'use client';
import * as React from 'react';
import { TABSTER_ATTRIBUTE_NAME } from 'tabster';
/**
 * Merges a collection of tabster attributes.
 *
 * ⚠️The attributes passed as arguments to this  hook cannot change at runtime.
 * @internal
 * @param attributes - collection of tabster attributes from other react-tabster hooks
 * @returns single merged tabster attribute
 */ export const useMergedTabsterAttributes_unstable = (...attributes)=>{
    'use no memo';
    const stringAttributes = attributes.reduce((acc, curr)=>{
        if (curr === null || curr === void 0 ? void 0 : curr[TABSTER_ATTRIBUTE_NAME]) {
            acc.push(curr[TABSTER_ATTRIBUTE_NAME]);
        }
        return acc;
    }, []);
    if (process.env.NODE_ENV !== 'production') {
        // ignoring rules of hooks because this is a condition based on the environment
        // it's safe to ignore the rule
        // eslint-disable-next-line react-hooks/rules-of-hooks
        useWarnIfUnstableAttributes(stringAttributes);
    }
    return React.useMemo(()=>({
            [TABSTER_ATTRIBUTE_NAME]: stringAttributes.length > 0 ? stringAttributes.reduce(mergeJSONStrings) : undefined
        }), // disable exhaustive-deps because we want to memoize the result of the reduction
    // this is safe because the collection of attributes is not expected to change at runtime
    // eslint-disable-next-line react-hooks/exhaustive-deps
    stringAttributes);
};
/**
 * Merges two JSON strings into one.
 */ const mergeJSONStrings = (a, b)=>JSON.stringify(Object.assign(safelyParseJSON(a), safelyParseJSON(b)));
/**
 * Tries to parse a JSON string and returns an object.
 * If the JSON string is invalid, an empty object is returned.
 */ const safelyParseJSON = (json)=>{
    try {
        return JSON.parse(json);
    } catch  {
        return {};
    }
};
/**
 * Helper hook that ensures that the attributes passed to the hook are stable.
 * This is necessary because the attributes are expected to not change at runtime.
 *
 * This hook will console.warn if the attributes change at runtime.
 */ const useWarnIfUnstableAttributes = (attributes)=>{
    'use no memo';
    const initialAttributesRef = React.useRef(attributes);
    let isStable = initialAttributesRef.current.length === attributes.length;
    if (initialAttributesRef.current !== attributes && isStable) {
        for(let i = 0; i < attributes.length; i++){
            if (initialAttributesRef.current[i] !== attributes[i]) {
                isStable = false;
                break;
            }
        }
    }
    React.useEffect(()=>{
        if (!isStable) {
            const error = new Error();
            // eslint-disable-next-line no-console
            console.warn(/** #__DE-INDENT__ */ `
        @fluentui/react-tabster [useMergedTabsterAttributes]:
        The attributes passed to the hook changed at runtime.
        This might lead to unexpected behavior, please ensure that the attributes are stable.
        ${error.stack}
      `);
        }
    }, [
        isStable
    ]);
};