import browser from 'webextension-polyfill'
import { useState, useCallback, useEffect } from 'react'
import { render } from 'react-dom'
import { generateSecretKey, nip19 } from 'nostr-tools'
import QRCode from 'react-qr-code'
import * as Tabs from '@radix-ui/react-tabs'
import { LogoIcon } from './icons'
import { removePermissions } from './common'
import * as Checkbox from '@radix-ui/react-checkbox'
import { hexToBytes, bytesToHex } from 'nostr-tools/utils'

function Options() {
  const [privKey, setPrivKey] = useState('')
  const [relays, setRelays] = useState([])
  const [newRelayURL, setNewRelayURL] = useState('')
  const [policies, setPermissions] = useState([])
  const [hidingPrivateKey, hidePrivateKey] = useState(true)
  const [showNotifications, setNotifications] = useState(false)
  const [messages, setMessages] = useState([])
  const [handleNostrLinks, setHandleNostrLinks] = useState(false)
  const [showProtocolHandlerHelp, setShowProtocolHandlerHelp] = useState(false)
  const [unsavedChanges, setUnsavedChanges] = useState([])
  const [protocolHandler, setProtocolHandler] = useState(
    'https://njump.me/{raw}'
  )

  const showMessage = useCallback((msg) => {
    messages.push(msg)
    setMessages(messages)
    setTimeout(() => setMessages([]), 3000)
  })

  const loadPermissions = useCallback(async () => {
    const { policies = {} } = await browser.storage.local.get('policies')
    const list = []

    Object.entries(policies).forEach(([host, accepts]) => {
      Object.entries(accepts).forEach(([accept, types]) => {
        Object.entries(types).forEach(([type, { conditions, created_at }]) => {
          list.push({
            host,
            type,
            accept,
            conditions,
            created_at
          })
        })
      })
    })

    setPermissions(list)
  }, [])

  useEffect(() => {
    browser.storage.local
      .get(['private_key', 'relays', 'protocol_handler', 'notifications'])
      .then((results) => {
        if (results.private_key) {
          const pkey = results.private_key
          const nsec = nip19.nsecEncode(hexToBytes(pkey))
          setPrivKey(nsec)
        }

        if (results.relays) {
          const relaysList = []
          for (const url in results.relays) {
            relaysList.push({
              url,
              policy: results.relays[url]
            })
          }
          setRelays(relaysList)
        }

        if (results.protocol_handler) {
          setProtocolHandler(results.protocol_handler)
          setHandleNostrLinks(true)
          setShowProtocolHandlerHelp(false)
        }

        if (results.notifications) {
          setNotifications(true)
        }
      })
  }, [])

  useEffect(() => {
    loadPermissions()
  }, [loadPermissions])

  return (
    <div className="w-screen h-screen flex flex-col items-center justify-center">
      <div className="p-8 shadow-primary border border-primary rounded-2xl max-w-xl mx-auto flex flex-col gap-4">
        <div className="flex items-center gap-4">
          <LogoIcon />
          <div>
            <h1 className="text-lg font-semibold">Nostr Signer</h1>
            <p className="text-sm text-muted font-medium">Nostr signer</p>
          </div>
        </div>
        <div className="flex flex-col">
          <div className="mb-4 flex flex-col gap-2">
            <div className="font-semibold text-base">Private key:</div>
            <div>
              <div className="flex gap-2">
                <input
                  type={hidingPrivateKey ? 'password' : 'text'}
                  value={privKey}
                  onChange={handleKeyChange}
                  className="flex-1 h-9 bg-transparent border border-primary px-3 py-1 rounded-lg"
                />
                <div className="shrink-0">
                  {!privKey && (
                    <button
                      type="button"
                      onClick={generate}
                      className="px-3 h-9 font-semibold border w-24 border-primary shadow-sm rounded-lg inline-flex items-center justify-center disabled:text-muted"
                    >
                      Generate
                    </button>
                  )}
                  {privKey && hidingPrivateKey && (
                    <button
                      type="button"
                      onClick={() => hidePrivateKey(false)}
                      className="px-3 h-9 font-bold border w-24 border-primary shadow-sm rounded-lg inline-flex items-center justify-center disabled:text-muted"
                    >
                      Show key
                    </button>
                  )}
                  {privKey && !hidingPrivateKey && (
                    <button
                      type="button"
                      onClick={() => hidePrivateKey(true)}
                      className="px-3 h-9 font-bold border w-24 border-primary shadow-sm rounded-lg inline-flex items-center justify-center disabled:text-muted"
                    >
                      Hide key
                    </button>
                  )}
                </div>
              </div>
              <div className="mt-1 text-sm">
                {privKey && !isKeyValid() ? (
                  <p className="text-red-500">Private key is invalid!</p>
                ) : (
                  <p className="text-gray-500">
                    Your key is stored locally. The developer has no way of
                    seeing your keys.
                  </p>
                )}
              </div>
              {!hidingPrivateKey && isKeyValid() && (
                <div className="mt-5 flex flex-col items-center">
                  <QRCode
                    size={256}
                    value={privKey.toUpperCase()}
                    viewBox={`0 0 256 256`}
                    className="w-full max-w-full"
                  />
                </div>
              )}
            </div>
          </div>
          <Tabs.Root className="mb-4" defaultValue="relays">
            <Tabs.List className="mb-4 w-full border-b border-primary h-11 flex items-center gap-6">
              <Tabs.Trigger
                className="font-medium flex items-center text-muted gap-2 h-11 data-[state=active]:text-primary data-[state=active]:border-b data-[state=active]:border-secondary"
                value="relays"
              >
                Relays
                <span className="px-3 h-6 inline-flex items-center justify-center bg-muted data-[state=active]:text-primary rounded-full">
                  {relays.length}
                </span>
              </Tabs.Trigger>
              <Tabs.Trigger
                className="font-medium flex items-center text-muted gap-2 h-11 data-[state=active]:text-primary data-[state=active]:border-b data-[state=active]:border-secondary"
                value="permissions"
              >
                Permissions
                <span className="px-3 h-6 inline-flex items-center justify-center bg-muted data-[state=active]:text-primary rounded-full">
                  {policies.length}
                </span>
              </Tabs.Trigger>
            </Tabs.List>
            <Tabs.Content value="relays">
              <div className="flex flex-col gap-2">
                <div className="font-semibold text-base">Preferred Relays:</div>
                <div className="flex flex-col gap-2">
                  {relays.map(({ url, policy }, i) => (
                    <div key={url} className="flex items-center gap-4">
                      <input
                        value={url}
                        onChange={changeRelayURL.bind(null, i)}
                        className="flex-1 h-9 bg-transparent border px-3 py-1 border-primary rounded-lg placeholder:text-muted"
                      />
                      <div className="flex items-center gap-2">
                        <div className="inline-flex items-center gap-2">
                          <Checkbox.Root
                            id={`read-${i}`}
                            checked={policy.read}
                            onCheckedChange={toggleRelayPolicy.bind(
                              null,
                              i,
                              'read'
                            )}
                            className="flex h-6 w-6 appearance-none items-center justify-center rounded-lg bg-white outline-none border border-primary data-[state=checked]:bg-primary data-[state=checked]:border-secondary"
                          >
                            <Checkbox.Indicator className="text-white">
                              <svg
                                xmlns="http://www.w3.org/2000/svg"
                                fill="none"
                                viewBox="0 0 24 24"
                                strokeWidth={1.5}
                                stroke="currentColor"
                                className="w-4 h-4"
                                aria-hidden="true"
                              >
                                <path
                                  strokeLinecap="round"
                                  strokeLinejoin="round"
                                  d="M4.5 12.75l6 6 9-13.5"
                                />
                              </svg>
                            </Checkbox.Indicator>
                          </Checkbox.Root>
                          <label
                            htmlFor={`read-${i}`}
                            className="text-muted font-medium"
                          >
                            Read
                          </label>
                        </div>
                        <div className="inline-flex items-center gap-2">
                          <Checkbox.Root
                            id={`write-${i}`}
                            checked={policy.write}
                            onCheckedChange={toggleRelayPolicy.bind(
                              null,
                              i,
                              'write'
                            )}
                            className="flex h-6 w-6 appearance-none items-center justify-center rounded-lg bg-white outline-none border border-primary data-[state=checked]:bg-primary data-[state=checked]:border-secondary"
                          >
                            <Checkbox.Indicator className="text-white">
                              <svg
                                xmlns="http://www.w3.org/2000/svg"
                                fill="none"
                                viewBox="0 0 24 24"
                                strokeWidth={1.5}
                                stroke="currentColor"
                                className="w-4 h-4"
                                aria-hidden="true"
                              >
                                <path
                                  strokeLinecap="round"
                                  strokeLinejoin="round"
                                  d="M4.5 12.75l6 6 9-13.5"
                                />
                              </svg>
                            </Checkbox.Indicator>
                          </Checkbox.Root>
                          <label
                            htmlFor={`write-${i}`}
                            className="text-muted font-medium"
                          >
                            Write
                          </label>
                        </div>
                      </div>
                      <button
                        type="button"
                        onClick={removeRelay.bind(null, i)}
                        className="shrink-0 px-3 w-24 h-9 font-semibold border border-primary shadow-sm rounded-lg inline-flex items-center justify-center disabled:text-muted"
                      >
                        Remove
                      </button>
                    </div>
                  ))}
                  <div className="flex gap-2">
                    <input
                      value={newRelayURL}
                      onChange={(e) => setNewRelayURL(e.target.value)}
                      onKeyDown={(e) => {
                        if (e.key === 'Enter') addNewRelay()
                      }}
                      placeholder="wss://"
                      className="flex-1 h-9 bg-transparent border px-3 py-1 border-primary rounded-lg placeholder:text-muted"
                    />
                    <button
                      type="button"
                      disabled={!newRelayURL}
                      onClick={addNewRelay}
                      className="shrink-0 px-3 w-24 h-9 font-semibold border border-primary shadow-sm rounded-lg inline-flex items-center justify-center disabled:text-muted"
                    >
                      Add Relay
                    </button>
                  </div>
                </div>
              </div>
            </Tabs.Content>
            <Tabs.Content value="permissions">
              <div className="flex flex-col gap-2">
                <div className="font-semibold text-base">Permissions:</div>
                {!policies.length ? (
                  <div className="text-muted">
                    You haven't granted any permissions to any apps yet
                  </div>
                ) : (
                  <table className="table-auto">
                    <thead>
                      <tr className="mb-2">
                        <th className="text-left border-b-8 border-transparent">
                          Domain
                        </th>
                        <th className="text-left border-b-8 border-transparent">
                          Permission
                        </th>
                        <th className="text-left border-b-8 border-transparent">
                          Answer
                        </th>
                        <th className="text-left border-b-8 border-transparent">
                          Conditions
                        </th>
                        <th className="text-left border-b-8 border-transparent">
                          Since
                        </th>
                        <th></th>
                      </tr>
                    </thead>
                    <tbody>
                      {policies.map(
                        ({ host, type, accept, conditions, created_at }) => (
                          <tr
                            key={
                              host + type + accept + JSON.stringify(conditions)
                            }
                          >
                            <td className="font-semibold">{host}</td>
                            <td className="text-muted">{type}</td>
                            <td className="text-muted">
                              {accept === 'true' ? 'allow' : 'deny'}
                            </td>
                            <td className="text-muted">
                              {conditions.kinds
                                ? `kinds: ${Object.keys(conditions.kinds).join(
                                    ', '
                                  )}`
                                : 'always'}
                            </td>
                            <td className="text-muted">
                              {new Date(created_at * 1000)
                                .toISOString()
                                .split('.')[0]
                                .split('T')
                                .join(' ')}
                            </td>
                            <td>
                              <button
                                type="button"
                                onClick={handleRevoke}
                                data-host={host}
                                data-accept={accept}
                                data-type={type}
                                className="text-primary font-semibold"
                              >
                                Revoke
                              </button>
                            </td>
                          </tr>
                        )
                      )}
                      {!policies.length && (
                        <tr>
                          <td>N/A</td>
                          <td>N/A</td>
                          <td>N/A</td>
                          <td>N/A</td>
                          <td>N/A</td>
                        </tr>
                      )}
                    </tbody>
                  </table>
                )}
              </div>
            </Tabs.Content>
          </Tabs.Root>
          <div className="mb-3">
            <div className="flex items-center gap-2">
              <Checkbox.Root
                id="notification"
                className="flex h-6 w-6 appearance-none items-center justify-center rounded-lg bg-white outline-none border border-primary data-[state=checked]:bg-primary data-[state=checked]:border-secondary"
                checked={showNotifications}
                onCheckedChange={handleNotifications}
              >
                <Checkbox.Indicator className="text-white">
                  <svg
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 24 24"
                    strokeWidth={1.5}
                    stroke="currentColor"
                    className="w-4 h-4"
                    aria-hidden="true"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      d="M4.5 12.75l6 6 9-13.5"
                    />
                  </svg>
                </Checkbox.Indicator>
              </Checkbox.Root>
              <label htmlFor="notification">
                Show desktop notifications when a permissions has been used
              </label>
            </div>
          </div>
          <div>
            <details>
              <summary className="flex items-center justify-between">
                <div className="font-semibold text-base">Advanced</div>
                <div>
                  <svg
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 24 24"
                    strokeWidth={1.5}
                    stroke="currentColor"
                    className="w-5 h-5"
                    aria-hidden="true"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      d="M19.5 8.25l-7.5 7.5-7.5-7.5"
                    />
                  </svg>
                </div>
              </summary>
              <div className="mt-3">
                <div className="flex items-center gap-2">
                  <Checkbox.Root
                    id="nostrlink"
                    className="flex h-6 w-6 appearance-none items-center justify-center rounded-lg bg-white outline-none border border-primary data-[state=checked]:bg-primary data-[state=checked]:border-secondary"
                    checked={handleNostrLinks}
                    onCheckedChange={changeHandleNostrLinks}
                  >
                    <Checkbox.Indicator className="text-white">
                      <svg
                        xmlns="http://www.w3.org/2000/svg"
                        fill="none"
                        viewBox="0 0 24 24"
                        strokeWidth={1.5}
                        stroke="currentColor"
                        className="w-4 h-4"
                        aria-hidden="true"
                      >
                        <path
                          strokeLinecap="round"
                          strokeLinejoin="round"
                          d="M4.5 12.75l6 6 9-13.5"
                        />
                      </svg>
                    </Checkbox.Indicator>
                  </Checkbox.Root>
                  <label htmlFor="nostrlink">Handle nostr links</label>
                </div>
                {handleNostrLinks && (
                  <div className="mt-3">
                    <div className="flex">
                      <input
                        placeholder="url template"
                        value={protocolHandler}
                        onChange={handleChangeProtocolHandler}
                      />
                      {!showProtocolHandlerHelp && (
                        <button
                          type="button"
                          onClick={changeShowProtocolHandlerHelp}
                        >
                          ?
                        </button>
                      )}
                    </div>
                    {showProtocolHandlerHelp && (
                      <pre className="bg-muted px-2 rounded-xl overflow-scroll">{`
{raw} = anything after the colon, i.e. the full nip19 bech32 string
{hex} = hex pubkey for npub or nprofile, hex event id for note or nevent
{p_or_e} = "p" for npub or nprofile, "e" for note or nevent
{u_or_n} = "u" for npub or nprofile, "n" for note or nevent
{relay0} = first relay in a nprofile or nevent
{relay1} = second relay in a nprofile or nevent
{relay2} = third relay in a nprofile or nevent
{hrp} = human-readable prefix of the nip19 string

examples:
  - https://njump.me/{raw}
  - https://snort.social/{raw}
  - https://nostr.band/{raw}
                `}</pre>
                    )}
                  </div>
                )}
              </div>
            </details>
          </div>
        </div>
        <button
          type="button"
          disabled={!unsavedChanges.length}
          onClick={saveChanges}
          className="w-full h-10 bg-primary rounded-xl font-bold inline-flex items-center justify-center text-white disabled:cursor-not-allowed disabled:opacity-70 transform active:translate-y-1 transition-transform ease-in-out duration-75"
        >
          Save
        </button>
      </div>
    </div>
  )

  async function handleKeyChange(e) {
    const key = e.target.value.toLowerCase().trim()
    setPrivKey(key)
    addUnsavedChanges('private_key')
  }

  async function generate() {
    setPrivKey(nip19.nsecEncode(generateSecretKey()))
    addUnsavedChanges('private_key')
  }

  async function saveKey() {
    if (!isKeyValid()) {
      showMessage('PRIVATE KEY IS INVALID! did not save private key.')
      return
    }

    let hexOrEmptyKey = privKey

    try {
      const { type, data } = nip19.decode(privKey)
      if (type === 'nsec') hexOrEmptyKey = bytesToHex(data)
    } catch (_) {
      showMessage('Invalid private key format.')
      return
    }

    await browser.storage.local.set({
      private_key: hexOrEmptyKey
    })

    showMessage('Private Key has been saved.')
  }

  function isKeyValid() {
    if (privKey === '') return true
    try {
      if (nip19.decode(privKey).type === 'nsec') return true
    } catch (_) {}
    return false
  }

  function changeRelayURL(i, ev) {
    setRelays([
      ...relays.slice(0, i),
      { url: ev.target.value, policy: relays[i].policy },
      ...relays.slice(i + 1)
    ])
    addUnsavedChanges('relays')
  }

  function toggleRelayPolicy(i, cat) {
    setRelays([
      ...relays.slice(0, i),
      {
        url: relays[i].url,
        policy: { ...relays[i].policy, [cat]: !relays[i].policy[cat] }
      },
      ...relays.slice(i + 1)
    ])
    addUnsavedChanges('relays')
  }

  function removeRelay(i) {
    setRelays([...relays.slice(0, i), ...relays.slice(i + 1)])
    addUnsavedChanges('relays')
  }

  function addNewRelay() {
    if (newRelayURL.trim() === '') return
    if (!newRelayURL.startsWith('wss://')) return
    relays.push({
      url: newRelayURL,
      policy: { read: true, write: true }
    })
    setRelays(relays)
    addUnsavedChanges('relays')
    setNewRelayURL('')
  }

  async function handleRevoke(e) {
    const { host, accept, type } = e.target.dataset
    if (
      window.confirm(
        `revoke all ${
          accept === 'true' ? 'accept' : 'deny'
        } ${type} policies from ${host}?`
      )
    ) {
      await removePermissions(host, accept, type)
      showMessage('removed policies')
      loadPermissions()
    }
  }

  function handleNotifications() {
    setNotifications(!showNotifications)
    addUnsavedChanges('notifications')
    if (!showNotifications) requestBrowserNotificationPermissions()
  }

  async function requestBrowserNotificationPermissions() {
    const granted = await browser.permissions.request({
      permissions: ['notifications']
    })
    if (!granted) setNotifications(false)
  }

  async function saveNotifications() {
    await browser.storage.local.set({ notifications: showNotifications })
    showMessage('saved notifications!')
  }

  async function saveRelays() {
    await browser.storage.local.set({
      relays: Object.fromEntries(
        relays
          .filter(({ url }) => url.trim() !== '')
          .map(({ url, policy }) => [url.trim(), policy])
      )
    })
    showMessage('saved relays!')
  }

  function changeShowProtocolHandlerHelp() {
    setShowProtocolHandlerHelp(true)
  }

  function changeHandleNostrLinks() {
    if (handleNostrLinks) {
      setProtocolHandler('')
      addUnsavedChanges('protocol_handler')
    } else setShowProtocolHandlerHelp(true)
    setHandleNostrLinks(!handleNostrLinks)
  }

  function handleChangeProtocolHandler(e) {
    setProtocolHandler(e.target.value)
    addUnsavedChanges('protocol_handler')
  }

  async function saveNostrProtocolHandlerSettings() {
    await browser.storage.local.set({ protocol_handler: protocolHandler })
    showMessage('saved protocol handler!')
  }

  function addUnsavedChanges(section) {
    if (!unsavedChanges.find((s) => s === section)) {
      unsavedChanges.push(section)
      setUnsavedChanges(unsavedChanges)
    }
  }

  async function saveChanges() {
    for (const section of unsavedChanges) {
      switch (section) {
        case 'private_key':
          await saveKey()
          break
        case 'relays':
          await saveRelays()
          break
        case 'protocol_handler':
          await saveNostrProtocolHandlerSettings()
          break
        case 'notifications':
          await saveNotifications()
          break
      }
    }
    setUnsavedChanges([])
  }
}

render(<Options />, document.getElementById('main'))