import 'dart:developer';
import 'dart:io';

import 'package:easy_localization/easy_localization.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:intl/intl.dart';
import 'package:mohem_flutter_app/app_state/app_state.dart';
import 'package:mohem_flutter_app/classes/utils.dart';
import 'package:mohem_flutter_app/extensions/string_extensions.dart';
import 'package:mohem_flutter_app/generated/locale_keys.g.dart';
import 'package:mohem_flutter_app/widgets/button/default_button.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share_plus/share_plus.dart';

class MazayaAccessResultParams {
  final bool isGranted;
  final String dependentName;
  final String? dependentInitials;
  final String? downloadUrl;
  final String? nationalId;
  final String? dateOfBirth;

  const MazayaAccessResultParams({required this.isGranted, required this.dependentName, this.dependentInitials, this.downloadUrl, this.nationalId, this.dateOfBirth});
}

class _ShieldPainter extends CustomPainter {
  final Color color;
  final bool isGranted;

  _ShieldPainter({required this.color, required this.isGranted});

  @override
  void paint(Canvas canvas, Size size) {
    Paint paint =
        Paint()
          ..color = color
          ..style = PaintingStyle.stroke
          ..strokeWidth = 2.4
          ..strokeCap = StrokeCap.round
          ..strokeJoin = StrokeJoin.round;

    double w = size.width;
    double h = size.height;

    // Shield path
    Path path = Path();
    path.moveTo(w * 0.5, h * 0.1);
    path.cubicTo(w * 0.72, h * 0.1, w * 0.88, h * 0.18, w * 0.88, h * 0.38);
    path.cubicTo(w * 0.88, h * 0.65, w * 0.68, h * 0.84, w * 0.5, h * 0.92);
    path.cubicTo(w * 0.32, h * 0.84, w * 0.12, h * 0.65, w * 0.12, h * 0.38);
    path.cubicTo(w * 0.12, h * 0.18, w * 0.28, h * 0.1, w * 0.5, h * 0.1);
    path.close();

    canvas.drawPath(path, paint);

    if (isGranted) {
      // Checkmark path
      Path checkPath = Path();
      checkPath.moveTo(w * 0.34, h * 0.49);
      checkPath.lineTo(w * 0.46, h * 0.61);
      checkPath.lineTo(w * 0.66, h * 0.39);
      canvas.drawPath(checkPath, paint);
    } else {
      // Cross path
      canvas.drawLine(Offset(w * 0.38, h * 0.38), Offset(w * 0.62, h * 0.62), paint);
      canvas.drawLine(Offset(w * 0.62, h * 0.38), Offset(w * 0.38, h * 0.62), paint);
    }
  }

  @override
  bool shouldRepaint(covariant _ShieldPainter oldDelegate) => color != oldDelegate.color || isGranted != oldDelegate.isGranted;
}

class MazayaAccessResultScreen extends StatelessWidget {
  final bool isGranted;
  final String dependentName;
  final String? dependentInitials;
  final String? downloadUrl;
  final String? nationalId;
  final String? dateOfBirth;

  const MazayaAccessResultScreen({Key? key, this.isGranted = true, this.dependentName = "", this.dependentInitials, this.downloadUrl, this.nationalId, this.dateOfBirth}) : super(key: key);

  static String getDownloadLink() {
    int channel = AppState().postParamsObject?.channel ?? 31;
    return channel == 33 ? "https://mohemm.hmg.com/mhmg.html" : "https://mohemm.hmg.com/mohem.html";
  }

  // Channel 33 (HMG) gets the HMG-branded guide, everything else gets the CS-branded one -
  // same channel check as getDownloadLink() - crossed with the current app language.
  static String getShareGuidePdfAssetPath(bool isAr) {
    int channel = AppState().postParamsObject?.channel ?? 31;
    String brand = channel == 33 ? "HMG" : "CS";
    String lang = isAr ? "ar" : "en";
    return "assets/pdf/Mazaya Access Guide $brand $lang.pdf";
  }

  String _getInitials(String? name) {
    if (name == null || name.trim().isEmpty) return "D";
    List<String> parts = name.trim().split(RegExp(r'\s+')).where((String p) => p.isNotEmpty).toList();
    if (parts.isEmpty) return "D";
    if (parts.length == 1) {
      return parts.first.length >= 2 ? parts.first.substring(0, 2).toUpperCase() : parts.first.toUpperCase();
    }
    return "${parts.first[0]}${parts.last[0]}".toUpperCase();
  }

  @override
  Widget build(BuildContext context) {
    bool isAr = AppState().isArabic(context);
    String fontFamily = isAr ? 'Cairo' : 'Poppins';

    // Resolve arguments if passed via ModalRoute
    Object? routeArgs = ModalRoute.of(context)?.settings.arguments;
    bool effectiveGranted = isGranted;
    String effectiveName = dependentName;
    String? effectiveInitials = dependentInitials;
    String? effectiveUrl = downloadUrl;
    String? effectiveNationalId = nationalId;
    String? effectiveDateOfBirth = dateOfBirth;

    if (routeArgs is MazayaAccessResultParams) {
      effectiveGranted = routeArgs.isGranted;
      effectiveName = routeArgs.dependentName;
      effectiveInitials = routeArgs.dependentInitials;
      effectiveUrl = routeArgs.downloadUrl;
      effectiveNationalId = routeArgs.nationalId;
      effectiveDateOfBirth = routeArgs.dateOfBirth;
    } else if (routeArgs is Map<String, dynamic>) {
      effectiveGranted = routeArgs['isGranted'] ?? isGranted;
      effectiveName = routeArgs['dependentName'] ?? dependentName;
      effectiveInitials = routeArgs['dependentInitials'] ?? dependentInitials;
      effectiveUrl = routeArgs['downloadUrl'] ?? downloadUrl;
      effectiveNationalId = routeArgs['nationalId'] ?? nationalId;
      effectiveDateOfBirth = routeArgs['dateOfBirth'] ?? dateOfBirth;
    }

    if (effectiveName.trim().isEmpty) {
      String fallback = AppState().dependentName ?? "";
      if (fallback.isNotEmpty) {
        effectiveName = fallback;
      } else {
        effectiveName = isAr ? "التابع" : "Dependent";
      }
    }

    String linkToShare = effectiveUrl ?? getDownloadLink();
    String initials = effectiveInitials ?? _getInitials(effectiveName);

    return Scaffold(
      backgroundColor: Colors.white,
      appBar: PreferredSize(
        preferredSize: const Size.fromHeight(56),
        child: SafeArea(
          child: Container(
            height: 56,
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: Row(
              children: <Widget>[
                InkWell(
                  borderRadius: BorderRadius.circular(20),
                  onTap: () => Navigator.pop(context),
                  child: const Padding(padding: EdgeInsets.all(8.0), child: Icon(Icons.arrow_back_ios_new_rounded, size: 20, color: Color(0xFF1E293B))),
                ),
                const SizedBox(width: 4),
                LocaleKeys.mazayaTitle.tr().toText20(isBold: true, color: const Color(0xFF1E293B)),
                const Spacer(),
                InkWell(
                  borderRadius: BorderRadius.circular(20),
                  onTap: () => Navigator.pop(context),
                  child: const Padding(padding: EdgeInsets.all(8.0), child: Icon(Icons.close_rounded, size: 24, color: Color(0xFF1E293B))),
                ),
              ],
            ),
          ),
        ),
      ),
      body: SafeArea(
        child: Column(
          children: <Widget>[
            Expanded(
              child: SingleChildScrollView(
                padding: const EdgeInsets.fromLTRB(20, 16, 20, 20),
                child:
                    effectiveGranted ? _buildGrantedContent(context, isAr, fontFamily, effectiveName, initials, linkToShare) : _buildRevokedContent(context, isAr, fontFamily, effectiveName, initials),
              ),
            ),
            _buildBottomButtons(context, isAr, fontFamily, effectiveGranted, linkToShare, effectiveNationalId ?? "", effectiveDateOfBirth ?? ""),
          ],
        ),
      ),
    );
  }

  Widget _buildGrantedContent(BuildContext context, bool isAr, String fontFamily, String name, String initials, String linkToShare) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.center,
      children: <Widget>[
        const SizedBox(height: 8),

        // Shield checkmark badge
        Container(
          width: 80,
          height: 80,
          decoration: const BoxDecoration(color: Color(0xFFE6F7F2), shape: BoxShape.circle),
          child: Center(child: CustomPaint(size: const Size(40, 40), painter: _ShieldPainter(color: const Color(0xFF168A89), isGranted: true))),
        ),

        const SizedBox(height: 18),

        // Title
        LocaleKeys.mazayaAccessGranted.tr().toText22(isBold: true, isCentered: true, color: const Color(0xFF1E293B)),

        const SizedBox(height: 8),

        // Description
        LocaleKeys.mazayaAccessGrantedDesc.tr(args: <String>[name]).toText14(isCenter: true, color: const Color(0xFF64748B)),

        const SizedBox(height: 22),

        // Access is now active banner
        Container(
          width: double.infinity,
          padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
          decoration: BoxDecoration(color: const Color(0xFFE8F8F0), borderRadius: BorderRadius.circular(14), border: Border.all(color: const Color(0xFFCEEFE7), width: 1)),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              const Padding(padding: EdgeInsets.only(top: 2), child: Icon(Icons.check_circle_outline_rounded, color: Color(0xFF168A89), size: 20)),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    LocaleKeys.accessIsNowActive.tr().toText14(isBold: true, color: const Color(0xFF168A89)),
                    const SizedBox(height: 3),
                    LocaleKeys.accessIsNowActiveDesc.tr(args: <String>[name]).toText12(color: const Color(0xFF64748B)),
                  ],
                ),
              ),
            ],
          ),
        ),

        const SizedBox(height: 14),

        // Dependent Card
        Container(
          width: double.infinity,
          padding: const EdgeInsets.all(14),
          decoration: BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.circular(14),
            border: Border.all(color: const Color(0xFFF1F5F9)),
            boxShadow: const <BoxShadow>[BoxShadow(color: Color(0x08000000), blurRadius: 10, offset: Offset(0, 3))],
          ),
          child: Row(
            children: <Widget>[
              Container(
                width: 42,
                height: 42,
                decoration: const BoxDecoration(color: Color(0xFFE6F7F2), shape: BoxShape.circle),
                child: Center(child: initials.toText14(isBold: true, color: const Color(0xFF168A89))),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    name.toText14(isBold: true, maxlines: 1, color: const Color(0xFF1E293B)),
                    const SizedBox(height: 2),
                    LocaleKeys.dependentAccessActive.tr().toText12(isBold: true, color: const Color(0xFF168A89)),
                  ],
                ),
              ),
              const Icon(Icons.lock_open_rounded, color: Color(0xFF168A89), size: 20),
            ],
          ),
        ),

        const SizedBox(height: 14),

        // Shareable App-Download Link Card
        Container(
          width: double.infinity,
          padding: const EdgeInsets.all(14),
          decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(14), border: Border.all(color: const Color(0xFFE2E8F0))),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  Container(
                    width: 36,
                    height: 36,
                    decoration: BoxDecoration(color: const Color(0xFFE8F8F0), borderRadius: BorderRadius.circular(10)),
                    child: const Center(child: Icon(Icons.smartphone_rounded, color: Color(0xFF168A89), size: 20)),
                  ),
                  const SizedBox(width: 10),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: <Widget>[
                        LocaleKeys.shareableAppDownloadLink.tr().toText14(isBold: true, color: const Color(0xFF1E293B)),
                        const SizedBox(height: 2),
                        LocaleKeys.shareableAppDownloadLinkDesc.tr(args: <String>[name]).toText12(color: const Color(0xFF64748B)),
                      ],
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 12),
              Container(
                width: double.infinity,
                padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 9),
                decoration: BoxDecoration(color: const Color(0xFFF8FAFC), borderRadius: BorderRadius.circular(10), border: Border.all(color: const Color(0xFFE2E8F0))),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    LocaleKeys.downloadLink.tr().toText11(isBold: true, color: const Color(0xFF168A89)),
                    const SizedBox(height: 3),
                    linkToShare.toText12(maxLine: 1, color: const Color(0xFF334155)),
                  ],
                ),
              ),
            ],
          ),
        ),
      ],
    );
  }

  Widget _buildRevokedContent(BuildContext context, bool isAr, String fontFamily, String name, String initials) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.center,
      children: <Widget>[
        const SizedBox(height: 8),

        // Shield bad badge
        Container(
          width: 80,
          height: 80,
          decoration: const BoxDecoration(color: Color(0xFFFEECEB), shape: BoxShape.circle),
          child: Center(child: CustomPaint(size: const Size(40, 40), painter: _ShieldPainter(color: const Color(0xFFED1C24), isGranted: false))),
        ),

        const SizedBox(height: 18),

        // Title
        LocaleKeys.mazayaAccessRevoked.tr().toText22(isBold: true, isCentered: true, color: const Color(0xFF1E293B)),

        const SizedBox(height: 8),

        // Description
        LocaleKeys.mazayaAccessRevokedDesc.tr().toText14(isCenter: true, color: const Color(0xFF64748B)),

        const SizedBox(height: 22),

        // Contact your sponsor banner
        Container(
          width: double.infinity,
          padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
          decoration: BoxDecoration(color: const Color(0xFFFFF5F5), borderRadius: BorderRadius.circular(14), border: Border.all(color: const Color(0xFFFFCDD2), width: 1)),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              const Padding(padding: EdgeInsets.only(top: 2), child: Icon(Icons.phone_outlined, color: Color(0xFFED1C24), size: 20)),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    LocaleKeys.contactYourSponsor.tr().toText14(isBold: true, color: const Color(0xFFED1C24)),
                    const SizedBox(height: 3),
                    LocaleKeys.contactYourSponsorDesc.tr().toText12(color: const Color(0xFF64748B)),
                  ],
                ),
              ),
            ],
          ),
        ),

        const SizedBox(height: 14),

        // Dependent Card
        Container(
          width: double.infinity,
          padding: const EdgeInsets.all(14),
          decoration: BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.circular(14),
            border: Border.all(color: const Color(0xFFF1F5F9)),
            boxShadow: const <BoxShadow>[BoxShadow(color: Color(0x08000000), blurRadius: 10, offset: Offset(0, 3))],
          ),
          child: Row(
            children: <Widget>[
              Container(
                width: 42,
                height: 42,
                decoration: const BoxDecoration(color: Color(0xFFFFF1F0), shape: BoxShape.circle),
                child: Center(child: initials.toText14(isBold: true, color: const Color(0xFFED1C24))),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    name.toText14(isBold: true, maxlines: 1, color: const Color(0xFF1E293B)),
                    const SizedBox(height: 2),
                    LocaleKeys.dependentAccessBlocked.tr().toText12(isBold: true, color: const Color(0xFFED1C24)),
                  ],
                ),
              ),
              const Icon(Icons.lock_outline_rounded, color: Color(0xFFED1C24), size: 20),
            ],
          ),
        ),
      ],
    );
  }

  // Display-only DOB formatting for the share message: "dd-MM-yyyy", no time component.
  // The raw value can come in as the API's "/Date(ms+tz)/" wrapper or a plain ISO datetime string
  // with a time component - either way we only want the date part.
  String _formatDob(String raw) {
    String s = raw.trim();
    if (s.isEmpty) return "";

    try {
      RegExp aspNetDateRegex = RegExp(r'/Date\((-?\d+)([+-]\d{4})?\)/');
      Match? match = aspNetDateRegex.firstMatch(s);
      if (match != null) {
        int ms = int.parse(match.group(1)!);
        return DateFormat('dd-MM-yyyy').format(DateTime.fromMillisecondsSinceEpoch(ms, isUtc: true));
      }

      DateTime? parsed = DateTime.tryParse(s);
      if (parsed != null) {
        return DateFormat('dd-MM-yyyy').format(parsed);
      }
    } catch (_) {}

    // Fallback: strip a time component off a plain "yyyy-MM-dd HH:mm:ss" / "yyyy-MM-ddTHH:mm:ss"
    // string we couldn't otherwise parse, rather than showing it as-is with the time attached.
    if (s.contains('T')) return s.split('T').first;
    if (s.contains(' ')) return s.split(' ').first;
    return s;
  }

  // Same message built for both "Share Download Link" and "Copy Link" - they must always
  // carry identical content, so this is the single source of truth for it.
  String _buildMazayaInviteMessage(String linkToShare, String nationalId, String dateOfBirth) {
    String nationalIdLine = nationalId.trim().isEmpty ? LocaleKeys.nationalIdOrIqamaFallback.tr() : "${LocaleKeys.nationalId.tr()}: $nationalId";
    return "$linkToShare\n\n${LocaleKeys.mazayaInviteInstructions.tr()}\n\n$nationalIdLine\n${LocaleKeys.dateOfBirth.tr()}: ${_formatDob(dateOfBirth)}";
  }

  // Shares the invite text together with the language-appropriate steps PDF from assets.
  // Falls back to sharing just the text if the PDF can't be loaded/copied for any reason.
  Future<void> _shareMazayaInvite(bool isAr, String linkToShare, String nationalId, String dateOfBirth) async {
    String message = _buildMazayaInviteMessage(linkToShare, nationalId, dateOfBirth);

    try {
      ByteData bytes = await rootBundle.load(getShareGuidePdfAssetPath(isAr));
      Directory tempDir = await getTemporaryDirectory();
      // Write to a space-free filename locally - the asset path above is what actually matters.
      String localFileName = isAr ? "mazaya_access_guide_ar.pdf" : "mazaya_access_guide_en.pdf";
      File pdfFile = File('${tempDir.path}/$localFileName');
      await pdfFile.writeAsBytes(bytes.buffer.asUint8List(bytes.offsetInBytes, bytes.lengthInBytes));

      log("final: $message\n\nfile: ${pdfFile.path}");
      await SharePlus.instance.share(ShareParams(text: message, files: [XFile(pdfFile.path)]));
    } catch (_) {
      try {
        await SharePlus.instance.share(ShareParams(text: message));
      } catch (_) {}
    }
  }

  Widget _buildBottomButtons(BuildContext context, bool isAr, String fontFamily, bool granted, String linkToShare, String nationalId, String dateOfBirth) {
    if (granted) {
      return Container(
        color: Colors.white,
        padding: const EdgeInsets.fromLTRB(20, 10, 20, 20),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            DefaultButton(
              LocaleKeys.shareDownloadLink.tr(),
              () => _shareMazayaInvite(isAr, linkToShare, nationalId, dateOfBirth),
              trailingIconData: isAr ? Icons.arrow_back_rounded : Icons.arrow_forward_rounded,
              fontSize: 14,
              isTextExpanded: false,
              height: 48,
              borderRadius: 12,
            ),
            const SizedBox(height: 10),
            DefaultButton(
              LocaleKeys.copyLink.tr(),
              () {
                Clipboard.setData(ClipboardData(text: _buildMazayaInviteMessage(linkToShare, nationalId, dateOfBirth)));
                Utils.showToast(LocaleKeys.linkCopied.tr());
              },
              colors: const <Color>[Colors.white, Colors.white],
              border: Border.all(color: const Color(0xFFCBD5E1)),
              textColor: const Color(0xFF168A89),
              fontSize: 14,
              isTextExpanded: false,
              height: 48,
              borderRadius: 12,
            ),
            const SizedBox(height: 10),
            DefaultButton(
              LocaleKeys.done.tr(),
              () => Navigator.pop(context),
              colors: const <Color>[Colors.white, Colors.white],
              border: Border.all(color: const Color(0xFFCBD5E1)),
              textColor: const Color(0xFF334155),
              fontSize: 14,
              isTextExpanded: false,
              height: 48,
              borderRadius: 12,
            ),
          ],
        ),
      );
    } else {
      return Container(
        color: Colors.white,
        padding: const EdgeInsets.fromLTRB(20, 10, 20, 20),
        child: DefaultButton(
          LocaleKeys.returnToSignIn.tr(),
          () => Navigator.pop(context),
          colors: const <Color>[Colors.white, Colors.white],
          border: Border.all(color: const Color(0xFFCEEFE7), width: 1.2),
          textColor: const Color(0xFF168A89),
          iconData: isAr ? Icons.arrow_forward_rounded : Icons.arrow_back_rounded,
          fontSize: 14,
          isTextExpanded: false,
          height: 48,
          borderRadius: 12,
        ),
      );
    }
  }
}