"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");
let CmapMarkdownExporter;

test.before(async () => {
  ({ CmapMarkdownExporter } = await import(
    "../static/cmap/model/markdown-exporter.js"));
});

function map(slug, title, document) {
  return { slug, title, toDocument: () => document };
}

function repository(maps) {
  return { load: async (slug) => maps[slug] };
}

const root = map("root", "Root map", {
  schemaVersion: 2,
  metadata: {
    tags: ["architecture", "report"],
    summary: "Summary of the root map.",
    explanationPageSlug: "cmap:root-explanation"
  },
  concepts: [
    {
      id: "concept-a", label: "Decision", synopsis: "Choose the approach.",
      aspects: ["governance"], pageSlug: "decisions:approach",
      descriptionPageSlug: "cmap:decision",
      cmapSlug: "child",
      externalUrl: "https://example.com/decision",
      tags: [{ type: "person", value: "Alex Morgan" }, { type: "person", value: "Sam de Vries" }]
    },
    { id: "concept-b", label: "Delivery" }
  ],
  items: [
    { id: 1, conceptId: "concept-a", kind: "concept" },
    { id: 2, kind: "phrase", label: "enables" },
    { id: 3, conceptId: "concept-b", kind: "concept" }
  ],
  connectors: [
    { id: 1, sourceId: 1, targetId: 2, hasArrow: false },
    { id: 2, sourceId: 2, targetId: 3, hasArrow: true }
  ]
});

const child = map("child", "Child map", {
  schemaVersion: 2,
  metadata: { tags: ["detail"], summary: "Child summary." },
  concepts: [{ id: "concept-c", label: "Child concept", cmapSlug: "root" }],
  items: [{ id: 1, conceptId: "concept-c", kind: "concept" }],
  connectors: []
});

const pages = new Map([
  ["cmap:root-explanation", { slug: "cmap:root-explanation", title: "Root explanation", tags: ["explanation"], markdown: "# Why\n\nBecause." }],
  ["decisions:approach", { slug: "decisions:approach", title: "Approach", tags: ["decision"], markdown: "# Decision\n\nUse the simple option." }],
  ["cmap:decision", { slug: "cmap:decision", title: "Decision explanation", tags: [], markdown: "Details." }]
]);

test("exports metadata, person tags, relations and linked maps to the selected depth", async () => {
  const exporter = new CmapMarkdownExporter(
    repository({ root, child }),
    async (slug) => pages.get(slug));
  const markdown = await exporter.export(root, {
    maxDepth: 1,
    includeWikiPages: false,
    language: "nl"
  });

  assert.match(markdown, /CMap: Root map \(niveau 0\)/);
  assert.match(markdown, /CMap: Child map \(niveau 1\)/);
  assert.match(markdown, /`architecture`, `report`/);
  assert.match(markdown, /Personen \(verantwoordelijkheid\/actie\):\*\* Alex Morgan, Sam de Vries/);
  assert.match(markdown, /Decision — \*\*enables\*\* → Delivery/);
  assert.match(markdown, /### CMap-uitleg/);
  assert.match(markdown, /Webpagina:\*\* https:\/\/example\.com\/decision/);
  assert.doesNotMatch(markdown, /## Gekoppelde wikipagina's/);
  assert.equal((markdown.match(/## CMap: Root map/g) || []).length, 1, "cycles are exported once");
});

test("depth zero exports only the selected map", async () => {
  const exporter = new CmapMarkdownExporter(
    repository({ root, child }),
    async (slug) => pages.get(slug));
  const markdown = await exporter.export(root, {
    maxDepth: 0,
    includeWikiPages: false
  });
  assert.match(markdown, /Root map/);
  assert.doesNotMatch(markdown, /## CMap: Child map/);
});

test("optionally appends linked wiki pages and concept explanations", async () => {
  const exporter = new CmapMarkdownExporter(
    repository({ root, child }),
    async (slug) => pages.get(slug));
  const markdown = await exporter.export(root, {
    maxDepth: 0,
    includeWikiPages: true,
    language: "en"
  });
  assert.match(markdown, /## Linked wiki pages/);
  assert.match(markdown, /### Approach/);
  assert.match(markdown, /### Decision explanation/);
  assert.equal((markdown.match(/Root explanation/g) || []).length, 0,
    "the explanation page is embedded under the CMap rather than duplicated as an appendix heading");
  assert.match(markdown, /Because\./);
});

test("derived views contain their root subtree and inherit useful root metadata", async () => {
  const source = {
    schemaVersion: 2,
    concepts: [
      { id: "root-concept", label: "Team", synopsis: "Team scope", aspects: ["people"], descriptionPageSlug: "cmap:team" },
      { id: "child-concept", label: "Work" },
      { id: "outside-concept", label: "Outside" }
    ],
    items: [
      { id: 10, conceptId: "root-concept", kind: "submap" },
      { id: 11, conceptId: "child-concept", kind: "concept", parentSubmapId: 10 },
      { id: 12, conceptId: "outside-concept", kind: "concept" }
    ],
    connectors: [
      { id: 1, sourceId: 10, targetId: 11 },
      { id: 2, sourceId: 11, targetId: 12 }
    ]
  };
  const derived = map("team", "Team", {
    derivedView: { sourceCmapSlug: "source", rootItemId: 10 }
  });
  const sourceMap = map("source", "Source", source);
  const exporter = new CmapMarkdownExporter(
    repository({ source: sourceMap }),
    async (slug) => ({ slug, title: slug, markdown: "Team explanation", tags: [] }));
  const markdown = await exporter.export(derived, { maxDepth: 0 });
  assert.match(markdown, /Team scope/);
  assert.match(markdown, /`people`/);
  assert.match(markdown, /#### Work/);
  assert.doesNotMatch(markdown, /#### Outside/);
  assert.match(markdown, /Team explanation/);
});

test("direct and phrase relations receive readable Markdown", async () => {
  const documentValue = {
    items: [
      { id: 1, label: "A" }, { id: 2, kind: "phrase", label: "supports" },
      { id: 3, label: "B" }, { id: 4, label: "C" }
    ],
    connectors: [
      { sourceId: 1, targetId: 2, hasArrow: false },
      { sourceId: 2, targetId: 3, hasArrow: true },
      { sourceId: 3, targetId: 4, hasArrow: true }
    ]
  };
  const relationMap = map("relations", "Relations", documentValue);
  const exporter = new CmapMarkdownExporter(
    repository({ relations: relationMap }),
    async () => null);
  const markdown = await exporter.export(relationMap);
  assert.match(markdown, /A — \*\*supports\*\* → B/);
  assert.match(markdown, /B → C/);
});