import PropTypes from '../_util/vue-types'
import BaseMixin from '../_util/BaseMixin'
import Header from './Header'
import Combobox from './Combobox'
import moment from 'moment'

function noop () {
}

function generateOptions (length, disabledOptions, hideDisabledOptions, step = 1) {
  const arr = []
  for (let value = 0; value < length; value += step) {
    if (!disabledOptions || disabledOptions.indexOf(value) < 0 || !hideDisabledOptions) {
      arr.push(value)
    }
  }
  return arr
}
const Panel = {
  mixins: [BaseMixin],
  props: {
    clearText: PropTypes.string,
    prefixCls: PropTypes.string.def('rc-time-picker-panel'),
    defaultOpenValue: {
      type: Object,
      default: () => {
        return moment()
      },
    },
    value: PropTypes.any,
    defaultValue: PropTypes.any,
    placeholder: PropTypes.string,
    format: PropTypes.string,
    inputReadOnly: PropTypes.bool.def(false),
    disabledHours: PropTypes.func.def(noop),
    disabledMinutes: PropTypes.func.def(noop),
    disabledSeconds: PropTypes.func.def(noop),
    hideDisabledOptions: PropTypes.bool,
    // onChange: PropTypes.func,
    // onEsc: PropTypes.func,
    allowEmpty: PropTypes.bool,
    showHour: PropTypes.bool,
    showMinute: PropTypes.bool,
    showSecond: PropTypes.bool,
    // onClear: PropTypes.func,
    use12Hours: PropTypes.bool.def(false),
    hourStep: PropTypes.number,
    minuteStep: PropTypes.number,
    secondStep: PropTypes.number,
    focusOnOpen: PropTypes.bool,
    // onKeydown: PropTypes.func,
  },
  data () {
    return {
      sValue: this.value,
      selectionRange: [],
      currentSelectPanel: '',
      showStr: true,
    }
  },
  watch: {
    value (val) {
      if (val) {
        this.setState({
          sValue: val,
          showStr: true,
        })
      } else {
        this.setState({
          showStr: false,
        })
      }
    },
  },

  methods: {
    onChange (newValue) {
      this.setState({ sValue: newValue })
      this.__emit('change', newValue)
    },

    onCurrentSelectPanelChange (currentSelectPanel) {
      this.setState({ currentSelectPanel })
    },

    // https://github.com/ant-design/ant-design/issues/5829
    close () {
      this.__emit('esc')
    },

    disabledHours2 () {
      const { use12Hours, disabledHours } = this
      let disabledOptions = disabledHours()
      if (use12Hours && Array.isArray(disabledOptions)) {
        if (this.isAM()) {
          disabledOptions = disabledOptions.filter(h => h < 12).map(h => (h === 0 ? 12 : h))
        } else {
          disabledOptions = disabledOptions.map(h => (h === 12 ? 12 : h - 12))
        }
      }
      return disabledOptions
    },

    isAM () {
      const value = this.sValue || this.defaultOpenValue
      return value.hour() >= 0 && value.hour() < 12
    },
  },

  render () {
    const {
      prefixCls, placeholder, disabledMinutes,
      disabledSeconds, hideDisabledOptions, allowEmpty, showHour, showMinute, showSecond,
      format, defaultOpenValue, clearText, use12Hours,
      focusOnOpen, hourStep, minuteStep, secondStep, inputReadOnly,
      sValue, currentSelectPanel, showStr, $listeners = {},
    } = this
    const { esc = noop, clear = noop, keydown = noop } = $listeners

    const disabledHourOptions = this.disabledHours2()
    const disabledMinuteOptions = disabledMinutes(sValue ? sValue.hour() : null)
    const disabledSecondOptions = disabledSeconds(sValue ? sValue.hour() : null,
      sValue ? sValue.minute() : null)
    const hourOptions = generateOptions(
      24, disabledHourOptions, hideDisabledOptions, hourStep
    )
    const minuteOptions = generateOptions(
      60, disabledMinuteOptions, hideDisabledOptions, minuteStep
    )
    const secondOptions = generateOptions(
      60, disabledSecondOptions, hideDisabledOptions, secondStep
    )

    return (
      <div class={`${prefixCls}-inner`}>
        <Header
          clearText={clearText}
          prefixCls={prefixCls}
          defaultOpenValue={defaultOpenValue}
          value={sValue}
          currentSelectPanel={currentSelectPanel}
          onEsc={esc}
          format={format}
          placeholder={placeholder}
          hourOptions={hourOptions}
          minuteOptions={minuteOptions}
          secondOptions={secondOptions}
          disabledHours={this.disabledHours2}
          disabledMinutes={disabledMinutes}
          disabledSeconds={disabledSeconds}
          onChange={this.onChange}
          onClear={clear}
          allowEmpty={allowEmpty}
          focusOnOpen={focusOnOpen}
          onKeydown={keydown}
          inputReadOnly={inputReadOnly}
          showStr={showStr}
        />
        <Combobox
          prefixCls={prefixCls}
          value={sValue}
          defaultOpenValue={defaultOpenValue}
          format={format}
          onChange={this.onChange}
          showHour={showHour}
          showMinute={showMinute}
          showSecond={showSecond}
          hourOptions={hourOptions}
          minuteOptions={minuteOptions}
          secondOptions={secondOptions}
          disabledHours={this.disabledHours2}
          disabledMinutes={disabledMinutes}
          disabledSeconds={disabledSeconds}
          onCurrentSelectPanelChange={this.onCurrentSelectPanelChange}
          use12Hours={use12Hours}
          isAM={this.isAM()}
        />
        {this.$slots.default}
      </div>
    )
  },
}

export default Panel