import React, { useEffect, useState } from 'react';
import { useNavigate } from 'react-router-dom';

import './App.css';
import TextField from '@mui/material/TextField';
import Select from '@mui/material/Select';
import MenuItem from '@mui/material/MenuItem';

type AudioDevice = {
  id: string;
  label: string;
};

type Settings = {
  httpPort: string;
  inputDevice: AudioDevice;
  outputDevice: AudioDevice;
  recordingLength: number;
  outputFolder: string;
};

const defaultSettings: Settings = {
  httpPort: '',
  inputDevice: { id: '', label: '' },
  outputDevice: { id: '', label: '' },
  recordingLength: 0,
  outputFolder: '',
};

const fetchAudioDevices = async (): Promise<AudioDevice[]> => {
  // Replace with actual backend call
  // Example: return window.api.getAudioDevices();
  return [
    { id: 'default-in', label: 'Default Input' },
    { id: 'mic-1', label: 'Microphone 1' },
    { id: 'default-out', label: 'Default Output' },
    { id: 'spk-1', label: 'Speakers 1' },
  ];
};

const sendSettingsToBackend = (settings: Settings) => {
  // Replace with actual backend call
  // Example: window.api.updateSettings(settings);
  console.log('Settings updated:', settings);
};

export default function SettingsPage() {
  const [settings, setSettings] = useState<Settings>(defaultSettings);
  const [inputDevices, setInputDevices] = useState<AudioDevice[]>([]);
  const [outputDevices, setOutputDevices] = useState<AudioDevice[]>([]);
  const navigate = useNavigate();

  useEffect(() => {
    fetchAudioDevices()
      .then((devices) => {
        // For demo, split devices by id
        setInputDevices(devices.filter((d) => d.id.includes('in')));
        setOutputDevices(devices.filter((d) => d.id.includes('out')));
        return devices;
      })
      .catch((error) => {
        console.error('Error fetching audio devices:', error);
      });
  }, []);

  useEffect(() => {
    sendSettingsToBackend(settings);
  }, [settings]);

  const handleChange = () => {
    // const { name, value } = e.target;
    // setSettings((prev) => ({
    //   ...prev,
    //   [name]: value,
    // }));
  };

  const handleFolderChange = async () => {
    // Replace with actual folder picker
    // Example: const folder = await window.api.selectFolder();
    const folder = window.prompt(
      'Enter output folder path:',
      settings.outputFolder,
    );
    if (folder !== null) {
      setSettings((prev) => ({
        ...prev,
        outputFolder: folder,
      }));
    }
  };

  return (
    <div className="min-w-screen min-h-screen bg-midnight text-offwhite flex items-center justify-center relative">
      <div className="w-3/4 min-w-[600px] max-w-[800px] self-start flex flex-col font-sans bg-midnight text-offwhite p-6 rounded-lg relative">
        {/* X Close Button */}
        <button
          type="button"
          className="absolute top-6 right-6 text-3xl font-bold text-offwhite bg-transparent hover:text-plumDark"
          aria-label="Close settings"
          onClick={() => navigate('/')}
        >
          ×
        </button>
        <span className="text-2xl font-bold mb-4">Settings</span>
        <div className="mb-4 flex justify-between">
          <span>HTTP Port:</span>
          <TextField
            variant="standard"
            type="text"
            name="httpPort"
            value={settings.httpPort}
            onChange={(e) => {
              setSettings((prev) => ({ ...prev, httpPort: e.target.value }));
            }}
            className="ml-2 text-white w-[150px]"
          />
        </div>
        <div className="mb-4 flex justify-between">
          <span>Input Audio Device:</span>
          <Select
            variant="standard"
            name="inputDevice"
            value={settings.inputDevice}
            onChange={(e) => {
              setSettings((prev) => ({ ...prev, inputDevice: e.target.value }));
            }}
            className="ml-2 w-64"
          >
            {inputDevices.map((dev) => (
              <MenuItem key={dev.id} value={dev.id}>
                {dev.label}
              </MenuItem>
            ))}
          </Select>
        </div>
        <div className="mb-4 flex justify-between">
          <span>Output Audio Device:</span>
          <Select
            variant="standard"
            name="outputDevice"
            value={settings.outputDevice}
            onChange={(e) => {
              setSettings((prev) => ({
                ...prev,
                outputDevice: e.target.value,
              }));
            }}
            className="ml-2 w-64"
          >
            {outputDevices.map((dev) => (
              <MenuItem key={dev.id} value={dev.id}>
                {dev.label}
              </MenuItem>
            ))}
          </Select>
        </div>
        <div className="mb-4 flex justify-between">
          <span>Recording Length (seconds):</span>
          <TextField
            variant="standard"
            type="text"
            name="recordingLength"
            value={settings.recordingLength}
            onChange={(e) => {
              setSettings((prev) => ({
                ...prev,
                recordingLength: e.target.value,
              }));
            }}
            className="ml-2 w-[150px]"
          />
        </div>
        <div className="mb-4 flex justify-between">
          <span>Clip Output Folder:</span>
          <div className="flex justify-end">
            <TextField
              variant="standard"
              type="text"
              name="outputFolder"
              value={settings.outputFolder}
              className="ml-2 w-[300px]"
            />
            <button
              type="button"
              onClick={handleFolderChange}
              className="ml-2 px-3 py-1 rounded bg-plumDark text-offwhite hover:bg-plum"
            >
              ...
            </button>
          </div>
        </div>
      </div>
    </div>
  );
}