import { h, reactive, createApp } from '@vue/runtime-dom'
import { CompilerOptions } from '@vue/compiler-dom'

export const compilerOptions: CompilerOptions = reactive({
  mode: 'module',
  prefixIdentifiers: false,
  hoistStatic: false,
  cacheHandlers: false,
  scopeId: null
})

const App = {
  setup() {
    return () => {
      const usePrefix =
        compilerOptions.prefixIdentifiers || compilerOptions.mode === 'module'
      return [
        h('h1', `Vue 3 Template Explorer`),
        h(
          'a',
          {
            href: `https://github.com/vuejs/vue-next/tree/${__COMMIT__}`,
            target: `_blank`
          },
          `@${__COMMIT__}`
        ),
        h('div', { id: 'options' }, [
          // mode selection
          h('span', { class: 'options-group' }, [
            h('span', { class: 'label' }, 'Mode:'),
            h('input', {
              type: 'radio',
              id: 'mode-module',
              name: 'mode',
              checked: compilerOptions.mode === 'module',
              onChange() {
                compilerOptions.mode = 'module'
              }
            }),
            h('label', { for: 'mode-module' }, 'module'),
            h('input', {
              type: 'radio',
              id: 'mode-function',
              name: 'mode',
              checked: compilerOptions.mode === 'function',
              onChange() {
                compilerOptions.mode = 'function'
              }
            }),
            h('label', { for: 'mode-function' }, 'function')
          ]),

          // toggle prefixIdentifiers
          h('input', {
            type: 'checkbox',
            id: 'prefix',
            disabled: compilerOptions.mode === 'module',
            checked: usePrefix,
            onChange(e: Event) {
              compilerOptions.prefixIdentifiers =
                (<HTMLInputElement>e.target).checked ||
                compilerOptions.mode === 'module'
            }
          }),
          h('label', { for: 'prefix' }, 'prefixIdentifiers'),

          // toggle hoistStatic
          h('input', {
            type: 'checkbox',
            id: 'hoist',
            checked: compilerOptions.hoistStatic,
            onChange(e: Event) {
              compilerOptions.hoistStatic = (<HTMLInputElement>e.target).checked
            }
          }),
          h('label', { for: 'hoist' }, 'hoistStatic'),

          // toggle cacheHandlers
          h('input', {
            type: 'checkbox',
            id: 'cache',
            checked: usePrefix && compilerOptions.cacheHandlers,
            disabled: !usePrefix,
            onChange(e: Event) {
              compilerOptions.cacheHandlers = (<HTMLInputElement>(
                e.target
              )).checked
            }
          }),
          h('label', { for: 'cache' }, 'cacheHandlers'),

          // toggle scopeId
          h('input', {
            type: 'checkbox',
            id: 'scope-id',
            disabled: compilerOptions.mode !== 'module',
            checked:
              compilerOptions.mode === 'module' && compilerOptions.scopeId,
            onChange(e: Event) {
              compilerOptions.scopeId =
                compilerOptions.mode === 'module' &&
                (<HTMLInputElement>e.target).checked
                  ? 'scope-id'
                  : null
            }
          }),
          h('label', { for: 'scope-id' }, 'scopeId')
        ])
      ]
    }
  }
}

export function initOptions() {
  createApp().mount(App, document.getElementById('header')!)
}