import KeyCode from '../_util/KeyCode';
import TextArea from '../input/TextArea';
import EnterOutlined from '@ant-design/icons-vue/EnterOutlined';
import type { ExtractPropTypes, PropType } from 'vue';
import { defineComponent, ref, reactive, watch, onMounted, toRefs } from 'vue';
import type { Direction } from '../config-provider';
import type { ChangeEventHandler } from '../_util/EventInterface';
import type { AutoSizeType } from '../input/inputProps';
import classNames from '../_util/classNames';

// CSSINJS
import useStyle from './style';

const editableProps = () => ({
  prefixCls: String,
  value: String,
  maxlength: Number,
  autoSize: { type: [Boolean, Object] as PropType<boolean | AutoSizeType> },
  onSave: Function as PropType<(val: string) => void>,
  onCancel: Function as PropType<() => void>,
  onEnd: Function as PropType<() => void>,
  onChange: Function as PropType<(val: string) => void>,
  originContent: String,
  direction: String as PropType<Direction>,
  component: String,
});
export type EditableProps = Partial<ExtractPropTypes<ReturnType<typeof editableProps>>>;
const Editable = defineComponent({
  name: 'Editable',
  inheritAttrs: false,
  props: editableProps(),
  // emits: ['save', 'cancel', 'end', 'change'],
  setup(props, { emit, slots, attrs }) {
    const { prefixCls } = toRefs(props);
    const state = reactive({
      current: props.value || '',
      lastKeyCode: undefined,
      inComposition: false,
      cancelFlag: false,
    });
    watch(
      () => props.value,
      current => {
        state.current = current;
      },
    );

    const textArea = ref();

    onMounted(() => {
      if (textArea.value) {
        const resizableTextArea = textArea.value?.resizableTextArea;
        const innerTextArea = resizableTextArea?.textArea;
        innerTextArea.focus();
        const { length } = innerTextArea.value;
        innerTextArea.setSelectionRange(length, length);
      }
    });

    function saveTextAreaRef(node: any) {
      textArea.value = node;
    }

    function onChange({ target: { value } }) {
      state.current = value.replace(/[\r\n]/g, '');
      emit('change', state.current);
    }

    function onCompositionStart() {
      state.inComposition = true;
    }

    function onCompositionEnd() {
      state.inComposition = false;
    }

    function onKeyDown(e: KeyboardEvent) {
      const { keyCode } = e;
      if (keyCode === KeyCode.ENTER) {
        e.preventDefault();
      }
      // We don't record keyCode when IME is using
      if (state.inComposition) return;

      state.lastKeyCode = keyCode;
    }

    function onKeyUp(e: KeyboardEvent) {
      const { keyCode, ctrlKey, altKey, metaKey, shiftKey } = e;

      // Check if it's a real key
      if (
        state.lastKeyCode === keyCode &&
        !state.inComposition &&
        !ctrlKey &&
        !altKey &&
        !metaKey &&
        !shiftKey
      ) {
        if (keyCode === KeyCode.ENTER) {
          confirmChange();
          emit('end');
        } else if (keyCode === KeyCode.ESC) {
          state.current = props.originContent;
          emit('cancel');
        }
      }
    }

    function onBlur() {
      confirmChange();
    }

    function confirmChange() {
      emit('save', state.current.trim());
    }

    // style
    const [wrapSSR, hashId] = useStyle(prefixCls);

    return () => {
      const textAreaClassName = classNames(
        {
          [`${prefixCls.value}`]: true,
          [`${prefixCls.value}-edit-content`]: true,
          [`${prefixCls.value}-rtl`]: props.direction === 'rtl',
          [props.component ? `${prefixCls.value}-${props.component}` : '']: true,
        },
        attrs.class,
        hashId.value,
      );

      return wrapSSR(
        <div {...attrs} class={textAreaClassName}>
          <TextArea
            ref={saveTextAreaRef}
            maxlength={props.maxlength}
            value={state.current}
            onChange={onChange as ChangeEventHandler}
            onKeydown={onKeyDown}
            onKeyup={onKeyUp}
            onCompositionstart={onCompositionStart}
            onCompositionend={onCompositionEnd}
            onBlur={onBlur}
            rows={1}
            autoSize={props.autoSize === undefined || props.autoSize}
          />
          {slots.enterIcon ? (
            slots.enterIcon({ className: `${props.prefixCls}-edit-content-confirm` })
          ) : (
            <EnterOutlined class={`${props.prefixCls}-edit-content-confirm`} />
          )}
        </div>,
      );
    };
  },
});

export default Editable;
