import 'package:flutter/material.dart';

import '../api/oa_client.dart';
import '../device/device_bridge.dart';
import '../labels.dart';
import '../theme.dart';
import '../widgets/common.dart';
import '../widgets/wecom.dart';
import '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 HrApplyPage extends StatefulWidget {
  const HrApplyPage({super.key, required this.api});
  final OaClient api;

  @override
  State<HrApplyPage> createState() => _HrApplyPageState();
}

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

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

  Future<void> _load() async {
    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 showModalBottomSheet<bool>(
      context: context,
      isScrollControlled: true,
      builder: (ctx) => Padding(
        padding: EdgeInsets.only(bottom: MediaQuery.viewInsetsOf(ctx).bottom),
        child: StatefulBuilder(
          builder: (ctx, setSt) => SafeArea(
            child: Padding(
              padding: const EdgeInsets.fromLTRB(16, 16, 16, 20),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  const Text('发起人事申请', style: TextStyle(fontSize: 17, fontWeight: FontWeight.w600)),
                  const SizedBox(height: 12),
                  Wrap(
                    spacing: 8,
                    children: [
                      for (final k in _kinds)
                        ChoiceChip(
                          label: Text(k.$2),
                          selected: kind == k.$1,
                          onSelected: (_) => setSt(() => kind = k.$1),
                        ),
                    ],
                  ),
                  const SizedBox(height: 12),
                  TextField(controller: days, keyboardType: TextInputType.number, decoration: const InputDecoration(hintText: '天数')),
                  const SizedBox(height: 8),
                  TextField(controller: reason, maxLines: 3, decoration: const InputDecoration(hintText: '事由')),
                  const SizedBox(height: 16),
                  FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('提交')),
                ],
              ),
            ),
          ),
        ),
      ),
    );
    if (ok != true) return;
    try {
      final created = Map<String, dynamic>.from(await widget.api.post('/leave-requests', {
        'kind': kind,
        'reason': reason.text.trim(),
        'days': num.tryParse(days.text) ?? 1,
      }) as Map);
      final id = '${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) {
        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('已提交，由汇报对象和部门总监审批')));
        _load();
      }
    } catch (e) {
      if (mounted) ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('$e')));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: kPaper,
      appBar: AppBar(
        title: const Text('人事申请'),
        actions: [IconButton(onPressed: _create, icon: const Icon(Icons.add))],
      ),
      body: Column(
        children: [
          SingleChildScrollView(
            scrollDirection: Axis.horizontal,
            padding: const EdgeInsets.fromLTRB(12, 8, 12, 4),
            child: Row(
              children: [
                for (final it in [('', '全部'), ('pending', '待审批'), ('approved', '已通过'), ('rejected', '已驳回')])
                  Padding(
                    padding: const EdgeInsets.only(right: 8),
                    child: ChoiceChip(
                      label: Text(it.$2),
                      selected: _bucket == it.$1,
                      onSelected: (_) {
                        setState(() => _bucket = it.$1);
                        _load();
                      },
                    ),
                  ),
              ],
            ),
          ),
          if (_loading) const LinearProgressIndicator(minHeight: 2, color: kBind),
          Expanded(
            child: _items.isEmpty
                ? const EmptyHint('还没有人事申请')
                : RefreshIndicator(
                    onRefresh: _load,
                    child: ListView(
                      children: [
                        for (final r in _items)
                          ConvTile(
                            title: '${zh(r['kind'])} · ${r['reason'] ?? ''}',
                            preview: '${zh(r['status'])}  ${fmtTime(r['createdAt'])}',
                            avatarIcon: Icons.beach_access_outlined,
                            avatarColor: kBind,
                            avatarLabel: '人',
                            onTap: () => openRecord(context, widget.api, {...r, 'source': 'HR'}),
                          ),
                      ],
                    ),
                  ),
          ),
        ],
      ),
    );
  }
}