#!/usr/bin/env python3
"""
heaptrm CLI - Scan binaries for heap exploitation patterns.

Usage:
    heaptrm scan ./binary [args...]
    heaptrm scan --stdin payload.bin ./binary
    heaptrm analyze dump.jsonl
    heaptrm watch ./binary          # live monitoring
"""

import argparse
import sys
import os
import json
from pathlib import Path

# Add parent to path for imports
sys.path.insert(0, str(Path(__file__).parent.parent))

from heaptrm.monitor import HeapMonitor


def cmd_scan(args):
    """Scan a binary for heap exploitation."""
    monitor = HeapMonitor(model_path=args.model)

    stdin_data = None
    if args.stdin:
        with open(args.stdin, "rb") as f:
            stdin_data = f.read()

    result = monitor.scan(
        args.binary, args=args.args,
        stdin_data=stdin_data, timeout=args.timeout
    )

    # Output
    if args.json:
        print(json.dumps({
            "verdict": result.verdict,
            "confidence": result.confidence,
            "states": result.n_states,
            "flagged": result.n_flagged,
            "corruptions": [
                {"type": c.type, "step": c.step, "detail": c.detail}
                for c in result.corruptions
            ],
        }, indent=2))
    else:
        icon = {"EXPLOIT": "!!", "SUSPICIOUS": "??", "CLEAN": "OK"}[result.verdict]
        print(f"[{icon}] {result.verdict} (confidence: {result.confidence:.1%})")
        print(f"    States observed: {result.n_states}")
        print(f"    States flagged:  {result.n_flagged}")
        if result.corruptions:
            print(f"    Corruptions detected:")
            for c in result.corruptions:
                print(f"      step {c.step}: {c.type} — {c.detail}")

    return 0 if result.verdict == "CLEAN" else 1


def cmd_analyze(args):
    """Analyze an existing heap dump."""
    monitor = HeapMonitor(model_path=args.model)
    result = monitor.analyze_dump(args.dump)

    icon = {"EXPLOIT": "!!", "SUSPICIOUS": "??", "CLEAN": "OK"}[result.verdict]
    print(f"[{icon}] {result.verdict} (confidence: {result.confidence:.1%})")
    print(f"    States: {result.n_states}, Flagged: {result.n_flagged}")
    if result.corruptions:
        for c in result.corruptions:
            print(f"    step {c.step}: {c.type} — {c.detail}")


def cmd_watch(args):
    """Live-watch a binary."""
    import subprocess
    import tempfile
    import time

    monitor = HeapMonitor(model_path=args.model)
    dump_path = tempfile.mktemp(suffix=".jsonl")

    env = os.environ.copy()
    env["LD_PRELOAD"] = monitor._harness_path
    env["HEAPGRID_OUT"] = dump_path

    cmd = [args.binary] + (args.args or [])
    proc = subprocess.Popen(cmd, env=env)

    print(f"Watching {args.binary} (PID {proc.pid})...")
    last_pos = 0

    try:
        while proc.poll() is None:
            time.sleep(0.1)
            if os.path.exists(dump_path):
                with open(dump_path) as f:
                    f.seek(last_pos)
                    for line in f:
                        if line.strip():
                            state = json.loads(line.strip())
                            corruptions = state.get("corruptions", [])
                            if corruptions:
                                for c in corruptions:
                                    print(f"  [!!] step {state['step']}: "
                                          f"{c['type']} — {c['detail']}")
                    last_pos = f.tell()
    except KeyboardInterrupt:
        proc.terminate()

    # Final analysis
    if os.path.exists(dump_path):
        result = monitor.analyze_dump(dump_path)
        print(f"\nFinal: [{result.verdict}] {result.n_states} states, "
              f"{len(result.corruptions)} corruptions")
        os.unlink(dump_path)


def main():
    parser = argparse.ArgumentParser(
        prog="heaptrm",
        description="Heap exploit detection using Tiny Recursive Models"
    )
    parser.add_argument("--model", help="Path to trained .pt model")

    sub = parser.add_subparsers(dest="command")

    # scan
    p_scan = sub.add_parser("scan", help="Scan a binary")
    p_scan.add_argument("binary")
    p_scan.add_argument("args", nargs="*")
    p_scan.add_argument("--stdin", help="File to pipe to stdin")
    p_scan.add_argument("--timeout", type=int, default=30)
    p_scan.add_argument("--json", action="store_true")

    # analyze
    p_analyze = sub.add_parser("analyze", help="Analyze a heap dump")
    p_analyze.add_argument("dump")

    # watch
    p_watch = sub.add_parser("watch", help="Live-watch a binary")
    p_watch.add_argument("binary")
    p_watch.add_argument("args", nargs="*")

    args = parser.parse_args()

    if args.command == "scan":
        sys.exit(cmd_scan(args))
    elif args.command == "analyze":
        cmd_analyze(args)
    elif args.command == "watch":
        cmd_watch(args)
    else:
        parser.print_help()


if __name__ == "__main__":
    main()