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

describe("circuit write service rules", () => {
  it("rejects duplicate equipment identifiers in same circuit list", async () => {
    const service = new CircuitWriteService({
      circuitListRepository: {
        async findById() {
          return { id: "list1", projectId: "p1" } as never;
        },
      } as never,
      circuitSectionRepository: {
        async findById() {
          return { id: "sec1", circuitListId: "list1" } as never;
        },
      } as never,
      circuitRepository: {
        async existsByEquipmentIdentifier() {
          return true;
        },
      } as never,
    });

    await assert.rejects(
      () =>
        service.createCircuit("p1", "list1", {
          sectionId: "sec1",
          equipmentIdentifier: "-2F1",
          sortOrder: 10,
        }),
      /Duplicate equipmentIdentifier/
    );
  });

  it("rejects section and list mismatch", async () => {
    const service = new CircuitWriteService({
      circuitListRepository: {
        async findById() {
          return { id: "list1", projectId: "p1" } as never;
        },
      } as never,
      circuitSectionRepository: {
        async findById() {
          return { id: "sec1", circuitListId: "other" } as never;
        },
      } as never,
      circuitRepository: {
        async existsByEquipmentIdentifier() {
          return false;
        },
      } as never,
    });

    await assert.rejects(
      () =>
        service.createCircuit("p1", "list1", {
          sectionId: "sec1",
          equipmentIdentifier: "-2F1",
          sortOrder: 10,
        }),
      /Section does not belong to circuit list/
    );
  });

  it("deleting last device row keeps circuit and sets reserve", async () => {
    let reserveFlag = false;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
        async delete() {
          return;
        },
        async countByCircuit() {
          return 0;
        },
      } as never,
      circuitRepository: {
        async findById() {
          return {
            id: "c1",
            sectionId: "s1",
            circuitListId: "l1",
            equipmentIdentifier: "-2F1",
            sortOrder: 10,
            isReserve: 0,
          } as never;
        },
        async update(_id: string, payload: { isReserve: boolean }) {
          reserveFlag = payload.isReserve;
        },
      } as never,
    });

    await service.deleteDeviceRow("r1");
    assert.equal(reserveFlag, true);
  });

  it("creating device row in reserve circuit clears reserve status", async () => {
    let reserveFlag = true;
    const service = new CircuitWriteService({
      circuitRepository: {
        async findById() {
          return {
            id: "c1",
            sectionId: "s1",
            circuitListId: "l1",
            equipmentIdentifier: "-2F1",
            sortOrder: 10,
            isReserve: 1,
          } as never;
        },
        async update(_id: string, payload: { isReserve: boolean }) {
          reserveFlag = payload.isReserve;
        },
      } as never,
      deviceRowRepository: {
        async countByCircuit() {
          return 0;
        },
        async create() {
          return "row1";
        },
        async findById() {
          return { id: "row1" } as never;
        },
      } as never,
      circuitListRepository: {} as never,
      circuitSectionRepository: {} as never,
      projectDeviceRepository: {
        async findById() {
          return { id: "pd1" } as never;
        },
      } as never,
    });

    await service.createDeviceRow("c1", {
      name: "Load",
      displayName: "Load",
      quantity: 1,
      powerPerUnit: 1,
      simultaneityFactor: 1,
    });
    assert.equal(reserveFlag, false);
  });

  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[];
        },
        async updateEquipmentIdentifiersSafely(_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[];
        },
        async updateEquipmentIdentifiersSafely(_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[];
        },
        async updateEquipmentIdentifiersSafely() {
          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 () => {
    const updatedReserve: Array<{ id: string; isReserve: boolean }> = [];
    const movedCalls: Array<{ rowId: string; targetCircuitId: string; sortOrder: number }> = [];
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
        async countByCircuit(circuitId: string) {
          if (circuitId === "c2") {
            return 2;
          }
          if (circuitId === "c1") {
            return 0;
          }
          return 0;
        },
        async moveToCircuit(rowId: string, targetCircuitId: string, sortOrder: number) {
          movedCalls.push({ rowId, targetCircuitId, sortOrder });
        },
      } 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;
        },
        async update(id: string, payload: { isReserve: boolean }) {
          updatedReserve.push({ id, isReserve: payload.isReserve });
        },
      } as never,
    });

    await service.moveDeviceRow("r1", { targetCircuitId: "c2" });
    assert.deepEqual(movedCalls, [{ rowId: "r1", targetCircuitId: "c2", sortOrder: 30 }]);
    assert.deepEqual(updatedReserve, [
      { id: "c1", isReserve: true },
      { id: "c2", isReserve: false },
    ]);
  });

  it("moving a device row to placeholder creates a new circuit in target section", async () => {
    let createdCircuitPayload: { sectionId: string; equipmentIdentifier: string; isReserve?: boolean } | null = null;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById() {
          return { id: "r1", circuitId: "c1" } as never;
        },
        async countByCircuit(circuitId: string) {
          if (circuitId === "c-new") {
            return 0;
          }
          return 1;
        },
        async moveToCircuit() {
          return;
        },
      } 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 === "c-new") {
            return {
              id: "c-new",
              sectionId: "s2",
              circuitListId: "l1",
              equipmentIdentifier: "-2F8",
              sortOrder: 50,
              isReserve: 0,
            } as never;
          }
          return null as never;
        },
        async listBySection() {
          return [{ sortOrder: 40 }] as never[];
        },
        async create(payload: { sectionId: string; equipmentIdentifier: string; isReserve?: boolean }) {
          createdCircuitPayload = payload;
          return "c-new";
        },
        async update() {
          return;
        },
      } 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.equal(createdCircuitPayload?.sectionId, "s2");
    assert.equal(createdCircuitPayload?.equipmentIdentifier, "-2F8");
    assert.equal(createdCircuitPayload?.isReserve, false);
  });

  it("moving multiple device rows to a circuit preserves input order and toggles reserve", async () => {
    const movedCalls: Array<{ rowId: string; targetCircuitId: string; sortOrder: number }> = [];
    const reserveUpdates: Array<{ id: string; isReserve: boolean }> = [];
    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;
        },
        async countByCircuit(circuitId: string) {
          if (circuitId === "c3") {
            return 1;
          }
          return 0;
        },
        async moveToCircuit(rowId: string, targetCircuitId: string, sortOrder: number) {
          movedCalls.push({ rowId, targetCircuitId, sortOrder });
        },
      } 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;
        },
        async update(id: string, payload: { isReserve: boolean }) {
          reserveUpdates.push({ id, isReserve: payload.isReserve });
        },
      } as never,
    });

    await service.moveDeviceRowsBulk({ rowIds: ["r1", "r2"], targetCircuitId: "c3" });
    assert.deepEqual(movedCalls, [
      { rowId: "r1", targetCircuitId: "c3", sortOrder: 20 },
      { rowId: "r2", targetCircuitId: "c3", sortOrder: 30 },
    ]);
    assert.deepEqual(reserveUpdates, [
      { id: "c1", isReserve: true },
      { id: "c2", isReserve: true },
      { id: "c3", isReserve: false },
    ]);
  });

  it("moving multiple device rows to placeholder creates exactly one new circuit", async () => {
    let createCount = 0;
    const service = new CircuitWriteService({
      deviceRowRepository: {
        async findById(rowId: string) {
          return { id: rowId, circuitId: rowId === "r1" ? "c1" : "c2" } as never;
        },
        async countByCircuit(circuitId: string) {
          if (circuitId === "c-new") {
            return 0;
          }
          return 1;
        },
        async moveToCircuit() {
          return;
        },
      } 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;
          }
          if (circuitId === "c-new") {
            return { id: "c-new", sectionId: "s2", circuitListId: "l1", equipmentIdentifier: "-2F8", sortOrder: 40, isReserve: 0 } as never;
          }
          return null as never;
        },
        async listBySection() {
          return [{ sortOrder: 30 }] as never[];
        },
        async create() {
          createCount += 1;
          return "c-new";
        },
        async update() {
          return;
        },
      } 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(createCount, 1);
    assert.equal(result.createdCircuitId, "c-new");
  });

  it("reorders circuits inside one section without renumbering identifiers", async () => {
    const updates: Array<{ id: string; sortOrder: number; equipmentIdentifier: string }> = [];
    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[];
        },
        async update(id: string, payload: { sortOrder: number; equipmentIdentifier: string }) {
          updates.push({ id, sortOrder: payload.sortOrder, equipmentIdentifier: payload.equipmentIdentifier });
        },
      } as never,
    });

    await service.reorderCircuitsInSection("s1", { orderedCircuitIds: ["c3", "c1", "c2"] });
    assert.deepEqual(updates, [
      { id: "c3", sortOrder: 10, equipmentIdentifier: "-2F5" },
      { id: "c1", sortOrder: 20, equipmentIdentifier: "-2F7" },
      { id: "c2", sortOrder: 30, equipmentIdentifier: "-2F9" },
    ]);
  });

  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[];
        },
        async updateEquipmentIdentifiersSafely() {
          safeCalled = true;
        },
      } as never,
    });
    await service.updateSectionEquipmentIdentifiers("s1", {
      identifiers: [
        { circuitId: "c1", equipmentIdentifier: "-1F2" },
        { circuitId: "c2", equipmentIdentifier: "-1F1" },
      ],
    });
    assert.equal(safeCalled, true);
  });

  it("safe identifier bulk update uses synchronous transaction callback", async () => {
    const repository = new CircuitRepository();
    const originalTransaction = (db as unknown as { transaction: unknown }).transaction;

    let callbackReturnedPromise = false;
    (db as unknown as { transaction: (cb: (tx: unknown) => unknown) => void }).transaction = (cb) => {
      const fakeTx = {
        select() {
          return {
            from() {
              return {
                where() {
                  return {
                    all() {
                      return [{ id: "c1" }, { id: "c2" }];
                    },
                  };
                },
              };
            },
          };
        },
        update() {
          return {
            set() {
              return {
                where() {
                  return {
                    run() {
                      return;
                    },
                  };
                },
              };
            },
          };
        },
      };
      const result = cb(fakeTx);
      callbackReturnedPromise = Boolean(result && typeof (result as Promise<unknown>).then === "function");
      if (callbackReturnedPromise) {
        throw new Error("Transaction function cannot return a promise");
      }
    };

    try {
      await repository.updateEquipmentIdentifiersSafely(
        "l1",
        [
          { id: "c1", equipmentIdentifier: "-1F1" },
          { id: "c2", equipmentIdentifier: "-1F2" },
        ],
        "s1"
      );
      assert.equal(callbackReturnedPromise, false);
    } finally {
      (db as unknown as { transaction: unknown }).transaction = originalTransaction;
    }
  });
});