import { describe, expect, it } from "vitest";
import { createProject } from "../src/domain/project";
import type { PhyFile, KeyNode, VariantGroupNode } from "../src/domain/phy";
import { generateMockTarget } from "../src/domain/generator";
import { validateProject } from "../src/domain/validate";
import { assignKey, type MapFile } from "../src/domain/map";
import { setKeyWiring, setProvider, type ContactWiring, type ElcFile } from "../src/domain/elc";
import { listDeleteReferences, deleteNodeCascade } from "../src/domain/deleteCascade";
import { loadProject, saveProject } from "../src/io/projectFile";
import { makePhyReference } from "../src/domain/phyReference";
import { ProjectHistory } from "../src/domain/history";

const emptyPhy = (): PhyFile => ({
  version: "0.1.0",
  metadata: {},
  profiles: [{ id: "d", name: "D", unitSize: { x: 1, y: 1 } }],
  root: [],
});
const key = (id: string, decal = false): KeyNode => ({
  type: "key",
  id,
  profile: "d",
  transform: { x: 0, y: 0, rotation: 0 },
  size: { w: 1, h: 1 },
  ...(decal ? { decal: true } : {}),
});
const variantGroup = (
  id: string,
  defaultId: string,
  variants: Array<[string, string, (KeyNode | VariantGroupNode)[]]>,
): VariantGroupNode => ({
  type: "variantGroup",
  id,
  name: id,
  transform: { x: 0, y: 0, rotation: 0 },
  default: defaultId,
  children: variants.map(([variantId, name, children]) => ({
    type: "variant",
    id: variantId,
    name,
    children,
  })),
});

describe("review regressions", () => {
  it("keeps sibling Variant references when deleting a Variant and moves the selection", async () => {
    const phy = emptyPhy();
    phy.root = [
      variantGroup("vg", "va", [
        ["va", "A", [key("ka")]],
        ["vb", "B", [key("kb")]],
        ["vc", "C", [key("kc")]],
      ]),
    ];
    const p = await createProject(phy);
    p.idx.order = ["ka", "kb", "kc"];
    p.output.variantSelection = { vg: "va" };
    p.elc.keys = ["ka", "kb", "kc"].map((id) => ({
      key: id,
      detect: "contact",
      terminals: { a: "VCC", b: "GND" },
    }));
    p.elc.ledChains = [{ id: "chain", data: "VCC", order: ["ka", "kb", "kc"] }];
    p.map.layers[0]!.keymap = ["ka", "kb", "kc"].map((keyId) => ({ keyId, keycode: "KC_A" }));
    expect(listDeleteReferences(p, "va").map((ref) => ref.id)).toEqual(["ka", "ka", "ka", "ka"]);
    const result = deleteNodeCascade(p, "va");
    expect(
      result.phy.root[0]!.type === "variantGroup" && result.phy.root[0]!.children.map((v) => v.id),
    ).toEqual(["vb", "vc"]);
    expect(result.phy.root[0]!.type === "variantGroup" && result.phy.root[0]!.default).toBe("vb");
    expect(result.output.variantSelection.vg).toBe("vb");
    expect(result.idx.order).toEqual(["kb", "kc"]);
    expect(result.elc.keys.map((w) => w.key)).toEqual(["kb", "kc"]);
    expect(result.elc.ledChains?.[0]?.order).toEqual(["kb", "kc"]);
    expect(result.map.layers[0]!.keymap.map((assignment) => assignment.keyId)).toEqual(["kb", "kc"]);
  });

  it("returns schema issues without running semantic validation on malformed input", async () => {
    const p = await createProject(emptyPhy());
    const badOutput = await loadProject(JSON.stringify({ ...p, output: {} }));
    expect(badOutput.errors.some((issue) => issue.path === "/output/variantSelection")).toBe(true);
    expect(badOutput.errors.some((issue) => issue.code === "positive-unit-size")).toBe(false);
    const badPhy = await loadProject(
      JSON.stringify({ ...p, phy: { version: "0.1.0", profiles: null, root: [] } }),
    );
    expect(badPhy.errors.every((issue) => issue.code === "schema")).toBe(true);
    expect(badPhy.errors.length).toBeGreaterThan(0);
    const blockedSave = await saveProject({ ...p, phy: { ...p.phy, profiles: [] } });
    expect(blockedSave.json).toBeUndefined();
    expect(blockedSave.errors.some((issue) => issue.severity === "blocksSave")).toBe(true);
    const semanticBlock = await saveProject({
      ...p,
      phy: { ...p.phy, profiles: [{ ...p.phy.profiles[0]!, unitSize: { x: 0, y: 1 } }] },
    });
    expect(semanticBlock.json).toBeUndefined();
    expect(semanticBlock.errors.some((issue) => issue.code === "positive-unit-size")).toBe(true);
  });

  it("rejects unsupported project versions and allows other blocksSave projects to load", async () => {
    const p = await createProject(emptyPhy());
    const unsupported = await loadProject(JSON.stringify({ ...p, version: "0.2.0" }));
    expect(unsupported.project).toBeUndefined();
    expect(unsupported.errors.some((x) => x.code === "version")).toBe(true);
    p.idx.order = ["missing"];
    const blocked = await loadProject(JSON.stringify(p));
    expect(blocked.project).toBeDefined();
    expect(blocked.errors.some((x) => x.severity === "blocksSave")).toBe(true);
  });

  it("blocks saving duplicate IDX keys", async () => {
    const phy = emptyPhy();
    phy.root = [key("k")];
    const p = await createProject(phy);
    p.idx.order = ["k", "k"];
    expect(validateProject(p).some((x) => x.code === "schema" && x.severity === "blocksSave")).toBe(true);
    const result = await saveProject(p);
    expect(result.json).toBeUndefined();
    expect(result.errors.some((x) => x.code === "schema")).toBe(true);
  });

  it("does not retain a no-op grouped history entry", async () => {
    const p = await createProject(emptyPhy());
    const history = new ProjectHistory(p);
    history.begin();
    history.commit(p);
    expect(history.canUndo).toBe(false);
    const changed = { ...p, projectId: "changed" };
    history.begin();
    history.commit(changed);
    expect(history.canUndo).toBe(true);
    expect(history.undo().projectId).toBe(p.projectId);
  });

  it("ignores decals when requiring index registration, wiring, and keymap assignments", async () => {
    const phy = emptyPhy();
    phy.root = [key("decal", true)];
    const p = await createProject(phy);
    const relevant = validateProject(p).filter((issue) => issue.ids?.includes("decal"));
    expect(
      relevant.filter((issue) => ["idx-unregistered", "unwired-key", "unassigned-key"].includes(issue.code)),
    ).toEqual([]);
  });

  it("preserves extension fields while editing existing MAP and ELC entries", async () => {
    const p = await createProject(emptyPhy());
    const map = p.map as MapFile;
    map.layers[0]!.keymap = [{ keyId: "k", keycode: "KC_A", vendorAssignment: { keep: true } }];
    const editedMap = assignKey(map, "Base", "k", "KC_B");
    expect(editedMap.layers[0]!.keymap[0]).toEqual({
      keyId: "k",
      keycode: "KC_B",
      vendorAssignment: { keep: true },
    });
    expect(() => assignKey(map, "Base", "k", "VENDOR_ACTION")).toThrow();
    expect(() => assignKey(map, "Base", "k", "MO(Missing)")).toThrow();

    const elc = p.elc as ElcFile;
    elc.providers = [{ id: "m", kind: "mcu", part: "RP2040", vendorProvider: 9 }];
    const editedProvider = setProvider(elc, { id: "m", kind: "mcu", part: "RP2040B" });
    expect(editedProvider.providers[0]).toMatchObject({ part: "RP2040B", vendorProvider: 9 });
    elc.keys = [
      {
        key: "k",
        detect: "contact",
        terminals: { a: "m.GP0", b: "m.GP1", vendorTerminal: "x" },
        vendorWiring: true,
      } as ContactWiring,
    ];
    const editedElc = setKeyWiring(elc, {
      key: "k",
      detect: "contact",
      terminals: { a: "m.GP2", b: "m.GP3" },
    });
    expect(editedElc.keys[0]).toMatchObject({
      vendorWiring: true,
      terminals: { a: "m.GP2", b: "m.GP3", vendorTerminal: "x" },
    });
  });

  it("validates pin ownership, provider pin ranges, duplicate ELC IDs and MAP layer references", async () => {
    const phy = emptyPhy();
    phy.root = [key("k")];
    const p = await createProject(phy);
    p.elc.providers = [
      { id: "m", kind: "mcu", part: "RP2040" },
      { id: "m", kind: "mcu", part: "RP2040" },
      { id: "mux", kind: "analog-mux", channels: 2, select: ["missing.X"], common: "m.GP30" },
    ];
    p.elc.keys = [
      { key: "k", detect: "contact", terminals: { a: "mux.2", b: "missing.P" } },
      { key: "k", detect: "contact", terminals: { a: "VCC", b: "GND" } },
    ];
    p.elc.ledChains = [
      { id: "chain", data: "m.GP0", order: [] },
      { id: "chain", data: "m.GP1", order: [] },
    ];
    p.map.layers[0]!.keymap = [{ keyId: "k", keycode: "MO(Missing)" }];
    const codes = new Set(validateProject(p).map((issue) => issue.code));
    for (const code of [
      "duplicate-provider-id",
      "duplicate-key-wiring",
      "duplicate-led-chain-id",
      "missing-pin-provider",
      "unknown-provider-pin",
      "missing-map-layer-reference",
    ])
      expect(codes.has(code), code).toBe(true);
    const unknownPart = validateProject({
      ...p,
      elc: {
        ...p.elc,
        providers: [{ id: "custom", kind: "mcu", part: "UnknownPart" }],
        keys: [{ key: "k", detect: "contact", terminals: { a: "custom.any_pin", b: "VCC" } }],
        ledChains: [],
      },
    });
    expect(unknownPart.some((issue) => issue.code === "unknown-provider-pin")).toBe(false);
    expect(() => setProvider(p.elc, { id: "bad.id", kind: "mcu", part: "RP2040" })).toThrow();
  });

  it("selects nested variants and treats sibling alternatives as exclusive", async () => {
    const phy = emptyPhy();
    phy.root = [
      variantGroup("outer", "outer-a", [
        [
          "outer-a",
          "A",
          [
            key("common"),
            variantGroup("inner", "inner-a", [
              ["inner-a", "IA", [key("ia")]],
              ["inner-b", "IB", [key("ib")]],
            ]),
          ],
        ],
        ["outer-b", "B", [key("other")]],
      ]),
    ];
    const p = await createProject(phy);
    p.idx.order = ["common", "ia", "ib", "other"];
    p.output.variantSelection = { outer: "outer-a", inner: "inner-b" };
    p.elc.providers = [{ id: "m", kind: "mcu", part: "RP2040" }];
    p.output.matrix = { rowPins: ["m.GP0", "m.GP2"], colPins: ["m.GP1", "m.GP3"] };
    p.elc.keys = ["common", "ia", "ib", "other"].map((id) => ({
      key: id,
      detect: "contact",
      terminals: id === "common" || id === "other" ? { a: "m.GP2", b: "m.GP3" } : { a: "m.GP0", b: "m.GP1" },
      diode: "b-to-a",
    }));
    p.map.layers[0]!.keymap = ["common", "ia", "ib", "other"].map((keyId) => ({ keyId, keycode: "KC_A" }));
    expect(validateProject(p).some((issue) => issue.code === "wiring-collision")).toBe(false);
    const generated = generateMockTarget(p);
    expect(generated.target?.idx).toEqual(["common", "ib"]);
    expect(p.idx.order).toEqual(["common", "ia", "ib", "other"]);
  });

  it("uses the independently calculated JCS checksum and reports stale references", async () => {
    const phy = emptyPhy();
    expect(await makePhyReference(phy)).toEqual({
      source: "project:phy",
      checksum: "sha256-jcs:277e45f2cae4b3883480599c5569e73fbeec9e1a22bfb9bc323aecc4cb91d843",
    });
    const p = await createProject(phy);
    p.phy.metadata.name = "changed after reference creation";
    const loaded = await loadProject(JSON.stringify(p));
    expect(
      loaded.errors.filter((issue) => issue.code === "phy-reference-mismatch").map((issue) => issue.path),
    ).toEqual(["/idx/phyReference", "/elc/phyReference", "/map/phyReference"]);
  });
});