import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../../../models/profile.model.dart';
import '../../../models/programmer_task.model.dart';
import '../../../providers/programmer_day_data_provider.dart';
import '../../../providers/programmer_projects_provider.dart';
import '../../../theme/app_status_colors.dart';
import '../../../utils/app_time.dart';
import '../../../widgets/m3_card.dart';
import '../../../widgets/status_pill.dart';
import '../../../widgets/tech_chip.dart';
import '../programmer_task_actions.dart';
import '../programmer_task_status_kind.dart';

/// Shared task card that reflects the current run state (running / paused /
/// not started) sourced from [programmerRunStatesProvider].
///
/// Used by the task list screen (and any future surface) so the paused-task
/// pill and action buttons are consistent everywhere.
class ProgrammerTaskCard extends ConsumerWidget {
  const ProgrammerTaskCard({
    super.key,
    required this.task,
    this.assignee,
    required this.isMine,
    this.readOnly = false,
  });

  final ProgrammerTask task;
  final Profile? assignee;
  final bool isMine;
  final bool readOnly;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final tt = Theme.of(context).textTheme;
    final cs = Theme.of(context).colorScheme;

    final runStates = ref.watch(programmerRunStatesProvider);
    final runInfo = runStates[task.id];
    final isPaused = runInfo?.state == ProgrammerRunState.paused;
    final isRunning = runInfo?.state == ProgrammerRunState.running;

    final canStart =
        isMine && !readOnly && task.status == ProgrammerTaskStatus.queued;
    final canResume = isMine && !readOnly && isPaused;
    final canComplete = isMine && !readOnly && (isRunning || isPaused);

    final project = task.projectId == null
        ? null
        : ref.watch(programmerProjectByIdProvider(task.projectId!));

    final pillKind =
        isPaused ? StatusKind.warning : programmerTaskStatusKind(task.status);
    final pillLabel =
        isPaused ? 'Paused' : ProgrammerTaskStatus.label(task.status);

    return M3Card.outlined(
      onTap: () => context.go('/programmer-tasks/${task.id}'),
      child: Padding(
        padding: const EdgeInsets.all(14),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Expanded(
                  child: Text(
                    task.title,
                    style:
                        tt.titleMedium?.copyWith(fontWeight: FontWeight.w600),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                ),
                const SizedBox(width: 8),
                StatusPill.kind(pillKind, label: pillLabel),
              ],
            ),
            const SizedBox(height: 10),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              crossAxisAlignment: WrapCrossAlignment.center,
              children: [
                TechChip(task.category,
                    icon: Icons.category_outlined, dense: true),
                if (project != null)
                  TechChip(project.name,
                      icon: Icons.folder_outlined, dense: true),
                if (assignee != null && !isMine)
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Icon(Icons.person_outline,
                          size: 14, color: cs.onSurfaceVariant),
                      const SizedBox(width: 4),
                      Text(
                        assignee!.fullName,
                        style: tt.bodySmall
                            ?.copyWith(color: cs.onSurfaceVariant),
                      ),
                    ],
                  ),
                Text(
                  AppTime.relative(task.createdAt),
                  style: tt.bodySmall?.copyWith(color: cs.onSurfaceVariant),
                ),
              ],
            ),
            if (canStart || canResume) ...[
              const SizedBox(height: 12),
              Align(
                alignment: Alignment.centerRight,
                child: FilledButton.tonalIcon(
                  onPressed: () =>
                      startProgrammerTaskWithPausePrompt(context, ref, task),
                  icon: const Icon(Icons.play_arrow_rounded, size: 18),
                  label: Text(canResume ? 'Resume' : 'Start'),
                ),
              ),
            ],
            if (canComplete) ...[
              const SizedBox(height: 8),
              Align(
                alignment: Alignment.centerRight,
                child: OutlinedButton.icon(
                  onPressed: () =>
                      completeProgrammerTaskWithConfirm(context, ref, task),
                  icon: const Icon(Icons.check_rounded, size: 18),
                  label: const Text('Complete'),
                ),
              ),
            ],
          ],
        ),
      ),
    );
  }
}