import 'package:flutter/material.dart';
import 'package:laserscouter/core/api.dart';
import 'notespage.dart';
import 'teamadder.dart';
import 'package:to_csv/to_csv.dart' as csv_export;
import 'package:shared_preferences/shared_preferences.dart';


class TeamPicker extends StatefulWidget {
  final String eventCode;
  final String eventName;
  final bool isCustomOnly;

  const TeamPicker({super.key, required this.eventCode, required this.eventName,this.isCustomOnly = false});

  @override
  State<TeamPicker> createState() => _TeamPickerState();
}

class _TeamPickerState extends State<TeamPicker> {
  List<String> teamNames = [];
  List<String> teamCodes = [];
  bool isLoading = true;
  String? errorMessage;

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

  Future<void> _exportData() async {
    List<String> header = [];
    header.add('Team Number');
    header.add('Drivetrain Type');
    header.add('Has Vision');
    header.add('Climb Level');
    header.add('Trenchable');
    header.add('Fuel Capacity');
    header.add('Bot Position');
    header.add('Auton Rundown');
    header.add('General Observations');

    List<List<String>> data = [];
    for (int i = 0; i < teamCodes.length; i++) {
      String generateKey(String field) {
        return '${teamCodes[i]}_${widget.eventCode}_$field';
      }
      SharedPreferences prefs = await SharedPreferences.getInstance();
      String? autonRundown = prefs.getString(generateKey('autonRundown'));
      String? botPosition = prefs.getString(generateKey('botPosition'));
      String? generalObservations = prefs.getString(generateKey('generalObservations'));
      String? driveTrainType = prefs.getString(generateKey('driveTrainType'));
      String? hasVision = prefs.getBool(generateKey('hasVision')).toString();
      String? climbLevel = prefs.getDouble(generateKey('climbLevel')).toString();
      String? trenchable = prefs.getBool(generateKey('trenchable')).toString();
      String? fuelCapacity = prefs.getDouble(generateKey('fuelCapacity')).toString();

      if (hasVision == 'null') {
        hasVision = '';
      }
      if (climbLevel == 'null') {
        climbLevel = '';
      }
      if (trenchable == 'null') {
        trenchable = '';
      }
      if (fuelCapacity == 'null') {
        fuelCapacity = '';
      }

      List<String> teamData = [];
      teamData.add(teamCodes[i]);
      teamData.add(driveTrainType ?? '');
      teamData.add(hasVision);
      teamData.add(climbLevel);
      teamData.add(trenchable);
      teamData.add(fuelCapacity);
      teamData.add(botPosition ?? '');
      teamData.add(autonRundown ?? '');
      teamData.add(generalObservations ?? '');
      data.add(teamData);
    }
    csv_export.myCSV(header, data, setHeadersInFirstRow: true, emptyRowsConfig: {1: 1}, fileName: 'laserscouter_${widget.eventCode}.csv');
  }

  Future<void> _fetchTeams() async {
    try {
      List<String> apiTeamNames = [];
      List<String> apiTeamCodes = [];

      if (!widget.isCustomOnly) {
        final EventSearchResult apiResult = await eventSearch(widget.eventCode);
        apiTeamNames = apiResult.teamNames;
        apiTeamCodes = apiResult.teamCodes;
      }

      final SharedPreferences prefs = await SharedPreferences.getInstance();
      final List<String> customTeamNames = prefs.getStringList('custom_team_names_${widget.eventName}') ?? [];
      final List<String> customTeamCodes = prefs.getStringList('custom_team_numbers_${widget.eventCode}') ?? [];

      List<String> combinedNames = [];
      List<String> combinedCodes = [];
      for (int i = 0; i < apiTeamCodes.length; i++) {
        if (!combinedCodes.contains(apiTeamCodes[i])) {
          combinedCodes.add(apiTeamCodes[i]);
          if (i < apiTeamNames.length) {
            combinedNames.add(apiTeamNames[i]);
          } else {
            combinedNames.add('');
          }
        }
      }
      for (int i = 0; i < customTeamCodes.length; i++) {
        if (!combinedCodes.contains(customTeamCodes[i])) {
          combinedCodes.add(customTeamCodes[i]);
          if (i < customTeamNames.length) {
            combinedNames.add(customTeamNames[i]);
          } else {
            combinedNames.add('');
          }
        }
      }

      if (mounted) {
        setState(() {
          teamNames = combinedNames.toList();
          teamCodes = combinedCodes.toList();
          isLoading = false;
        });
      }
    } catch (e) {
      if (mounted) {
        setState(() {
          errorMessage = widget.isCustomOnly
              ? "Could not load custom teams."
              : "Failed to load teams. Please try again.";
          isLoading = false;
        });
      }
    }
  }


  Future<void> _refreshTeams() async {
    setState(() {
      isLoading = true;
    });
    await _fetchTeams();
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Teams'),
        actions: [
          IconButton(
            onPressed: () async {
              await Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => TeamAdder(eventCode: widget.eventCode,),
                ),
              );
              _refreshTeams();
            },
            icon: Icon(Icons.add),
          )
        ]
      ),
      body: _buildBody(),
      floatingActionButton: FloatingActionButton(
        onPressed: _exportData,
        child: const Icon(Icons.share),
      ),
    );
  }

  Widget _buildBody() {
    if (isLoading) {
      return const Center(child: CircularProgressIndicator());
    }

    if (errorMessage != null) {
      return Center(
        child: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Text(
            errorMessage!,
            textAlign: TextAlign.center,
            style: Theme.of(context).textTheme.bodyLarge?.copyWith(
              color: Colors.red,
            ),
          ),
        ),
      );
    }

    if (teamCodes.isEmpty) {
      return const Center(
        child: Text('No teams found for this event.'),
      );
    }

    return ListView.builder(
      itemCount: teamCodes.length,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text('${teamCodes[index]} - ${teamNames[index]}'),
          onTap: () {
            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => NotesPage(
                  teamName: teamNames[index],
                  eventCode: widget.eventCode,
                  teamCode: teamCodes[index],
                ),
              ),
            );
          },
        );
      },
    );
  }
}