#!/usr/bin/env node

import { mkdir, writeFile } from 'node:fs/promises';
import { dirname, resolve } from 'node:path';
import { parseArgs } from 'node:util';
import { AgentOrchestrator } from '../src/backends/index.js';
import type { Attachment } from '../src/channels/types.js';
import type { InboundMessage, OutboundMessage } from '../src/channels/index.js';
import { initAuditLogger, auditLogger } from '../src/audit/index.js';
import type { AuditEventType } from '../src/audit/types.js';
import { createMessageRouter } from '../src/daemon/routing.js';

interface SessionMessage {
  role: 'user' | 'assistant';
  content: unknown;
  timestamp: number;
}

interface SessionLike {
  id: string;
  addMessage(msg: { role: 'user' | 'assistant'; content: unknown }): void;
  getHistory(): SessionMessage[];
  clear(): void;
  replaceHistory(messages: SessionMessage[]): void;
  getConfig(key: string): string | undefined;
  setConfig(key: string, value: string): void;
  deleteConfig(key: string): void;
}

interface ProbeCase {
  id: string;
  text: string;
  attachments?: Attachment[];
}

function usage(): string {
  return [
    'Usage: node --import tsx/esm scripts/run-pi-canary-guard-probes.ts [options]',
    '',
    'Options:',
    '  --out-log <path>    Output JSONL log path',
    '  --session <id>      Session id in <channel>:<sender> format (default: telegram:8367012007)',
  ].join('\n');
}

function parseSessionId(raw: string): { channel: string; senderId: string } {
  const idx = raw.indexOf(':');
  if (idx <= 0 || idx === raw.length - 1) {
    throw new Error(`Invalid --session "${raw}". Expected <channel>:<sender>.`);
  }
  return {
    channel: raw.slice(0, idx),
    senderId: raw.slice(idx + 1),
  };
}

async function main(): Promise<void> {
  const { values } = parseArgs({
    options: {
      'out-log': { type: 'string' },
      session: { type: 'string' },
      help: { type: 'boolean', short: 'h' },
    },
    strict: true,
    allowPositionals: false,
  });

  if (values.help) {
    process.stdout.write(`${usage()}\n`);
    return;
  }

  const sessionId = values.session ?? 'telegram:8367012007';
  const { channel, senderId } = parseSessionId(sessionId);

  const defaultOut = 'docs/plans/artifacts/pi_embedded_eval_window_c_guard_probes.jsonl';
  const outLog = resolve(values['out-log'] ?? defaultOut);

  const events: Array<{
    timestamp: number;
    level: 'debug' | 'info' | 'warn' | 'error';
    event_type: AuditEventType;
    event: Record<string, unknown>;
  }> = [];

  const pushEvent = (
    level: 'debug' | 'info' | 'warn' | 'error',
    eventType: AuditEventType,
    event: Record<string, unknown>,
  ): void => {
    events.push({
      timestamp: Date.now(),
      level,
      event_type: eventType,
      event,
    });
  };

  const sessionConfigs = new Map<string, string>();
  const history: SessionMessage[] = [];
  const session: SessionLike = {
    id: sessionId,
    addMessage(msg) {
      history.push({ ...msg, timestamp: Date.now() });
      pushEvent('debug', 'session.message', {
        session_id: sessionId,
        role: msg.role,
        content_length: typeof msg.content === 'string' ? msg.content.length : JSON.stringify(msg.content).length,
      });
    },
    getHistory() {
      return [...history];
    },
    clear() {
      history.length = 0;
    },
    replaceHistory(messages) {
      history.length = 0;
      history.push(...messages);
    },
    getConfig(key) {
      return sessionConfigs.get(key);
    },
    setConfig(key, value) {
      sessionConfigs.set(key, value);
    },
    deleteConfig(key) {
      sessionConfigs.delete(key);
    },
  };

  const previousAuditLogger = auditLogger;
  const captureLogger = {
    userAction(event: Record<string, unknown>) {
      pushEvent('info', 'user.action', event);
    },
    backendRoute(event: Record<string, unknown>) {
      pushEvent('info', 'backend.route', event);
    },
    backendSuccess(event: Record<string, unknown>) {
      pushEvent('info', 'backend.success', event);
    },
    backendFallback(event: Record<string, unknown>) {
      pushEvent('warn', 'backend.fallback', event);
    },
  };

  const originalProcess = AgentOrchestrator.prototype.process;
  const originalSetModelTier = AgentOrchestrator.prototype.setModelTier;
  const originalGetModelTier = AgentOrchestrator.prototype.getModelTier;
  (AgentOrchestrator.prototype.process as unknown as (messageText: string, attachments?: Attachment[]) => Promise<string>)
    = async function stubbedProcess(messageText: string): Promise<string> {
      return `native stub response: ${messageText.slice(0, 40)}`;
    };
  (AgentOrchestrator.prototype.setModelTier as unknown as (tier: string) => void)
    = function stubbedSetModelTier(): void {};
  (AgentOrchestrator.prototype.getModelTier as unknown as () => string)
    = function stubbedGetModelTier(): string {
      return 'default';
    };

  initAuditLogger(captureLogger as unknown as Parameters<typeof initAuditLogger>[0]);

  try {
    const router = createMessageRouter({
      sessionManager: {
        getSession: () => session,
      } as Parameters<typeof createMessageRouter>[0]['sessionManager'],
      modelRouter: {
        getAvailableTiers: () => ['fast', 'default', 'complex', 'local'],
        getAllLabels: () => ({ fast: 'fast', default: 'default', complex: 'complex', local: 'local' }),
        getLabel: (tier: string) => tier,
      } as Parameters<typeof createMessageRouter>[0]['modelRouter'],
      systemPrompt: 'test prompt',
      toolRegistry: {
        clone() { return this; },
        register() {},
        list() { return []; },
      } as unknown as Parameters<typeof createMessageRouter>[0]['toolRegistry'],
      toolExecutor: {} as Parameters<typeof createMessageRouter>[0]['toolExecutor'],
      config: {
        agents: {
          primary_tier: 'default',
          delegation: {
            compaction: 'fast',
            memory_extraction: 'fast',
            classification: 'fast',
            tool_summarisation: 'fast',
            complex_reasoning: 'complex',
          },
          max_delegation_depth: 2,
          max_iterations: 5,
          auto_escalate: false,
          autonomy_level: 'standard',
          immutable_denylist: [],
        },
        backends: {
          pi_embedded: { no_tools_mode: true },
        },
        compaction: { enabled: false },
        models: { default: { provider: 'anthropic', model: 'claude' } },
      } as Parameters<typeof createMessageRouter>[0]['config'],
      externalBackends: {
        pi_embedded: {
          name: 'pi_embedded',
          process: async () => 'pi embedded probe response',
        },
      },
      defaultName: 'pi_embedded',
    });

    const reply = async (response: OutboundMessage): Promise<void> => {
      if (response.text) {
        pushEvent('debug', 'session.message', {
          session_id: sessionId,
          role: 'assistant',
          content_length: response.text.length,
        });
      }
    };

    const probes: ProbeCase[] = [
      {
        id: 'probe-plain',
        text: 'hello plain canary turn',
      },
      {
        id: 'probe-pi-no-tools',
        text: 'please run a shell command and read a file',
      },
      {
        id: 'probe-capability',
        text: 'what tools are available?',
      },
      {
        id: 'probe-attachments',
        text: 'normal chat with an attachment only',
        attachments: [
          {
            mimeType: 'image/png',
            data: 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR4nGNgYAAAAAMAASsJTYQAAAAASUVORK5CYII=',
            filename: 'pixel.png',
          },
        ],
      },
    ];

    for (const probe of probes) {
      const inbound: InboundMessage = {
        id: probe.id,
        channel,
        senderId,
        text: probe.text,
        timestamp: Date.now(),
        ...(probe.attachments ? { attachments: probe.attachments } : {}),
      };
      await router.handler(inbound, reply);
    }

    await mkdir(dirname(outLog), { recursive: true });
    const jsonl = events.map((event) => JSON.stringify(event)).join('\n');
    await writeFile(outLog, `${jsonl}\n`, 'utf-8');

    process.stdout.write(`Wrote ${events.length} events to ${outLog}\n`);
  } finally {
    initAuditLogger(previousAuditLogger as unknown as Parameters<typeof initAuditLogger>[0]);
    (AgentOrchestrator.prototype.process as unknown as (messageText: string, attachments?: Attachment[]) => Promise<string>)
      = originalProcess as unknown as (messageText: string, attachments?: Attachment[]) => Promise<string>;
    (AgentOrchestrator.prototype.setModelTier as unknown as (tier: string) => void)
      = originalSetModelTier as unknown as (tier: string) => void;
    (AgentOrchestrator.prototype.getModelTier as unknown as () => string)
      = originalGetModelTier as unknown as () => string;
  }
}

main().catch((error) => {
  const message = error instanceof Error ? error.message : String(error);
  process.stderr.write(`${message}\n\n${usage()}\n`);
  process.exitCode = 1;
});