import React, { useState, useEffect, useRef } from 'react'
import { Box, Text, useInput, Newline } from 'ink'
import TextInput from 'ink-text-input'
import SelectInput from 'ink-select-input'

/**
 * Simplified composite input component - show menu OR text input, not both
 */
const CompositeInput = ({
  options = [],
  onSubmit,
  placeholder = 'Type your answer...',
  initialValue = '',
  onBack = null,
  isReview = false,
  onPrevious = null,
  showTypeYourAnswer = true,
  directSubmitValues = [],
}) => {
  const [mode, setMode] = useState(options.length > 0 ? 'select' : 'text')
  const [inputValue, setInputValue] = useState('')
  const [exitPrompt, setExitPrompt] = useState(false)
  const lastCtrlC = useRef(0)

  // Handle Ctrl+C to exit init and return to main menu
  useInput((input, key) => {
    if (key.ctrl && input === 'c') {
      const now = Date.now()
      if (now - lastCtrlC.current < 2000) {
        // Double Ctrl+C within 2 seconds - exit to main menu
        if (onBack) onBack()
      } else {
        setExitPrompt(true)
        lastCtrlC.current = now
        setTimeout(() => {
          setExitPrompt(false)
        }, 2000)
      }
    }
  })

  // Reset when options or initial value changes
  useEffect(() => {
    setMode(options.length > 0 ? 'select' : 'text')
    setInputValue(initialValue)
    setExitPrompt(false)
  }, [options, initialValue])

  // Prepare select items with optional "Type your answer..." as last option
  const selectItems =
    options.length > 0
      ? [
          ...options.map(opt => ({
            label: opt.label,
            value: opt.value,
          })),
          ...(showTypeYourAnswer
            ? [
                {
                  label: 'Type your answer...',
                  value: '__custom_input__',
                },
              ]
            : []),
        ]
      : []

  // Handle selection from menu
  const handleSelect = item => {
    if (item.value === '__custom_input__') {
      // For "Type your answer..." option, switch to text mode
      setMode('text')
      setInputValue('')
    } else if (directSubmitValues.includes(item.value)) {
      // For direct submit values, submit immediately without text mode
      onSubmit(item.value)
    } else {
      // For other options, switch to text mode and pre-fill
      setMode('text')
      setInputValue(item.label)
    }
  }

  // Handle text input submission
  const handleTextSubmit = value => {
    if (value.trim()) {
      // Handle /back command to go to previous question
      if (value.toLowerCase() === '/back' && !isReview && onPrevious) {
        onPrevious()
        return
      }
      onSubmit(value)
    }
  }

  return (
    <Box flexDirection='column'>
      {/* Show either select menu or text input */}
      <Box flexDirection='column'>
        {mode === 'select' && options.length > 0 ? (
          <Box
            paddingX={1}
            paddingY={0}
            borderColor='whiteBright'
            borderStyle='round'
            width={'100%'}
          >
            <SelectInput items={selectItems} onSelect={handleSelect} />
          </Box>
        ) : (
          <Box
            paddingX={1}
            paddingY={0}
            borderColor='whiteBright'
            borderStyle='round'
            width={'100%'}
          >
            <Text color='blue'>{'> '}</Text>
            <TextInput
              value={inputValue}
              onChange={setInputValue}
              onSubmit={handleTextSubmit}
              placeholder={placeholder}
              focus={true}
            />
          </Box>
        )}
      </Box>

      {/* Help text */}
      <Box marginTop={1}>
        <Text dimColor fontSize={12}>
          {mode === 'select' ? (
            <>Use ↑↓ to navigate, Enter to select</>
          ) : isReview ? (
            <>Use /1, /2, etc. to jump to specific questions</>
          ) : (
            <>Use /back to go to previous question</>
          )}
        </Text>
      </Box>

      {/* Exit prompt */}
      {exitPrompt && (
        <Box marginTop={1}>
          <Text color='yellow'>Press Ctrl+C again to return to main menu</Text>
        </Box>
      )}
    </Box>
  )
}

export default CompositeInput