import assert from "node:assert/strict";
import { describe, it } from "node:test";
import {
  buildFeederCircuitSnapshot,
  getDefaultFeederCircuitSection,
  getNextFeederCircuitIdentifier,
} from "../src/frontend/utils/distribution-board-feeder-circuit.js";
import type { CircuitTreeResponseDto } from "../src/frontend/types.js";
import { createFeederCircuitAndUpdateDistributionBoard } from "../src/frontend/utils/api.js";

function tree(): CircuitTreeResponseDto {
  return {
    circuitListId: "list-main",
    distributionBoardId: "board-main",
    distributionBoardName: "NSHV",
    currentRevision: 2,
    singlePhaseVoltageV: 230,
    threePhaseVoltageV: 400,
    distributionBoardSimultaneityFactor: 1,
    distributionBoardTotalPower: 0,
    distributionBoardTotalPowerWithSimultaneityFactor: 0,
    headerComponents: [],
    footerComponents: [],
    sections: [
      {
        id: "single",
        key: "single_phase",
        category: "single_phase",
        groupNumber: 1,
        displayName: "1-phasig 1",
        prefix: "-2F1.",
        sortOrder: 10,
        sectionTotalPower: 0,
        components: [],
        circuits: [],
      },
      {
        id: "three",
        key: "three_phase",
        category: "three_phase",
        groupNumber: 1,
        displayName: "3-phasig 1",
        prefix: "-3F1.",
        sortOrder: 20,
        sectionTotalPower: 0,
        components: [],
        circuits: [
          {
            id: "existing-2",
            circuitListId: "list-main",
            sectionId: "three",
            equipmentIdentifier: "-3F1.2",
            sortOrder: 10,
            isReserve: true,
            circuitTotalPower: 0,
            circuitApparentPower: 0,
            circuitCosPhi: 1,
            deviceRows: [],
            downstreamBoardLoads: [],
          },
          {
            id: "existing-5",
            circuitListId: "list-main",
            sectionId: "three",
            equipmentIdentifier: "-3F1.5",
            sortOrder: 30,
            isReserve: true,
            circuitTotalPower: 0,
            circuitApparentPower: 0,
            circuitCosPhi: 1,
            deviceRows: [],
            downstreamBoardLoads: [],
          },
        ],
      },
    ],
  };
}

describe("distribution-board feeder circuit planning", () => {
  it("prefers a three-phase section and does not fill BMK gaps", () => {
    const input = tree();
    const section = getDefaultFeederCircuitSection(input)!;
    assert.equal(section.id, "three");
    assert.equal(getNextFeederCircuitIdentifier(section), "-3F1.6");
  });

  it("builds an empty circuit with stable id, optional name and defaults", () => {
    const input = tree();
    const snapshot = buildFeederCircuitSnapshot({
      id: "new-feeder",
      tree: input,
      sectionId: "three",
      displayName: "  ",
    });
    assert.equal(snapshot.id, "new-feeder");
    assert.equal(snapshot.equipmentIdentifier, "-3F1.6");
    assert.equal(snapshot.displayName, null);
    assert.equal(snapshot.sortOrder, 40);
    assert.equal(snapshot.voltage, 400);
    assert.equal(snapshot.isReserve, true);
    assert.deepEqual(snapshot.deviceRows, []);
    assert.equal(snapshot.protectionDevice, null);
  });

  it("sends circuit creation and board linking as one project command", async () => {
    const input = tree();
    const circuit = buildFeederCircuitSnapshot({
      id: "new-feeder",
      tree: input,
      sectionId: "three",
      displayName: "",
    });
    type FeederCommandBody = {
      expectedRevision: number;
      command: {
        type: string;
        payload: {
          circuit: { id: string };
          boardUpdate: { payload: { changes: Array<{ field: string; value: unknown }> } };
        };
      };
    };
    const requests: Array<{ url: string; method: string; body: FeederCommandBody }> = [];
    const originalFetch = globalThis.fetch;
    globalThis.fetch = async (request, init) => {
      requests.push({
        url: String(request),
        method: init?.method ?? "GET",
        body: JSON.parse(String(init?.body)),
      });
      return new Response(JSON.stringify({}), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      });
    };
    try {
      await createFeederCircuitAndUpdateDistributionBoard(
        "project-1",
        "board-child",
        {
          floorId: null,
          supplyType: "AV",
          simultaneityFactor: 0.8,
          feedingDistributionBoardId: "board-main",
          feedingCircuitId: circuit.id,
        },
        circuit,
        7
      );
    } finally {
      globalThis.fetch = originalFetch;
    }
    assert.equal(requests.length, 1);
    assert.equal(requests[0].url, "/api/projects/project-1/commands");
    assert.equal(requests[0].method, "POST");
    assert.equal(requests[0].body.expectedRevision, 7);
    assert.equal(
      requests[0].body.command.type,
      "distribution-board.create-feeder-circuit"
    );
    assert.equal(requests[0].body.command.payload.circuit.id, "new-feeder");
    assert.deepEqual(
      requests[0].body.command.payload.boardUpdate.payload.changes
        .filter((change: { field: string }) =>
          change.field.startsWith("feeding")
        )
        .map((change: { field: string; value: unknown }) => [
          change.field,
          change.value,
        ]),
      [
        ["feedingDistributionBoardId", "board-main"],
        ["feedingCircuitId", "new-feeder"],
      ]
    );
  });
});