import "package:provider/provider.dart";
import "package:shadcn_flutter/shadcn_flutter.dart";

import "../providers/settings_provider.dart";
import "model_picker.dart";

class SettingsSheet extends StatelessWidget {
  const SettingsSheet();

  @override
  Widget build(BuildContext context) {
    return Consumer<SettingsProvider>(
      builder: (context, settingsProvider, _) {
        return Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text(
                "Settings",
                style: TextStyle(fontSize: 20, fontWeight: FontWeight.w600),
              ),
              const SizedBox(height: 16),

              // model picker
              const Text(
                "Model",
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
              ),
              const SizedBox(height: 8),
              const ModelPicker(),
              const SizedBox(height: 16),

              // API key setting
              const Text(
                "OpenRouter API Key",
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
              ),
              const SizedBox(height: 8),
              _ApiKeyInput(settingsProvider: settingsProvider),
              const SizedBox(height: 16),

              // theme setting
              const Text(
                "Theme",
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
              ),
              const SizedBox(height: 8),
              _SimpleDropdown<String>(
                value: settingsProvider.settings.theme,
                items: const ["dark", "light"],
                onChanged: (newTheme) {
                  settingsProvider.updateTheme(newTheme);
                },
              ),

              const SizedBox(height: 16),

              // effort level setting
              const Text(
                "Effort Level",
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
              ),
              const SizedBox(height: 8),
              _SimpleDropdown<String>(
                value: settingsProvider.settings.effortLevel ?? "medium",
                items: const ["low", "medium", "high", "max"],
                onChanged: (newLevel) {
                  settingsProvider.updateEffortLevel(newLevel);
                },
              ),

              const SizedBox(height: 24),

              // reset button
              Button.ghost(
                onPressed: () {
                  settingsProvider.resetToDefaults();
                  Navigator.pop(context);
                },
                child: const Text("Reset to Defaults"),
              ),
            ],
          ),
        );
      },
    );
  }
}

class _ApiKeyInput extends StatefulWidget {
  final SettingsProvider settingsProvider;

  const _ApiKeyInput({required this.settingsProvider});

  @override
  State<_ApiKeyInput> createState() => _ApiKeyInputState();
}

class _ApiKeyInputState extends State<_ApiKeyInput> {
  late TextEditingController _controller;
  bool _obscureText = true;

  @override
  void initState() {
    super.initState();
    _controller = TextEditingController(
      text: widget.settingsProvider.settings.openRouterApiKey ?? "",
    );
  }

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

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Expanded(
          child: TextField(
            controller: _controller,
            obscureText: _obscureText,
            onChanged: (value) {
              widget.settingsProvider.updateApiKey(value);
            },
            placeholder: const Text("sk-or-v1-..."),
          ),
        ),
        const SizedBox(width: 8),
        GestureDetector(
          onTap: () {
            setState(() {
              _obscureText = !_obscureText;
            });
          },
          child: Text(
            _obscureText ? "Show" : "Hide",
            style: const TextStyle(fontSize: 12, color: Color(0xFF999999)),
          ),
        ),
      ],
    );
  }
}

class _SimpleDropdown<T> extends StatelessWidget {
  final T value;
  final List<T> items;
  final Function(T) onChanged;

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

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () => _showMenu(context),
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
        decoration: BoxDecoration(
          border: Border.all(color: const Color(0xFFE2E8F0)),
          borderRadius: BorderRadius.circular(6),
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Text(value.toString()),
            const Text("▼", style: TextStyle(fontSize: 12)),
          ],
        ),
      ),
    );
  }

  void _showMenu(BuildContext context) {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: items
              .map((item) {
                final isSelected = item == value;
                return Container(
                  color: isSelected ? const Color(0xFFF1F5F9) : Colors.transparent,
                  child: GestureDetector(
                    onTap: () {
                      onChanged(item);
                      Navigator.pop(ctx);
                    },
                    child: Padding(
                      padding: const EdgeInsets.all(12),
                      child: Row(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          if (isSelected)
                            const Padding(
                              padding: EdgeInsets.only(right: 8),
                              child: Text("✓", style: TextStyle(fontWeight: FontWeight.bold)),
                            ),
                          Text(item.toString()),
                        ],
                      ),
                    ),
                  ),
                );
              })
              .toList(),
        ),
      ),
    );
  }
}