import assert from "node:assert/strict";
import { test } from "vitest";

import type {
  PublicationAggregate,
  PublicPreview,
  ValidationReport,
  WorkingCopy,
  WorkingCopyDetail,
} from "../../../src/features/tech-log/contracts/studio/contract.ts";
import {
  deriveDocumentState,
  deriveNextAction,
  derivePreviewState,
  deriveValidationState,
} from "../../../src/features/tech-log/domain/studio/document-state.ts";
import {
  createLocalId,
  createNewItemId,
} from "../../../src/features/tech-log/domain/studio/local-id.ts";

const now = "2026-08-14T12:00:00.000Z";
const validUntil = "2026-08-14T12:30:00.000Z";
const expiredAt = "2026-08-14T12:00:00.000Z";
const futureExpiry = "2026-08-14T12:45:00.000Z";

function documentAt(
  version = 7,
  overrides: Partial<WorkingCopy> = {},
): WorkingCopy {
  return {
    id: "11111111-1111-4111-8111-111111111111",
    kind: "CASE",
    version,
    title: "Fetch Join 경계",
    slug: "fetch-join-boundary",
    summary: "목록 경계를 검증합니다.",
    topicId: "22222222-2222-4222-8222-222222222222",
    projectId: null,
    relations: [],
    updatedAt: now,
    problem: "문제",
    conclusion: "결론",
    environment: "PostgreSQL",
    reproduction: "재현",
    lastVerifiedOn: "2026-08-14",
    bodyMarkdown: "## 본문",
    ...overrides,
  } as WorkingCopy;
}

function validationAt(
  version = 7,
  overrides: Partial<ValidationReport> = {},
): ValidationReport {
  return {
    validationId: "33333333-3333-4333-8333-333333333333",
    documentId: "11111111-1111-4111-8111-111111111111",
    validatedVersion: version,
    status: "VALID",
    issues: [],
    validatedAt: "2026-08-14T11:50:00.000Z",
    validUntil,
    dependencyRevision: "catalog-1",
    ...overrides,
  };
}

function previewAt(
  version = 7,
  validationId = validationAt(version).validationId,
  overrides: Partial<PublicPreview> = {},
): PublicPreview {
  return {
    previewId: "44444444-4444-4444-8444-444444444444",
    documentId: "11111111-1111-4111-8111-111111111111",
    previewVersion: version,
    validationId,
    createdAt: "2026-08-14T11:55:00.000Z",
    expiresAt: futureExpiry,
    renderModel: {
      kind: "CASE",
      title: "Fetch Join 경계",
      slug: "fetch-join-boundary",
      summary: "목록 경계를 검증합니다.",
      topic: {
        id: "22222222-2222-4222-8222-222222222222",
        label: "JPA",
        publicPath: null,
      },
      project: null,
      relations: [],
      blocks: [],
    },
    ...overrides,
  } as PublicPreview;
}

function publishedAt(version = 7): PublicationAggregate {
  return {
    publicationId: "55555555-5555-4555-8555-555555555555",
    documentId: "11111111-1111-4111-8111-111111111111",
    status: "PUBLISHED",
    publishedVersion: version,
    publicationRevision: 1,
    latestEventId: "66666666-6666-4666-8666-666666666666",
    publicPath: "/cases/fetch-join-boundary",
    updatedAt: now,
  };
}

type InputOverrides = Partial<Parameters<typeof deriveNextAction>[0]>;

function input(overrides: InputOverrides = {}) {
  return {
    document: documentAt(),
    validation: validationAt(),
    preview: previewAt(),
    publication: null,
    now,
    dependencyRevision: "catalog-1",
    ...overrides,
  };
}

test("same published version is NONE before stale validation checks", () => {
  assert.equal(
    deriveNextAction({
      document: documentAt(7),
      validation: validationAt(7, { validUntil: expiredAt }),
      preview: previewAt(7, "other-validation", { expiresAt: expiredAt }),
      publication: publishedAt(7),
      now,
      dependencyRevision: "catalog-2",
    }),
    "NONE",
  );
});

test("validation freshness requires the saved version, a future expiry, and matching dependencies", () => {
  assert.deepEqual(deriveValidationState(input({ validation: null })), {
    result: "NOT_RUN",
    freshness: "NONE",
  });
  assert.deepEqual(
    deriveValidationState(input({ validation: validationAt(6) })),
    { result: "VALID", freshness: "STALE" },
  );
  assert.deepEqual(
    deriveValidationState(
      input({ validation: validationAt(7, { validUntil: now }) }),
    ),
    { result: "VALID", freshness: "STALE" },
  );
  assert.deepEqual(
    deriveValidationState(input({ dependencyRevision: "catalog-2" })),
    { result: "VALID", freshness: "STALE" },
  );
  assert.deepEqual(deriveValidationState(input()), {
    result: "VALID",
    freshness: "CURRENT",
  });
});

test("preview expiry takes precedence and all remaining freshness checks are enforced", () => {
  const validation = validationAt();
  assert.equal(derivePreviewState(input({ preview: null })), "NONE");
  assert.equal(
    derivePreviewState(
      input({ preview: previewAt(6, validation.validationId) }),
    ),
    "STALE",
  );
  assert.equal(
    derivePreviewState(input({ preview: previewAt(7, "other-validation") })),
    "STALE",
  );
  assert.equal(
    derivePreviewState(
      input({
        preview: previewAt(6, "other-validation", { expiresAt: now }),
      }),
    ),
    "EXPIRED",
  );
  assert.equal(derivePreviewState(input()), "CURRENT");
  assert.equal(
    derivePreviewState(
      input({ validation: validationAt(7, { validUntil: now }) }),
    ),
    "STALE",
  );
  assert.equal(
    derivePreviewState(input({ dependencyRevision: "catalog-2" })),
    "STALE",
  );
});

test("save-reset, dependency staleness, invalid reports, warnings and preview gaps are ordered", () => {
  assert.equal(
    deriveNextAction(
      input({ document: documentAt(7, { title: "", slug: "", summary: "" }) }),
    ),
    "CONTINUE_EDITING",
  );
  assert.equal(deriveNextAction(input({ validation: null })), "VALIDATE");
  assert.equal(
    deriveNextAction(input({ dependencyRevision: "catalog-2" })),
    "VALIDATE",
  );
  assert.equal(
    deriveNextAction(
      input({ validation: validationAt(7, { status: "INVALID" }) }),
    ),
    "FIX_VALIDATION",
  );
  assert.equal(
    deriveNextAction(
      input({
        validation: validationAt(7, { status: "WARNINGS" }),
        preview: null,
      }),
    ),
    "CREATE_PREVIEW",
  );
  assert.equal(
    deriveNextAction(
      input({ validation: validationAt(7, { status: "WARNINGS" }) }),
    ),
    "PUBLISH",
  );
  assert.deepEqual(
    deriveValidationState(
      input({
        validation: validationAt(7, { status: "WARNINGS" }),
        dependencyRevision: "catalog-2",
      }),
    ),
    { result: "WARNINGS", freshness: "STALE" },
  );
  assert.equal(
    deriveNextAction(
      input({
        validation: validationAt(7, { status: "WARNINGS" }),
        dependencyRevision: "catalog-2",
      }),
    ),
    "VALIDATE",
  );
});

test("saving retains an old preview as stale and returns to validation", () => {
  const previousValidation = validationAt(7);
  const previousPreview = previewAt(7, previousValidation.validationId);
  const state = deriveDocumentState(
    input({
      document: documentAt(8),
      validation: null,
      preview: previousPreview,
    }),
  );

  assert.deepEqual(state.validation, {
    result: "NOT_RUN",
    freshness: "NONE",
  });
  assert.equal(state.preview, "STALE");
  assert.equal(state.nextAction, "VALIDATE");
});

test("unpublished or old-version publications follow the normal next-action flow", () => {
  assert.equal(
    deriveNextAction(
      input({ publication: { ...publishedAt(), status: "UNPUBLISHED" } }),
    ),
    "PUBLISH",
  );
  assert.equal(
    deriveNextAction(input({ publication: publishedAt(6) })),
    "PUBLISH",
  );
});

test("deriveDocumentState is consistent with a WorkingCopyDetail aggregate", () => {
  const detail: WorkingCopyDetail = {
    document: documentAt(),
    currentValidation: validationAt(),
    latestPreview: previewAt(),
    currentPublication: publishedAt(),
    dependencyRevision: "catalog-1",
    // `deriveDocumentState` computes `nextAction`; it never reads it back off
    // `WorkingCopyDetail`. This mirrors the expected `explicit` result below.
    nextAction: "NONE",
  };
  const explicit = deriveDocumentState({
    document: detail.document,
    validation: detail.currentValidation,
    preview: detail.latestPreview,
    publication: detail.currentPublication,
    dependencyRevision: detail.dependencyRevision,
    now,
  });
  const fromDetail = deriveDocumentState({ ...detail, now });

  assert.deepEqual(explicit, {
    validation: { result: "VALID", freshness: "CURRENT" },
    preview: "CURRENT",
    nextAction: "NONE",
  });
  assert.deepEqual(fromDetail, explicit);
});

test("local Studio IDs are deterministic without Web Crypto and prefer UUIDs when present", () => {
  assert.equal(
    createLocalId("preview", null, () => 1234, () => 0.25),
    "preview-1234-250000000",
  );
  assert.equal(
    createLocalId("save", { randomUUID: () => "fixture-uuid" }),
    "save-fixture-uuid",
  );
});

/*
  이 두 함수가 나뉜 이유는 하나는 화면 안에만 머물고 다른 하나는 계약을 건너가기 때문이다.

  한때 새 관계·규칙·선택지의 id 를 `createLocalId` 로 만들었고, 그래서 `relation-<uuid>` 같은
  값이 요청 본문에 실렸다. 계약은 그 자리에 uuid 를 요구하므로 서버는 파싱조차 못 하고 400 을
  돌려주었다 — 편집기에는 "saveStudioDocument broke its contract." 한 줄만 남고 저장은 통째로
  실패했다. 목록에 고를 대상이 하나도 없던 시절에는 아무도 이 경로를 지나지 않아 드러나지 않았다.
*/
const UUID_SHAPE = /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/;

test("new list item IDs are bare UUIDs, because they cross the contract", () => {
  assert.equal(
    createNewItemId({ randomUUID: () => "3f1a2b4c-5d6e-4f70-8a91-b2c3d4e5f607" }),
    "3f1a2b4c-5d6e-4f70-8a91-b2c3d4e5f607",
  );
  // Web Crypto 가 없는 환경에서도 형식은 uuid 여야 한다 — 값은 서버가 새로 부여하지만, 형식이
  // 어긋나면 요청 자체가 거절된다.
  assert.match(createNewItemId(null, () => 0.5), UUID_SHAPE);
  assert.match(createNewItemId(null, () => 0), UUID_SHAPE);
  assert.match(createNewItemId(null, () => 0.999), UUID_SHAPE);
});

test("prefixed local IDs never satisfy the contract's UUID shape", () => {
  assert.equal(
    UUID_SHAPE.test(createLocalId("relation", { randomUUID: () => "3f1a2b4c-5d6e-4f70-8a91-b2c3d4e5f607" })),
    false,
  );
});