#!/usr/bin/env python3
"""Build a 100%-Shodan-covered, 100%-vendor-labeled validation set."""

from __future__ import annotations

import argparse
import asyncio
import csv
import json
import math
import sys
import time
from collections import Counter, defaultdict
from pathlib import Path
from typing import Any

import httpx

import pipeline as p


def pool_rows() -> dict[str, list[dict[str, Any]]]:
    return {
        device_type: p.read_jsonl(
            p.DATA / "censys_raw" / f"{device_type}.jsonl.gz"
        )
        for device_type in p.device_types()
    }


def snapshot_pool() -> None:
    p.ensure_dirs()
    rows_by_type = pool_rows()
    manifest = []
    for device_type, rows in rows_by_type.items():
        features = []
        for rank, row in enumerate(rows, start=1):
            resource = row.get("resource") or {}
            ip = p.clean(resource.get("ip"))
            features.append(p.extract_features(resource))
            manifest.append(
                {
                    "sample_id": f"{device_type}:{ip}",
                    "device_type": device_type,
                    "ip": ip,
                    "query_rank": rank,
                    "collected_at": row.get("collected_at") or "",
                }
            )
        p.atomic_csv(
            p.DATA / f"candidate_ipraw_{device_type}.csv",
            features,
            p.CSV_FIELDS,
        )
    p.atomic_csv(
        p.DATA / "candidate_manifest.csv",
        manifest,
        ["sample_id", "device_type", "ip", "query_rank", "collected_at"],
    )
    p.atomic_json(
        p.DATA / "candidate_pool_metadata.json",
        {
            "updated_at": p.utc_now(),
            "counts": {
                device_type: len(rows)
                for device_type, rows in rows_by_type.items()
            },
            "unique_ips": len({row["ip"] for row in manifest}),
            "initial_pool_per_type": 200,
        },
    )
    print(
        "[pool] "
        + ", ".join(
            f"{device_type}={len(rows)}"
            for device_type, rows in rows_by_type.items()
        )
    )


def search_with_retry(sdk: Any, body: dict[str, Any]) -> dict[str, Any]:
    for attempt in range(6):
        try:
            return sdk.global_data.search(
                search_query_input_body=body,
                timeout_ms=120000,
            ).model_dump()
        except Exception:
            if attempt == 5:
                raise
            time.sleep(min(30, 2 ** (attempt + 1)))
    raise RuntimeError("unreachable")


def hydrate_with_retry(sdk: Any, ips: list[str]) -> list[dict[str, Any]]:
    for attempt in range(6):
        try:
            response = sdk.global_data.get_hosts(
                asset_host_list_input_body={"host_ids": ips},
                timeout_ms=120000,
            ).model_dump()
            return response.get("result", {}).get("result", [])
        except Exception:
            if attempt == 5:
                raise
            time.sleep(min(30, 2 ** (attempt + 1)))
    return []


def expand_pool(target: int, selected_types: list[str] | None) -> None:
    from censys_platform import SDK

    p.ensure_dirs()
    types = selected_types or p.device_types()
    unknown = set(types) - set(p.device_types())
    if unknown:
        raise ValueError(f"unknown device types: {sorted(unknown)}")
    config = json.loads(p.SEARCH_CONFIG.read_text())["censys"]["platform"]
    sdk = SDK(
        organization_id=config["org_id"],
        personal_access_token=config["personal_access_token"],
    )
    rows_by_type = pool_rows()
    globally_seen = {
        p.clean((row.get("resource") or {}).get("ip"))
        for rows in rows_by_type.values()
        for row in rows
        if p.clean((row.get("resource") or {}).get("ip"))
    }

    for device_type in types:
        rows = rows_by_type[device_type]
        own_ips = {
            p.clean((row.get("resource") or {}).get("ip")) for row in rows
        }
        globally_seen.difference_update(own_ips)
        query = p.censys_query(device_type)
        token = ""
        pages = 0
        exhausted = False
        while len(rows) < target and not exhausted:
            body: dict[str, Any] = {
                "fields": ["host.ip"],
                "page_size": 100,
                "query": query,
            }
            if token:
                body["page_token"] = token
            response = search_with_retry(sdk, body)
            result = response.get("result", {}).get("result", {})
            pages += 1
            candidates = []
            for hit in result.get("hits") or []:
                ip = p.clean(p.host_resource(hit).get("ip"))
                if not ip or ip in globally_seen or ip in own_ips:
                    continue
                candidates.append(ip)
                if len(candidates) >= min(100, target - len(rows)):
                    break
            hydrated = hydrate_with_retry(sdk, candidates) if candidates else []
            resources = {
                p.clean((item.get("resource") or {}).get("ip")): (
                    item.get("resource") or {}
                )
                for item in hydrated
            }
            for ip in candidates:
                resource = resources.get(ip)
                if not resource:
                    continue
                rows.append(
                    {
                        "device_type": device_type,
                        "query": query,
                        "query_rank": len(rows) + 1,
                        "collected_at": p.utc_now(),
                        "resource": resource,
                    }
                )
                own_ips.add(ip)
                globally_seen.add(ip)
            p.atomic_jsonl_gz(
                p.DATA / "censys_raw" / f"{device_type}.jsonl.gz",
                rows,
            )
            print(
                f"[expand] {device_type}: {len(rows)}/{target} "
                f"after page {pages}",
                flush=True,
            )
            token = p.clean(result.get("next_page_token"))
            exhausted = not token
            if pages >= 100:
                raise RuntimeError(f"{device_type}: page safety limit reached")
        globally_seen.update(own_ips)
        if len(rows) < target:
            print(
                f"[expand] {device_type}: exhausted at {len(rows)} records",
                flush=True,
            )
    snapshot_pool()


async def collect_candidate_shodan() -> None:
    p.ensure_dirs()
    manifest = p.read_csv(p.DATA / "candidate_manifest.csv")
    path = p.DATA / "shodan_hosts.jsonl.gz"
    cache = {row["ip"]: row for row in p.read_jsonl(path)}
    pending = [
        row["ip"]
        for row in manifest
        if row["ip"] not in cache or cache[row["ip"]].get("status") == "error"
    ]
    api_key = json.loads(p.SEARCH_CONFIG.read_text())["shodan"]["api_key"]
    rate_lock = asyncio.Lock()
    next_request_at = 0.0
    semaphore = asyncio.Semaphore(32)

    async with httpx.AsyncClient(
        timeout=httpx.Timeout(12, connect=8)
    ) as client:
        async def request(ip: str, minified: bool) -> httpx.Response:
            nonlocal next_request_at
            async with rate_lock:
                loop = asyncio.get_running_loop()
                delay = next_request_at - loop.time()
                if delay > 0:
                    await asyncio.sleep(delay)
                next_request_at = loop.time() + 1.05
            return await asyncio.wait_for(
                client.get(
                    p.SHODAN_HOST_URL.format(ip=ip),
                    params={
                        "key": api_key,
                        "minify": str(minified).lower(),
                    },
                ),
                timeout=10 if minified else 15,
            )

        async def fetch(ip: str) -> dict[str, Any]:
            async with semaphore:
                for attempt in range(2):
                    minified = attempt == 1
                    try:
                        response = await request(ip, minified)
                    except (httpx.RequestError, asyncio.TimeoutError) as exc:
                        if attempt == 0:
                            continue
                        return {
                            "ip": ip,
                            "status": "error",
                            "error": f"{type(exc).__name__}: {exc}",
                            "collected_at": p.utc_now(),
                        }
                    if response.status_code == 200:
                        return {
                            "ip": ip,
                            "status": "ok",
                            "collected_at": p.utc_now(),
                            "resource": p.compact_shodan(
                                response.json(),
                                minified,
                            ),
                        }
                    if response.status_code == 404:
                        return {
                            "ip": ip,
                            "status": "not_found",
                            "collected_at": p.utc_now(),
                        }
                    if response.status_code == 429:
                        await asyncio.sleep(3)
                        continue
                    if response.status_code >= 500 and attempt == 0:
                        continue
                    return {
                        "ip": ip,
                        "status": "error",
                        "error": (
                            f"HTTP {response.status_code}: "
                            f"{response.text[:300]}"
                        ),
                        "collected_at": p.utc_now(),
                    }
            return {"ip": ip, "status": "error", "error": "retry exhausted"}

        for offset in range(0, len(pending), 50):
            chunk = pending[offset : offset + 50]
            rows = await asyncio.gather(*(fetch(ip) for ip in chunk))
            for row in rows:
                cache[row["ip"]] = row
            ordered = [
                cache[row["ip"]]
                for row in manifest
                if row["ip"] in cache
            ]
            p.atomic_jsonl_gz(path, ordered)
            print(
                f"[shodan-pool] {offset + len(chunk)}/{len(pending)}; "
                f"cached={len(cache)}",
                flush=True,
            )


def candidate_labels() -> dict[str, dict[str, str]]:
    result = {}
    for device_type in p.device_types():
        path = p.LABEL / f"candidate_label_{device_type}.csv"
        result[device_type] = (
            {row["ip"]: row["vendor"] for row in p.read_csv(path)}
            if path.exists()
            else {}
        )
    return result


def prepare_label_round(round_name: str, batch_size: int) -> None:
    p.ensure_dirs()
    manifest = p.read_csv(p.DATA / "candidate_manifest.csv")
    shodan = {
        row["ip"]: row
        for row in p.read_jsonl(p.DATA / "shodan_hosts.jsonl.gz")
    }
    existing = candidate_labels()
    fingerprints = {
        device_type: {
            row["ip"]: row
            for row in p.read_csv(
                p.DATA / f"candidate_ipraw_{device_type}.csv"
            )
        }
        for device_type in p.device_types()
    }
    eligible_unlabeled: dict[str, list[str]] = defaultdict(list)
    for row in manifest:
        device_type = row["device_type"]
        ip = row["ip"]
        if (shodan.get(ip) or {}).get("status") != "ok":
            continue
        if ip in existing[device_type]:
            continue
        eligible_unlabeled[device_type].append(ip)

    batches = {}
    items = []
    for device_type in p.device_types():
        ips = eligible_unlabeled[device_type]
        for offset in range(0, len(ips), batch_size):
            batch_ips = ips[offset : offset + batch_size]
            item_id = f"{round_name}:{device_type}:{offset // batch_size:04d}"
            sections = []
            for ip in batch_ips:
                row = fingerprints[device_type][ip]
                evidence = [
                    f"{field}: {p.truncate(row.get(field))}"
                    for field in p.DISPLAY_FEATURES
                    if p.truncate(row.get(field))
                ]
                sections.append(f"[IP: {ip}]\n" + "\n".join(evidence))
            content = (
                f"Device type: {device_type}\n\n"
                + "\n\n".join(sections)
            )
            items.append({"id": item_id, "content": content})
            batches[item_id] = {
                "device_type": device_type,
                "ips": batch_ips,
                "content": content,
            }

    p.LABEL.mkdir(parents=True, exist_ok=True)
    input_path = p.LABEL / f"{round_name}_input.jsonl"
    with input_path.open("w", encoding="utf-8") as handle:
        for item in items:
            handle.write(json.dumps(item, ensure_ascii=False) + "\n")
    p.atomic_json(p.LABEL / f"{round_name}_manifest.json", batches)
    prompt = """You are an expert in IoT and network-device vendor identification.

For every IP in the user message, identify the physical IoT device
manufacturer using the supplied device type and fingerprint evidence.

Prioritize direct hardware/software vendor fields, certificate identities,
HTTP titles/bodies/tags/favicons, operating-system evidence, and reverse DNS.
WHOIS and ASN are weak evidence and must not be treated as the device vendor
without supporting device evidence.

Return exactly one JSON object mapping every supplied IP to one canonical
manufacturer name. Use Unknown when direct evidence is insufficient. Do not
guess from country, ISP, open port, or device type. Output JSON only."""
    (p.LABEL / "vendor_system_prompt.md").write_text(prompt, encoding="utf-8")
    print(
        f"[label-round] {round_name}: {len(items)} batches, "
        f"{sum(len(value['ips']) for value in batches.values())} IPs"
    )


def run_label_round(round_name: str, workers: int, model: str) -> None:
    p.run_llm(
        p.LABEL / f"{round_name}_input.jsonl",
        p.LABEL / f"{round_name}_output.jsonl",
        workers,
        model,
    )


def parse_label_round(round_name: str) -> None:
    batches = json.loads(
        (p.LABEL / f"{round_name}_manifest.json").read_text()
    )
    output = p.read_jsonl(p.LABEL / f"{round_name}_output.jsonl")
    parsed = {}
    errors = {}
    for row in output:
        item_id = p.clean(row.get("id"))
        if row.get("error"):
            errors[item_id] = row.get("error")
            continue
        mapping = p.normalize_llm_mapping(row.get("parsed"))
        if not mapping and isinstance(row.get("response"), str):
            try:
                mapping = p.normalize_llm_mapping(json.loads(row["response"]))
            except json.JSONDecodeError:
                mapping = {}
        parsed[item_id] = mapping

    labels = candidate_labels()
    missing = []
    for item_id, batch in batches.items():
        mapping = parsed.get(item_id, {})
        for ip in batch["ips"]:
            vendor = p.canonical_vendor(p.clean(mapping.get(ip)))
            if not vendor:
                missing.append({"batch": item_id, "ip": ip})
                continue
            labels[batch["device_type"]][ip] = vendor

    for device_type in p.device_types():
        rows = [
            {"ip": ip, "vendor": vendor}
            for ip, vendor in labels[device_type].items()
        ]
        p.atomic_csv(
            p.LABEL / f"candidate_label_{device_type}.csv",
            rows,
            ["ip", "vendor"],
        )
    p.atomic_json(
        p.LABEL / f"{round_name}_summary.json",
        {
            "label_source": "IoTProber",
            "batches": len(batches),
            "parsed_batches": len(parsed),
            "errors": errors,
            "missing": missing,
            "candidate_label_counts": {
                device_type: len(rows)
                for device_type, rows in labels.items()
            },
        },
    )
    print(
        f"[label-round] parsed={len(parsed)}/{len(batches)}, "
        f"missing={len(missing)}, errors={len(errors)}"
    )


def eligibility() -> dict[str, dict[str, int]]:
    manifest = p.read_csv(p.DATA / "candidate_manifest.csv")
    shodan = {
        row["ip"]: row
        for row in p.read_jsonl(p.DATA / "shodan_hosts.jsonl.gz")
    }
    labels = candidate_labels()
    stats = {
        device_type: {
            "candidates": 0,
            "shodan_ok": 0,
            "labeled": 0,
            "eligible": 0,
        }
        for device_type in p.device_types()
    }
    for row in manifest:
        device_type = row["device_type"]
        ip = row["ip"]
        stats[device_type]["candidates"] += 1
        if (shodan.get(ip) or {}).get("status") == "ok":
            stats[device_type]["shodan_ok"] += 1
            vendor = labels[device_type].get(ip, "")
            if vendor:
                stats[device_type]["labeled"] += 1
            if p.is_known(vendor):
                stats[device_type]["eligible"] += 1
    return stats


def print_status() -> None:
    stats = eligibility()
    print("device_type,candidates,shodan_ok,labeled,eligible,deficit")
    for device_type in p.device_types():
        row = stats[device_type]
        print(
            f"{device_type},{row['candidates']},{row['shodan_ok']},"
            f"{row['labeled']},{row['eligible']},"
            f"{max(0, 200 - row['eligible'])}"
        )


def select_validation() -> None:
    stats = eligibility()
    deficits = {
        device_type: max(0, 200 - row["eligible"])
        for device_type, row in stats.items()
        if row["eligible"] < 200
    }
    if deficits:
        raise RuntimeError(f"eligible samples are insufficient: {deficits}")
    manifest = p.read_csv(p.DATA / "candidate_manifest.csv")
    shodan = {
        row["ip"]: row
        for row in p.read_jsonl(p.DATA / "shodan_hosts.jsonl.gz")
    }
    labels = candidate_labels()
    fingerprints = {
        device_type: {
            row["ip"]: row
            for row in p.read_csv(
                p.DATA / f"candidate_ipraw_{device_type}.csv"
            )
        }
        for device_type in p.device_types()
    }
    selected_by_type: dict[str, list[dict[str, str]]] = defaultdict(list)
    for row in manifest:
        device_type = row["device_type"]
        ip = row["ip"]
        vendor = labels[device_type].get(ip, "")
        if (shodan.get(ip) or {}).get("status") != "ok":
            continue
        if not p.is_known(vendor):
            continue
        if len(selected_by_type[device_type]) < 200:
            selected_by_type[device_type].append(row)

    selected_manifest = []
    for device_type in p.device_types():
        selected = selected_by_type[device_type]
        selected_ips = [row["ip"] for row in selected]
        selected_manifest.extend(selected)
        p.atomic_csv(
            p.DATA / f"ipraw_{device_type}.csv",
            [fingerprints[device_type][ip] for ip in selected_ips],
            p.CSV_FIELDS,
        )
        p.atomic_csv(
            p.LABEL / f"label_{device_type}.csv",
            [
                {"ip": ip, "vendor": labels[device_type][ip]}
                for ip in selected_ips
            ],
            ["ip", "vendor"],
        )
    p.atomic_csv(
        p.DATA / "validation_manifest.csv",
        selected_manifest,
        ["sample_id", "device_type", "ip", "query_rank", "collected_at"],
    )
    p.atomic_json(
        p.DATA / "selection_metadata.json",
        {
            "selected_at": p.utc_now(),
            "label_source": "IoTProber",
            "selection_requirements": {
                "per_device_type": 200,
                "shodan_status": "ok",
                "vendor_label": "non-Unknown",
            },
            "pool_stats": stats,
            "selected_counts": {
                device_type: len(rows)
                for device_type, rows in selected_by_type.items()
            },
        },
    )
    print("[select] wrote 2,200 final validation samples")


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    subs = parser.add_subparsers(dest="command", required=True)
    expand = subs.add_parser("expand")
    expand.add_argument("--target", type=int, required=True)
    expand.add_argument("--devices", nargs="*")
    subs.add_parser("snapshot")
    subs.add_parser("collect-shodan")
    prepare = subs.add_parser("prepare-label-round")
    prepare.add_argument("--round", required=True)
    prepare.add_argument("--batch-size", type=int, default=5)
    run = subs.add_parser("run-label-round")
    run.add_argument("--round", required=True)
    run.add_argument("--workers", type=int, default=8)
    run.add_argument("--model", required=True)
    parse = subs.add_parser("parse-label-round")
    parse.add_argument("--round", required=True)
    subs.add_parser("status")
    subs.add_parser("select")
    return parser.parse_args()


def main() -> None:
    args = parse_args()
    if args.command == "expand":
        expand_pool(args.target, args.devices)
    elif args.command == "snapshot":
        snapshot_pool()
    elif args.command == "collect-shodan":
        asyncio.run(collect_candidate_shodan())
    elif args.command == "prepare-label-round":
        prepare_label_round(args.round, args.batch_size)
    elif args.command == "run-label-round":
        run_label_round(args.round, args.workers, args.model)
    elif args.command == "parse-label-round":
        parse_label_round(args.round)
    elif args.command == "status":
        print_status()
    elif args.command == "select":
        select_validation()


if __name__ == "__main__":
    main()