import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get/get.dart';

import '../models/filament_model.dart';

class AddFilamentDialog extends StatefulWidget {
  final FilamentModel? existingEntry;

  const AddFilamentDialog({super.key, this.existingEntry});

  static Future<FilamentModel?> show() {
    return Get.dialog<FilamentModel>(
      const AddFilamentDialog(),
      barrierColor: Colors.black.withValues(alpha: 0.55),
    );
  }

  static Future<FilamentModel?> showEdit({required FilamentModel entry}) {
    return Get.dialog<FilamentModel>(
      AddFilamentDialog(existingEntry: entry),
      barrierColor: Colors.black.withValues(alpha: 0.55),
    );
  }

  @override
  State<AddFilamentDialog> createState() => _AddFilamentDialogState();
}

class _AddFilamentDialogState extends State<AddFilamentDialog>
    with SingleTickerProviderStateMixin {
  final _formKey = GlobalKey<FormState>();

  final _nameCtrl = TextEditingController();
  final _colorCtrl = TextEditingController();
  final _weightCtrl = TextEditingController();
  final _weightUsedCtrl = TextEditingController();
  final _priceCtrl = TextEditingController();
  final _manufacturerCtrl = TextEditingController();
  final _notesCtrl = TextEditingController();
  final _printingTempCtrl = TextEditingController();
  final _bedTempCtrl = TextEditingController();

  String _selectedType = 'PLA';
  String _purchaseDate = '';

  late AnimationController _anim;
  late Animation<double> _fadeScale;

  static const _filamentTypes = [
    'PLA',
    'PETG',
    'ABS',
    'TPU',
    'ASA',
    'Nylon',
    'Resin',
    'Sonstiges',
  ];

  @override
  void initState() {
    super.initState();
    final e = widget.existingEntry;
    if (e != null) {
      _nameCtrl.text = e.name;
      _selectedType = _filamentTypes.contains(e.type) ? e.type : 'Sonstiges';
      _colorCtrl.text = e.color;
      _weightCtrl.text = e.weight.toString();
      _weightUsedCtrl.text = e.weightUsed.toString();
      _priceCtrl.text = e.price.toString();
      _manufacturerCtrl.text = e.manufacturer;
      _purchaseDate = e.purchaseDate;
      _notesCtrl.text = e.notes ?? '';
      _printingTempCtrl.text = e.printingTemp.toString();
      _bedTempCtrl.text = e.bedTemp.toString();
    } else {
      _purchaseDate = DateTime.now().toIso8601String().substring(0, 10);
      _weightCtrl.text = '1000';
      _weightUsedCtrl.text = '0';
      _printingTempCtrl.text = '210';
      _bedTempCtrl.text = '60';
    }
    _anim = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 220),
    );
    _fadeScale = CurvedAnimation(parent: _anim, curve: Curves.easeOutBack);
    _anim.forward();
  }

  @override
  void dispose() {
    for (final c in [
      _nameCtrl,
      _colorCtrl,
      _weightCtrl,
      _weightUsedCtrl,
      _priceCtrl,
      _manufacturerCtrl,
      _notesCtrl,
      _printingTempCtrl,
      _bedTempCtrl,
    ]) {
      c.dispose();
    }
    _anim.dispose();
    super.dispose();
  }

  Future<void> _pickDate() async {
    final initial = DateTime.tryParse(_purchaseDate) ?? DateTime.now();
    final picked = await showDatePicker(
      context: context,
      initialDate: initial,
      firstDate: DateTime(2000),
      lastDate: DateTime(2100),
      builder: (context, child) => Theme(
        data: Theme.of(context).copyWith(
          colorScheme: const ColorScheme.dark(
            primary: Color(0xFF7B9FFF),
            onSurface: Colors.white,
            surface: Color(0xFF1A2035),
          ),
        ),
        child: child!,
      ),
    );
    if (picked != null) {
      setState(() => _purchaseDate = picked.toIso8601String().substring(0, 10));
    }
  }

  void _submit() {
    if (!_formKey.currentState!.validate()) return;
    final entry = FilamentModel(
      documentId:
          widget.existingEntry?.documentId ??
          DateTime.now().millisecondsSinceEpoch.toString(),
      name: _nameCtrl.text.trim(),
      type: _selectedType,
      color: _colorCtrl.text.trim(),
      weight: double.tryParse(_weightCtrl.text.replaceAll(',', '.')) ?? 0,
      weightUsed:
          double.tryParse(_weightUsedCtrl.text.replaceAll(',', '.')) ?? 0,
      price: double.tryParse(_priceCtrl.text.replaceAll(',', '.')) ?? 0,
      manufacturer: _manufacturerCtrl.text.trim(),
      purchaseDate: _purchaseDate,
      notes: _notesCtrl.text.trim().isEmpty ? null : _notesCtrl.text.trim(),
      printingTemp: int.tryParse(_printingTempCtrl.text) ?? 0,
      bedTemp: int.tryParse(_bedTempCtrl.text) ?? 0,
    );
    Navigator.of(context).pop(entry);
  }

  @override
  Widget build(BuildContext context) {
    final isEdit = widget.existingEntry != null;

    return ScaleTransition(
      scale: _fadeScale,
      child: FadeTransition(
        opacity: _anim,
        child: Center(
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 480),
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 32),
              child: ClipRRect(
                borderRadius: BorderRadius.circular(24),
                child: BackdropFilter(
                  filter: ImageFilter.blur(sigmaX: 24, sigmaY: 24),
                  child: Material(
                    type: MaterialType.transparency,
                    child: Container(
                      decoration: BoxDecoration(
                        color: Colors.white.withValues(alpha: 0.1),
                        borderRadius: BorderRadius.circular(24),
                        border: Border.all(
                          color: Colors.white.withValues(alpha: 0.2),
                          width: 1,
                        ),
                      ),
                      child: Form(
                        key: _formKey,
                        child: SingleChildScrollView(
                          padding: const EdgeInsets.all(24),
                          child: Column(
                            mainAxisSize: MainAxisSize.min,
                            crossAxisAlignment: CrossAxisAlignment.stretch,
                            children: [
                              // ── Titel ──
                              Text(
                                isEdit
                                    ? 'Filament bearbeiten'
                                    : 'Neues Filament',
                                style: const TextStyle(
                                  color: Colors.white,
                                  fontSize: 20,
                                  fontWeight: FontWeight.bold,
                                ),
                              ),
                              const SizedBox(height: 20),

                              // ── Name ──
                              _GlassField(
                                controller: _nameCtrl,
                                label: 'Name',
                                validator: (v) => v == null || v.trim().isEmpty
                                    ? 'Pflichtfeld'
                                    : null,
                              ),
                              const SizedBox(height: 12),

                              // ── Typ Dropdown ──
                              _GlassDropdown(
                                value: _selectedType,
                                items: _filamentTypes,
                                label: 'Typ',
                                onChanged: (v) =>
                                    setState(() => _selectedType = v!),
                              ),
                              const SizedBox(height: 12),

                              // ── Farbe ──
                              _GlassField(
                                controller: _colorCtrl,
                                label: 'Farbe',
                                validator: (v) => v == null || v.trim().isEmpty
                                    ? 'Pflichtfeld'
                                    : null,
                              ),
                              const SizedBox(height: 12),

                              // ── Hersteller ──
                              _GlassField(
                                controller: _manufacturerCtrl,
                                label: 'Hersteller',
                                validator: (v) => v == null || v.trim().isEmpty
                                    ? 'Pflichtfeld'
                                    : null,
                              ),
                              const SizedBox(height: 12),

                              // ── Gewicht / Verbraucht ──
                              Row(
                                children: [
                                  Expanded(
                                    child: _GlassField(
                                      controller: _weightCtrl,
                                      label: 'Gewicht (g)',
                                      keyboardType:
                                          const TextInputType.numberWithOptions(
                                            decimal: true,
                                          ),
                                      validator: (v) =>
                                          double.tryParse(
                                                v?.replaceAll(',', '.') ?? '',
                                              ) ==
                                              null
                                          ? 'Ungültig'
                                          : null,
                                    ),
                                  ),
                                  const SizedBox(width: 12),
                                  Expanded(
                                    child: _GlassField(
                                      controller: _weightUsedCtrl,
                                      label: 'Verbraucht (g)',
                                      keyboardType:
                                          const TextInputType.numberWithOptions(
                                            decimal: true,
                                          ),
                                      validator: (v) =>
                                          double.tryParse(
                                                v?.replaceAll(',', '.') ?? '',
                                              ) ==
                                              null
                                          ? 'Ungültig'
                                          : null,
                                    ),
                                  ),
                                ],
                              ),
                              const SizedBox(height: 12),

                              // ── Preis / Kaufdatum ──
                              Row(
                                children: [
                                  Expanded(
                                    child: _GlassField(
                                      controller: _priceCtrl,
                                      label: 'Preis (€)',
                                      keyboardType:
                                          const TextInputType.numberWithOptions(
                                            decimal: true,
                                          ),
                                      validator: (v) =>
                                          double.tryParse(
                                                v?.replaceAll(',', '.') ?? '',
                                              ) ==
                                              null
                                          ? 'Ungültig'
                                          : null,
                                    ),
                                  ),
                                  const SizedBox(width: 12),
                                  Expanded(
                                    child: GestureDetector(
                                      onTap: _pickDate,
                                      child: Container(
                                        padding: const EdgeInsets.symmetric(
                                          horizontal: 14,
                                          vertical: 16,
                                        ),
                                        decoration: BoxDecoration(
                                          color: Colors.white.withValues(
                                            alpha: 0.08,
                                          ),
                                          borderRadius: BorderRadius.circular(
                                            12,
                                          ),
                                          border: Border.all(
                                            color: Colors.white.withValues(
                                              alpha: 0.2,
                                            ),
                                          ),
                                        ),
                                        child: Row(
                                          children: [
                                            Expanded(
                                              child: Text(
                                                _purchaseDate.isEmpty
                                                    ? 'Kaufdatum'
                                                    : _purchaseDate,
                                                style: TextStyle(
                                                  color: _purchaseDate.isEmpty
                                                      ? Colors.white38
                                                      : Colors.white,
                                                  fontSize: 14,
                                                ),
                                              ),
                                            ),
                                            const Icon(
                                              Icons.calendar_today_outlined,
                                              color: Colors.white54,
                                              size: 16,
                                            ),
                                          ],
                                        ),
                                      ),
                                    ),
                                  ),
                                ],
                              ),
                              const SizedBox(height: 12),

                              // ── Drucktemperatur / Betttemperatur ──
                              Row(
                                children: [
                                  Expanded(
                                    child: _GlassField(
                                      controller: _printingTempCtrl,
                                      label: 'Drucktemp. (°C)',
                                      keyboardType: TextInputType.number,
                                      inputFormatters: [
                                        FilteringTextInputFormatter.digitsOnly,
                                      ],
                                      validator: (v) =>
                                          int.tryParse(v ?? '') == null
                                          ? 'Ungültig'
                                          : null,
                                    ),
                                  ),
                                  const SizedBox(width: 12),
                                  Expanded(
                                    child: _GlassField(
                                      controller: _bedTempCtrl,
                                      label: 'Betttemp. (°C)',
                                      keyboardType: TextInputType.number,
                                      inputFormatters: [
                                        FilteringTextInputFormatter.digitsOnly,
                                      ],
                                      validator: (v) =>
                                          int.tryParse(v ?? '') == null
                                          ? 'Ungültig'
                                          : null,
                                    ),
                                  ),
                                ],
                              ),
                              const SizedBox(height: 12),

                              // ── Notizen (optional) ──
                              _GlassField(
                                controller: _notesCtrl,
                                label: 'Notizen (optional)',
                                maxLines: 3,
                              ),
                              const SizedBox(height: 24),

                              // ── Buttons ──
                              Row(
                                mainAxisAlignment: MainAxisAlignment.end,
                                children: [
                                  TextButton(
                                    onPressed: () =>
                                        Navigator.of(context).pop(),
                                    child: const Text(
                                      'Abbrechen',
                                      style: TextStyle(color: Colors.white60),
                                    ),
                                  ),
                                  const SizedBox(width: 12),
                                  ElevatedButton(
                                    onPressed: _submit,
                                    style: ElevatedButton.styleFrom(
                                      backgroundColor: const Color(0xFF7B9FFF),
                                      foregroundColor: Colors.white,
                                      shape: RoundedRectangleBorder(
                                        borderRadius: BorderRadius.circular(12),
                                      ),
                                    ),
                                    child: Text(
                                      isEdit ? 'Speichern' : 'Hinzufügen',
                                    ),
                                  ),
                                ],
                              ),
                            ],
                          ),
                        ),
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}

// ── Hilfs-Widgets ────────────────────────────────────────────────────────────

class _GlassField extends StatelessWidget {
  final TextEditingController controller;
  final String label;
  final int maxLines;
  final TextInputType? keyboardType;
  final List<TextInputFormatter>? inputFormatters;
  final String? Function(String?)? validator;

  const _GlassField({
    required this.controller,
    required this.label,
    this.maxLines = 1,
    this.keyboardType,
    this.inputFormatters,
    this.validator,
  });

  @override
  Widget build(BuildContext context) {
    return TextFormField(
      controller: controller,
      maxLines: maxLines,
      keyboardType: keyboardType,
      inputFormatters: inputFormatters,
      style: const TextStyle(color: Colors.white),
      validator: validator,
      decoration: InputDecoration(
        labelText: label,
        labelStyle: const TextStyle(color: Colors.white60),
        filled: true,
        fillColor: Colors.white.withValues(alpha: 0.08),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide(color: Colors.white.withValues(alpha: 0.2)),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide(color: Colors.white.withValues(alpha: 0.2)),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: Color(0xFF7B9FFF)),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: Color(0xFFFF6B6B)),
        ),
        focusedErrorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: Color(0xFFFF6B6B)),
        ),
      ),
    );
  }
}

class _GlassDropdown extends StatelessWidget {
  final String value;
  final List<String> items;
  final String label;
  final ValueChanged<String?> onChanged;

  const _GlassDropdown({
    required this.value,
    required this.items,
    required this.label,
    required this.onChanged,
  });

  @override
  Widget build(BuildContext context) {
    return DropdownButtonFormField<String>(
      initialValue: value,
      dropdownColor: const Color(0xFF1A2035),
      style: const TextStyle(color: Colors.white),
      decoration: InputDecoration(
        labelText: label,
        labelStyle: const TextStyle(color: Colors.white60),
        filled: true,
        fillColor: Colors.white.withValues(alpha: 0.08),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide(color: Colors.white.withValues(alpha: 0.2)),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: BorderSide(color: Colors.white.withValues(alpha: 0.2)),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(12),
          borderSide: const BorderSide(color: Color(0xFF7B9FFF)),
        ),
      ),
      items: items
          .map((t) => DropdownMenuItem(value: t, child: Text(t)))
          .toList(),
      onChanged: onChanged,
    );
  }
}