import 'dart:developer';

import 'package:fluffychat/config/app_config.dart';
import 'package:fluffychat/pangea/enum/construct_use_type_enum.dart';
import 'package:fluffychat/pangea/enum/span_data_type.dart';
import 'package:fluffychat/pangea/models/pangea_token_model.dart';
import 'package:fluffychat/pangea/models/span_data.dart';
import 'package:fluffychat/pangea/utils/bot_style.dart';
import 'package:fluffychat/pangea/utils/error_handler.dart';
import 'package:fluffychat/pangea/utils/match_copy.dart';
import 'package:fluffychat/pangea/widgets/animations/gain_points.dart';
import 'package:fluffychat/pangea/widgets/igc/card_error_widget.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';

import '../../../widgets/matrix.dart';
import '../../choreographer/widgets/choice_array.dart';
import '../../controllers/pangea_controller.dart';
import '../../enum/span_choice_type.dart';
import '../../models/span_card_model.dart';
import '../common/bot_face_svg.dart';
import 'card_header.dart';
import 'why_button.dart';

//switch for definition vs correction vs practice

//always show a title
//if description then show description
//choices then show choices
//

class SpanCard extends StatefulWidget {
  final PangeaController pangeaController = MatrixState.pangeaController;
  final SpanCardModel scm;
  final String roomId;

  SpanCard({
    super.key,
    required this.scm,
    required this.roomId,
  });

  @override
  State<SpanCard> createState() => SpanCardState();
}

class SpanCardState extends State<SpanCard> {
  Object? error;
  bool fetchingData = false;
  int? selectedChoiceIndex;

  BotExpression currentExpression = BotExpression.nonGold;

  //on initState, get SpanDetails
  @override
  void initState() {
    // debugger(when: kDebugMode);
    super.initState();
    getSpanDetails();
    fetchSelected();
  }

  //get selected choice
  SpanChoice? get selectedChoice {
    if (selectedChoiceIndex == null) return null;
    return choiceByIndex(selectedChoiceIndex!);
  }

  SpanChoice? choiceByIndex(int index) {
    if (widget.scm.pangeaMatch?.match.choices == null ||
        widget.scm.pangeaMatch!.match.choices!.length <= index) {
      return null;
    }
    return widget.scm.pangeaMatch?.match.choices?[index];
  }

  void fetchSelected() {
    if (widget.scm.pangeaMatch?.match.choices == null) {
      return;
    }
    if (selectedChoiceIndex == null) {
      DateTime? mostRecent;
      final numChoices = widget.scm.pangeaMatch!.match.choices!.length;
      for (int i = 0; i < numChoices; i++) {
        final choice = choiceByIndex(i);
        if (choice!.timestamp != null &&
            (mostRecent == null || choice.timestamp!.isAfter(mostRecent))) {
          mostRecent = choice.timestamp;
          selectedChoiceIndex = i;
        }
      }
    }
  }

  Future<void> getSpanDetails() async {
    try {
      if (widget.scm.pangeaMatch?.isITStart ?? false) return;

      if (!mounted) return;
      setState(() {
        fetchingData = true;
      });

      await widget.scm.choreographer.igc.spanDataController
          .getSpanDetails(widget.scm.matchIndex);

      if (mounted) {
        setState(() => fetchingData = false);
      }
    } catch (e, s) {
      // debugger(when: kDebugMode);
      ErrorHandler.logError(e: e, s: s);
      if (mounted) {
        setState(() {
          error = e;
          fetchingData = false;
        });
      }
    }
  }

  Future<void> onChoiceSelect(String value, int index) async {
    selectedChoiceIndex = index;
    if (selectedChoice != null) {
      if (!selectedChoice!.selected) {
        MatrixState.pangeaController.myAnalytics.addDraftUses(
          selectedChoice!.tokens,
          widget.roomId,
          selectedChoice!.isBestCorrection
              ? ConstructUseTypeEnum.corIGC
              : ConstructUseTypeEnum.incIGC,
        );
      }

      selectedChoice!.timestamp = DateTime.now();
      selectedChoice!.selected = true;
      setState(
        () => (selectedChoice!.isBestCorrection
            ? BotExpression.gold
            : BotExpression.surprised),
      );
    }
  }

  /// @ggurdin - this seems like it would be including the correct answer as well
  /// we only want to give this kind of points for ignored distractors
  /// Returns the list of choices that are not selected
  List<SpanChoice>? get ignoredMatches => widget.scm.pangeaMatch?.match.choices
      ?.where((choice) => !choice.selected)
      .toList();

  /// Returns the list of tokens from choices that are not selected
  List<PangeaToken>? get ignoredTokens => ignoredMatches
      ?.expand((choice) => choice.tokens)
      .toList()
      .cast<PangeaToken>();

  /// Adds the ignored tokens to locally cached analytics
  void addIgnoredTokenUses() {
    MatrixState.pangeaController.myAnalytics.addDraftUses(
      ignoredTokens ?? [],
      widget.roomId,
      ConstructUseTypeEnum.ignIGC,
    );
  }

  void onReplaceSelected() {
    addIgnoredTokenUses();
    widget.scm
        .onReplacementSelect(
          matchIndex: widget.scm.matchIndex,
          choiceIndex: selectedChoiceIndex!,
        )
        .then((value) => setState(() {}));
  }

  void onIgnoreMatch() {
    MatrixState.pAnyState.closeOverlay();
    addIgnoredTokenUses();

    Future.delayed(
      Duration.zero,
      () {
        widget.scm.onIgnore();
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return WordMatchContent(controller: this);
  }
}

class WordMatchContent extends StatelessWidget {
  final PangeaController pangeaController = MatrixState.pangeaController;
  final SpanCardState controller;

  WordMatchContent({
    required this.controller,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    if (controller.widget.scm.pangeaMatch == null) {
      return const SizedBox();
    }
    if (controller.error != null) {
      return CardErrorWidget(
        error: controller.error!,
        choreographer: controller.widget.scm.choreographer,
        offset: controller.widget.scm.pangeaMatch?.match.offset,
      );
    }

    final MatchCopy matchCopy = MatchCopy(
      context,
      controller.widget.scm.pangeaMatch!,
    );

    final ScrollController scrollController = ScrollController();

    try {
      return Stack(
        alignment: Alignment.topCenter,
        children: [
          const Positioned(
            top: 40,
            child: PointsGainedAnimation(),
          ),
          Column(
            children: [
              // if (!controller.widget.scm.pangeaMatch!.isITStart)
              CardHeader(
                text: controller.error?.toString() ?? matchCopy.title,
                botExpression: controller.error == null
                    ? controller.currentExpression
                    : BotExpression.addled,
              ),
              Expanded(
                child: Scrollbar(
                  controller: scrollController,
                  thumbVisibility: true,
                  child: SingleChildScrollView(
                    controller: scrollController,
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        // const SizedBox(height: 10.0),
                        // if (matchCopy.description != null)
                        //   Padding(
                        //     padding: const EdgeInsets.only(),
                        //     child: Text(
                        //       matchCopy.description!,
                        //       style: BotStyle.text(context),
                        //     ),
                        //   ),
                        const SizedBox(height: 8),
                        if (!controller.widget.scm.pangeaMatch!.isITStart)
                          ChoicesArray(
                            originalSpan:
                                controller.widget.scm.pangeaMatch!.matchContent,
                            isLoading: controller.fetchingData,
                            choices:
                                controller.widget.scm.pangeaMatch!.match.choices
                                    ?.map(
                                      (e) => Choice(
                                        text: e.value,
                                        color: e.selected ? e.type.color : null,
                                        isGold: e.type.name == 'bestCorrection',
                                      ),
                                    )
                                    .toList(),
                            onPressed: controller.onChoiceSelect,
                            uniqueKeyForLayerLink: (int index) =>
                                "wordMatch$index",
                            selectedChoiceIndex: controller.selectedChoiceIndex,
                          ),
                        const SizedBox(height: 12),
                        PromptAndFeedback(controller: controller),
                      ],
                    ),
                  ),
                ),
              ),
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  const SizedBox(width: 10),
                  Expanded(
                    child: Opacity(
                      opacity: 0.8,
                      child: TextButton(
                        style: ButtonStyle(
                          backgroundColor: WidgetStateProperty.all<Color>(
                            AppConfig.primaryColor.withOpacity(0.1),
                          ),
                        ),
                        onPressed: controller.onIgnoreMatch,
                        child: Center(
                          child: Text(L10n.of(context)!.ignoreInThisText),
                        ),
                      ),
                    ),
                  ),
                  const SizedBox(width: 10),
                  if (!controller.widget.scm.pangeaMatch!.isITStart)
                    Expanded(
                      child: Opacity(
                        opacity:
                            controller.selectedChoiceIndex != null ? 1.0 : 0.5,
                        child: TextButton(
                          onPressed: controller.selectedChoiceIndex != null
                              ? controller.onReplaceSelected
                              : null,
                          style: ButtonStyle(
                            backgroundColor: WidgetStateProperty.all<Color>(
                              (controller.selectedChoice != null
                                      ? controller.selectedChoice!.color
                                      : AppConfig.primaryColor)
                                  .withOpacity(0.2),
                            ),
                            // Outline if Replace button enabled
                            side: controller.selectedChoice != null
                                ? WidgetStateProperty.all(
                                    BorderSide(
                                      color: controller.selectedChoice!.color,
                                      style: BorderStyle.solid,
                                      width: 2.0,
                                    ),
                                  )
                                : null,
                          ),
                          child: Text(L10n.of(context)!.replace),
                        ),
                      ),
                    ),
                  const SizedBox(width: 10),
                  if (controller.widget.scm.pangeaMatch!.isITStart)
                    Expanded(
                      child: TextButton(
                        onPressed: () {
                          MatrixState.pAnyState.closeOverlay();
                          Future.delayed(
                            Duration.zero,
                            () => controller.widget.scm.onITStart(),
                          );
                        },
                        style: ButtonStyle(
                          backgroundColor: WidgetStateProperty.all<Color>(
                            (AppConfig.primaryColor).withOpacity(0.1),
                          ),
                        ),
                        child: Text(L10n.of(context)!.helpMeTranslate),
                      ),
                    ),
                ],
              ),
              if (controller.widget.scm.pangeaMatch!.isITStart)
                DontShowSwitchListTile(
                  controller: pangeaController,
                  onSwitch: (bool value) {
                    pangeaController.userController.updateProfile((profile) {
                      profile.userSettings.itAutoPlay = value;
                      return profile;
                    });
                  },
                ),
            ],
          ),
        ],
      );
    } on Exception catch (e) {
      debugger(when: kDebugMode);
      ErrorHandler.logError(e: e, s: StackTrace.current);
      rethrow;
    }
  }
}

class PromptAndFeedback extends StatelessWidget {
  const PromptAndFeedback({
    super.key,
    required this.controller,
  });

  final SpanCardState controller;

  @override
  Widget build(BuildContext context) {
    if (controller.widget.scm.pangeaMatch == null) {
      return const SizedBox();
    }

    return Container(
      constraints: controller.widget.scm.pangeaMatch!.isITStart
          ? null
          : const BoxConstraints(minHeight: 100),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          if (controller.selectedChoice == null && controller.fetchingData)
            const Center(
              child: SizedBox(
                width: 24.0,
                height: 24.0,
                child: CircularProgressIndicator(),
              ),
            ),
          if (controller.selectedChoice != null) ...[
            Text(
              controller.selectedChoice!.feedbackToDisplay(context),
              style: BotStyle.text(context),
            ),
            const SizedBox(height: 8),
            if (controller.selectedChoice?.feedback == null)
              WhyButton(
                onPress: () {
                  if (!controller.fetchingData) {
                    controller.getSpanDetails();
                  }
                },
                loading: controller.fetchingData,
              ),
          ],
          if (!controller.fetchingData &&
              controller.selectedChoiceIndex == null)
            Text(
              controller.widget.scm.pangeaMatch!.match.type.typeName
                  .defaultPrompt(context),
              style: BotStyle.text(context),
            ),
        ],
      ),
    );
  }
}

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

  @override
  _LoadingTextState createState() => _LoadingTextState();
}

class _LoadingTextState extends State<LoadingText>
    with SingleTickerProviderStateMixin {
  late final AnimationController _controller = AnimationController(
    duration: const Duration(seconds: 1),
    vsync: this,
  )..repeat();

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        Text(
          L10n.of(context)!.makingActivity,
          style: BotStyle.text(context),
        ),
        AnimatedBuilder(
          animation: _controller,
          builder: (BuildContext context, Widget? child) {
            return Text(
              _controller.isAnimating ? '.' * _controller.value.toInt() : '',
              style: BotStyle.text(context),
            );
          },
        ),
      ],
    );
  }

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

class StartITButton extends StatelessWidget {
  const StartITButton({
    super.key,
    required this.onITStart,
  });

  final void Function() onITStart;

  @override
  Widget build(BuildContext context) {
    return Material(
      type: MaterialType.transparency,
      child: ListTile(
        leading: const Icon(Icons.translate_outlined),
        title: Text(L10n.of(context)!.helpMeTranslate),
        onTap: () {
          MatrixState.pAnyState.closeOverlay();
          Future.delayed(Duration.zero, () => onITStart());
        },
      ),
    );
  }
}

class DontShowSwitchListTile extends StatefulWidget {
  final PangeaController controller;
  final Function(bool) onSwitch;

  const DontShowSwitchListTile({
    super.key,
    required this.controller,
    required this.onSwitch,
  });

  @override
  DontShowSwitchListTileState createState() => DontShowSwitchListTileState();
}

class DontShowSwitchListTileState extends State<DontShowSwitchListTile> {
  bool switchValue = false;

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

  @override
  Widget build(BuildContext context) {
    return SwitchListTile.adaptive(
      activeColor: AppConfig.activeToggleColor,
      title: Text(L10n.of(context)!.interactiveTranslatorAutoPlaySliderHeader),
      value: switchValue,
      onChanged: (value) {
        widget.onSwitch(value);
        setState(() => switchValue = value);
      },
    );
  }
}