<template>
  <div
    v-if="open"
    :style="`${mouseX !== -1 ? `--_mouse-x: ${mouseX};` : ''} ${mouseY !== -1 ? `--_mouse-y: ${mouseY};` : ''}`"
  >
    <div
      :class="{ shown: visible }"
      class="tauri-overlay"
      data-tauri-drag-region
      @click="() => (closeOnClickOutside && closable ? hide() : {})"
    />
    <div
      :class="{
        shown: visible,
        noblur: props.noblur,
        danger: danger,
      }"
      class="modal-overlay"
      @click="() => (closeOnClickOutside && closable ? hide() : {})"
    />
    <div class="modal-container experimental-styles-within" :class="{ shown: visible }">
      <div class="modal-body flex flex-col bg-bg-raised rounded-2xl">
        <div
          data-tauri-drag-region
          class="grid grid-cols-[auto_min-content] items-center gap-12 p-6 border-solid border-0 border-b-[1px] border-divider max-w-full"
        >
          <div class="flex text-wrap break-words items-center gap-3 min-w-0">
            <slot name="title">
              <span v-if="header" class="text-lg font-extrabold text-contrast">
                {{ header }}
              </span>
            </slot>
          </div>
          <ButtonStyled v-if="closable" circular>
            <button v-tooltip="'Close'" aria-label="Close" @click="hide">
              <XIcon aria-hidden="true" />
            </button>
          </ButtonStyled>
        </div>
        <div class="overflow-y-auto p-6">
          <slot> You just lost the game.</slot>
        </div>
      </div>
    </div>
  </div>
  <div v-else></div>
</template>

<script setup lang="ts">
import { XIcon } from '@modrinth/assets'
import { ref } from 'vue'
import ButtonStyled from '../base/ButtonStyled.vue'

const props = withDefaults(
  defineProps<{
    noblur?: boolean
    closable?: boolean
    danger?: boolean
    closeOnEsc?: boolean
    closeOnClickOutside?: boolean
    warnOnClose?: boolean
    header?: string
    onHide?: () => void
    onShow?: () => void
  }>(),
  {
    type: true,
    closable: true,
    danger: false,
    closeOnClickOutside: true,
    closeOnEsc: true,
    warnOnClose: false,
    header: undefined,
    onHide: () => {},
    onShow: () => {},
  },
)

const open = ref(false)
const visible = ref(false)

// make modal opening not shift page when there's a vertical scrollbar
function addBodyPadding() {
  const scrollBarWidth = window.innerWidth - document.documentElement.clientWidth
  if (scrollBarWidth > 0) {
    document.body.style.paddingRight = `${scrollBarWidth}px`
  } else {
    document.body.style.paddingRight = ''
  }
}

function show(event?: MouseEvent) {
  props.onShow()
  open.value = true

  addBodyPadding()
  document.body.style.overflow = 'hidden'
  window.addEventListener('mousedown', updateMousePosition)
  window.addEventListener('keydown', handleKeyDown)
  if (event) {
    updateMousePosition(event)
  } else {
    mouseX.value = window.innerWidth / 2
    mouseY.value = window.innerHeight / 2
  }
  setTimeout(() => {
    visible.value = true
  }, 50)
}

function hide() {
  props.onHide()
  visible.value = false
  document.body.style.overflow = ''
  document.body.style.paddingRight = ''
  window.removeEventListener('mousedown', updateMousePosition)
  window.removeEventListener('keydown', handleKeyDown)
  setTimeout(() => {
    open.value = false
  }, 300)
}

defineExpose({
  show,
  hide,
})

const mouseX = ref(-1)
const mouseY = ref(-1)

function updateMousePosition(event: { clientX: number; clientY: number }) {
  mouseX.value = event.clientX
  mouseY.value = event.clientY
}

function handleKeyDown(event: KeyboardEvent) {
  if (props.closeOnEsc && event.key === 'Escape') {
    hide()
    mouseX.value = window.innerWidth / 2
    mouseY.value = window.innerHeight / 2
  }
}
</script>

<style lang="scss" scoped>
.tauri-overlay {
  position: fixed;
  visibility: hidden;
  top: 0;
  left: 0;
  width: 100%;
  height: 100px;
  z-index: 20;

  &.shown {
    opacity: 1;
    visibility: visible;
  }
}

.modal-overlay {
  position: fixed;
  inset: -5rem;
  z-index: 19;
  opacity: 0;
  transition: all 0.2s ease-out;
  background: linear-gradient(to bottom, rgba(29, 48, 43, 0.52) 0%, rgba(14, 21, 26, 0.95) 100%);
  //transform: translate(
  //    calc((-50vw + var(--_mouse-x, 50vw) * 1px) / 2),
  //    calc((-50vh + var(--_mouse-y, 50vh) * 1px) / 2)
  //  )
  //  scaleX(0.8) scaleY(0.5);
  border-radius: 180px;
  //filter: blur(5px);

  @media (prefers-reduced-motion) {
    transition: none !important;
  }

  &.shown {
    opacity: 1;
    visibility: visible;
    backdrop-filter: blur(5px);
  }

  &.noblur {
    backdrop-filter: none;
    filter: none;
  }

  &.danger {
    background: linear-gradient(to bottom, rgba(43, 18, 26, 0.52) 0%, rgba(49, 10, 15, 0.95) 100%);
  }
}

.modal-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 21;
  visibility: hidden;
  pointer-events: none;
  transform: translate(
    calc((-50vw + var(--_mouse-x, 50vw) * 1px) / 16),
    calc((-50vh + var(--_mouse-y, 50vh) * 1px) / 16)
  );
  transition: all 0.2s ease-out;

  &.shown {
    visibility: visible;
    transform: translate(0, 0);

    > .modal-body {
      opacity: 1;
      visibility: visible;
      scale: 1;
    }
  }

  > .modal-body {
    position: fixed;
    box-shadow: 4px 4px 26px 10px rgba(0, 0, 0, 0.08);
    max-height: calc(100% - 2 * var(--gap-lg));
    max-width: min(var(--_max-width, 60rem), calc(100% - 2 * var(--gap-lg)));
    overflow-y: auto;
    overflow-x: hidden;
    width: fit-content;
    pointer-events: auto;
    scale: 0.97;

    visibility: hidden;
    opacity: 0;
    transition: all 0.2s ease-in-out;

    @media (prefers-reduced-motion) {
      transition: none !important;
    }

    @media screen and (max-width: 650px) {
      width: calc(100% - 2 * var(--gap-lg));
    }
  }
}
</style>
