import assert from "node:assert/strict";
import { describe, it } from "node:test";
import {
  formatGroupedCircuitIdentifier,
  formatGroupRcdIdentifier,
  formatGroupUpstreamProtectionIdentifier,
  getNextCircuitGroupNumber,
  getNextGroupedCircuitIdentifier,
  parseGroupedEquipmentIdentifier,
} from "../src/domain/services/circuit-group-numbering.js";
import "./circuit-group-structure-project-command.repository.test.js";
import { createCircuitGroupRenumberPlan } from "../src/domain/services/circuit-group-renumbering.js";
import "./circuit-group-renumber-project-command.repository.test.js";
import { createCircuitGroupMovePlan } from "../src/domain/services/circuit-group-move-planning.js";
import "./circuit-group-move-project-command.repository.test.js";

describe("circuit group numbering", () => {
  it("formats the agreed identifiers including the leading hyphen", () => {
    assert.equal(
      formatGroupUpstreamProtectionIdentifier("lighting", 1),
      "-1F1.0"
    );
    assert.equal(formatGroupRcdIdentifier("lighting", 1), "-1Q1.0");
    assert.equal(
      formatGroupedCircuitIdentifier("lighting", 1, 2),
      "-1F1.2"
    );
    assert.equal(
      formatGroupedCircuitIdentifier("single_phase", 3, 7),
      "-2F3.7"
    );
    assert.equal(
      formatGroupedCircuitIdentifier("three_phase", 2, 1),
      "-3F2.1"
    );
  });

  it("parses circuit and group component identifiers", () => {
    assert.deepEqual(parseGroupedEquipmentIdentifier("-1F2.4"), {
      category: "lighting",
      groupNumber: 2,
      kind: "circuit",
      circuitNumber: 4,
    });
    assert.deepEqual(parseGroupedEquipmentIdentifier("-2F3.0"), {
      category: "single_phase",
      groupNumber: 3,
      kind: "group_upstream_protection",
      circuitNumber: null,
    });
    assert.deepEqual(parseGroupedEquipmentIdentifier("-3Q1.0"), {
      category: "three_phase",
      groupNumber: 1,
      kind: "group_rcd",
      circuitNumber: null,
    });
  });

  it("rejects legacy, malformed and unsupported identifiers", () => {
    for (const identifier of [
      "-1F1",
      "1F1.1",
      "-1Q1.2",
      "-4F1.1",
      "-1F0.1",
      "-1F1.01",
    ]) {
      assert.equal(parseGroupedEquipmentIdentifier(identifier), null);
    }
  });

  it("uses the highest target-group suffix plus one without filling gaps", () => {
    assert.equal(
      getNextGroupedCircuitIdentifier("lighting", 2, [
        "-1F2.1",
        "-1F2.3",
        "-1F2.7",
        "-1F1.12",
        "-2F2.9",
        "-1F2.0",
        "-1Q2.0",
        "-1F8",
      ]),
      "-1F2.8"
    );
  });

  it("uses the highest group number in the selected category plus one", () => {
    assert.equal(
      getNextCircuitGroupNumber("lighting", [
        { category: "lighting", groupNumber: 1 },
        { category: "lighting", groupNumber: 4 },
        { category: "single_phase", groupNumber: 9 },
      ]),
      5
    );
  });

  it("rejects non-positive group and circuit numbers", () => {
    assert.throws(
      () => formatGroupedCircuitIdentifier("lighting", 0, 1),
      RangeError
    );
    assert.throws(
      () => formatGroupedCircuitIdentifier("lighting", 1, 0),
      RangeError
    );
  });
});

describe("circuit group renumber planning", () => {
  const groups = [
    {
      id: "lighting-1",
      category: "lighting" as const,
      groupNumber: 1,
      prefix: "-1F1.",
      circuits: [
        { id: "circuit-1", equipmentIdentifier: "-1F1.1" },
        { id: "circuit-2", equipmentIdentifier: "-1F1.7" },
      ],
      components: [
        {
          id: "fuse-1",
          role: "group_upstream_protection" as const,
          equipmentIdentifier: "-1F1.0",
        },
        {
          id: "rcd-1",
          role: "group_residual_current_protection" as const,
          equipmentIdentifier: "-1Q1.0",
        },
      ],
    },
    {
      id: "lighting-2",
      category: "lighting" as const,
      groupNumber: 2,
      prefix: "-1F2.",
      circuits: [
        { id: "circuit-3", equipmentIdentifier: "-1F2.4" },
      ],
      components: [],
    },
    {
      id: "single-1",
      category: "single_phase" as const,
      groupNumber: 1,
      prefix: "-2F1.",
      circuits: [],
      components: [],
    },
  ];

  it("preserves circuit suffixes and maps optional group components", () => {
    const plan = createCircuitGroupRenumberPlan(groups, [
      { groupId: "lighting-1", targetGroupNumber: 3 },
    ]);
    assert.deepEqual(plan.groups[0], {
      groupId: "lighting-1",
      category: "lighting",
      expectedGroupNumber: 1,
      targetGroupNumber: 3,
      expectedPrefix: "-1F1.",
      targetPrefix: "-1F3.",
      circuits: [
        {
          circuitId: "circuit-1",
          expectedEquipmentIdentifier: "-1F1.1",
          targetEquipmentIdentifier: "-1F3.1",
        },
        {
          circuitId: "circuit-2",
          expectedEquipmentIdentifier: "-1F1.7",
          targetEquipmentIdentifier: "-1F3.7",
        },
      ],
      components: [
        {
          componentId: "fuse-1",
          expectedEquipmentIdentifier: "-1F1.0",
          targetEquipmentIdentifier: "-1F3.0",
        },
        {
          componentId: "rcd-1",
          expectedEquipmentIdentifier: "-1Q1.0",
          targetEquipmentIdentifier: "-1Q3.0",
        },
      ],
    });
  });

  it("allows a number swap when every affected group participates", () => {
    const plan = createCircuitGroupRenumberPlan(groups, [
      { groupId: "lighting-1", targetGroupNumber: 2 },
      { groupId: "lighting-2", targetGroupNumber: 1 },
    ]);
    assert.deepEqual(
      plan.groups.map((group) => [
        group.expectedGroupNumber,
        group.targetGroupNumber,
      ]),
      [
        [1, 2],
        [2, 1],
      ]
    );
  });

  it("rejects collisions, no-op requests and mismatched current BMKs", () => {
    assert.throws(
      () =>
        createCircuitGroupRenumberPlan(groups, [
          { groupId: "lighting-1", targetGroupNumber: 2 },
        ]),
      /unchanged group/
    );
    assert.throws(
      () =>
        createCircuitGroupRenumberPlan(groups, [
          { groupId: "lighting-1", targetGroupNumber: 1 },
        ]),
      /must change/
    );
    assert.throws(
      () =>
        createCircuitGroupRenumberPlan(
          [
            {
              ...groups[0],
              circuits: [
                {
                  id: "circuit-1",
                  equipmentIdentifier: "-1F9.1",
                },
              ],
            },
          ],
          [{ groupId: "lighting-1", targetGroupNumber: 3 }]
        ),
      /Circuit BMK does not match/
    );
  });
});

describe("circuit group move planning", () => {
  const sourceGroup = {
    id: "lighting-1",
    category: "lighting" as const,
    groupNumber: 1,
    prefix: "-1F1.",
  };
  const targetGroup = {
    id: "lighting-2",
    category: "lighting" as const,
    groupNumber: 2,
    prefix: "-1F2.",
  };

  it("uses the highest target suffix plus one and stores both positions", () => {
    assert.deepEqual(
      createCircuitGroupMovePlan({
        circuit: {
          id: "circuit-1",
          circuitListId: "list-1",
          sectionId: "lighting-1",
          equipmentIdentifier: "-1F1.7",
          sortOrder: 20,
        },
        sourceGroup,
        targetGroup,
        targetCircuitEquipmentIdentifiers: [
          "-1F2.1",
          "-1F2.4",
          "-1F2.9",
        ],
        targetSortOrder: 40,
      }),
      {
        circuitId: "circuit-1",
        circuitListId: "list-1",
        expectedSectionId: "lighting-1",
        targetSectionId: "lighting-2",
        expectedEquipmentIdentifier: "-1F1.7",
        targetEquipmentIdentifier: "-1F2.10",
        expectedSortOrder: 20,
        targetSortOrder: 40,
      }
    );
  });

  it("does not fill target gaps", () => {
    assert.equal(
      createCircuitGroupMovePlan({
        circuit: {
          id: "circuit-1",
          circuitListId: "list-1",
          sectionId: "lighting-1",
          equipmentIdentifier: "-1F1.2",
          sortOrder: 10,
        },
        sourceGroup,
        targetGroup,
        targetCircuitEquipmentIdentifiers: ["-1F2.1", "-1F2.3"],
        targetSortOrder: 20,
      }).targetEquipmentIdentifier,
      "-1F2.4"
    );
  });

  it("rejects cross-category, same-group and mismatched source moves", () => {
    const base = {
      circuit: {
        id: "circuit-1",
        circuitListId: "list-1",
        sectionId: "lighting-1",
        equipmentIdentifier: "-1F1.1",
        sortOrder: 10,
      },
      sourceGroup,
      targetGroup,
      targetCircuitEquipmentIdentifiers: [] as string[],
      targetSortOrder: 10,
    };
    assert.throws(
      () =>
        createCircuitGroupMovePlan({
          ...base,
          targetGroup: {
            id: "single-1",
            category: "single_phase",
            groupNumber: 1,
            prefix: "-2F1.",
          },
        }),
      /same category/
    );
    assert.throws(
      () =>
        createCircuitGroupMovePlan({
          ...base,
          targetGroup: sourceGroup,
        }),
      /different groups/
    );
    assert.throws(
      () =>
        createCircuitGroupMovePlan({
          ...base,
          circuit: {
            ...base.circuit,
            equipmentIdentifier: "-1F9.1",
          },
        }),
      /does not match/
    );
  });
});