import ContentCopyIcon from '@mui/icons-material/ContentCopy'
import { List, ListItem, ListSubheader, TextField } from '@mui/material'
import { UnsignedEvent, nip19, kinds, VerifiedEvent } from 'nostr-tools'
import { useEffect, useMemo, useState } from 'react'
import { useParams } from 'react-router-dom'
import { toast } from 'react-toastify'
import placeholderAvatar from '../../assets/images/nostr-logo.jpg'
import { MetadataController, NostrController } from '../../controllers'
import { ProfileMetadata } from '../../types'
import styles from './style.module.scss'
import { useDispatch, useSelector } from 'react-redux'
import { State } from '../../store/rootReducer'
import { LoadingButton } from '@mui/lab'
import { Dispatch } from '../../store/store'
import { setMetadataEvent } from '../../store/actions'
import { LoadingSpinner } from '../../components/LoadingSpinner'

export const ProfilePage = () => {
  const { npub } = useParams()

  const dispatch: Dispatch = useDispatch()

  const metadataController = useMemo(() => new MetadataController(), [])
  const nostrController = NostrController.getInstance()

  const [pubkey, setPubkey] = useState<string>()
  const [profileMetadata, setProfileMetadata] = useState<ProfileMetadata>()
  const [savingProfileMetadata, setSavingProfileMetadata] = useState(false)
  const metadataState = useSelector((state: State) => state.metadata)
  const keys = useSelector((state: State) => state.auth?.keyPair)
  const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)

  const [isUsersOwnProfile, setIsUsersOwnProfile] = useState(false)

  const [isLoading, setIsLoading] = useState(true)
  const [loadingSpinnerDesc] = useState('Fetching metadata')

  useEffect(() => {
    if (npub) {
      try {
        const hexPubkey = nip19.decode(npub).data as string
        setPubkey(hexPubkey)

        if (hexPubkey === usersPubkey) setIsUsersOwnProfile(true)
      } catch (error) {
        toast.error('Error occurred in decoding npub' + error)
      }
    }
  }, [npub, usersPubkey])

  useEffect(() => {
    if (isUsersOwnProfile && metadataState) {
      const metadataContent = metadataController.extractProfileMetadataContent(
        metadataState as VerifiedEvent
      )
      if (metadataContent) {
        setProfileMetadata(metadataContent)
        setIsLoading(false)
      }

      return
    }

    if (pubkey) {
      const getMetadata = async (pubkey: string) => {
        const metadataEvent = await metadataController
          .findMetadata(pubkey)
          .catch((err) => {
            toast.error(err)
            return null
          })

        if (metadataEvent) {
          const metadataContent =
            metadataController.extractProfileMetadataContent(metadataEvent)
          if (metadataContent) setProfileMetadata(metadataContent)
        }

        setIsLoading(false)
      }

      getMetadata(pubkey)
    }
  }, [isUsersOwnProfile, metadataState, pubkey, metadataController])

  const editItem = (
    key: keyof ProfileMetadata,
    label: string,
    multiline = false,
    rows = 1
  ) => (
    <ListItem sx={{ marginTop: 1 }}>
      <TextField
        label={label}
        id={label.split(' ').join('-')}
        value={profileMetadata![key] || ''}
        size='small'
        multiline={multiline}
        rows={rows}
        className={styles.textField}
        disabled={!isUsersOwnProfile}
        onChange={(event: React.ChangeEvent<HTMLInputElement>) => {
          const { value } = event.target

          setProfileMetadata((prev) => ({
            ...prev,
            [key]: value
          }))
        }}
      />
    </ListItem>
  )

  const copyItem = (
    value: string,
    label: string,
    copyValue?: string,
    isPassword = false
  ) => (
    <ListItem
      sx={{ marginTop: 1 }}
      onClick={() => {
        navigator.clipboard.writeText(copyValue || value)

        toast.success('Copied to clipboard', {
          autoClose: 1000,
          hideProgressBar: true
        })
      }}
    >
      <TextField
        label={label}
        id={label.split(' ').join('-')}
        defaultValue={value}
        size='small'
        className={styles.textField}
        disabled
        type={isPassword ? 'password' : 'text'}
      />
      <ContentCopyIcon className={styles.copyItem} />
    </ListItem>
  )

  const handleSaveMetadata = async () => {
    setSavingProfileMetadata(true)

    const content = JSON.stringify(profileMetadata)

    // We need to omit cachedAt and create new event
    // Relay will reject if created_at is too late
    const updatedMetadataState: UnsignedEvent = {
      content: content,
      created_at: Math.round(Date.now() / 1000),
      kind: kinds.Metadata,
      pubkey: pubkey!,
      tags: metadataState?.tags || []
    }

    const signedEvent = await nostrController
      .signEvent(updatedMetadataState)
      .catch((error) => {
        toast.error(`Error saving profile metadata. ${error}`)
      })

    if (signedEvent) {
      if (!metadataController.validate(signedEvent)) {
        toast.error(`Metadata is not valid.`)
      }

      await metadataController.publishMetadataEvent(signedEvent)

      dispatch(setMetadataEvent(signedEvent))
    }

    setSavingProfileMetadata(false)
  }

  return (
    <>
      {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
      <div className={styles.container}>
        <List
          sx={{
            bgcolor: 'background.paper',
            marginTop: 2
          }}
          subheader={
            <ListSubheader
              sx={{
                paddingBottom: 1,
                paddingTop: 1,
                fontSize: '1.5rem'
              }}
              className={styles.subHeader}
            >
              Profile Settings
            </ListSubheader>
          }
        >
          {profileMetadata && (
            <div>
              <ListItem
                sx={{
                  marginTop: 1,
                  display: 'flex',
                  flexDirection: 'column',
                  gap: 2
                }}
              >
                <img
                  onError={(event: any) => {
                    event.target.src = placeholderAvatar
                  }}
                  className={styles.img}
                  src={profileMetadata.picture || placeholderAvatar}
                  alt='Profile Image'
                />
              </ListItem>

              {editItem('name', 'Username')}
              {editItem('display_name', 'Display Name')}
              {editItem('nip05', 'Nostr Address (nip05)')}
              {editItem('lud16', 'Lightning Address (lud16)')}
              {editItem('about', 'About', true, 4)}
              {isUsersOwnProfile && (
                <>
                  {keys && keys.public && copyItem(keys.public, 'Public Key')}
                  {keys &&
                    keys.private &&
                    copyItem(
                      '••••••••••••••••••••••••••••••••••••••••••••••••••',
                      'Private Key',
                      keys.private
                    )}
                </>
              )}
            </div>
          )}
        </List>
        {isUsersOwnProfile && (
          <LoadingButton
            loading={savingProfileMetadata}
            variant='contained'
            onClick={handleSaveMetadata}
          >
            SAVE
          </LoadingButton>
        )}
      </div>
    </>
  )
}