import 'package:flutter/material.dart';

import '../../api/oa_client.dart';
import '../../device/device_bridge.dart';
import '../../labels.dart';
import '../desk_theme.dart';
import '../widgets/desk_data_table.dart';
import '../widgets/desk_widgets.dart';
import 'desk_record_detail_page.dart';

const _kinds = [
  ('PERSONAL', '请假'),
  ('OVERTIME', '加班'),
  ('BUSINESS', '出差'),
  ('OUT', '外出'),
  ('REGULARIZE', '转正'),
  ('RESIGN', '离职'),
];

class DeskHrApplyPage extends StatefulWidget {
  const DeskHrApplyPage({super.key, required this.api});
  final OaClient api;

  @override
  State<DeskHrApplyPage> createState() => _DeskHrApplyPageState();
}

class _DeskHrApplyPageState extends State<DeskHrApplyPage> {
  List<Map<String, dynamic>> _items = [];
  bool _loading = true;
  String _bucket = '';

  @override
  void initState() {
    super.initState();
    _load();
  }

  Future<void> _load() async {
    setState(() => _loading = true);
    try {
      final q = _bucket.isEmpty ? null : {'bucket': _bucket};
      final data = await widget.api.get('/leave-requests', query: q);
      if (!mounted) return;
      setState(() {
        _items = asMaps(data);
        _loading = false;
      });
    } catch (_) {
      if (mounted) setState(() => _loading = false);
    }
  }

  Future<void> _create() async {
    var kind = 'LEAVE';
    final reason = TextEditingController();
    final days = TextEditingController(text: '1');
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('发起人事申请'),
        content: SizedBox(
          width: 420,
          child: StatefulBuilder(
            builder: (ctx, setSt) => Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                Wrap(
                  spacing: 6,
                  runSpacing: 6,
                  children: [
                    for (final k in _kinds)
                      FilterChip(
                        label: Text(k.$2),
                        selected: kind == k.$1,
                        onSelected: (_) => setSt(() => kind = k.$1),
                      ),
                  ],
                ),
                const SizedBox(height: 12),
                TextField(controller: days, keyboardType: TextInputType.number, decoration: const InputDecoration(labelText: '天数')),
                const SizedBox(height: 8),
                TextField(controller: reason, maxLines: 3, decoration: const InputDecoration(labelText: '事由')),
              ],
            ),
          ),
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('取消')),
          FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('提交')),
        ],
      ),
    );
    if (ok != true) return;
    try {
      final created = Map<String, dynamic>.from(await widget.api.post('/leave-requests', {
        'kind': kind,
        'reason': reason.text.trim(),
        'days': num.tryParse(days.text) ?? 1,
      }) as Map);
      final id = '${created['id'] ?? ''}';
      if (id.isNotEmpty && mounted) {
        final add = await showDialog<bool>(
          context: context,
          builder: (ctx) => AlertDialog(
            title: const Text('添加申请材料'),
            content: const Text('可以上传病假证明、行程单等附件。'),
            actions: [
              TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('暂不添加')),
              FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('选择附件')),
            ],
          ),
        );
        if (add == true) {
          final picked = await DeviceBridge.pickFile();
          if (picked != null && picked['path'] != null) {
            await widget.api.uploadFile(
              filePath: picked['path']!,
              filename: picked['name'] ?? '申请材料',
              bizType: 'HR_LEAVE',
              bizId: id,
              mime: picked['mime'],
            );
          }
        }
      }
      if (mounted) {
        deskToast(context, '已提交，等待审批');
        _load();
      }
    } catch (e) {
      if (mounted) deskToast(context, '$e', error: true);
    }
  }

  @override
  Widget build(BuildContext context) {
    return DeskListScaffold(
      title: '人事申请',
      loading: _loading,
      actions: [
        FilledButton.icon(
          style: FilledButton.styleFrom(backgroundColor: kDeskBind),
          onPressed: _create,
          icon: const Icon(Icons.add, size: 18),
          label: const Text('发起申请'),
        ),
      ],
      filters: DeskFilterChips(
        value: _bucket,
        onChanged: (v) {
          setState(() => _bucket = v);
          _load();
        },
        items: const [('', '全部'), ('pending', '待审批'), ('approved', '已通过'), ('rejected', '已驳回')],
      ),
      body: DeskDataTable(
        columns: const ['类型', '事由', '状态', '时间'],
        rows: [
          for (final r in _items)
            [zh(r['kind']), '${r['reason'] ?? ''}', zh(r['status']), fmtTime(r['createdAt'])],
        ],
        emptyHint: '还没有人事申请',
        onRowTap: (i) => deskOpenRecord(context, widget.api, {..._items[i], 'source': 'HR'}),
      ),
    );
  }
}