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";
import "./circuit-group-subtree-snapshot.test.js";
import "./circuit-group-subtree-project-command.repository.test.js";
import {
  buildCircuitGroupMovePlan,
  buildCircuitGroupRenumberPlan,
  buildCircuitGroupReorderAssignments,
  buildCircuitGroupSubtreeSnapshot,
  buildNewCircuitGroupSnapshot,
  canMoveCircuitToGroup,
  canRenumberCircuitGroups,
  canDeleteCircuitGroup,
  renameCircuitGroupSnapshot,
  summarizeCircuitGroupSubtree,
} from "../src/frontend/utils/circuit-group-editing.js";

describe("circuit group numbering", () => {
  it("builds the next group without filling gaps or renumbering existing groups", () => {
    const sections = [
      groupSection("lighting-1", "lighting", 1, 10),
      groupSection("single-1", "single_phase", 1, 20),
      groupSection("lighting-3", "lighting", 3, 15),
    ];
    const snapshot = buildNewCircuitGroupSnapshot({
      id: "lighting-4",
      circuitListId: "list-1",
      category: "lighting",
      sections,
    });
    assert.deepEqual(snapshot, {
      id: "lighting-4",
      circuitListId: "list-1",
      key: "lighting_4",
      displayName: "Beleuchtung 4",
      prefix: "-1F4.",
      sortOrder: 17.5,
      category: "lighting",
      groupNumber: 4,
    });
    assert.equal(
      renameCircuitGroupSnapshot(snapshot, " Beleuchtung Nord ").displayName,
      "Beleuchtung Nord"
    );
    assert.equal(canDeleteCircuitGroup(sections[0]), true);
    assert.equal(
      canDeleteCircuitGroup({
        ...sections[0],
        components: [
          {
            id: "component-1",
            circuitListId: "list-1",
            sectionId: sections[0].id,
            equipmentIdentifier: "-1Q1.0",
            name: "Gruppen-FI",
            role: "group_residual_current_protection",
            placement: "group",
            sortOrder: 10,
          },
        ],
      }),
      false
    );
  });

  it("reorders complete group lists only between category peers", () => {
    const sections = [
      groupSection("lighting-1", "lighting", 1, 10),
      groupSection("lighting-2", "lighting", 2, 15),
      groupSection("single-1", "single_phase", 1, 20),
    ];
    assert.deepEqual(
      buildCircuitGroupReorderAssignments(
        sections,
        "lighting-1",
        1
      ),
      [
        {
          groupId: "lighting-1",
          expectedSortOrder: 10,
          targetSortOrder: 15,
        },
        {
          groupId: "lighting-2",
          expectedSortOrder: 15,
          targetSortOrder: 10,
        },
        {
          groupId: "single-1",
          expectedSortOrder: 20,
          targetSortOrder: 20,
        },
      ]
    );
    assert.equal(
      buildCircuitGroupReorderAssignments(
        sections,
        "lighting-1",
        -1
      ),
      null
    );
    assert.equal(
      buildCircuitGroupReorderAssignments(
        sections,
        "single-1",
        1
      ),
      null
    );
  });

  it("renumbers a complete category by group order and preserves circuit suffixes", () => {
    const sections = [
      {
        ...groupSection("lighting-3", "lighting", 3, 10),
        prefix: "-1F3.",
        circuits: [
          {
            id: "circuit-7",
            circuitListId: "list-1",
            sectionId: "lighting-3",
            equipmentIdentifier: "-1F3.7",
            sortOrder: 10,
            isReserve: false,
            circuitTotalPower: 0,
            deviceRows: [],
          },
        ],
        components: [
          {
            id: "rcd-3",
            circuitListId: "list-1",
            sectionId: "lighting-3",
            equipmentIdentifier: "-1Q3.0",
            name: "Gruppen-FI",
            role: "group_residual_current_protection" as const,
            placement: "group" as const,
            sortOrder: 10,
          },
        ],
      },
      {
        ...groupSection("lighting-1", "lighting", 1, 20),
        prefix: "-1F1.",
      },
      groupSection("single-1", "single_phase", 1, 30),
    ];

    assert.deepEqual(buildCircuitGroupRenumberPlan(sections, "lighting"), {
      groups: [
        {
          groupId: "lighting-3",
          category: "lighting",
          expectedGroupNumber: 3,
          targetGroupNumber: 1,
          expectedPrefix: "-1F3.",
          targetPrefix: "-1F1.",
          circuits: [
            {
              circuitId: "circuit-7",
              expectedEquipmentIdentifier: "-1F3.7",
              targetEquipmentIdentifier: "-1F1.7",
            },
          ],
          components: [
            {
              componentId: "rcd-3",
              expectedEquipmentIdentifier: "-1Q3.0",
              targetEquipmentIdentifier: "-1Q1.0",
            },
          ],
        },
        {
          groupId: "lighting-1",
          category: "lighting",
          expectedGroupNumber: 1,
          targetGroupNumber: 2,
          expectedPrefix: "-1F1.",
          targetPrefix: "-1F2.",
          circuits: [],
          components: [],
        },
      ],
    });
    assert.equal(
      buildCircuitGroupRenumberPlan(
        [
          groupSection("lighting-1", "lighting", 1, 10),
          groupSection("lighting-2", "lighting", 2, 20),
        ],
        "lighting"
      ),
      null
    );
    assert.equal(
      canRenumberCircuitGroups(sections, "lighting"),
      true
    );
    assert.equal(
      canRenumberCircuitGroups(
        [
          groupSection("lighting-1", "lighting", 1, 10),
          groupSection("lighting-2", "lighting", 2, 20),
        ],
        "lighting"
      ),
      false
    );
  });

  it("plans a same-category circuit drop with the next target BMK", () => {
    const source = {
      ...groupSection("lighting-1", "lighting", 1, 10),
      circuits: [
        {
          id: "circuit-source",
          circuitListId: "list-1",
          sectionId: "lighting-1",
          equipmentIdentifier: "-1F1.5",
          sortOrder: 10,
          isReserve: false,
          circuitTotalPower: 0,
          deviceRows: [],
        },
      ],
    };
    const target = {
      ...groupSection("lighting-2", "lighting", 2, 20),
      circuits: [
        {
          id: "circuit-target",
          circuitListId: "list-1",
          sectionId: "lighting-2",
          equipmentIdentifier: "-1F2.3",
          sortOrder: 20,
          isReserve: false,
          circuitTotalPower: 0,
          deviceRows: [],
        },
      ],
    };
    assert.equal(
      canMoveCircuitToGroup(
        [source, target],
        "circuit-source",
        "lighting-2"
      ),
      true
    );
    assert.deepEqual(
      buildCircuitGroupMovePlan({
        sections: [source, target],
        circuitId: "circuit-source",
        targetSectionId: "lighting-2",
        placement: {
          kind: "before",
          targetCircuitId: "circuit-target",
        },
      }),
      {
        circuitId: "circuit-source",
        circuitListId: "list-1",
        expectedSectionId: "lighting-1",
        targetSectionId: "lighting-2",
        expectedEquipmentIdentifier: "-1F1.5",
        targetEquipmentIdentifier: "-1F2.4",
        expectedSortOrder: 10,
        targetSortOrder: 10,
      }
    );
    assert.equal(
      canMoveCircuitToGroup(
        [
          source,
          groupSection("single-1", "single_phase", 1, 20),
        ],
        "circuit-source",
        "single-1"
      ),
      false
    );
  });

  it("captures a complete populated group for warned deletion", () => {
    const section = {
      ...groupSection("lighting-1", "lighting", 1, 10),
      components: [
        {
          id: "rcd-1",
          circuitListId: "list-1",
          sectionId: "lighting-1",
          equipmentIdentifier: "-1Q1.0",
          name: "Gruppen-FI",
          role: "group_residual_current_protection" as const,
          placement: "group" as const,
          sortOrder: 10,
          protectionDevice: {
            type: "FI" as const,
            ratedCurrentA: 40,
            rcdType: "A" as const,
            ratedResidualCurrentMa: 30,
          },
        },
      ],
      circuits: [
        {
          id: "circuit-1",
          circuitListId: "list-1",
          sectionId: "lighting-1",
          equipmentIdentifier: "-1F1.1",
          displayName: "Flurlicht",
          sortOrder: 10,
          voltage: 230,
          isReserve: false,
          circuitTotalPower: 0.1,
          protectionDevice: {
            type: "LS" as const,
            ratedCurrentA: 10,
            tripCharacteristic: "B" as const,
          },
          deviceRows: [
            {
              id: "row-1",
              linkedProjectDeviceId: "device-1",
              sortOrder: 10,
              name: "Leuchte",
              displayName: "Leuchte Flur",
              phaseType: "single_phase",
              quantity: 2,
              powerPerUnit: 0.05,
              simultaneityFactor: 1,
              cosPhi: 0.95,
              overriddenFields: "[\"displayName\"]",
              rowTotalPower: 0.1,
            },
          ],
        },
      ],
    };
    const snapshot = buildCircuitGroupSubtreeSnapshot(
      section,
      "list-1"
    );

    assert.deepEqual(summarizeCircuitGroupSubtree(snapshot), {
      circuitCount: 1,
      deviceRowCount: 1,
      protectionComponentCount: 1,
    });
    assert.equal(
      snapshot.circuits[0].circuit.deviceRows[0]
        .linkedProjectDeviceId,
      "device-1"
    );
    assert.equal(
      snapshot.circuits[0].circuit.deviceRows[0]
        .overriddenFields,
      "[\"displayName\"]"
    );
    assert.deepEqual(snapshot.circuits[0].protectionDevice, {
      circuitId: "circuit-1",
      type: "LS",
      ratedCurrentA: 10,
      fuseUtilizationCategory: null,
      tripCharacteristic: "B",
      rcdType: null,
      ratedResidualCurrentMa: null,
    });
  });

  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 outdated, 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
    );
  });
});

function groupSection(
  id: string,
  category: "lighting" | "single_phase" | "three_phase",
  groupNumber: number,
  sortOrder: number
) {
  return {
    id,
    key: id,
    displayName: id,
    prefix: `-${category === "lighting" ? 1 : category === "single_phase" ? 2 : 3}F${groupNumber}.`,
    sortOrder,
    category,
    groupNumber,
    sectionTotalPower: 0,
    components: [],
    circuits: [],
  };
}

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/
    );
  });
});