import 'package:flutter/material.dart';
import 'package:flutter_blue_plus/flutter_blue_plus.dart';
import 'package:eagletracker/class/BLEProvider.dart';
import 'package:eagletracker/class/devicesSaved.dart' as DevicesSaved;
import 'package:eagletracker/class/preferenceSaved.dart' as PreferenceSaved;
import 'package:eagletracker/deviceAdvertizinScan.dart';
import 'package:eagletracker/deviceFlowMap.dart';
import 'package:provider/provider.dart';

class DeviceSelection extends StatefulWidget {
  const DeviceSelection({super.key});

  @override
  State<DeviceSelection> createState() => _DeviceSelectionState();
}

class _DeviceSelectionState extends State<DeviceSelection> {
  List<ScanResult> scanResults = [];
  TextEditingController tecSearch = TextEditingController();
  bool isScanning = false;

  List<DevicesSaved.DevicesSaved> devicesSaved = [];
  PreferenceSaved.PreferenceSaved preferenceSaved =
      PreferenceSaved.PreferenceSaved.empty();

  TextEditingController tecTimeTakingPointSecond = TextEditingController();

  // Initialize Bluetooth scanning and subscription in initState
  @override
  void initState() {
    super.initState();

    isScanning = true;

    PreferenceSaved.restoreLocal().then((value) {
      setState(() {
        preferenceSaved = value;
        tecTimeTakingPointSecond.text =
            preferenceSaved.timeTakingPointSecond.toString();
      });
    });

    DevicesSaved.restoreLocal().then((value) {
      setState(() {
        devicesSaved = value;
      });
    });
    FlutterBluePlus.isSupported.then((isSupported) {
      if (!isSupported) {
        showDialog(
          context: context,
          builder: (context) {
            return AlertDialog(
              title: const Text("Bluetooth non activé"),
              content: const Text(
                  "Le Bluetooth n'est pas activé sur cet appareil. Veillez l'activer pour continuer."),
              actions: [
                TextButton(
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                  child: const Text("OK"),
                ),
              ],
            );
          },
        );
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    final bleProvider = Provider.of<BLEProvider>(context);
    scanResults = bleProvider.scanResults;

    // Filtered list of devices
    List<ScanResult> filteredDevices = scanResults
        .where((result) => result.device.platformName
            .toLowerCase()
            .contains(tecSearch.text.toLowerCase()))
        .toList();

    //Saved devices list is connected ?
    for (var element in devicesSaved) {
      element.connected = scanResults
          .where((result) => result.device.remoteId.str == element.remoteId)
          .isNotEmpty;
    }

    return Scaffold(
      appBar: AppBar(
        actions: [
          IconButton(
              icon: const Icon(Icons.settings, color: Colors.white),
              onPressed: () {
                showDialog(
                  context: context,
                  builder: (BuildContext context) {
                    return AlertDialog(
                      title: const Text('Paramètres'),
                      content: SizedBox(
                        height: 100,
                        child: Column(children: [
                          const Text('Capture des points (secondes)'),
                          TextField(
                            controller: tecTimeTakingPointSecond,
                            keyboardType: TextInputType.number,
                          ),
                        ]),
                      ),
                      actions: <Widget>[
                        TextButton(
                          onPressed: () {
                            Navigator.of(context).pop();
                          },
                          child: const Text('Annuler'),
                        ),
                        TextButton(
                          onPressed: () {
                            Navigator.of(context).pop();

                            preferenceSaved.timeTakingPointSecond =
                                int.parse(tecTimeTakingPointSecond.text);

                            PreferenceSaved.saveLocal(preferenceSaved);

                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Paramètres enregistrés'),
                              ),
                            );
                          },
                          child: const Text('Enregistrer'),
                        ),
                      ],
                    );
                  },
                );
              })
        ],
        backgroundColor: Colors.blue,
        title:
            const Text("Eagle Tr@cker", style: TextStyle(color: Colors.white)),
      ),
      body: Column(
        children: [
          devicesSaved.isNotEmpty
              ? Column(
                  children: [
                    const Padding(
                      padding: EdgeInsets.all(16.0),
                      child: Text('Appareils sauvegardés',
                          style: TextStyle(
                              fontSize: 18.0, fontWeight: FontWeight.bold)),
                    ),
                    ListView.builder(
                      shrinkWrap: true,
                      itemCount: devicesSaved.length,
                      itemBuilder: (context, index) {
                        DevicesSaved.DevicesSaved device = devicesSaved[index];
                        return Container(
                            margin:
                                const EdgeInsets.only(left: 10, right: 10.0),
                            child: Card(
                                child: ListTile(
                              title: Row(children: [
                                Icon(Icons.circle,
                                    color: devicesSaved[index].connected
                                        ? Colors.green
                                        : Colors.orange,
                                    size: 10.0),
                                Text(device.deviceName)
                              ]),
                              subtitle: Text(device.deviceAddress),
                              trailing: Row(
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  GestureDetector(
                                      onTap: () async {
                                        devicesSaved.removeAt(index);
                                        await DevicesSaved.saveLocal(
                                            devicesSaved);
                                        setState(() {
                                          devicesSaved = devicesSaved;
                                        });
                                      },
                                      child: const Icon(Icons.delete)),
                                  GestureDetector(
                                    onTap: () {
                                      if (checkIsScanning(
                                          context, isScanning)) {
                                        Navigator.push(
                                          context,
                                          MaterialPageRoute(
                                              builder: (context) =>
                                                  DeviceAdvertizinScan(
                                                    deviceName:
                                                        device.deviceName,
                                                    deviceAddress:
                                                        device.deviceAddress,
                                                    remoteId: device.remoteId,
                                                  )),
                                        );
                                      }
                                    },
                                    child: const Icon(Icons.info_outline),
                                  ),
                                  GestureDetector(
                                    onTap: () {
                                      if (checkIsScanning(
                                          context, isScanning)) {
                                        Navigator.push(
                                          context,
                                          MaterialPageRoute(
                                            builder: (context) => DeviceFlowMap(
                                              deviceName: device.deviceName,
                                              deviceAddress:
                                                  device.deviceAddress,
                                            ),
                                          ),
                                        );
                                      }
                                    },
                                    child: const Icon(Icons.map_outlined),
                                  ),
                                ],
                              ),
                            )));
                      },
                    ),
                  ],
                )
              : Container(),
          const Padding(
            padding: EdgeInsets.all(16.0),
            child: Text('Recherche d\' appareils BLE',
                style: TextStyle(fontSize: 18.0, fontWeight: FontWeight.bold)),
          ),
          Padding(
            padding: const EdgeInsets.all(16.0),
            child: TextFormField(
              controller: tecSearch,
              decoration: const InputDecoration(
                hintText: 'Rechercher un appareil par nom',
                prefixIcon: Icon(Icons.search),
              ),
              onChanged: (value) {
                setState(() {});
              },
            ),
          ),
          const SizedBox(height: 16.0),
          Expanded(
            child: ListView.builder(
              itemCount: filteredDevices.length,
              itemBuilder: (context, index) {
                ScanResult result = filteredDevices[index];
                return ListTile(
                  trailing: Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      GestureDetector(
                        onTap: () async {
                          if (devicesSaved
                              .where((element) =>
                                  element.deviceAddress ==
                                  result.device.remoteId.str)
                              .isNotEmpty) {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content:
                                    Text('Cet appareil est déjà sauvegardé'),
                              ),
                            );
                            return;
                          }

                          devicesSaved.add(DevicesSaved.DevicesSaved(
                            deviceName: result.device.platformName,
                            deviceAddress: result.device.remoteId.str,
                            remoteId: result.device.remoteId.str,
                          ));
                          await DevicesSaved.saveLocal(devicesSaved);
                          setState(() {
                            devicesSaved = devicesSaved;
                          });
                          ;
                        },
                        child: const Icon(Icons.add),
                      ),
                      GestureDetector(
                        onTap: () {
                          if (checkIsScanning(context, isScanning)) {
                            Navigator.push(
                              context,
                              MaterialPageRoute(
                                builder: (context) => DeviceAdvertizinScan(
                                  deviceName: result.device.platformName,
                                  deviceAddress: result.device.remoteId.str,
                                  remoteId: result.device.remoteId.str,
                                ),
                              ),
                            );
                          }
                        },
                        child: const Icon(Icons.info_outline),
                      ),
                      GestureDetector(
                        onTap: () {
                          if (checkIsScanning(context, isScanning)) return;
                          Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (context) => DeviceFlowMap(
                                deviceName: result.device.platformName,
                                deviceAddress: result.device.remoteId.str,
                              ),
                            ),
                          );
                        },
                        child: const Icon(Icons.map_outlined),
                      ),
                    ],
                  ),
                  title: Row(children: [
                    const Icon(Icons.circle, color: Colors.green, size: 10.0),
                    Text(result.device.platformName)
                  ]),
                  subtitle: Text(result.device.remoteId.str),
                );
              },
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        backgroundColor: Colors.blue,
        onPressed: () {
          setState(() {
            isScanning = !isScanning;
            if (isScanning) {
              bleProvider.startScan();
            } else {
              bleProvider.stopScan();
            }
          });
        },
        child: Icon(isScanning ? Icons.stop : Icons.play_arrow,
            color: Colors.white),
      ),
    );
  }
}

bool checkIsScanning(BuildContext context, bool isScanning) {
  if (!isScanning) {
    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(
        content: Text('Vous devez activer le scan pour continuer'),
      ),
    );
    return false;
  } else {
    return true;
  }
}