// Metro module 11489 (f11490).
import { useState, useEffect, useCallback } from "react";
import { WHITESPACE_RE } from "../../../Constants";
import { isUnbrokenRun, isWhitespaceSeparatingBoundary } from "./AutocompleteUtils";
const search = {
  kind: "idle"
};
let c7826_6 = {
  search,
  cleanupAnchor: null
};
export default function useMentionAnchor(a0, a1, a2, a3, a4) {
  let r48, r72;
  let c18889_0 = a0;
  const [state, setState] = useState(c7826_6);
  const { cleanupAnchor, search: search2 } = state;
  const r35 = search2.kind !== "idle" ? search2.anchor : null;
  const r36 = a3 ? r35 != null && r35 >= 0 && a0.startsWith(a4, r35) && a1 >= r35 + a4.length && isUnbrokenRun(a0, r35 + a4.length, a1) : a3;
  const anchor2 = r36 ? r35 : null;
  if (a3) {
    const { search: search3, cleanupAnchor: cleanupAnchor2 } = state;
    const kind = search3.kind;
    if (kind === "idle") {
      const r74 = a0.lastIndexOf(a4, a1);
      const anchor3 = r74 !== -1 ? isWhitespaceSeparatingBoundary(a0, r74) ? r74 != null && r74 >= 0 && a0.startsWith(a4, r74) && a1 >= r74 + a4.length && isUnbrokenRun(a0, r74 + a4.length, a1) ? r74 : null : null : null;
      r48 = anchor3 != null ? {
        search: {
          kind: "pending",
          anchor: anchor3,
          seenText: null
        },
        cleanupAnchor: null
      } : {
        search,
        cleanupAnchor: a0.includes(a4) ? cleanupAnchor2 : null
      };
    } else if (kind === "active") {
      const r67 = {
        search: null,
        cleanupAnchor: null
      };
      if (r36) {
        r67.search = search3;
        r72 = r67;
      } else {
        r67.search = search;
        r67.cleanupAnchor = a0.includes(a4) ? search3.anchor : null;
        r72 = r67;
      }
      r48 = r72;
    } else {
      r48 = void 0;
      if (kind === "pending") {
        const { anchor, seenText } = search3;
        r48 = r36 ? {
          search: {
            kind: "active",
            anchor
          },
          cleanupAnchor: cleanupAnchor2
        } : a0.startsWith(a4, anchor) ? {
          search: {
            kind: "pending",
            anchor,
            seenText: null
          },
          cleanupAnchor: cleanupAnchor2
        } : anchor > a0.length ? {
          search,
          cleanupAnchor: cleanupAnchor2
        } : seenText == null ? {
          search: {
            kind: "pending",
            anchor,
            seenText: a0
          },
          cleanupAnchor: cleanupAnchor2
        } : seenText !== a0 ? {
          search,
          cleanupAnchor: cleanupAnchor2
        } : state;
      }
    }
  } else {
    r48 = {
      search,
      cleanupAnchor: null
    };
  }
  let r2 = state.cleanupAnchor === r48.cleanupAnchor;
  if (r2) {
    const search4 = state.search;
    const search5 = r48.search;
    r2 = search4.kind === search5.kind && (search4.kind === "idle" || (search4.kind === "active" ? search5.kind === "active" && search4.anchor === search5.anchor : search5.kind === "pending" && search4.anchor === search5.anchor && search4.seenText === search5.seenText));
  }
  if (!r2) {
    setState(r48);
  }
  useEffect(() => {
    if (cleanupAnchor != null) {
      const location2 = c18889_0.startsWith(a4, cleanupAnchor) ? cleanupAnchor : c18889_0.indexOf(a4);
      if (!(location2 < 0)) {
        let length = c18889_0.slice(location2).search(WHITESPACE_RE);
        if (length === -1) {
          length = c18889_0.length - location2;
        }
        const current = a2.current;
        const applicationCommandManager = a2.current.getApplicationCommandManager();
        let editId = applicationCommandManager == null ? void 0 : applicationCommandManager.props.editId;
        if (editId == null) {
          editId = void 0;
        }
        current.replaceRange({
          location: location2,
          length,
          text: "",
          editId
        });
      }
    }
  }, [cleanupAnchor, a0, a4, a2]);
  return {
    anchor: anchor2,
    beginSearch: useCallback((a0) => {
      if (a3) {
        setState({
          search: {
            kind: "pending",
            anchor: a0,
            seenText: null
          },
          cleanupAnchor: null
        });
      }
    }, [a3])
  };
};