import 'package:flutter/material.dart';

import '../../../models/profile.model.dart';
import '../../../models/programmer_task_activity_log.model.dart';
import '../../../utils/app_time.dart';
import '../../../widgets/app_section_header.dart';

/// The task's activity timeline (created/started/paused/adjusted/…), newest first.
class ActivityTimeline extends StatelessWidget {
  const ActivityTimeline({
    super.key,
    required this.logs,
    required this.profileById,
  });

  final List<ProgrammerTaskActivityLog> logs;
  final Map<String, Profile> profileById;

  @override
  Widget build(BuildContext context) {
    final tt = Theme.of(context).textTheme;
    final cs = Theme.of(context).colorScheme;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const AppSectionHeader('Activity'),
        if (logs.isEmpty)
          Text('No activity yet.',
              style: tt.bodySmall?.copyWith(color: cs.onSurfaceVariant))
        else
          for (final log in logs)
            _ActivityRow(log: log, profileById: profileById),
      ],
    );
  }
}

class _ActivityRow extends StatelessWidget {
  const _ActivityRow({required this.log, required this.profileById});

  final ProgrammerTaskActivityLog log;
  final Map<String, Profile> profileById;

  @override
  Widget build(BuildContext context) {
    final tt = Theme.of(context).textTheme;
    final cs = Theme.of(context).colorScheme;
    final actor = log.actorId == null ? null : profileById[log.actorId];

    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 6),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Icon(_iconFor(log.actionType), size: 16, color: cs.onSurfaceVariant),
          const SizedBox(width: 10),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  '${actor?.fullName ?? 'Someone'} · ${_labelFor(log.actionType)}',
                  style: tt.bodyMedium,
                ),
                Text(
                  AppTime.relative(log.createdAt),
                  style: tt.bodySmall?.copyWith(color: cs.onSurfaceVariant),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

String _labelFor(String action) => switch (action) {
  'created' => 'created the task',
  'started' => 'started work',
  'paused' => 'paused',
  'resumed' => 'resumed',
  'completed' => 'completed the task',
  'cancelled' => 'cancelled the task',
  'assigned' => 'assigned the task',
  'reassigned' => 'reassigned the task',
  'adjusted' || 'adjustment' => 'adjusted time',
  'updated' => 'updated details',
  _ => action,
};

IconData _iconFor(String action) => switch (action) {
  'created' => Icons.add_task,
  'started' => Icons.play_arrow_rounded,
  'paused' => Icons.pause_rounded,
  'resumed' => Icons.play_arrow_rounded,
  'completed' => Icons.check_circle_outline,
  'cancelled' => Icons.cancel_outlined,
  'assigned' || 'reassigned' => Icons.person_add_alt_1_outlined,
  'adjustment' => Icons.timelapse_outlined,
  'updated' => Icons.edit_outlined,
  _ => Icons.circle_outlined,
};