const api = window.dshDesktop

async function main() {
  const locale = await api.locale()
  const messages = locale.messages
  const message = (key, values = {}) => messages[key].replaceAll(/\{([^{}]+)\}/gu, (placeholder, name) => values[name] ?? placeholder)
  document.documentElement.lang = locale.id
  document.querySelector('#page-title').textContent = messages.pluginManagerTitle
  document.querySelector('#title').textContent = messages.pluginManagerTitle
  document.querySelector('#description').textContent = messages.pluginManagerDescription
  document.querySelector('#refresh').textContent = messages.refresh
  document.querySelector('#package-label').textContent = messages.npmPackage
  document.querySelector('#install').textContent = messages.install
  document.querySelector('#installed-heading').textContent = messages.installed
  document.querySelector('#empty').textContent = messages.noPlugins


  const list = document.querySelector('#plugins')
  const empty = document.querySelector('#empty')
  const status = document.querySelector('#status')
  const form = document.querySelector('#install-form')
  const input = document.querySelector('#package-spec')
  const refresh = document.querySelector('#refresh')
  const updateForm = document.querySelector('#update-form')
  const updateVersion = document.querySelector('#update-version')
  let updateName = ''
  let updateTrigger
  document.querySelector('#update-submit').textContent = messages.update
  document.querySelector('#update-cancel').textContent = messages.cancel

  function setBusy(busy, statusMessage = '') {
    for (const control of document.querySelectorAll('button, input')) control.disabled = busy
    status.textContent = statusMessage
  }

  async function render() {
    const plugins = await api.plugins.list()
    list.replaceChildren(...plugins.map(plugin => {
      const item = document.createElement('li')
      const identity = document.createElement('span')
      const version = document.createElement('span')
      version.className = 'package-version'
      version.textContent = plugin.enabled ? plugin.version : `${plugin.version} · ${messages.disabled}`
      identity.append(document.createTextNode(plugin.name), version)
      const remove = document.createElement('button')
      remove.type = 'button'
      remove.textContent = messages.remove
      remove.addEventListener('click', () => void run(
        () => api.plugins.remove(plugin.name),
        message('removing', { name: plugin.name }),
      ))
      const update = document.createElement('button')
      update.type = 'button'
      update.textContent = messages.update
      update.addEventListener('click', () => {
        updateName = plugin.name
        updateTrigger = update
        document.querySelector('#update-label').textContent = message('targetVersion', { name: plugin.name })
        updateVersion.value = plugin.version
        updateForm.hidden = false
        updateVersion.focus()
        updateVersion.select()
      })
      const actions = document.createElement('span')
      actions.className = 'package-actions'
      const toggle = document.createElement('button')
      toggle.type = 'button'
      toggle.textContent = plugin.enabled ? messages.disable : messages.enable
      toggle.addEventListener('click', () => void run(
        () => api.plugins.toggle(plugin.name, !plugin.enabled), messages.changingActivation,
      ))
      actions.append(toggle, update, remove)
      item.append(identity, actions)
      return item
    }))
    empty.hidden = plugins.length !== 0
  }

  async function run(operation, statusMessage) {
    setBusy(true, statusMessage)
    try {
      await operation()
      await render()
      status.textContent = messages.operationComplete
    } catch (error) {
      status.textContent = error instanceof Error ? error.message : String(error)
    } finally {
      setBusy(false, status.textContent)
    }
  }

  async function load(statusMessage, success) {
    setBusy(true, statusMessage)
    try {
      await render()
      status.textContent = success
    } catch (error) {
      status.textContent = error instanceof Error ? error.message : String(error)
    } finally {
      setBusy(false, status.textContent)
    }
  }

  form.addEventListener('submit', (event) => {
    event.preventDefault()
    const spec = input.value.trim()
    if (spec === '') return
    void run(async () => {
      await api.plugins.add(spec)
      input.value = ''
    }, message('installing', { spec }))
  })
  updateForm.addEventListener('submit', (event) => {
    event.preventDefault()
    const version = updateVersion.value.trim()
    if (version === '') return
    const name = updateName
    updateForm.hidden = true
    void run(() => api.plugins.update(name, version), message('updating', { name }))
  })
  document.querySelector('#update-cancel').addEventListener('click', () => {
    updateForm.hidden = true
    updateTrigger.focus()
  })
  refresh.addEventListener('click', () => void load(messages.refreshing, messages.refreshed))

  await load(messages.loadingPlugins, '')
}

void main()