// Targeted cases for the Node API (node.mjs), using small inline fixtures.

import { test } from 'node:test';
import assert from 'node:assert/strict';
import { tokenize } from '../src/lexer.mjs';
import { parse } from '../src/ast.mjs';
import { Node, isDateKey } from '../src/node.mjs';
import { EditSession } from '../src/edit.mjs';

const FAKE_PATH = 'fixture.txt';

function makeNode(text) {
  const tokens = tokenize(text);
  const tree = parse(tokens);
  const session = new EditSession(FAKE_PATH, text, tokens, { bom: false });
  const node = new Node({
    items: tree.items,
    tokens,
    text,
    path: FAKE_PATH,
    layer: 'mod',
    session,
  });
  return { node, session };
}

test('get throws on a duplicated key', () => {
  const { node } = makeNode('discovered_by = western\ndiscovered_by = eastern\n');
  assert.throws(() => node.get('discovered_by'), /occurs 2 times/);
});

test('all returns both values for a duplicated key', () => {
  const { node } = makeNode('discovered_by = western\ndiscovered_by = eastern\n');
  assert.deepEqual(node.all('discovered_by'), ['western', 'eastern']);
});

test('get returns undefined for an absent key (only duplicates throw)', () => {
  const { node } = makeNode('owner = TLD\n');
  assert.equal(node.get('nope'), undefined);
});

test('keys() preserves order and duplicates', () => {
  const { node } = makeNode('owner = TLD\nadd_core = TLD\nadd_core = CAS\nculture = castillian\n');
  assert.deepEqual(node.keys(), ['owner', 'add_core', 'add_core', 'culture']);
});

test('duplicate date blocks are both reachable via blocks(), with and without a key filter', () => {
  const { node } = makeNode(
    '1444.11.11 = {\n\towner = CAS\n}\n1444.11.11 = {\n\treligion = catholic\n}\n',
  );
  const all = node.blocks();
  assert.equal(all.length, 2);
  const byKey = node.blocks('1444.11.11');
  assert.equal(byKey.length, 2);
  assert.equal(byKey[0].get('owner'), 'CAS');
  assert.equal(byKey[1].get('religion'), 'catholic');
});

test('at(): plain assignment resolves to the value in effect as of the given date', () => {
  const { node } = makeNode(
    'owner = FRI\n1473.2.23 = {\n\towner = BUR\n}\n1498.1.1 = {\n\towner = SAX\n}\n',
  );
  assert.equal(node.at('1480.1.1').get('owner'), 'BUR');
  assert.equal(node.at('1460.1.1').get('owner'), 'FRI');
  assert.equal(node.at('1500.1.1').get('owner'), 'SAX');
});

test('at(): add_X/remove_X accumulate into a bucket named X, in insertion order', () => {
  const { node } = makeNode(
    'add_core = FRI\n'
    + '1445.1.1 = {\n\tadd_core = BUR\n}\n'
    + '1477.1.5 = {\n\tadd_core = HAB\n\tremove_core = BUR\n}\n',
  );
  assert.deepEqual(node.at('1500.1.1').all('core'), ['FRI', 'HAB']);
});

test('at() throws a clear error on set/add/remove', () => {
  const { node } = makeNode('owner = FRI\n1473.2.23 = {\n\towner = BUR\n}\n');
  const view = node.at('1480.1.1');
  assert.throws(() => view.set('owner', 'X'), /read-only resolved view/);
  assert.throws(() => view.add('foo', 'X'), /read-only resolved view/);
  assert.throws(() => view.remove('owner'), /read-only resolved view/);
  assert.throws(() => view.at('1500.1.1'), /already an at\(\) view/);
});

test("get('owner') returns the bare start-of-game value even when a later date block changes it", () => {
  const { node } = makeNode(
    'owner = FRI\ncontroller = FRI\n1473.2.23 = {\n\towner = BUR\n\tcontroller = BUR\n}\n',
  );
  assert.equal(node.get('owner'), 'FRI');
  assert.equal(node.get('controller'), 'FRI');
  // The literal add_core/owner-style fields stay reachable through the
  // normal (non-at) read path completely unaffected by at()'s bucket
  // renaming or overwrite resolution.
  assert.equal(node.at('1480.1.1').get('owner'), 'BUR');
});

test('bare value list block parses as a block Node and round-trips untouched', () => {
  const text = 'historical_idea_groups = {\n\teconomic_ideas\n\toffensive_ideas\n}\n';
  const { node } = makeNode(text);
  const block = node.block('historical_idea_groups');
  assert.deepEqual(block.bareValues(), ['economic_ideas', 'offensive_ideas']);
  assert.equal(block.keys().length, 0);
  assert.equal(tokenize(text).map((t) => t.raw).join(''), text);
});

test('RGB triple block parses as a block Node with three bare values', () => {
  const { node } = makeNode('color = { 20 50 210 }\n');
  const block = node.block('color');
  assert.deepEqual(block.bareValues(), ['20', '50', '210']);
});

test('empty block { } is handled with no keys and no bare values', () => {
  const { node } = makeNode('chance = { }\n');
  const block = node.block('chance');
  assert.deepEqual(block.keys(), []);
  assert.deepEqual(block.bareValues(), []);
});

test('set on a quoted value keeps quoting', () => {
  const text = 'owner = "TLD"\n';
  const { node, session } = makeNode(text);
  node.set('owner', 'CAS');
  assert.equal(session.apply(), 'owner = "CAS"\n');
});

test('set on a bare value keeps it bare', () => {
  const text = 'owner = TLD\n';
  const { node, session } = makeNode(text);
  node.set('owner', 'CAS');
  assert.equal(session.apply(), 'owner = CAS\n');
});

test('set throws if the target key has zero or more than one match', () => {
  const { node: n0 } = makeNode('owner = TLD\n');
  assert.throws(() => n0.set('missing', 'X'), /requires exactly one existing entry/);

  const { node: n2 } = makeNode('add_core = TLD\nadd_core = CAS\n');
  assert.throws(() => n2.set('add_core', 'X'), /requires exactly one existing entry/);
});

test('add appends a new entry with exact resulting text', () => {
  const text = 'owner = TLD\ncontroller = TLD\n';
  const { node, session } = makeNode(text);
  node.add('culture', 'castillian');
  assert.equal(session.apply(), 'owner = TLD\ncontroller = TLD\nculture = castillian\n');
});

test('add quotes a value that contains whitespace', () => {
  const text = 'owner = TLD\n';
  const { node, session } = makeNode(text);
  node.add('title', 'City of Toledo');
  assert.equal(session.apply(), 'owner = TLD\ntitle = "City of Toledo"\n');
});

test('remove deletes the exact matching entry and nothing else', () => {
  const text = 'owner = TLD\ncontroller = TLD\nculture = castillian\n';
  const { node, session } = makeNode(text);
  const count = node.remove('controller');
  assert.equal(count, 1);
  assert.equal(session.apply(), 'owner = TLD\nculture = castillian\n');
});

test('remove(key, value) removes only the one matching entry, leaving siblings with the same key intact', () => {
  const text = 'discovered_by = western\ndiscovered_by = eastern\ndiscovered_by = muslim\ndiscovered_by = ottoman\n';
  const { node, session } = makeNode(text);
  const count = node.remove('discovered_by', 'eastern');
  assert.equal(count, 1);
  assert.equal(
    session.apply(),
    'discovered_by = western\ndiscovered_by = muslim\ndiscovered_by = ottoman\n',
  );
});

test('isDateKey recognizes real date-shaped keys and rejects ordinary identifiers', () => {
  assert.ok(isDateKey('1444.11.11'));
  assert.ok(isDateKey('1.1.1'));
  assert.ok(!isDateKey('owner'));
  assert.ok(!isDateKey('add_core'));
});