/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import type { AnyDeclarativeTool, AnyToolInvocation } from '../index.js';
import { isTool } from '../index.js';

const SHELL_TOOL_NAMES = ['run_shell_command', 'ShellTool'];

/**
 * Checks if a tool invocation matches any of a list of patterns.
 *
 * @param toolOrToolName The tool object or the name of the tool being invoked.
 * @param invocation The invocation object for the tool.
 * @param patterns A list of patterns to match against.
 *   Patterns can be:
 *   - A tool name (e.g., "ReadFileTool") to match any invocation of that tool.
 *   - A tool name with a prefix (e.g., "ShellTool(git status)") to match
 *     invocations where the arguments start with that prefix.
 * @returns True if the invocation matches any pattern, false otherwise.
 */
export function doesToolInvocationMatch(
  toolOrToolName: AnyDeclarativeTool | string,
  invocation: AnyToolInvocation,
  patterns: string[],
): boolean {
  let toolNames: string[];
  if (isTool(toolOrToolName)) {
    toolNames = [toolOrToolName.name, toolOrToolName.constructor.name];
  } else {
    toolNames = [toolOrToolName as string];
  }

  if (toolNames.some((name) => SHELL_TOOL_NAMES.includes(name))) {
    toolNames = [...new Set([...toolNames, ...SHELL_TOOL_NAMES])];
  }

  for (const pattern of patterns) {
    const openParen = pattern.indexOf('(');

    if (openParen === -1) {
      // No arguments, just a tool name
      if (toolNames.includes(pattern)) {
        return true;
      }
      continue;
    }

    const patternToolName = pattern.substring(0, openParen);
    if (!toolNames.includes(patternToolName)) {
      continue;
    }

    if (!pattern.endsWith(')')) {
      continue;
    }

    const argPattern = pattern.substring(openParen + 1, pattern.length - 1);

    if (
      'command' in invocation.params &&
      toolNames.includes('run_shell_command')
    ) {
      const argValue = String(
        (invocation.params as { command: string }).command,
      );
      if (argValue === argPattern || argValue.startsWith(argPattern + ' ')) {
        return true;
      }
    }
  }

  return false;
}