<template>
  <BasicModal
    title="جزئیات دوره"
    title-en="details"
    width="95%"
    max-width="80rem"
    min-width="auto"
    :show-close-button="true"
  >
    <template #default="{ close }">
      <div class="course-details">
        <SkeletonLoaderBlock v-if="isLoading" :rows="3" :cols-per-row="1" />

        <template v-else-if="course">
          <div class="course-details__hero">
            <div class="course-details__image">
              <img v-if="course.image" :src="course.image" :alt="course.title" />
              <SvgIcon v-else name="book" :size="32" color="#bcbcbc" />
            </div>
            <div class="course-details__grid">
              <LineInfoBlock title="عنوان دوره" :desc="course.title || '—'" />
              <LineInfoBlock title="تعداد جلسات" :numeric-desc="course.sessionsCount ?? 0" />
              <LineInfoBlock title="پیش‌نیاز دوره" :desc="prerequisiteCourses" />
            </div>
          </div>

          <div v-if="course.description" class="course-details__description">
            <LineInfoBlock title="توضیحات دوره" :desc="course.description" />
          </div>

          <section class="course-details__sessions">
            <div class="course-details__panel-header">
              <LineTitleBlock title="لیست جلسات" title-en="Sessions" />
              <BaseButton
                text="افزودن جلسه به این دوره"
                custom-class="course-details__panel-btn"
                @click="onOpenAddSession"
              >
                <template #appendIcon>
                  <SvgIcon name="arrow-left" :size="16" color="#fff" />
                </template>
              </BaseButton>
            </div>

            <SkeletonLoaderBlock v-if="sessionsPending" :rows="4" :cols-per-row="1" />
            <div v-else-if="sessions.length > 0">
              <CourseSessionItem v-for="session in sessions" :key="session.id" :session="session" />
            </div>
            <NoItems v-else title="بدون جلسه" desc="جلسه‌ای برای این دوره ثبت نشده است." />

            <PaginationBlock
              v-if="sessionsPaginationMeta.lastPage > 1"
              :pagination="sessionsPaginationMeta"
              @update:page="setSessionsPage"
            />
          </section>
        </template>

        <NoItems v-else title="یافت نشد" desc="اطلاعات این دوره در دسترس نیست." />

        <div class="course-details__divider" />

        <div class="course-details__footer">
          <BaseButton text="تایید" custom-class="course-details__close-btn" @click="close">
            <template #appendIcon>
              <SvgIcon name="arrow-left" :size="18" color="#fff" />
            </template>
          </BaseButton>
        </div>
      </div>
    </template>
  </BasicModal>
</template>

<script setup>
import { computed } from 'vue'
import useModal from '@/composables/useModal'
import BasicModal from '@/components/BasicModal.vue'
import BaseButton from '@/components/BaseButton.vue'
import SvgIcon from '@/components/icons/SvgIcon.vue'
import NoItems from '@/components/blocks/NoItems.vue'
import { usePagination } from '@/composables/usePagination'
import LineTitleBlock from '@/components/LineTitleBlock.vue'
import LineInfoBlock from '@/components/blocks/LineInfoBlock.vue'
import { useAdminCourseQuery } from '@/services/query/admin-courses'
import PaginationBlock from '@/components/blocks/PaginationBlock.vue'
import { useAdminSessionsListQuery } from '@/services/query/admin-sessions'
import SkeletonLoaderBlock from '@/components/blocks/SkeletonLoaderBlock.vue'
import CourseSessionItem from '@/features/admin/courses/components/CourseSessionItem.vue'

defineOptions({ name: 'CourseDetailsModal' })

const { openModal, getModal } = useModal()

const modalData = computed(() => getModal('CourseDetailsModal')?.data ?? {})
const courseId = computed(() => modalData.value.id ?? null)

const { data: course, isLoading } = useAdminCourseQuery(courseId, {
  enabled: () => !!courseId.value,
})

const prerequisiteCourses = computed(() =>
  course.value.prerequisiteCourses.map((course_) => course_.title).join(' ,')
)

const sessionsFilters = computed(() => ({ courseId: courseId.value }))
const { pagination: sessionsPagination, setPage: setSessionsPage } = usePagination({
  page: 1,
  perPage: 10,
})

const { data: sessionsData, isLoading: sessionsPending } = useAdminSessionsListQuery(
  sessionsFilters,
  sessionsPagination,
  {
    enabled: () => !!courseId.value,
    keepPreviousData: true,
  }
)

const sessions = computed(() => sessionsData.value?.data ?? [])
const sessionsPaginationMeta = computed(() => ({
  page: sessionsPagination.value.page,
  perPage: sessionsPagination.value.perPage,
  ...sessionsData.value?.meta,
}))

const onOpenAddSession = () => {
  openModal('AddSessionToCourseModal', { courseId: courseId.value })
}
</script>

<style lang="scss" scoped>
.course-details {
  width: 100%;
  text-align: start;

  &__hero {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin: 1rem 0 0.5rem;

    @media (max-width: 768px) {
      flex-direction: column;
    }
  }

  &__image {
    width: 5rem;
    height: 5rem;
    border-radius: 0.5rem;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;

    img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
  }

  &__grid {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.25rem;

    @media (min-width: 768px) {
      grid-template-columns: repeat(3, 1fr);
    }

    @media (min-width: 1280px) {
      grid-template-columns: repeat(5, 1fr);
    }
  }

  &__description {
    margin-block: 0.5rem 1rem;
  }

  &__sessions {
    margin-top: 0.5rem;
  }

  &__panel-header {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.5rem;
  }

  &__panel-btn {
    min-width: 14rem;
    padding: 0 1rem;
    margin-inline-start: auto;
  }

  &__divider {
    border-block-end: 1px solid var(--color-thd-gray);
    margin-block: 1.5rem;
  }

  &__footer {
    display: flex;
    justify-content: flex-end;
  }

  &__close-btn {
    min-width: 12rem;
  }
}
</style>
