<template>
  <div>
    <b-modal
      ref="modalEmissionManagerEdit"
      title="Edit a schedule"
      size="lg"
    >
      <p v-if="loaded.shows">
        Schedule for: <b>{{ selectedShow.name }}</b>
      </p>

      <div v-if="timeslot && loaded.schedule">
        This timeslot starts at
        <b-badge variant="info">
          {{ prettyDateTime(timeslot.start) }}
        </b-badge>
        and ends at
        <b-badge variant="info">
          {{ prettyDateTime(timeslot.end) }}
        </b-badge>

        <div v-if="schedule.rrule === 1">
          <p>
            This is a single emission.
            <span v-if="!loaded.scheduleTimeslots">
              <br>
              <img
                src="/assets/radio.gif"
                alt="loading schedule data"
              >
            </span>
            <span v-else>
              <span v-if="scheduleTimeslots.length > 1">
                But due to a previous conflict resolution there is a second timeslot, from
                <b-badge variant="info">
                  <span v-if="timeslot.start === scheduleTimeslots[0].start">{{ prettyDateTime(scheduleTimeslots[1].start) }}</span>
                  <span v-else>{{ prettyDateTime(scheduleTimeslots[0].start) }}</span>
                </b-badge>
                to
                <b-badge variant="info">
                  <span v-if="timeslot.start === scheduleTimeslots[0].start">{{ prettyDateTime(scheduleTimeslots[1].end) }}</span>
                  <span v-else>{{ prettyDateTime(scheduleTimeslots[0].end) }}</span>
                </b-badge>
                .
              </span>
              <span v-else>No other timeslots in this schedule.</span>
            </span>
          </p>
        </div>
        <div v-else>
          <p>This is a recurring event: <b>{{ rruleRender(schedule.rrule) }}</b>, until: {{ prettyDate(schedule.until) }}</p>
          <p>All timeslots of this schedule:</p>

          <b-table
            id="emission-table"
            striped
            :per-page="perPage"
            :current-page="currentPage"
            :fields="['start', 'end']"
            :items="scheduleTimeslots"
            :busy="!loaded.scheduleTimeslots"
            :tbody-tr-class="trClass"
          >
            <template v-slot:cell(start)="data">
              {{ prettyDateTime(data.item.start) }}
            </template>

            <template v-slot:cell(end)="data">
              {{ prettyDateTime(data.item.end) }}
            </template>
          </b-table>

          <div class="tw-w-full tw-flex tw-justify-end">
            <b-pagination
              v-model="currentPage"
              :total-rows="scheduleTimeslots.length"
              :per-page="perPage"
              aria-controls="emission-table"
            />
          </div>
        </div>
      </div>
      <div v-else>
        <img
          src="/assets/radio.gif"
          alt="loading schedule data"
        >
      </div>

      <hr>

      <h4>Add repetition of schedule</h4>

      <b-row>
        <b-col cols="6">
          <label class="tw-leading-loose">
            When to repeat?

            <b-form-select
              v-model="repetitionRule"
              :options="repetitionOptions"
            />
          </label>

          <b-checkbox v-model="useSameTime">
            Use same start and end time
          </b-checkbox>
        </b-col>
        <b-col
          v-if="!useSameTime"
          cols="6"
        >
          <label class="tw-leading-loose">
            Repeat at
            <b-form-input type="time" />
          </label>
        </b-col>
      </b-row>

      <b-row
        v-if="repetitionRule === 3"
        class="tw-mt-4"
      >
        <b-col cols="6">
          <label class="tw-leading-loose">
            How many days later?

            <b-form-input
              v-model="addNoOfDays"
              type="number"
            />
          </label>

          <b-checkbox v-model="onlyBusinessDays">
            Only count business days
          </b-checkbox>
        </b-col>
      </b-row>

      <b-row class="mt-4">
        <b-col>
          <b-button
            variant="primary"
            size="sm"
            @click="createRepetitionSchedule"
          >
            Create repetition schedule
          </b-button>
        </b-col>
      </b-row>

      <template v-slot:modal-footer>
        <div
          v-if="loaded.scheduleTimeslots"
          class="tw-w-full tw-flex tw-justify-between tw-items-center"
        >
          <div class="tw-space-x-2">
            <b-button
              variant="danger"
              size="sm"
              @click="deleteFullSchedule(schedule.id)"
            >
              <span v-if="scheduleTimeslots.length === 1">Delete</span>
              <span v-else-if="schedule.rrule === 1">Delete both</span>
              <span v-else>Delete schedule and all timeslots</span>
            </b-button>

            <b-button
              v-if="schedule.rrule > 1 && scheduleTimeslots.length > 1"
              variant="danger"
              size="sm"
              @click="deleteSingleTimeslot(schedule.id, timeslot.id)"
            >
              Delete this timeslot
            </b-button>

            <b-button
              v-if="schedule.rrule > 1 && scheduleTimeslots.length > 1"
              variant="danger"
              size="sm"
              @click="deleteAllFutureTimeslots(schedule.id, timeslot.id)"
            >
              Delete all timeslots
            </b-button>
          </div>
        </div>
        <div v-else>
          <img
            src="/assets/radio.gif"
            alt="loading timeslot data"
          >
        </div>
      </template>
    </b-modal>

    <b-modal
      ref="modalEmissionManagerDeleteTimeslots"
      title="Deleting timeslots"
      size="lg"
      centered
      hide-footer
      no-close-on-esc
      no-close-on-backdrop
    >
      <div>
        <img
          src="/assets/radio.gif"
          alt="loading schedule data"
        >
        <b-progress
          :value="deletion.count"
          :max="deletion.amount"
          variant="info"
          animated
        />
      </div>
    </b-modal>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'
import prettyDate from '../../mixins/prettyDate'
import rrules from '../../mixins/rrules'

export default {
  mixins: [ prettyDate, rrules ],

  data () {
    return {
      currentPage: 1,
      perPage: 5,
      timeslot: null,
      deletion: {
        amount: 0,
        count: 0,
      },
      useSameTime: true,
      onlyBusinessDays: false,
      addNoOfDays: 1,
      repetitionRule: 1,
      repetitionOptions: [
        { value: 1, text: "On the following day" },
        { value: 2, text: "On the following business day" },
        { value: 3, text: "Number of days later" },
        { value: 4, text: "Custom (WIP)" },
      ]
    }
  },

  computed: {
    loaded () {
      return {
        shows: this.$store.state.shows.loaded.shows,
        schedule: this.$store.state.shows.loaded.schedule,
        scheduleTimeslots: this.$store.state.shows.loaded.scheduleTimeslots,
      }
    },

    ...mapGetters({
      selectedShow: 'shows/selectedShow',
      schedule: 'shows/schedule',
      scheduleTimeslots: 'shows/scheduleTimeslots',
    })
  },

  methods: {
    trClass(item, type) {
      if (!item || type !== 'row') {
        return '';
      }

      return item.id === this.timeslot.id
              ? 'table-info'
              : ''
    },

    createRepetitionSchedule() {
      const { onlyBusinessDays, addNoOfDays } = this.getRepetitionParameters();
      const { dstart, tstart, tend, rrule, until, fallback_id, automation_id, byweekday } = this.schedule;

      const newSchedule = {
        schedule: {
          dstart,
          tstart,
          tend,
          rrule,
          until,
          fallback_id,
          automation_id,
          byweekday,
          is_repetition: true,
          add_business_days_only: onlyBusinessDays,
          add_days_no: addNoOfDays,
        }
      };

      this.$store.dispatch('shows/submitSchedule', {
        showId: this.selectedShow.id,
        schedule: newSchedule,
        callback: (response) => {
          if (response.data.projected === undefined) {
            this.$parent.renderView(null)
          } else {
            this.$log.debug('Timeslot conflict. Switching to resolve mode.');
            this.$parent.resolve(response.data)
          }
          this.$refs.modalEmissionManagerEdit.hide()
        },
      });
    },

    deleteFullSchedule (id) {
      this.$store.dispatch('shows/deleteSchedule', {
        show: this.selectedShow.id,
        schedule: id,
        callback: () => {
          this.$refs.modalEmissionManagerEdit.hide();
          this.$parent.renderView(null)
        }
      })
    },

    deleteSingleTimeslot (scheduleId, timeslotId) {
      this.$store.dispatch('shows/deleteTimeslot', {
        show: this.selectedShow.id,
        schedule: scheduleId,
        timeslot: timeslotId,
        callback: () => {
          this.$refs.modalEmissionManagerEdit.hide()
          this.$parent.renderView(null)
        }
      })
    },

    deleteAllFutureTimeslots (scheduleId) {
      let startDate = new Date(this.timeslot.start)
      let toDelete = []
      for (let slot of this.scheduleTimeslots) {
        if (new Date(slot.start) >= startDate) {
          toDelete.push(slot.id)
        }
      }

      if (toDelete.length === this.scheduleTimeslots.length) {
        this.$log.debug('deleting full schedule')
        this.deleteFullSchedule(scheduleId)
      }

      else {
        this.deletion.amount = toDelete.length
        this.deletion.count = 0
        this.$refs.modalEmissionManagerDeleteTimeslots.show()

        for (let i in toDelete) {
          this.$log.debug('Deleting timeslot', toDelete[i])
          this.$store.dispatch('shows/deleteTimeslot', {
            show: this.selectedShow.id,
            schedule: scheduleId,
            timeslot: toDelete[i],
            callback: () => {
              this.deletion.count++
              this.$log.debug('deleted ' + this.deletion.count + ' timeslots')
              if (this.deletion.count === this.deletion.amount) {
                this.$parent.renderView(null)
                this.$refs.modalEmissionManagerDeleteTimeslots.hide()
                this.$refs.modalEmissionManagerEdit.hide()
              }
            }
          })
        }
      }
    },

    loadSchedule (scheduleId) {
      this.$store.dispatch('shows/fetchSchedule', {
        show: this.selectedShow.id,
        schedule: scheduleId,
        callback: () => {
          this.loadScheduleTimeslots(scheduleId)
        }
      })
    },

    loadScheduleTimeslots (scheduleId) {
      this.$store.dispatch('shows/fetchTimeslots', {
        id: this.selectedShow.id,
        schedule: scheduleId,
        start: this.schedule.dstart,
        end: this.schedule.until,
      })
    },

    getRepetitionParameters() {
      if (this.repetitionRule == 1) {
        return {
          onlyBusinessDays: false,
          addNoOfDays: 1,
        }
      }

      if (this.repetitionRule == 2) {
        return {
          onlyBusinessDays: true,
          addNoOfDays: 1,
        }
      }

      return {
        onlyBusinessDays: this.onlyBusinessDays,
        addNoOfDays: this.addNoOfDays,
      }
    },

    // initialise a new schedule and open the modal
    open (timeslot) {
      this.timeslot = timeslot
      this.$refs.modalEmissionManagerEdit.show()
      this.loadSchedule(timeslot.schedule)
    },

  }
}
</script>

<style scoped>
</style>