/**
 * Browser MCP Tools
 *
 * CLI integration for @claude-flow/browser package.
 * Provides browser automation tools for web navigation, interaction, and data extraction.
 */

import { readFileSync, existsSync } from 'node:fs';
import type { MCPTool, MCPToolResult } from './types.js';
import { validateIdentifier, validateText } from './validate-input.js';

// Session registry for multi-session support
const browserSessions = new Map<string, {
  sessionId: string;
  createdAt: string;
  lastActivity: string;
}>();

/**
 * Execute agent-browser CLI command.
 * Tries global agent-browser first, falls back to npx if ENOENT.
 */
async function execBrowserCommand(args: string[], session = 'default'): Promise<MCPToolResult> {
  const { execFileSync } = await import('child_process');
  const fullArgs = ['--session', session, '--json', ...args];

  let result: string;
  try {
    result = execFileSync('agent-browser', fullArgs, {
      encoding: 'utf-8',
      timeout: 30000,
    });
  } catch (error) {
    const err = error as NodeJS.ErrnoException;
    if (err.code === 'ENOENT') {
      try {
        result = execFileSync('npx', ['--yes', 'agent-browser', ...fullArgs], {
          encoding: 'utf-8',
          timeout: 60000,
        });
      } catch (npxError) {
        const npxErr = npxError as NodeJS.ErrnoException;
        return {
          content: [{
            type: 'text',
            text: JSON.stringify({
              success: false,
              error: npxErr.code === 'ENOENT'
                ? 'Neither agent-browser nor npx found. Install with: npm i -g agent-browser'
                : npxErr instanceof Error ? npxErr.message : String(npxError),
            }),
          }],
          isError: true,
        };
      }
    } else {
      return {
        content: [{
          type: 'text',
          text: JSON.stringify({
            success: false,
            error: err instanceof Error ? err.message : String(error),
          }),
        }],
        isError: true,
      };
    }
  }

  let data;
  try {
    data = JSON.parse(result);
  } catch {
    data = result.trim();
  }

  const sessionInfo = browserSessions.get(session);
  if (sessionInfo) {
    sessionInfo.lastActivity = new Date().toISOString();
  }

  return {
    content: [{
      type: 'text',
      text: JSON.stringify(data, null, 2),
    }],
  };
}

/**
 * Read a sysctl value, returning the trimmed string or null.
 */
function readSysctl(name: string): string | null {
  try {
    const p = `/proc/sys/kernel/${name}`;
    if (existsSync(p)) return readFileSync(p, 'utf-8').trim();
  } catch { /* not Linux or can't read */ }
  return null;
}

/**
 * Detect if Linux needs --no-sandbox for Chrome.
 * Checks both legacy userns flag and Ubuntu 24.04+ AppArmor restriction.
 */
function needsNoSandbox(): boolean {
  if (process.platform !== 'linux') return false;
  return readSysctl('unprivileged_userns_clone') === '0' ||
    readSysctl('apparmor_restrict_unprivileged_userns') === '1';
}

/**
 * Browser MCP Tools
 */
export const browserTools: MCPTool[] = [
  // ==========================================================================
  // Navigation Tools
  // ==========================================================================
  {
    name: 'browser_open',
    description: 'Navigate browser to a URL Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['navigation', 'web'],
    inputSchema: {
      type: 'object',
      properties: {
        url: { type: 'string', description: 'URL to navigate to' },
        session: { type: 'string', description: 'Session ID (default: "default")' },
        waitUntil: {
          type: 'string',
          enum: ['load', 'domcontentloaded', 'networkidle'],
          description: 'Wait condition',
        },
        args: {
          type: 'array',
          items: { type: 'string' },
          description: 'Additional Chrome launch args (e.g., ["--no-sandbox", "--disable-dev-shm-usage"])',
        },
      },
      required: ['url'],
    },
    handler: async (input) => {
      const vUrl = validateText(input.url, 'url');
      if (!vUrl.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vUrl.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { url, session, waitUntil } = input as {
        url: string;
        session?: string;
        waitUntil?: string;
      };
      const launchArgs = (input.args as string[] | undefined) || [];
      if (needsNoSandbox() && !launchArgs.includes('--no-sandbox')) {
        launchArgs.push('--no-sandbox');
      }
      const args = ['open', url];
      if (waitUntil) args.push('--wait-until', waitUntil);
      if (launchArgs.length > 0) args.push('--args', launchArgs.join(','));

      // Create session if new
      const sessionId = session || 'default';
      if (!browserSessions.has(sessionId)) {
        browserSessions.set(sessionId, {
          sessionId,
          createdAt: new Date().toISOString(),
          lastActivity: new Date().toISOString(),
        });
      }

      return execBrowserCommand(args, sessionId);
    },
  },
  {
    name: 'browser_back',
    description: 'Navigate back in browser history Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['navigation'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      return execBrowserCommand(['back'], session);
    },
  },
  {
    name: 'browser_forward',
    description: 'Navigate forward in browser history Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['navigation'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      return execBrowserCommand(['forward'], session);
    },
  },
  {
    name: 'browser_reload',
    description: 'Reload the current page Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['navigation'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      return execBrowserCommand(['reload'], session);
    },
  },
  {
    name: 'browser_close',
    description: 'Close the browser session Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['navigation'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      const sessionId = session || 'default';
      browserSessions.delete(sessionId);
      return execBrowserCommand(['close'], sessionId);
    },
  },

  // ==========================================================================
  // Snapshot Tools (AI-Optimized)
  // ==========================================================================
  {
    name: 'browser_snapshot',
    description: 'Get AI-optimized accessibility tree snapshot with element refs (@e1, @e2, etc.) Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['snapshot', 'ai'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
        interactive: { type: 'boolean', description: 'Only interactive elements (-i flag)' },
        compact: { type: 'boolean', description: 'Remove empty structural elements (-c flag)' },
        depth: { type: 'number', description: 'Limit tree depth (-d flag)' },
        selector: { type: 'string', description: 'Scope to CSS selector (-s flag)' },
      },
    },
    handler: async (input) => {
      if (input.selector) { const vSel = validateText(input.selector, 'selector'); if (!vSel.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vSel.error }) }], isError: true }; }
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { session, interactive, compact, depth, selector } = input as {
        session?: string;
        interactive?: boolean;
        compact?: boolean;
        depth?: number;
        selector?: string;
      };
      const args = ['snapshot'];
      if (interactive) args.push('-i');
      if (compact) args.push('-c');
      if (depth) args.push('-d', String(depth));
      if (selector) args.push('-s', selector);
      return execBrowserCommand(args, session);
    },
  },
  {
    name: 'browser_screenshot',
    description: 'Capture screenshot of the page Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['snapshot', 'screenshot'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
        path: { type: 'string', description: 'Save path (returns base64 if not specified)' },
        fullPage: { type: 'boolean', description: 'Capture full page' },
      },
    },
    handler: async (input) => {
      if (input.path) { const vP = validateText(input.path, 'path'); if (!vP.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vP.error }) }], isError: true }; }
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { session, path, fullPage } = input as {
        session?: string;
        path?: string;
        fullPage?: boolean;
      };
      const args = ['screenshot'];
      if (path) args.push(path);
      if (fullPage) args.push('--full');
      return execBrowserCommand(args, session);
    },
  },

  // ==========================================================================
  // Interaction Tools
  // ==========================================================================
  {
    name: 'browser_click',
    description: 'Click an element using ref (@e1) or CSS selector Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Element ref (@e1) or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
        button: { type: 'string', enum: ['left', 'right', 'middle'], description: 'Mouse button' },
        count: { type: 'number', description: 'Click count (2 for double-click)' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session, button, count } = input as {
        target: string;
        session?: string;
        button?: string;
        count?: number;
      };
      const args = ['click', target];
      if (button) args.push('--button', button);
      if (count) args.push('--count', String(count));
      return execBrowserCommand(args, session);
    },
  },
  {
    name: 'browser_fill',
    description: 'Clear and fill an input element Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Element ref (@e1) or CSS selector' },
        value: { type: 'string', description: 'Value to fill' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target', 'value'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      const vValue = validateText(input.value, 'value');
      if (!vValue.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vValue.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, value, session } = input as {
        target: string;
        value: string;
        session?: string;
      };
      return execBrowserCommand(['fill', target, value], session);
    },
  },
  {
    name: 'browser_type',
    description: 'Type text with key events (for autocomplete, etc.) Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Element ref or CSS selector' },
        text: { type: 'string', description: 'Text to type' },
        session: { type: 'string', description: 'Session ID' },
        delay: { type: 'number', description: 'Delay between keystrokes (ms)' },
      },
      required: ['target', 'text'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      const vText = validateText(input.text, 'text');
      if (!vText.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vText.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, text, session, delay } = input as {
        target: string;
        text: string;
        session?: string;
        delay?: number;
      };
      const args = ['type', target, text];
      if (delay) args.push('--delay', String(delay));
      return execBrowserCommand(args, session);
    },
  },
  {
    name: 'browser_press',
    description: 'Press a keyboard key Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction'],
    inputSchema: {
      type: 'object',
      properties: {
        key: { type: 'string', description: 'Key to press (Enter, Tab, Escape, etc.)' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['key'],
    },
    handler: async (input) => {
      const vKey = validateText(input.key, 'key');
      if (!vKey.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vKey.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { key, session } = input as { key: string; session?: string };
      return execBrowserCommand(['press', key], session);
    },
  },
  {
    name: 'browser_hover',
    description: 'Hover over an element using ref (@e1) or CSS selector Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Element ref (@e1) or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session } = input as { target: string; session?: string };
      return execBrowserCommand(['hover', target], session);
    },
  },
  {
    name: 'browser_select',
    description: 'Select an option from a dropdown Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Select element ref or CSS selector' },
        value: { type: 'string', description: 'Option value to select' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target', 'value'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      const vValue = validateText(input.value, 'value');
      if (!vValue.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vValue.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, value, session } = input as {
        target: string;
        value: string;
        session?: string;
      };
      return execBrowserCommand(['select', target, value], session);
    },
  },
  {
    name: 'browser_check',
    description: 'Check a checkbox Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Checkbox ref or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session } = input as { target: string; session?: string };
      return execBrowserCommand(['check', target], session);
    },
  },
  {
    name: 'browser_uncheck',
    description: 'Uncheck a checkbox Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Checkbox ref or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session } = input as { target: string; session?: string };
      return execBrowserCommand(['uncheck', target], session);
    },
  },
  {
    name: 'browser_scroll',
    description: 'Scroll the page Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['interaction'],
    inputSchema: {
      type: 'object',
      properties: {
        direction: { type: 'string', enum: ['up', 'down', 'left', 'right'], description: 'Scroll direction' },
        amount: { type: 'number', description: 'Scroll amount in pixels' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['direction'],
    },
    handler: async (input) => {
      const { direction, amount, session } = input as {
        direction: string;
        amount?: number;
        session?: string;
      };
      const args = ['scroll', direction];
      if (amount) args.push(String(amount));
      return execBrowserCommand(args, session);
    },
  },

  // ==========================================================================
  // Information Retrieval Tools
  // ==========================================================================
  {
    name: 'browser_get-text',
    description: 'Get text content of an element Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['info'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Element ref or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session } = input as { target: string; session?: string };
      return execBrowserCommand(['get', 'text', target], session);
    },
  },
  {
    name: 'browser_get-value',
    description: 'Get value of an input element Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['info', 'form'],
    inputSchema: {
      type: 'object',
      properties: {
        target: { type: 'string', description: 'Input element ref or CSS selector' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['target'],
    },
    handler: async (input) => {
      const vTarget = validateText(input.target, 'target');
      if (!vTarget.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vTarget.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { target, session } = input as { target: string; session?: string };
      return execBrowserCommand(['get', 'value', target], session);
    },
  },
  {
    name: 'browser_get-title',
    description: 'Get the page title Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['info'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      return execBrowserCommand(['get', 'title'], session);
    },
  },
  {
    name: 'browser_get-url',
    description: 'Get the current URL Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['info'],
    inputSchema: {
      type: 'object',
      properties: {
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      const { session } = input as { session?: string };
      return execBrowserCommand(['get', 'url'], session);
    },
  },

  // ==========================================================================
  // Wait Tools
  // ==========================================================================
  {
    name: 'browser_wait',
    description: 'Wait for a condition Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['wait'],
    inputSchema: {
      type: 'object',
      properties: {
        selector: { type: 'string', description: 'CSS selector to wait for' },
        text: { type: 'string', description: 'Text to wait for' },
        url: { type: 'string', description: 'URL pattern to wait for' },
        timeout: { type: 'number', description: 'Wait timeout in ms' },
        session: { type: 'string', description: 'Session ID' },
      },
    },
    handler: async (input) => {
      if (input.selector) { const vSel = validateText(input.selector, 'selector'); if (!vSel.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vSel.error }) }], isError: true }; }
      if (input.text) { const vT = validateText(input.text, 'text'); if (!vT.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vT.error }) }], isError: true }; }
      if (input.url) { const vU = validateText(input.url, 'url'); if (!vU.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vU.error }) }], isError: true }; }
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { selector, text, url, timeout, session } = input as {
        selector?: string;
        text?: string;
        url?: string;
        timeout?: number;
        session?: string;
      };
      const args = ['wait'];
      if (selector) args.push(selector);
      if (text) args.push('--text', text);
      if (url) args.push('--url', url);
      if (timeout) args.push(String(timeout));
      return execBrowserCommand(args, session);
    },
  },

  // ==========================================================================
  // JavaScript Execution
  // ==========================================================================
  {
    name: 'browser_eval',
    description: 'Execute JavaScript in page context Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['eval', 'js'],
    inputSchema: {
      type: 'object',
      properties: {
        script: { type: 'string', description: 'JavaScript code to execute' },
        session: { type: 'string', description: 'Session ID' },
      },
      required: ['script'],
    },
    handler: async (input) => {
      const vScript = validateText(input.script, 'script');
      if (!vScript.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vScript.error }) }], isError: true };
      if (input.session) { const vS = validateIdentifier(input.session, 'session'); if (!vS.valid) return { content: [{ type: 'text', text: JSON.stringify({ success: false, error: vS.error }) }], isError: true }; }
      const { script, session } = input as { script: string; session?: string };
      return execBrowserCommand(['eval', script], session);
    },
  },

  // ==========================================================================
  // Session Management
  // ==========================================================================
  {
    name: 'browser_session-list',
    description: 'List active browser sessions Use when native WebFetch is wrong because you need real browser automation — JS-heavy SPA scraping, login flows with cookie reuse, replay against DOM-drifted versions, AIDefence PII gating before content reaches Claude. For static HTML pages, native WebFetch is faster and free.',
    category: 'browser',
    tags: ['session'],
    inputSchema: {
      type: 'object',
      properties: {},
    },
    handler: async () => {
      const sessions = Array.from(browserSessions.values());
      return {
        content: [{
          type: 'text',
          text: JSON.stringify({
            success: true,
            sessions,
            count: sessions.length,
          }, null, 2),
        }],
      };
    },
  },
];

export default browserTools;