import React, { useState, useContext, useEffect, useRef } from 'react'
import PropTypes from 'prop-types'
import { Flex, Alert, Card, Spin, Splitter, Button, Modal, Input } from 'antd'
import { LoadingOutlined } from '@ant-design/icons'
import PlusIcon from '../../Icons/PlusIcon.jsx'
import MinusIcon from '../../Icons/MinusIcon.jsx'
import ExclamationOctagonIcon from '../../Icons/ExclamationOctagonIcon.jsx'
import CheckCircleIcon from '../../Icons/CheckCircleIcon.jsx'
import ObjectProperty from '../common/ObjectProperty.jsx'
import { ApiServerContext } from '../context/ApiServerContext.js'
import InfoCircleIcon from '../../Icons/InfoCircleIcon.jsx'

const TemplateEditor = ({
  objectData,
  loading,
  collapseState,
  isEditing,
  style
}) => {
  const iframeRef = useRef(null)
  const { fetchTemplatePreview } = useContext(ApiServerContext)
  const [testObjectOpen, setTestObjectOpen] = useState(false)
  const [previewMessage, setPreviewMessage] = useState('No issues found.')
  const [previewError, setPreviewError] = useState(false)
  const [previewContent, setPreviewContent] = useState('')
  const [reloadLoading, setReloadLoading] = useState(false)
  const [previewScale, setPreviewScale] = useState(1)

  const updatePreviewContent = (html) => {
    if (iframeRef.current) {
      // Save current scroll position
      const scrollY = iframeRef.current.contentWindow.scrollY
      const scrollX = iframeRef.current.contentWindow.scrollX

      // Update srcDoc
      setPreviewContent(html)

      // Restore scroll position after iframe loads new content
      const handleLoad = () => {
        iframeRef.current.contentWindow.scrollTo(scrollX, scrollY)
        iframeRef.current.removeEventListener('load', handleLoad)
      }
      iframeRef.current.addEventListener('load', handleLoad)
    }
  }

  function reloadPreview(content, testObject = {}, scale = 1) {
    fetchTemplatePreview(
      objectData._id,
      content,
      testObject,
      scale,
      (result) => {
        setReloadLoading(false)
        if (result?.error) {
          setPreviewError(true)
          setPreviewMessage(result.error)
        } else {
          setPreviewError(false)
          updatePreviewContent(result.html)
          setPreviewMessage('No issues found.')
        }
      }
    )
  }

  // Move useEffect to component level and use state to track objectData changes
  useEffect(() => {
    if (objectData) {
      console.log('PreviewScale', previewScale)
      reloadPreview(objectData.content, objectData.testObject, previewScale)
    }
  }, [objectData, previewScale])

  return (
    <>
      <Splitter className={'farmcontrol-splitter'}>
        {collapseState.preview == true && (
          <Splitter.Panel style={{ height: '100%' }}>
            <Spin
              spinning={loading || reloadLoading}
              indicator={<LoadingOutlined />}
            >
              <Card style={style} styles={{ body: { height: '100%' } }}>
                <Flex vertical gap={'middle'} style={{ height: '100%' }}>
                  <Flex gap={'small'}>
                    {objectData?.objectType ? (
                      <ObjectProperty
                        objectType={objectData?.objectType}
                        name={'testObject'}
                        isEditing={true}
                        objectData={objectData}
                        disabled={!isEditing || objectData?.global}
                        type={'object'}
                      />
                    ) : (
                      <div style={{ flexGrow: 1 }}>
                        <Input disabled={true} />
                      </div>
                    )}
                    <Button
                      icon={<InfoCircleIcon />}
                      onClick={() => {
                        setTestObjectOpen(true)
                      }}
                    />
                    <Button
                      icon={<PlusIcon />}
                      onClick={() => {
                        setPreviewScale((prev) => prev + 0.1)
                      }}
                    />
                    <Button
                      icon={<MinusIcon />}
                      onClick={() => {
                        setPreviewScale((prev) => prev - 0.1)
                      }}
                    />
                  </Flex>

                  <iframe
                    ref={iframeRef}
                    srcDoc={previewContent}
                    frameBorder='0'
                    style={{
                      width: '100%',
                      flexGrow: 1,
                      border: '1px solid #85858541',
                      overflow: 'auto'
                    }}
                  />
                </Flex>
              </Card>
            </Spin>
          </Splitter.Panel>
        )}
        {collapseState.editor == true && (
          <Splitter.Panel>
            <Spin spinning={loading} indicator={<LoadingOutlined />}>
              <Card style={style} styles={{ body: { height: '100%' } }}>
                <Flex vertical gap={'middle'} style={{ height: '100%' }}>
                  <Alert
                    message={previewMessage}
                    showIcon
                    style={{ padding: '4px 8px' }}
                    icon={
                      previewError ? (
                        <ExclamationOctagonIcon />
                      ) : (
                        <CheckCircleIcon />
                      )
                    }
                    type={previewError ? 'error' : 'success'}
                  />

                  <div
                    style={{
                      overflowY: 'scroll',
                      height: '100%',
                      flex: '1 1 auto'
                    }}
                  >
                    <ObjectProperty
                      name={'content'}
                      height='100%'
                      type='codeBlock'
                      language={'xml'}
                      objectData={objectData}
                      isEditing={isEditing}
                    />
                  </div>
                </Flex>
              </Card>
            </Spin>
          </Splitter.Panel>
        )}
      </Splitter>
      <Modal
        open={testObjectOpen}
        closeIcon={null}
        footer={
          <Button
            onClick={() => {
              setTestObjectOpen(false)
            }}
          >
            Close
          </Button>
        }
      >
        <ObjectProperty
          type={'codeBlock'}
          name='testObject'
          language='json'
          objectData={objectData}
          isEditing={true}
        />
      </Modal>
    </>
  )
}

TemplateEditor.propTypes = {
  loading: PropTypes.bool,
  objectData: PropTypes.object,
  collapseState: PropTypes.object,
  isEditing: PropTypes.bool,
  style: PropTypes.object
}

export default TemplateEditor
