import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:inventory_app/constants.dart';
import 'package:inventory_app/models/inventory_line.dart';
import 'package:inventory_app/service/axelor_client.dart';
import 'package:inventory_app/widgets/glass_widgets.dart';

class BureauInventoryPage extends StatefulWidget {
  final int locationId;
  final String locationName;

  const BureauInventoryPage({
    super.key,
    required this.locationId,
    required this.locationName,
  });

  @override
  State<BureauInventoryPage> createState() => _BureauInventoryPageState();
}

class _BureauInventoryPageState extends State<BureauInventoryPage> {
  Future<List<InventoryLine>?>? _future;
  List<InventoryLine> _allLines = [];
  final TextEditingController _searchController = TextEditingController();
  String _query = '';

  @override
  void initState() {
    super.initState();
    _searchController.addListener(() {
      setState(() => _query = _searchController.text.trim().toLowerCase());
    });
    _load();
  }

  @override
  void dispose() {
    _searchController.dispose();
    super.dispose();
  }

  Future<void> _load() async {
    final client = await AxelorClient.create();
    setState(() {
      _future = client.fetchInventoryLinesByLocation(widget.locationId).then((
        lines,
      ) {
        _allLines = lines ?? [];
        return lines;
      });
    });
  }

  List<InventoryLine> get _filteredLines {
    if (_query.isEmpty) return _allLines;
    return _allLines.where((line) {
      return line.productName.toLowerCase().contains(_query) ||
          line.ticketId.toLowerCase().contains(_query) ||
          (line.observation?.toLowerCase().contains(_query) ?? false) ||
          (line.description?.toLowerCase().contains(_query) ?? false);
    }).toList();
  }

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return Scaffold(
      body: Stack(
        children: [
          const FancyBackground(),
          SafeArea(
            child: Column(
              children: [
                BackAppBar(
                  title: widget.locationName,
                  icon: Icons.business_rounded,
                ),
                Expanded(
                  child: FutureBuilder<List<InventoryLine>?>(
                    future: _future,
                    builder: (context, snapshot) {
                      if (snapshot.connectionState == ConnectionState.waiting) {
                        return const Center(child: CircularProgressIndicator());
                      }

                      if (snapshot.hasError || snapshot.data == null) {
                        return Center(
                          child: Column(
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              const Icon(
                                Icons.error_outline,
                                color: Colors.redAccent,
                                size: 48,
                              ),
                              const SizedBox(height: 12),
                              Text(
                                'Impossible de charger les articles.',
                                style: TextStyle(color: Colors.redAccent),
                              ),
                              const SizedBox(height: 12),
                              ElevatedButton.icon(
                                icon: const Icon(Icons.refresh),
                                label: const Text('Réessayer'),
                                onPressed: _load,
                              ),
                            ],
                          ),
                        );
                      }

                      if (_allLines.isEmpty) {
                        return Center(
                          child: Column(
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              Icon(
                                Icons.inventory_2_outlined,
                                size: 64,
                                color: Colors.grey.shade400,
                              ),
                              const SizedBox(height: 16),
                              Text(
                                'Aucun article trouvé dans ce bureau.',
                                style: TextStyle(
                                  fontSize: 16,
                                  color: Colors.grey.shade600,
                                  fontWeight: FontWeight.w500,
                                ),
                              ),
                            ],
                          ),
                        );
                      }

                      final filtered = _filteredLines;
                      return Column(
                        children: [
                          _SearchBar(
                            controller: _searchController,
                            isDark: isDark,
                            total: _allLines.length,
                            shown: filtered.length,
                          ),
                          Expanded(
                            child:
                                filtered.isEmpty
                                    ? Center(
                                      child: Text(
                                        'Aucun résultat pour "${_searchController.text}"',
                                        style: TextStyle(
                                          fontSize: 15,
                                          color: Colors.grey.shade500,
                                        ),
                                        textAlign: TextAlign.center,
                                      ),
                                    )
                                    : RefreshIndicator(
                                      onRefresh: _load,
                                      child: ListView.builder(
                                        physics: const BouncingScrollPhysics(),
                                        padding: const EdgeInsets.fromLTRB(
                                          16,
                                          4,
                                          16,
                                          100,
                                        ),
                                        itemCount: filtered.length,
                                        itemBuilder: (context, index) {
                                          return _LineCard(
                                            line: filtered[index],
                                            isDark: isDark,
                                            onTap:
                                                () => _showDetails(
                                                  context,
                                                  filtered[index],
                                                ),
                                          );
                                        },
                                      ),
                                    ),
                          ),
                        ],
                      );
                    },
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  void _showDetails(BuildContext context, InventoryLine line) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    final textColor = isDark ? Colors.white : Colors.blue.shade700;

    showModalBottomSheet(
      context: context,
      backgroundColor: Colors.transparent,
      barrierColor: Colors.black.withValues(alpha: 0.3),
      isScrollControlled: true,
      builder: (_) {
        return Padding(
          padding: const EdgeInsets.all(12),
          child: GlassCard(
            child: SingleChildScrollView(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  SheetHandle(Colors.blue),
                  Padding(
                    padding: const EdgeInsets.only(left: 8.0),
                    child: Text(
                      line.productName,
                      style: kTextFormFieldStyle(
                        fontSize: 18.0,
                        fontWeight: FontWeight.bold,
                        color: Colors.blue.shade700,
                      ),
                    ),
                  ),
                  const SizedBox(height: 12),
                  _detail('N° Ticket', line.ticketId, textColor),
                  if (line.description != null && line.description!.isNotEmpty)
                    _detail('État', line.description!, textColor),
                  if (line.observation != null && line.observation!.isNotEmpty)
                    _detail('N° Série', line.observation!, textColor),
                  if (line.firstCounting != null && line.firstCounting! > 0)
                    _detail(
                      'Comptage 1',
                      line.firstCounting!.toStringAsFixed(0),
                      textColor,
                    ),
                  if (line.secondCounting != null && line.secondCounting! > 0)
                    _detail(
                      'Comptage 2',
                      line.secondCounting!.toStringAsFixed(0),
                      textColor,
                    ),
                  if (line.thirdCounting != null && line.thirdCounting! > 0)
                    _detail(
                      'Comptage 3',
                      line.thirdCounting!.toStringAsFixed(0),
                      textColor,
                    ),
                  if (line.firstCountingDate != null)
                    _detail(
                      'Date C1',
                      _formatDate(line.firstCountingDate!),
                      textColor,
                    ),
                  if (line.firstCountingByUser != null)
                    _detail(
                      'Agent C1',
                      line.firstCountingByUser!['fullName'] ?? '-',
                      textColor,
                    ),
                  const SizedBox(height: 16),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12.0),
                    child: SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        icon: const Icon(
                          Icons.close_rounded,
                          color: Colors.white,
                        ),
                        label: const Text(
                          'Fermer',
                          style: TextStyle(color: Colors.white),
                        ),
                        onPressed: () => Navigator.pop(context),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.blue,
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(12),
                          ),
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
        );
      },
    );
  }

  Widget _detail(String label, String value, Color textColor) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4, horizontal: 12),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 110,
            child: Text(
              label,
              style: kTextFormFieldStyle(
                fontWeight: FontWeight.w600,
                color: textColor,
              ),
            ),
          ),
          Expanded(
            child: Text(
              value,
              style: kTextFormFieldStyle(
                fontWeight: FontWeight.bold,
                color: textColor,
              ),
            ),
          ),
        ],
      ),
    );
  }

  String _formatDate(String iso) {
    try {
      final dt = DateTime.parse(iso).toLocal();
      return '${dt.day.toString().padLeft(2, '0')}/${dt.month.toString().padLeft(2, '0')}/${dt.year}';
    } catch (_) {
      return iso;
    }
  }
}

// ── Search bar ───────────────────────────────────────────────────────────────

class _SearchBar extends StatelessWidget {
  final TextEditingController controller;
  final bool isDark;
  final int total;
  final int shown;

  const _SearchBar({
    required this.controller,
    required this.isDark,
    required this.total,
    required this.shown,
  });

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(16, 4, 16, 8),
      child: TextField(
        controller: controller,
        style: TextStyle(color: isDark ? Colors.white : Colors.black87),
        decoration: InputDecoration(
          hintText: 'Rechercher par nom, ticket, état...',
          hintStyle: TextStyle(
            color: isDark ? Colors.white38 : Colors.black38,
            fontSize: 14,
          ),
          prefixIcon: Icon(
            Icons.search_rounded,
            color: isDark ? Colors.white54 : Colors.black45,
          ),
          suffixIcon:
              controller.text.isNotEmpty
                  ? IconButton(
                    icon: Icon(
                      Icons.close_rounded,
                      color: isDark ? Colors.white54 : Colors.black45,
                    ),
                    onPressed: () => controller.clear(),
                  )
                  : Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Text(
                      '$total articles',
                      style: TextStyle(
                        fontSize: 12,
                        color: isDark ? Colors.white38 : Colors.black38,
                      ),
                    ),
                  ),
          filled: true,
          fillColor:
              isDark
                  ? Colors.white.withValues(alpha: 0.08)
                  : Colors.white.withValues(alpha: 0.75),
          border: OutlineInputBorder(
            borderRadius: BorderRadius.circular(16),
            borderSide: BorderSide.none,
          ),
          contentPadding: const EdgeInsets.symmetric(vertical: 12),
        ),
      ),
    );
  }
}

// ── Card for each inventory line ─────────────────────────────────────────────

class _LineCard extends StatelessWidget {
  final InventoryLine line;
  final bool isDark;
  final VoidCallback onTap;

  const _LineCard({
    required this.line,
    required this.isDark,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    final textColor = isDark ? Colors.white : Colors.blue.shade700;
    final subColor = isDark ? Colors.white70 : Colors.blue.shade400;

    final qty =
        (line.thirdCounting ?? 0) > 0
            ? line.thirdCounting!
            : (line.secondCounting ?? 0) > 0
            ? line.secondCounting!
            : (line.firstCounting ?? 0);

    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 6),
      child: GlassCard(
        child: InkWell(
          borderRadius: BorderRadius.circular(20),
          onTap: () {
            HapticFeedback.selectionClick();
            onTap();
          },
          child: Padding(
            padding: const EdgeInsets.all(5),
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Container(
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(
                    color: Colors.blue.withValues(alpha: 0.12),
                    shape: BoxShape.circle,
                  ),
                  child: const Icon(
                    Icons.inventory_2_rounded,
                    color: Colors.blue,
                    size: 22,
                  ),
                ),
                const SizedBox(width: 12),

                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        line.productName,
                        style: kTextFormFieldStyle(
                          fontWeight: FontWeight.bold,
                          color: textColor,
                        ),
                      ),
                      const SizedBox(height: 4),
                      if (line.ticketId.isNotEmpty)
                        Text(
                          'Ticket: ${line.ticketId}',
                          style: kTextFormFieldStyle(
                            fontSize: 12.0,
                            color: subColor,
                          ),
                        ),
                      if (line.description != null &&
                          line.description!.isNotEmpty)
                        Padding(
                          padding: const EdgeInsets.only(top: 2),
                          child: Text(
                            'État: ${line.description}',
                            style: kTextFormFieldStyle(
                              fontSize: 12.0,
                              color: subColor,
                            ),
                          ),
                        ),
                      if (line.observation != null &&
                          line.observation!.isNotEmpty)
                        Padding(
                          padding: const EdgeInsets.only(top: 2),
                          child: Text(
                            'N° Série: ${line.observation}',
                            style: kTextFormFieldStyle(
                              fontSize: 12.0,
                              color: subColor,
                            ),
                          ),
                        ),
                      const SizedBox(height: 6),
                      Wrap(
                        spacing: 6,
                        children: [
                          if ((line.firstCounting ?? 0) > 0)
                            _CountChip(
                              label:
                                  'C1: ${line.firstCounting!.toStringAsFixed(0)}',
                            ),
                          if ((line.secondCounting ?? 0) > 0)
                            _CountChip(
                              label:
                                  'C2: ${line.secondCounting!.toStringAsFixed(0)}',
                              color: Colors.orange,
                            ),
                          if ((line.thirdCounting ?? 0) > 0)
                            _CountChip(
                              label:
                                  'C3: ${line.thirdCounting!.toStringAsFixed(0)}',
                              color: Colors.green,
                            ),
                        ],
                      ),
                    ],
                  ),
                ),

                Container(
                  padding: const EdgeInsets.symmetric(
                    horizontal: 10,
                    vertical: 6,
                  ),
                  decoration: BoxDecoration(
                    color: Colors.blue.withValues(alpha: 0.15),
                    borderRadius: BorderRadius.circular(12),
                  ),
                  child: Text(
                    qty.toStringAsFixed(0),
                    style: const TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                      color: Colors.blue,
                    ),
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class _CountChip extends StatelessWidget {
  final String label;
  final Color color;

  const _CountChip({required this.label, this.color = Colors.blue});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
      decoration: BoxDecoration(
        color: color.withValues(alpha: 0.12),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: color.withValues(alpha: 0.3)),
      ),
      child: Text(
        label,
        style: TextStyle(
          fontSize: 11,
          fontWeight: FontWeight.w600,
          color: color,
        ),
      ),
    );
  }
}