortOrder: 10,
              isReserve: 0,
            } as never;
          }
          return {
            id: "c2",
            sectionId: "s1",
            circuitListId: "l1",
            equipmentIdentifier: "-1F2",
            sortOrder: 20,
            isReserve: 1,
          } as never;
        },
      } as never,
    });

    await service.moveDeviceRow("r1", { targetCircuitId: "c2" });
    assert.deepEqual(transactionalMove, {
      rows: [{ id: "r1", expectedCircuitId: "c1" }],
      targetCircuitId: "c2",
      createTargetCircuit: undefined,
    });
  });

  it("moving a device row to placeholder creates a new circuit in target section", async () => {
    let preparedTarget:
      | {
          circuitListId: string;
          sectionId: string;
          equipmentIdentifier: string;
          displayName: string;
          sortOrder: number;
        }
      | undefined;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
      } as never,
      deviceRowTransactionStore: {
        moveRows(input: { rows: Array<{ id: string }>; createTargetCircuit?: typeof preparedTarget }) {
          preparedTarget = input.createTargetCircuit;
          return {
            movedRowIds: input.rows.map((row) => row.id),
            targetCircuitId: "c-new",
            createdCircuitId: "c-new",
          };
        },
      } as never,
      circuitRepository: {
        async findById(circuitId: string) {
          if (circuitId === "c1") {
            return {
              id: "c1",
              sectionId: "s1",
              circuitListId: "l1",
              equipmentIdentifier: "-1F1",
              sortOrder: 10,
              isReserve: 0,
            } as never;
          }
          return null as never;
        },
        async listBySection() {
          return [{ sortOrder: 40 }] as never[];
        },
      } as never,
      circuitSectionRepository: {
        async findById() {
          return { id: "s2", circuitListId: "l1", prefix: "-2F" } as never;
        },
      } as never,
      numberingService: {
        async getNextIdentifier() {
          return "-2F8";
        },
      } as never,
    });

    await service.moveDeviceRow("r1", { targetSectionId: "s2", createNewCircuit: true });
    assert.deepEqual(preparedTarget, {
      circuitListId: "l1",
      sectionId: "s2",
      equipmentIdentifier: "-2F8",
      displayName: "Neuer Stromkreis",
      sortOrder: 50,
    });
  });

  it("moving a device row to its current circuit remains a no-op", async () => {
    let transactionalMoveCount = 0;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
      } as never,
      deviceRowTransactionStore: {
        moveRows() {
          transactionalMoveCount += 1;
          throw new Error("same-circuit move must not write");
        },
      } as never,
      circuitRepository: {
        async findById() {
          return {
            id: "c1",
            sectionId: "s1",
            circuitListId: "l1",
            equipmentIdentifier: "-1F1",
            sortOrder: 10,
            isReserve: 0,
          } as never;
        },
      } as never,
    });

    const result = await service.moveDeviceRow("r1", { targetCircuitId: "c1" });
    assert.equal(transactionalMoveCount, 0);
    assert.equal(result?.id, "r1");
  });

  it("moving multiple device rows to a circuit preserves input order and toggles reserve", async () => {
    let transactionalMove:
      | {
          rows: Array<{ id: string; expectedCircuitId: string }>;
          targetCircuitId?: string;
          createTargetCircuit?: unknown;
        }
      | undefined;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById(rowId: string) {
          if (rowId === "r1") {
            return { id: "r1", circuitId: "c1" } as never;
          }
          return { id: "r2", circuitId: "c2" } as never;
        },
      } as never,
      deviceRowTransactionStore: {
        moveRows(input: typeof transactionalMove) {
          transactionalMove = input;
          return {
            movedRowIds: input!.rows.map((row) => row.id),
            targetCircuitId: input!.targetCircuitId!,
          };
        },
      } as never,
      circuitRepository: {
        async findById(circuitId: string) {
          if (circuitId === "c1") {
            return { id: "c1", sectionId: "s1", circuitListId: "l1", equipmentIdentifier: "-1F1", sortOrder: 10, isReserve: 0 } as never;
          }
          if (circuitId === "c2") {
            return { id: "c2", sectionId: "s1", circuitListId: "l1", equipmentIdentifier: "-1F2", sortOrder: 20, isReserve: 0 } as never;
          }
          return { id: "c3", sectionId: "s1", circuitListId: "l1", equipmentIdentifier: "-1F3", sortOrder: 30, isReserve: 1 } as never;
        },
      } as never,
    });

    const result = await service.moveDeviceRowsBulk({ rowIds: ["r1", "r2"], targetCircuitId: "c3" });
    assert.deepEqual(transactionalMove, {
      rows: [
        { id: "r1", expectedCircuitId: "c1" },
        { id: "r2", expectedCircuitId: "c2" },
      ],
      targetCircuitId: "c3",
      createTargetCircuit: undefined,
    });
    assert.deepEqual(result, {
      movedRowIds: ["r1", "r2"],
      targetCircuitId: "c3",
    });
  });

  it("moving multiple device rows to placeholder creates exactly one new circuit", async () => {
    let transactionCount = 0;
    let preparedTarget:
      | {
          circuitListId: string;
          sectionId: string;
          equipmentIdentifier: string;
          displayName: string;
          sortOrder: number;
        }
      | undefined;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById(rowId: string) {
          return { id: rowId, circuitId: rowId === "r1" ? "c1" : "c2" } as never;
        },
      } as never,
      deviceRowTransactionStore: {
        moveRows(input: { rows: Array<{ id: string }>; createTargetCircuit?: typeof preparedTarget }) {
          transactionCount += 1;
          preparedTarget = input.createTargetCircuit;
          return {
            movedRowIds: input.rows.map((row) => row.id),
            targetCircuitId: "c-new",
            createdCircuitId: "c-new",
          };
        },
      } as never,
      circuitRepository: {
        async findById(circuitId: string) {
          if (circuitId === "c1" || circuitId === "c2") {
            return { id: circuitId, sectionId: "s1", circuitListId: "l1", equipmentIdentifier: "-1F1", sortOrder: 10, isReserve: 0 } as never;
          }
          return null as never;
        },
        async listBySection() {
          return [{ sortOrder: 30 }] as never[];
        },
      } as never,
      circuitSectionRepository: {
        async findById() {
          return { id: "s2", circuitListId: "l1", prefix: "-2F" } as never;
        },
      } as never,
      numberingService: {
        async getNextIdentifier() {
          return "-2F8";
        },
      } as never,
    });

    const result = await service.moveDeviceRowsBulk({
      rowIds: ["r1", "r2"],
      targetSectionId: "s2",
      createNewCircuit: true,
    });
    assert.equal(transactionCount, 1);
    assert.deepEqual(preparedTarget, {
      circuitListId: "l1",
      sectionId: "s2",
      equipmentIdentifier: "-2F8",
      displayName: "Neuer Stromkreis",
      sortOrder: 40,
    });
    assert.equal(result.createdCircuitId, "c-new");
  });

  it("reorders circuits inside one section without renumbering identifiers", async () => {
    let safeReorder: { sectionId: string; circuitIds: string[] } | undefined;
    const service = new CircuitWriteService({
      circuitSectionRepository: {
        async findById() {
          return { id: "s1", circuitListId: "l1" } as never;
        },
      } as never,
      circuitRepository: {
        async listBySection() {
          return [
            { id: "c1", sectionId: "s1", equipmentIdentifier: "-2F7", sortOrder: 10, isReserve: 0 },
            { id: "c2", sectionId: "s1", equipmentIdentifier: "-2F9", sortOrder: 20, isReserve: 0 },
            { id: "c3", sectionId: "s1", equipmentIdentifier: "-2F5", sortOrder: 30, isReserve: 1 },
          ] as never[];
        },
      } as never,
      circuitSectionTransactionStore: {
        updateSortOrders(sectionId: string, circuitIds: string[]) {
          safeReorder = { sectionId, circuitIds };
        },
      } as never,
    });

    await service.reorderCircuitsInSection("s1", { orderedCircuitIds: ["c3", "c1", "c2"] });
    assert.deepEqual(safeReorder, {
      sectionId: "s1",
      circuitIds: ["c3", "c1", "c2"],
    });
  });

  it("safe section identifier bulk update validates full section set (undo safety)", async () => {
    let safeCalled = false;
    const service = new CircuitWriteService({
      circuitSectionRepository: {
        async findById() {
          return { id: "s1", circuitListId: "l1", prefix: "-1F" } as never;
        },
      } as never,
      circuitRepository: {
        async listBySection() {
          return [
            { id: "c1", sectionId: "s1", equipmentIdentifier: "-1F1", sortOrder: 10, isReserve: 0 },
            { id: "c2", sectionId: "s1", equipmentIdentifier: "-1F2", sortOrder: 20, isReserve: 0 },
          ] as never[];
        },
      } as never,
      circuitSectionTransactionStore: {
        updateEquipmentIdentifiers() {
          safeCalled = true;
        },
      } as never,
    });
    await service.updateSectionEquipmentIdentifiers("s1", {
      identifiers: [
        { circuitId: "c1", equipmentIdentifier: "-1F2" },
        { circuitId: "c2", equipmentIdentifier: "-1F1" },
      ],
    });
    assert.equal(safeCalled, true);
  });

});