/// Unit tests for the daemon's command dispatcher.
library;

import 'package:clide/clide.dart';
import 'package:clide/src/ipc/command_schema.dart';
import 'package:test/test.dart';

IpcRequest _req(String cmd, {String id = '1', Map<String, Object?> args = const {}}) {
  return IpcRequest(id: id, cmd: cmd, args: args);
}

void main() {
  group('DaemonDispatcher', () {
    test('ping is registered by default and returns pong + version', () async {
      final d = DaemonDispatcher();
      final r = await d.dispatch(_req('ping'));
      expect(r.ok, isTrue);
      expect(r.data['pong'], isTrue);
      expect(r.data['version'], isNotNull);
      expect(r.data['ts'], isA<String>());
    });

    test('version returns the bundled version string', () async {
      final d = DaemonDispatcher();
      final r = await d.dispatch(_req('version'));
      expect(r.ok, isTrue);
      expect(r.data['version'], clideVersion);
    });

    test('dispatching an unknown command produces a not-found error', () async {
      final d = DaemonDispatcher();
      final r = await d.dispatch(_req('nonsense'));
      expect(r.ok, isFalse);
      expect(r.error?.kind, IpcErrorKind.notFound);
      expect(r.error?.message, contains('unknown command'));
    });

    test('register routes a new handler', () async {
      final d = DaemonDispatcher();
      d.register('echo', (req) async {
        return IpcResponse.ok(id: req.id, data: {'echo': req.args['text']});
      });
      final r = await d.dispatch(_req('echo', args: {'text': 'hi'}));
      expect(r.ok, isTrue);
      expect(r.data['echo'], 'hi');
    });

    test('isEmpty is true for a fresh dispatcher (ping + version only)', () {
      final d = DaemonDispatcher();
      expect(d.isEmpty, isTrue);
      d.register('something', (req) async => IpcResponse.ok(id: req.id, data: const {}));
      expect(d.isEmpty, isFalse);
    });

    test('capabilities reflects the live registry with schemas (T-248)', () async {
      final d = DaemonDispatcher();
      d.register('echo', (req) async => IpcResponse.ok(id: req.id, data: const {}));
      d.register(
        'pane.resize',
        (req) async => IpcResponse.ok(id: req.id, data: const {}),
        schema: const CommandSchema(
          positional: ['id', 'cols'],
          args: {
            'id': ArgSpec(required: true),
            'cols': ArgSpec(type: ArgType.number, min: 1),
          },
        ),
      );

      final r = await d.dispatch(_req('capabilities'));
      expect(r.ok, isTrue);
      final commands = r.data['commands'] as Map<String, Object?>;
      // Built-ins + the two just registered are all discoverable.
      expect(commands.keys, containsAll(['ping', 'version', 'capabilities', 'echo', 'pane.resize']));

      // Subsystem/verb split.
      final resize = commands['pane.resize'] as Map<String, Object?>;
      expect(resize['subsystem'], 'pane');
      expect(resize['verb'], 'resize');
      expect(resize['positional'], ['id', 'cols']);
      final args = resize['args'] as Map<String, Object?>;
      expect((args['id'] as Map)['required'], true);
      expect((args['cols'] as Map)['type'], 'number');
      expect((args['cols'] as Map)['min'], 1);

      // A schema-less command carries no positional/args keys.
      final echo = commands['echo'] as Map<String, Object?>;
      expect(echo['subsystem'], '');
      expect(echo.containsKey('args'), isFalse);
    });

    test('mcpTools generates the tool surface from the registry (T-225)', () async {
      final d = DaemonDispatcher();
      d.register('echo', (req) async => IpcResponse.ok(id: req.id, data: const {}));
      d.register(
        'pane.resize',
        (req) async => IpcResponse.ok(id: req.id, data: const {}),
        schema: const CommandSchema(
          positional: ['id', 'cols'],
          args: {
            'id': ArgSpec(required: true),
            'cols': ArgSpec(type: ArgType.number, min: 1),
          },
        ),
      );
      d.register('pane.tail', (req) async => IpcResponse.ok(id: req.id, data: const {}), mcpExpose: false);
      d.register(
        'files.read',
        (req) async => IpcResponse.ok(id: req.id, data: const {}),
        schema: const CommandSchema(
          positional: ['path'],
          args: {
            'path': ArgSpec(pattern: null, allowed: {'a', 'b'}),
            'recursive': ArgSpec(type: ArgType.boolean),
            'globs': ArgSpec(type: ArgType.stringList, maxItems: 5),
          },
        ),
      );

      // Non-const so a RegExp pattern can be supplied (covers the string
      // `pattern` mapping).
      d.register(
        'git.checkout',
        (req) async => IpcResponse.ok(id: req.id, data: const {}),
        schema: CommandSchema(
          positional: const ['ref'],
          args: {'ref': ArgSpec(pattern: RegExp(r'^\w+$'))},
        ),
      );

      final tools = d.mcpTools();
      final byName = {for (final t in tools) t['name'] as String: t};

      // Tools are prefixed; built-ins + registered commands are present.
      expect(byName.keys, containsAll(['mcp__clide__ping', 'mcp__clide__echo', 'mcp__clide__pane.resize']));
      // The opt-out command is withheld.
      expect(byName.containsKey('mcp__clide__pane.tail'), isFalse);

      // Schema → JSON-Schema inputSchema.
      final resize = byName['mcp__clide__pane.resize']!;
      expect(resize['description'], 'pane: resize');
      final input = resize['inputSchema'] as Map<String, Object?>;
      expect(input['type'], 'object');
      final props = input['properties'] as Map<String, Object?>;
      expect((props['cols'] as Map)['type'], 'number');
      expect((props['cols'] as Map)['minimum'], 1);
      expect(input['required'], ['id']);

      // A schema-less command gets an empty object input with no required.
      final echo = byName['mcp__clide__echo']!;
      final echoInput = echo['inputSchema'] as Map<String, Object?>;
      expect(echoInput['properties'], isEmpty);
      expect(echoInput.containsKey('required'), isFalse);

      // Each ArgType maps to its JSON-Schema shape.
      final readProps = (byName['mcp__clide__files.read']!['inputSchema'] as Map)['properties'] as Map;
      expect((readProps['path'] as Map)['type'], 'string');
      expect((readProps['path'] as Map)['enum'], ['a', 'b']);
      expect((readProps['recursive'] as Map)['type'], 'boolean');
      expect((readProps['globs'] as Map)['type'], 'array');
      expect(((readProps['globs'] as Map)['items'] as Map)['type'], 'string');
      expect((readProps['globs'] as Map)['maxItems'], 5);

      final refProps = (byName['mcp__clide__git.checkout']!['inputSchema'] as Map)['properties'] as Map;
      expect((refProps['ref'] as Map)['pattern'], r'^\w+$');
    });

    test('clear removes user handlers but keeps the built-ins', () async {
      final d = DaemonDispatcher();
      d.register('extra', (req) async => IpcResponse.ok(id: req.id, data: const {}));
      expect(d.isEmpty, isFalse);
      d.clear();
      expect(d.isEmpty, isTrue);
      // ping still works
      final r = await d.dispatch(_req('ping'));
      expect(r.ok, isTrue);
      // 'extra' is gone
      final r2 = await d.dispatch(_req('extra'));
      expect(r2.ok, isFalse);
    });
  });
}