import React, { Dispatch, SetStateAction } from 'react'

import {
  Backdrop,
  Box,
  CircularProgress,
  Paper,
  Tab,
  Tooltip,
  Typography
} from '@mui/material'
import { styled } from '@mui/material/styles'

import Editor, { MonacoDiffEditor } from 'react-monaco-editor'
import { TabContext, TabList, TabPanel } from '@mui/lab'

import FilePathInputModal from '../../components/filePathInputModal'
import FileMenu from './internal/components/fileMenu'
import RunMenu from './internal/components/runMenu'

import { usePrompt } from '../../utils/hooks'
import { getLanguageFromExtension } from './internal/helper'
import useEditor from './internal/hooks/useEditor'

const StyledTabPanel = styled(TabPanel)(() => ({
  padding: '10px'
}))

const StyledTab = styled(Tab)(() => ({
  fontSize: '1rem',
  color: 'gray',
  '&.Mui-selected': {
    color: 'black'
  }
}))

type SASjsEditorProps = {
  selectedFilePath: string
  setSelectedFilePath: (filePath: string, refreshSideBar?: boolean) => void
  tab: string
  setTab: Dispatch<SetStateAction<string>>
}

const SASjsEditor = ({
  selectedFilePath,
  setSelectedFilePath,
  tab,
  setTab
}: SASjsEditorProps) => {
  const {
    ctrlPressed,
    fileContent,
    isLoading,
    log,
    openFilePathInputModal,
    prevFileContent,
    runTimes,
    selectedFileExtension,
    selectedRunTime,
    showDiff,
    webout,
    Dialog,
    handleChangeRunTime,
    handleDiffEditorDidMount,
    handleEditorDidMount,
    handleFilePathInput,
    handleKeyDown,
    handleKeyUp,
    handleRunBtnClick,
    handleTabChange,
    saveFile,
    setShowDiff,
    setOpenFilePathInputModal,
    setFileContent,
    Snackbar
  } = useEditor({ selectedFilePath, setSelectedFilePath, setTab })

  usePrompt(
    'Changes you made may not be saved.',
    prevFileContent !== fileContent && !!selectedFilePath
  )

  const fileMenu = (
    <FileMenu
      showDiff={showDiff}
      setShowDiff={setShowDiff}
      prevFileContent={prevFileContent}
      currentFileContent={fileContent}
      selectedFilePath={selectedFilePath}
      setOpenFilePathInputModal={setOpenFilePathInputModal}
      saveFile={saveFile}
    />
  )

  const monacoEditor = showDiff ? (
    <MonacoDiffEditor
      height="98%"
      language={getLanguageFromExtension(selectedFileExtension)}
      original={prevFileContent}
      value={fileContent}
      editorDidMount={handleDiffEditorDidMount}
      options={{ readOnly: ctrlPressed }}
      onChange={(val) => setFileContent(val)}
    />
  ) : (
    <Editor
      height="98%"
      language={getLanguageFromExtension(selectedFileExtension)}
      value={fileContent}
      editorDidMount={handleEditorDidMount}
      options={{ readOnly: ctrlPressed }}
      onChange={(val) => setFileContent(val)}
    />
  )

  return (
    <Box sx={{ width: '100%', typography: 'body1', marginTop: '50px' }}>
      <Backdrop
        sx={{ color: '#fff', zIndex: (theme) => theme.zIndex.drawer + 1 }}
        open={isLoading}
      >
        <CircularProgress color="inherit" />
      </Backdrop>
      {selectedFilePath && !runTimes.includes(selectedFileExtension) ? (
        <Box sx={{ marginTop: '10px' }}>
          <Box sx={{ display: 'flex', justifyContent: 'center' }}>
            {fileMenu}
          </Box>
          <Paper
            sx={{
              height: 'calc(100vh - 140px)',
              padding: '10px',
              margin: '0 24px',
              overflow: 'auto',
              position: 'relative'
            }}
            elevation={3}
          >
            {monacoEditor}
          </Paper>
        </Box>
      ) : (
        <TabContext value={tab}>
          <Box
            sx={{
              borderBottom: 1,
              borderColor: 'divider',
              background: 'white'
            }}
          >
            <TabList onChange={handleTabChange} centered>
              <StyledTab label="Code" value="code" />
              <StyledTab label="Log" value="log" />
              <StyledTab
                label={
                  <Tooltip title="Displays content from the _webout fileref">
                    <Typography>Webout</Typography>
                  </Tooltip>
                }
                value="webout"
              />
            </TabList>
          </Box>

          <StyledTabPanel sx={{ paddingBottom: 0 }} value="code">
            <Box sx={{ display: 'flex', justifyContent: 'center' }}>
              <RunMenu
                fileContent={fileContent}
                prevFileContent={prevFileContent}
                selectedFilePath={selectedFilePath}
                selectedRunTime={selectedRunTime}
                runTimes={runTimes}
                handleChangeRunTime={handleChangeRunTime}
                handleRunBtnClick={handleRunBtnClick}
              />
              {fileMenu}
            </Box>
            <Paper
              onKeyUp={handleKeyUp}
              onKeyDown={handleKeyDown}
              sx={{
                height: 'calc(100vh - 170px)',
                padding: '10px',
                overflow: 'auto',
                position: 'relative'
              }}
              elevation={3}
            >
              {monacoEditor}
              <p
                style={{
                  position: 'absolute',
                  left: 0,
                  right: 0,
                  bottom: -10,
                  textAlign: 'center',
                  fontSize: '13px'
                }}
              >
                Press CTRL + ENTER to run code
              </p>
            </Paper>
          </StyledTabPanel>
          <StyledTabPanel value="log">
            <div>
              <h2>Log</h2>
              <pre id="log" style={{ overflow: 'auto', height: '75vh' }}>
                {log}
              </pre>
            </div>
          </StyledTabPanel>
          <StyledTabPanel value="webout">
            <div>
              <pre>{webout}</pre>
            </div>
          </StyledTabPanel>
        </TabContext>
      )}
      <Dialog />
      <Snackbar />
      <FilePathInputModal
        open={openFilePathInputModal}
        setOpen={setOpenFilePathInputModal}
        saveFile={handleFilePathInput}
      />
    </Box>
  )
}

export default SASjsEditor