import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http_parser/http_parser.dart';
import 'package:lottie/lottie.dart';
import 'package:apidash/utils/utils.dart';
import 'package:apidash/widgets/widgets.dart';
import 'package:apidash/models/models.dart';
import 'package:apidash/consts.dart';

class NotSentWidget extends StatelessWidget {
  const NotSentWidget({super.key});

  @override
  Widget build(BuildContext context) {
    final color = Theme.of(context).colorScheme.secondary;
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(
            Icons.north_east_rounded,
            size: 40,
            color: color,
          ),
          Text(
            'Not Sent',
            style:
                Theme.of(context).textTheme.titleMedium?.copyWith(color: color),
          ),
        ],
      ),
    );
  }
}

class SendingWidget extends StatelessWidget {
  const SendingWidget({super.key});

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Lottie.asset("assets/sending.json"),
        ],
      ),
    );
  }
}

class ResponsePaneHeader extends StatefulWidget {
  const ResponsePaneHeader({
    super.key,
    this.responseStatus,
    this.message,
    this.time,
  });

  final int? responseStatus;
  final String? message;
  final Duration? time;
  @override
  State<ResponsePaneHeader> createState() => _ResponsePaneHeaderState();
}

class _ResponsePaneHeaderState extends State<ResponsePaneHeader> {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: kPh20v10,
      child: SizedBox(
        height: kHeaderHeight,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Text.rich(
              TextSpan(
                children: [
                  const TextSpan(
                    text: "Response (",
                  ),
                  TextSpan(
                    text: "${widget.responseStatus}",
                    style: TextStyle(
                      color: getResponseStatusCodeColor(
                        widget.responseStatus,
                        brightness: Theme.of(context).brightness,
                      ),
                      fontFamily: kCodeStyle.fontFamily,
                    ),
                  ),
                  const TextSpan(
                    text: ")",
                  ),
                ],
                style: Theme.of(context).textTheme.titleMedium,
              ),
            ),
            kHSpacer20,
            Expanded(
              child: Text(
                widget.message ?? "",
                softWrap: false,
                overflow: TextOverflow.ellipsis,
                style: Theme.of(context).textTheme.titleMedium!.copyWith(
                      fontFamily: kCodeStyle.fontFamily,
                      color: getResponseStatusCodeColor(
                        widget.responseStatus,
                        brightness: Theme.of(context).brightness,
                      ),
                    ),
              ),
            ),
            kHSpacer20,
            Text(
              humanizeDuration(widget.time),
              style: Theme.of(context).textTheme.titleMedium!.copyWith(
                    fontFamily: kCodeStyle.fontFamily,
                    color: Theme.of(context).colorScheme.secondary,
                  ),
            ),
          ],
        ),
      ),
    );
  }
}

class ResponseTabView extends StatefulWidget {
  const ResponseTabView({
    super.key,
    this.activeId,
    required this.children,
  });

  final String? activeId;
  final List<Widget> children;
  @override
  State<ResponseTabView> createState() => _ResponseTabViewState();
}

class _ResponseTabViewState extends State<ResponseTabView>
    with TickerProviderStateMixin {
  late final TabController _controller;

  @override
  void initState() {
    super.initState();
    _controller = TabController(
      length: 2,
      animationDuration: kTabAnimationDuration,
      vsync: this,
    );
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        TabBar(
          key: Key(widget.activeId!),
          controller: _controller,
          overlayColor: kColorTransparentState,
          onTap: (index) {},
          tabs: const [
            SizedBox(
              height: kTabHeight,
              child: Center(
                child: Text(
                  'Body',
                  textAlign: TextAlign.center,
                  overflow: TextOverflow.fade,
                  softWrap: false,
                  style: kTextStyleButton,
                ),
              ),
            ),
            SizedBox(
              height: kTabHeight,
              child: Center(
                child: Text(
                  'Headers',
                  textAlign: TextAlign.center,
                  overflow: TextOverflow.fade,
                  style: kTextStyleButton,
                ),
              ),
            ),
          ],
        ),
        Expanded(
          child: TabBarView(
            controller: _controller,
            physics: const NeverScrollableScrollPhysics(),
            children: widget.children,
          ),
        ),
      ],
    );
  }

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

class ResponseHeadersHeader extends StatefulWidget {
  const ResponseHeadersHeader({
    super.key,
    required this.map,
    required this.name,
  });

  final Map map;
  final String name;
  @override
  State<ResponseHeadersHeader> createState() => _ResponseHeadersHeaderState();
}

class _ResponseHeadersHeaderState extends State<ResponseHeadersHeader> {
  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: kHeaderHeight,
      child: Row(
        children: [
          Expanded(
            child: Text(
              "${widget.name} (${widget.map.length} items)",
              style: Theme.of(context).textTheme.labelLarge!.copyWith(
                    fontWeight: FontWeight.bold,
                  ),
            ),
          ),
          if (widget.map.isNotEmpty)
            CopyButton(
              toCopy: kEncoder.convert(widget.map),
            ),
        ],
      ),
    );
  }
}

const kHeaderRow = ["Header Name", "Header Value"];

class ResponseHeaders extends StatefulWidget {
  const ResponseHeaders({
    super.key,
    required this.responseHeaders,
    required this.requestHeaders,
  });

  final Map responseHeaders;
  final Map requestHeaders;
  @override
  State<ResponseHeaders> createState() => _ResponseHeadersState();
}

class _ResponseHeadersState extends State<ResponseHeaders> {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: kPh20v5,
      child: ListView(
        children: [
          ResponseHeadersHeader(
            map: widget.responseHeaders,
            name: "Response Headers",
          ),
          if (widget.responseHeaders.isNotEmpty) kVSpacer5,
          if (widget.responseHeaders.isNotEmpty)
            MapTable(
              map: widget.responseHeaders,
              colNames: kHeaderRow,
              firstColumnHeaderCase: true,
            ),
          kVSpacer10,
          ResponseHeadersHeader(
            map: widget.requestHeaders,
            name: "Request Headers",
          ),
          if (widget.requestHeaders.isNotEmpty) kVSpacer5,
          if (widget.requestHeaders.isNotEmpty)
            MapTable(
              map: widget.requestHeaders,
              colNames: kHeaderRow,
              firstColumnHeaderCase: true,
            ),
        ],
      ),
    );
  }
}

class ResponseBody extends StatefulWidget {
  const ResponseBody({
    super.key,
    this.activeRequestModel,
  });

  final RequestModel? activeRequestModel;
  @override
  State<ResponseBody> createState() => _ResponseBodyState();
}

class _ResponseBodyState extends State<ResponseBody> {
  @override
  Widget build(BuildContext context) {
    final responseModel = widget.activeRequestModel?.responseModel;
    if (responseModel == null) {
      return const ErrorMessage(
          message:
              'Error: Response data does not exist. $kUnexpectedRaiseIssue');
    }

    var body = responseModel.body;
    var formattedBody = responseModel.formattedBody;
    if (body == null) {
      return const ErrorMessage(
          message: 'Response body is missing (null). $kUnexpectedRaiseIssue');
    }
    if (body.isEmpty) {
      return const ErrorMessage(
        message: 'No content',
        showIcon: false,
        showIssueButton: false,
      );
    }

    var mediaType = responseModel.mediaType;
    if (mediaType == null) {
      return ErrorMessage(
          message:
              'Unknown Response Content-Type - ${responseModel.contentType}. $kUnexpectedRaiseIssue');
    }

    var responseBodyView = getResponseBodyViewOptions(mediaType);
    var options = responseBodyView.$0;
    var highlightLanguage = responseBodyView.$1;

    if (formattedBody == null) {
      options = [...options];
      options.remove(ResponseBodyView.code);
    }

    return BodySuccess(
      key: Key("${widget.activeRequestModel!.id}-response"),
      mediaType: mediaType,
      options: options,
      bytes: responseModel.bodyBytes!,
      body: body,
      formattedBody: formattedBody,
      highlightLanguage: highlightLanguage,
    );
  }
}

class BodySuccess extends StatefulWidget {
  const BodySuccess(
      {super.key,
      required this.mediaType,
      required this.body,
      required this.options,
      required this.bytes,
      this.formattedBody,
      this.highlightLanguage});
  final MediaType mediaType;
  final List<ResponseBodyView> options;
  final String body;
  final Uint8List bytes;
  final String? formattedBody;
  final String? highlightLanguage;
  @override
  State<BodySuccess> createState() => _BodySuccessState();
}

class _BodySuccessState extends State<BodySuccess> {
  int segmentIdx = 0;

  @override
  Widget build(BuildContext context) {
    var currentSeg = widget.options[segmentIdx];
    var codeTheme = Theme.of(context).brightness == Brightness.light
        ? kLightCodeTheme
        : kDarkCodeTheme;
    final textContainerdecoration = BoxDecoration(
      color: Color.alphaBlend(
          (Theme.of(context).brightness == Brightness.dark
                  ? Theme.of(context).colorScheme.onPrimaryContainer
                  : Theme.of(context).colorScheme.primaryContainer)
              .withOpacity(kForegroundOpacity),
          Theme.of(context).colorScheme.surface),
      border: Border.all(color: Theme.of(context).colorScheme.surfaceVariant),
      borderRadius: kBorderRadius8,
    );

    return LayoutBuilder(
      builder: (BuildContext context, BoxConstraints constraints) {
        var showLabel = showButtonLabelsInBodySuccess(
          widget.options.length,
          constraints.maxWidth,
        );
        return Padding(
          padding: kP10,
          child: Column(
            children: [
              Row(
                children: [
                  (widget.options == kRawBodyViewOptions)
                      ? const SizedBox()
                      : SegmentedButton<ResponseBodyView>(
                          selectedIcon: Icon(
                              kResponseBodyViewIcons[currentSeg]![kKeyIcon]),
                          segments: widget.options
                              .map<ButtonSegment<ResponseBodyView>>(
                                (e) => ButtonSegment<ResponseBodyView>(
                                  value: e,
                                  label: Text(
                                      kResponseBodyViewIcons[e]![kKeyName]),
                                  icon: Icon(
                                      kResponseBodyViewIcons[e]![kKeyIcon]),
                                ),
                              )
                              .toList(),
                          selected: {currentSeg},
                          onSelectionChanged: (newSelection) {
                            setState(() {
                              segmentIdx =
                                  widget.options.indexOf(newSelection.first);
                            });
                          },
                        ),
                  const Spacer(),
                  kCodeRawBodyViewOptions.contains(currentSeg)
                      ? CopyButton(
                          toCopy: widget.body,
                          showLabel: showLabel,
                        )
                      : const SizedBox(),
                  SaveInDownloadsButton(
                    content: widget.bytes,
                    mimeType: widget.mediaType.mimeType,
                    showLabel: showLabel,
                  ),
                ],
              ),
              kVSpacer10,
              Visibility(
                visible: currentSeg == ResponseBodyView.preview ||
                    currentSeg == ResponseBodyView.none,
                child: Expanded(
                  child: Previewer(
                    bytes: widget.bytes,
                    type: widget.mediaType.type,
                    subtype: widget.mediaType.subtype,
                    hasRaw: widget.options.contains(ResponseBodyView.raw),
                  ),
                ),
              ),
              if (widget.formattedBody != null)
                Visibility(
                  visible: currentSeg == ResponseBodyView.code,
                  child: Expanded(
                    child: Container(
                      width: double.maxFinite,
                      padding: kP8,
                      decoration: textContainerdecoration,
                      child: CodePreviewer(
                        code: widget.formattedBody!,
                        theme: codeTheme,
                        language: widget.highlightLanguage,
                        textStyle: kCodeStyle,
                      ),
                    ),
                  ),
                ),
              Visibility(
                visible: currentSeg == ResponseBodyView.raw,
                child: Expanded(
                  child: Container(
                    width: double.maxFinite,
                    padding: kP8,
                    decoration: textContainerdecoration,
                    child: SingleChildScrollView(
                      child: SelectableText(
                        widget.body,
                        style: kCodeStyle,
                      ),
                    ),
                  ),
                ),
              ),
            ],
          ),
        );
      },
    );
  }
}