<script lang="ts">
  import EditLayerState from "./EditLayerState";
  import type { ConfigMeta } from "./configMeta";
  import { UIEventSource } from "../../Logic/UIEventSource";
  import SchemaBasedInput from "./SchemaBasedInput.svelte";
  import SchemaBasedField from "./SchemaBasedField.svelte";
  import { TrashIcon } from "@babeard/svelte-heroicons/mini";
  import QuestionPreview from "./QuestionPreview.svelte";
  import SchemaBasedMultiType from "./SchemaBasedMultiType.svelte";
  import ShowConversionMessage from "./ShowConversionMessage.svelte";

  export let state: EditLayerState;
  export let schema: ConfigMeta;


  let title = schema.path.at(-1);
  let singular = title;
  if (title?.endsWith("s")) {
    singular = title.slice(0, title.length - 1);
  }
  let article = "a";
  if (singular?.match(/^[aeoui]/)) {
    article = "an";
  }
  export let path: (string | number)[] = [];
  
  const isTagRenderingBlock = path.length === 1 && path[0] === "tagRenderings";

  if (isTagRenderingBlock) {
    schema = { ...schema };
    schema.description = undefined;
  }

  const subparts: ConfigMeta = state.getSchemaStartingWith(schema.path)
    .filter(part => part.path.length - 1 === schema.path.length);
  
  let messages = state.messagesFor(path)
  
  
  const currentValue : UIEventSource<any[]> = state.getStoreFor(path);
  if(currentValue.data === undefined){
    currentValue.setData([])
  }

  function createItem(valueToSet?: any) {
    if(currentValue.data === undefined){
      currentValue.setData([])
    }
    currentValue.data.push(valueToSet)
    currentValue.ping()
    
    if(isTagRenderingBlock){
        state.highlightedItem.setData({path: [...path, currentValue.data.length - 1], schema})
    }
  }

  function fusePath(i: number, subpartPath: string[]): (string | number)[] {
    const newPath = [...path, i];
    const toAdd = [...subpartPath];
    for (const part of path) {
      if (toAdd[0] === part) {
        toAdd.splice(0, 1);
      }else{
        break
      }
    }
    newPath.push(...toAdd);
    console.log({newPath})
    return newPath;
  }

  function schemaForMultitype() {
    const sch = {...schema}
    sch.hints.typehint = undefined
    return sch
  }
  
  
  function del(i: number){
    currentValue.data.splice(i, 1)
    currentValue.ping()
  }
  
  function swap(i: number, j: number) {
    const x = currentValue.data[i]
    currentValue.data[i] = currentValue.data[j] 
    currentValue.data[j] = x
    currentValue.ping()
  }
  
  function moveTo(source: number, target: number){
    const x = currentValue.data[source]
    currentValue.data.splice(source, 1)
    currentValue.data.splice(target, 0, x)
    currentValue.ping()
  }


</script>
<div class="pl-2">
  <h3>{schema.path.at(-1)}</h3>

  {#if subparts.length > 0}
        <span class="subtle">
            {schema.description}
        </span>
  {/if}
  {#if $currentValue === undefined}
      No array defined
  {:else if $currentValue.length === 0}
    No values are defined
    {#if $messages.length > 0}
      {#each $messages as message}
        <ShowConversionMessage {message}/>
      {/each}
    {/if}
  {:else if subparts.length === 0}
    <!-- We need an array of values, so we use the typehint of the _parent_ element as field -->
    {#each $currentValue as value, i}
      <div class="flex w-full">
        <SchemaBasedField {state} {schema} path={[...path, i]} />
        <button class="border-black border rounded-full p-1 w-fit h-fit"
                on:click={() => {del(i)}}>
          <TrashIcon class="w-4 h-4" />
        </button>
      </div>
    {/each}
  {:else}
    {#each $currentValue as value, i}
      {#if !isTagRenderingBlock}
        <div class="flex justify-between items-center">
          <h3 class="m-0">{singular} {i}</h3>
          <button class="border-black border rounded-full p-1 w-fit h-fit"
                  on:click={() => {del(i)}}>
            <TrashIcon class="w-4 h-4" />
          </button>
        </div>
      {/if}
      <div class="border border-black">
        {#if isTagRenderingBlock}
          <QuestionPreview {state} path={[...path, i]} {schema}>
            <button on:click={() => {del(i)}}>
              <TrashIcon class="w-4 h-4" />
              Delete this question
            </button>

            {#if i > 0}
              <button on:click={() => {moveTo(i, 0)}}>
                Move to front
              </button>

              <button on:click={() => {swap(i, i-1)}}>
                Move up
              </button>
            {/if}
            {#if i + 1 < $currentValue.length}
              <button on:click={() => {swap(i, i+1)}}>
                Move down
              </button>
              <button on:click={() => {moveTo(i, $currentValue.length-1)}}>
                Move to back
              </button>
            {/if}

          </QuestionPreview>
          {:else if schema.hints.types}
         <SchemaBasedMultiType {state} path={fusePath(i, [])} schema={schemaForMultitype()}/>
        {:else}
          {#each subparts as subpart}
            <SchemaBasedInput {state} path={fusePath(i, subpart.path)} schema={subpart} />
          {/each}
        {/if}
      </div>
    {/each}
  {/if}
  <div class="flex">
    <button on:click={() => createItem()}>Add {article} {singular}</button>
    {#if path.length === 1 && path[0] === "tagRenderings"}
      <button on:click={() => {createItem("images");}}>Add a builtin tagRendering</button>
    {/if}
    <slot name="extra-button" />
  </div>
</div>
