import {
  Fact,
  ReplicacheMutators,
  useEntity,
  useReplicache,
} from "src/replicache";
import { Replicache } from "replicache";
import { useUIState } from "src/useUIState";
import { scanIndex } from "src/replicache/utils";
import { getBlocksWithType } from "src/hooks/queries/useBlocks";
import { focusBlock } from "src/utils/focusBlock";
import { ButtonPrimary } from "components/Buttons";
import { CloseTiny } from "components/Icons/CloseTiny";

export const AreYouSure = (props: {
  entityID: string[] | string;
  onClick?: () => void;
  closeAreYouSure: () => void;
  type: Fact<"block/type">["data"]["value"] | undefined;
  compact?: boolean;
}) => {
  let entities = [props.entityID].flat();
  let { rep } = useReplicache();

  return (
    <div
      className={`
        w-full
        flex items-center justify-center
        ${
          !props.compact &&
          `bg-border-light border-2 border-border rounded-lg
        ${
          props.type === "card"
            ? "h-[104px]"
            : props.type === "mailbox"
              ? "h-[92px]"
              : "h-full"
        }`
        }`}
    >
      <div
        className={`flex h-fit justify-center items-center font-bold text-secondary  ${props.compact ? "flex-row gap-2 justify-between w-full " : "flex-col  py-2 gap-1"}`}
      >
        <div className="text-center w-fit">
          Delete{" "}
          {entities.length > 1 ? (
            "Blocks"
          ) : props.type === "card" ? (
            <span>Page</span>
          ) : props.type === "mailbox" ? (
            <span>Mailbox and Posts</span>
          ) : (
            <span>Block</span>
          )}
          ?{" "}
        </div>
        <div className="flex gap-2">
          <ButtonPrimary
            autoFocus
            compact
            onClick={async (e) => {
              e.stopPropagation();
              if (rep) await deleteBlock(entities, rep);
            }}
          >
            Delete
          </ButtonPrimary>
          <button
            className="text-accent-1"
            onClick={() => props.closeAreYouSure()}
          >
            {props.compact ? (
              <CloseTiny className="mx-2 shrink-0" />
            ) : (
              "Nevermind"
            )}
          </button>
        </div>
      </div>
    </div>
  );
};

export async function deleteBlock(
  entities: string[],
  rep: Replicache<ReplicacheMutators>,
) {
  // get what pagess we need to close as a result of deleting this block
  let pagesToClose = [] as string[];
  for (let entity of entities) {
    let [type] = await rep.query((tx) =>
      scanIndex(tx).eav(entity, "block/type"),
    );
    if (type.data.value === "card") {
      let [childPages] = await rep?.query(
        (tx) => scanIndex(tx).eav(entity, "block/card") || [],
      );
      pagesToClose = [childPages?.data.value];
    }
    if (type.data.value === "mailbox") {
      let [archive] = await rep?.query(
        (tx) => scanIndex(tx).eav(entity, "mailbox/archive") || [],
      );
      let [draft] = await rep?.query(
        (tx) => scanIndex(tx).eav(entity, "mailbox/draft") || [],
      );
      pagesToClose = [archive?.data.value, draft?.data.value];
    }
  }

  //  the next and previous blocks in the block list
  // if the focused thing is a page and not a block, return
  let focusedBlock = useUIState.getState().focusedEntity;
  let parent =
    focusedBlock?.entityType === "page"
      ? focusedBlock.entityID
      : focusedBlock?.parent;

  if (parent) {
    let parentType = await rep?.query((tx) =>
      scanIndex(tx).eav(parent, "page/type"),
    );
    if (parentType[0]?.data.value === "canvas") {
      useUIState
        .getState()
        .setFocusedBlock({ entityType: "page", entityID: parent });
      useUIState.getState().setSelectedBlocks([]);
    } else {
      let siblings =
        (await rep?.query((tx) => getBlocksWithType(tx, parent))) || [];

      let selectedBlocks = useUIState.getState().selectedBlocks;
      let firstSelected = selectedBlocks[0];
      let lastSelected = selectedBlocks[entities.length - 1];

      let prevBlock =
        siblings?.[
          siblings.findIndex((s) => s.value === firstSelected?.value) - 1
        ];
      let prevBlockType = await rep?.query((tx) =>
        scanIndex(tx).eav(prevBlock?.value, "block/type"),
      );

      let nextBlock =
        siblings?.[
          siblings.findIndex((s) => s.value === lastSelected.value) + 1
        ];
      let nextBlockType = await rep?.query((tx) =>
        scanIndex(tx).eav(nextBlock?.value, "block/type"),
      );

      if (prevBlock) {
        useUIState.getState().setSelectedBlock({
          value: prevBlock.value,
          parent: prevBlock.parent,
        });

        focusBlock(
          {
            value: prevBlock.value,
            type: prevBlockType?.[0].data.value,
            parent: prevBlock.parent,
          },
          { type: "end" },
        );
      } else {
        useUIState.getState().setSelectedBlock({
          value: nextBlock.value,
          parent: nextBlock.parent,
        });

        focusBlock(
          {
            value: nextBlock.value,
            type: nextBlockType?.[0]?.data.value,
            parent: nextBlock.parent,
          },
          { type: "start" },
        );
      }
    }
  }

  pagesToClose.forEach((page) => page && useUIState.getState().closePage(page));
  await Promise.all(
    entities.map((entity) =>
      rep?.mutate.removeBlock({
        blockEntity: entity,
      }),
    ),
  );
}