flux/lib/features/customers/ui/customer_detail_screen.dart

import 'package:flutter/material.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flux/core/theme/theme.dart';
import 'package:flux/features/customers/data/customer_repository.dart';
import 'package:flux/features/customers/models/customer_model.dart';
import 'package:flux/features/customers/models/customer_file_model.dart';
import 'package:get_it/get_it.dart';

class CustomerDetailScreen extends StatefulWidget {
  final CustomerModel customer;
  const CustomerDetailScreen({super.key, required this.customer});

  @override
  State<CustomerDetailScreen> createState() => _CustomerDetailScreenState();
}

class _CustomerDetailScreenState extends State<CustomerDetailScreen> {
  final _repository = GetIt.I<CustomerRepository>();
  List<CustomerFileModel> _files = [];
  bool _isLoadingFiles = true;

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

  Future<void> _loadFiles() async {
    try {
      final files = await _repository.getCustomerFiles(
        widget.customer.id.toString(),
      );
      setState(() {
        _files = files;
        _isLoadingFiles = false;
      });
    } catch (e) {
      setState(() => _isLoadingFiles = false);
      if (mounted) {
        ScaffoldMessenger.of(
          context,
        ).showSnackBar(SnackBar(content: Text(e.toString())));
      }
    }
  }

  Future<void> _pickAndUpload() async {
    // Chiamata statica pulita
    FilePickerResult? result = await FilePicker.pickFiles(
      allowMultiple: true,
      type: FileType.any,
      withData: true, // Fondamentale per avere i bytes pronti se servono
    );

    if (result != null) {
      for (var pickedFile in result.files) {
        try {
          final newFile = await _repository.uploadAndRegisterFile(
            customerId: widget.customer.id.toString(),
            pickedFile: pickedFile,
          );
          setState(() => _files.add(newFile));
        } catch (e) {
          if (mounted) {
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(content: Text("Errore upload ${pickedFile.name}: $e")),
            );
          }
        }
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: context.background,
      appBar: AppBar(
        title: Text(
          widget.customer.nome,
          style: const TextStyle(fontWeight: FontWeight.bold),
        ),
        backgroundColor: context.background,
        elevation: 0,
      ),
      body: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // COLONNA SINISTRA: ANAGRAFICA
          Expanded(
            flex: 1,
            child: SingleChildScrollView(
              padding: const EdgeInsets.all(24),
              child: _buildInfoSection(),
            ),
          ),

          // DIVISORE VERTICALE
          VerticalDivider(
            width: 1,
            color: context.accent.withValues(alpha: 0.1),
          ),

          // COLONNA DESTRA: DOCUMENTI
          Expanded(
            flex: 2,
            child: Padding(
              padding: const EdgeInsets.all(24),
              child: _buildDocumentSection(),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildInfoSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        _infoTile(Icons.phone_android, "Telefono", widget.customer.telefono),
        _infoTile(
          Icons.email_outlined,
          "Email",
          widget.customer.email.isEmpty ? "Non fornita" : widget.customer.email,
        ),
        _infoTile(
          Icons.notes_outlined,
          "Note",
          widget.customer.note.isEmpty
              ? "Nessun appunto"
              : widget.customer.note,
        ),
        const SizedBox(height: 20),
        if (widget.customer.nonDisturbare)
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(
              color: Colors.red.withValues(alpha: 0.1),
              borderRadius: BorderRadius.circular(8),
            ),
            child: const Row(
              children: [
                Icon(Icons.privacy_tip, color: Colors.red, size: 20),
                SizedBox(width: 10),
                Text(
                  "PRIVACY: Non disturbare",
                  style: TextStyle(
                    color: Colors.red,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ],
            ),
          ),
      ],
    );
  }

  Widget _buildDocumentSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Text(
              "DOCUMENTI",
              style: TextStyle(
                fontSize: 18,
                fontWeight: FontWeight.bold,
                color: context.accent,
              ),
            ),
            ElevatedButton.icon(
              onPressed: _pickAndUpload,
              icon: const Icon(Icons.add_circle_outline),
              label: const Text("CARICA FILE"),
            ),
          ],
        ),
        const SizedBox(height: 20),
        if (_isLoadingFiles)
          const Center(child: CircularProgressIndicator())
        else if (_files.isEmpty)
          const Center(child: Text("Nessun documento presente"))
        else
          Expanded(
            child: GridView.builder(
              gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
                maxCrossAxisExtent: 200,
                mainAxisSpacing: 16,
                crossAxisSpacing: 16,
                childAspectRatio: 1.2,
              ),
              itemCount: _files.length,
              itemBuilder: (context, index) => _FileCard(file: _files[index]),
            ),
          ),
      ],
    );
  }

  Widget _infoTile(IconData icon, String label, String value) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(icon, size: 18, color: context.accent),
              const SizedBox(width: 8),
              Text(label, style: const TextStyle(fontWeight: FontWeight.w600)),
            ],
          ),
          const SizedBox(height: 4),
          Text(
            value,
            style: TextStyle(color: context.secondaryText, fontSize: 16),
          ),
        ],
      ),
    );
  }
}

class _FileCard extends StatelessWidget {
  final CustomerFileModel file;
  const _FileCard({required this.file});

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: context.background,
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: context.accent.withValues(alpha: 0.1)),
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(_getFileIcon(file.extension), size: 48, color: context.accent),
          const SizedBox(height: 8),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 8),
            child: Text(
              file.name,
              maxLines: 1,
              overflow: TextOverflow.ellipsis,
              style: const TextStyle(fontSize: 12, fontWeight: FontWeight.w500),
            ),
          ),
        ],
      ),
    );
  }

  IconData _getFileIcon(String ext) {
    switch (ext.toLowerCase()) {
      case 'pdf':
        return Icons.picture_as_pdf;
      case 'jpg':
      case 'jpeg':
      case 'png':
        return Icons.image;
      default:
        return Icons.insert_drive_file;
    }
  }
}