<script lang="ts">
  import type {Snippet} from "svelte"
  import {writable} from "svelte/store"
  import {randomId, HOUR} from "@welshman/lib"
  import {makeEvent, EVENT_TIME} from "@welshman/util"
  import {publishThunk} from "@welshman/app"
  import {preventDefault} from "@lib/html"
  import {daysBetween} from "@lib/util"
  import GallerySend from "@assets/icons/gallery-send.svg?dataurl"
  import MapPoint from "@assets/icons/map-point.svg?dataurl"
  import AltArrowLeft from "@assets/icons/alt-arrow-left.svg?dataurl"
  import Icon from "@lib/components/Icon.svelte"
  import Field from "@lib/components/Field.svelte"
  import Button from "@lib/components/Button.svelte"
  import Spinner from "@lib/components/Spinner.svelte"
  import ModalFooter from "@lib/components/ModalFooter.svelte"
  import Modal from "@lib/components/Modal.svelte"
  import ModalBody from "@lib/components/ModalBody.svelte"
  import DateTimeInput from "@lib/components/DateTimeInput.svelte"
  import EditorContent from "@app/editor/EditorContent.svelte"
  import {PROTECTED} from "@app/core/state"
  import {makeEditor} from "@app/editor"
  import {pushToast} from "@app/util/toast"
  import {canEnforceNip70} from "@app/core/commands"

  type Props = {
    url: string
    h?: string
    header: Snippet
    initialValues?: {
      d: string
      title: string
      content: string
      location: string
      start: number
      end: number
    }
  }

  const {url, h, header, initialValues}: Props = $props()

  const shouldProtect = canEnforceNip70(url)

  const uploading = writable(false)

  const back = () => history.back()

  const selectFiles = () => editor.then(ed => ed.chain().selectFiles().run())

  const submit = async () => {
    if ($uploading) return

    if (!title) {
      return pushToast({
        theme: "error",
        message: "Please provide a title.",
      })
    }

    if (!start || !end) {
      return pushToast({
        theme: "error",
        message: "Please provide start and end times.",
      })
    }

    if (start >= end) {
      return pushToast({
        theme: "error",
        message: "End time must be later than start time.",
      })
    }

    const ed = await editor
    const content = ed.getText({blockSeparator: "\n"}).trim()
    const tags = [
      ["d", initialValues?.d || randomId()],
      ["title", title],
      ["location", location || ""],
      ["start", start.toString()],
      ["end", end.toString()],
      ...daysBetween(start, end).map(D => ["D", D.toString()]),
      ...ed.storage.nostr.getEditorTags(),
    ]

    if (await shouldProtect) {
      tags.push(PROTECTED)
    }

    if (h) {
      tags.push(["h", h])
    }

    const event = makeEvent(EVENT_TIME, {content, tags})

    pushToast({message: "Your event has been saved!"})
    publishThunk({event, relays: [url]})
    history.back()
  }

  const content = initialValues?.content || ""
  const editor = makeEditor({url, submit, uploading, content})

  let title = $state(initialValues?.title || "")
  let location = $state(initialValues?.location || "")
  let start: number | undefined = $state(initialValues?.start)
  let end: number | undefined = $state(initialValues?.end)
  let endDirty = Boolean(initialValues?.end)

  $effect(() => {
    if (!endDirty && start) {
      end = start + HOUR
    } else if (end) {
      endDirty = true
    }
  })
</script>

<Modal tag="form" novalidate onsubmit={preventDefault(submit)}>
  <ModalBody>
    {@render header()}
    <Field>
      {#snippet label()}
        <p>Title*</p>
      {/snippet}
      {#snippet input()}
        <label class="input input-bordered flex w-full items-center gap-2">
          <input bind:value={title} class="grow" type="text" />
        </label>
      {/snippet}
    </Field>
    <Field>
      {#snippet label()}
        <p>Summary</p>
      {/snippet}
      {#snippet input()}
        <div
          class="relative z-feature flex gap-2 border-t border-solid border-base-100 bg-base-100">
          <div class="input-editor flex-grow overflow-hidden">
            <EditorContent {editor} />
          </div>
          <Button data-tip="Add an image" class="center btn tooltip" onclick={selectFiles}>
            {#if $uploading}
              <span class="loading loading-spinner loading-xs"></span>
            {:else}
              <Icon icon={GallerySend} />
            {/if}
          </Button>
        </div>
      {/snippet}
    </Field>
    <Field>
      {#snippet label()}
        Start*
      {/snippet}
      {#snippet input()}
        <DateTimeInput bind:value={start} />
      {/snippet}
    </Field>
    <Field>
      {#snippet label()}
        End*
      {/snippet}
      {#snippet input()}
        <DateTimeInput bind:value={end} />
      {/snippet}
    </Field>
    <Field>
      {#snippet label()}
        <p>Location (optional)</p>
      {/snippet}
      {#snippet input()}
        <label class="input input-bordered flex w-full items-center gap-2">
          <Icon icon={MapPoint} />
          <input bind:value={location} class="grow" type="text" />
        </label>
      {/snippet}
    </Field>
  </ModalBody>
  <ModalFooter>
    <Button class="btn btn-link" onclick={back}>
      <Icon icon={AltArrowLeft} />
      Go back
    </Button>
    <Button type="submit" class="btn btn-primary" disabled={$uploading}>
      <Spinner loading={$uploading}>Save Event</Spinner>
    </Button>
  </ModalFooter>
</Modal>
