from logging import getLogger
from json import loads, JSONDecodeError
from os import environ, chmod, stat
from stat import S_IEXEC
from asyncio import create_subprocess_exec, subprocess
from pathlib import Path
from contextlib import contextmanager
from random import Random
from hashlib import sha256
from re import sub
import re

from jinja2 import Template
import petname
import ast

from scorevision.utils.settings import get_settings
from scorevision.utils.huggingface_helpers import get_huggingface_repo_name

from scorevision.utils.async_clients import get_async_client

logger = getLogger(__name__)


@contextmanager
def temporary_chutes_config_file(prefix: str, delete: bool = True):
    settings = get_settings()
    tmp_path = settings.PATH_CHUTE_TEMPLATES / f"{prefix}.py"
    try:
        with open(tmp_path, "w+") as f:
            yield f, tmp_path
    finally:
        if delete:
            tmp_path.unlink(missing_ok=True)


def generate_nickname(key: str) -> str:
    petname.random = Random(int(key, 16))
    return petname.Generate(words=1, separator="-")


def get_chute_name(hf_revision: str) -> str:
    settings = get_settings()
    nickname = generate_nickname(key=hf_revision)
    logger.info(f"Hf Revision ({hf_revision}) -> Nickname ({nickname})")
    return f"turbovision-{settings.HUGGINGFACE_USERNAME.replace('/','-')}-{nickname}".lower()


def guess_chute_slug(hf_revision: str) -> str:
    settings = get_settings()
    chute_username = settings.CHUTES_USERNAME.replace("_", "-")
    chute_name = get_chute_name(hf_revision=hf_revision)
    return f"{chute_username}-{chute_name}"


def render_chute_template(
    revision: str,
) -> Template:

    settings = get_settings()
    template = Template(settings.PATH_CHUTE_SCRIPT.read_text())
    rendered = template.render(
        huggingface_repository_name=get_huggingface_repo_name(),
        huggingface_repository_revision=revision,
        chute_username=settings.CHUTES_USERNAME,
        chute_name=get_chute_name(hf_revision=revision),
    )
    return rendered


async def get_chute_slug_and_id(revision: str) -> tuple[str | None, str | None]:
    settings = get_settings()
    proc = await create_subprocess_exec(
        "chutes",
        "chutes",
        "get",
        get_chute_name(hf_revision=revision),
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        stdin=subprocess.PIPE,
        env={
            **environ,
            "CHUTES_API_KEY": settings.CHUTES_API_KEY.get_secret_value(),
        },
    )
    out, _ = await proc.communicate()
    log = out.decode(errors="ignore")
    logger.info(log[-800:])
    if proc.returncode != 0:
        logger.error(log)
        raise ValueError("Chutes Query failed.")
    json_tail_of_log = "{" + "{".join(log.split("{")[1:])
    logger.info(json_tail_of_log)
    try:
        json_response = loads(json_tail_of_log)
    except JSONDecodeError as e:
        logger.error(f"Failed to parse JSON from chutes output: {e}")
        json_response = {}
    slug = json_response.get("slug")
    chute_id = json_response.get("chute_id")
    if slug:
        logger.info(f"Slug found: {slug}\n Chute Id: {chute_id}")
        return slug, chute_id
    slug = guess_chute_slug(hf_revision=revision)
    logger.info(f"No Slug returned. Guessing Slug {slug}\n Chute Id: {chute_id}")
    return slug, chute_id


async def share_chute(chute_id: str) -> None:
    logger.info(
        "🤝 Temporary fix: Sharing private chute with the only testnet Vali to allow querying"
    )
    TESTNET_VALIDATOR_CHUTES_ID = "036aed78-6188-5919-94cb-71b61ededd63"

    settings = get_settings()
    proc = await create_subprocess_exec(
        "chutes",
        "share",
        "--chute-id",
        chute_id,
        "--user-id",
        TESTNET_VALIDATOR_CHUTES_ID,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        stdin=subprocess.PIPE,
        env={
            **environ,
            "CHUTES_API_KEY": settings.CHUTES_API_KEY.get_secret_value(),
        },
    )
    if proc.stdin:
        proc.stdin.write(b"y\n")
        await proc.stdin.drain()
        proc.stdin.close()

    # Read and log output line by line as it appears
    assert proc.stdout is not None
    full_output = []
    while True:
        line = await proc.stdout.readline()
        if not line:
            break
        decoded_line = line.decode(errors="ignore").rstrip()
        full_output.append(decoded_line)
        logger.info(f"[chutes share] {decoded_line}")

    returncode = await proc.wait()
    if returncode != 0:
        raise ValueError("Chutes sharing failed.")


async def build_chute(path: Path) -> None:
    logger.info(
        "🚧 Building model on chutes... This may take a while. Please don't exit."
    )

    settings = get_settings()
    proc = await create_subprocess_exec(
        "chutes",
        "build",
        f"{path.stem}:chute",
        "--public",
        "--wait",
        "--debug",
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        stdin=subprocess.PIPE,
        env={
            **environ,
            "CHUTES_API_KEY": settings.CHUTES_API_KEY.get_secret_value(),
        },
        cwd=str(path.parent),
    )
    if proc.stdin:
        proc.stdin.write(b"y\n")  # auto-confirm
        await proc.stdin.drain()
        proc.stdin.close()

    # Read and log output line by line as it appears
    assert proc.stdout is not None
    full_output = []
    while True:
        line = await proc.stdout.readline()
        if not line:
            break
        decoded_line = line.decode(errors="ignore").rstrip()
        full_output.append(decoded_line)
        logger.info(f"[chutes build] {decoded_line}")

    returncode = await proc.wait()
    if returncode != 0:
        out_text = "\n".join(full_output)
        if "already exists" in out_text.lower():
            logger.warning(
                "[chutes build] Image already exists; continuing to deploy."
            )
        else:
            raise ValueError("Chutes building failed.")


async def warmup_chute(chute_id: str) -> None:
    logger.info("🧊🔥 Warming up chute..")

    settings = get_settings()
    proc = await create_subprocess_exec(
        "chutes",
        "warmup",
        chute_id,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        stdin=subprocess.PIPE,
        env={
            **environ,
            "CHUTES_API_KEY": settings.CHUTES_API_KEY.get_secret_value(),
        },
    )
    if proc.stdin:
        proc.stdin.write(b"y\n")  # auto-confirm
        await proc.stdin.drain()
        proc.stdin.close()

    assert proc.stdout is not None
    full_output = []
    while True:
        line = await proc.stdout.readline()
        if not line:
            break
        decoded_line = line.decode(errors="ignore").rstrip()
        full_output.append(decoded_line)
        logger.info(f"[chutes warmup] {decoded_line}")

    returncode = await proc.wait()
    if returncode != 0:
        raise ValueError("Chutes warmup failed.")


async def deploy_chute(path: Path) -> None:
    logger.info("🚀 Deploying model to chutes... This may take a moment..")

    settings = get_settings()
    proc = await create_subprocess_exec(
        "chutes",
        "deploy",
        f"{path.stem}:chute",
        # "--public",
        "--accept-fee",
        # "--logging-enabled",
        "--debug",
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        stdin=subprocess.PIPE,
        env={
            **environ,
            "CHUTES_API_KEY": settings.CHUTES_API_KEY.get_secret_value(),
        },
        cwd=str(path.parent),
    )
    if proc.stdin:
        proc.stdin.write(b"y\n")  # auto-confirm
        await proc.stdin.drain()
        proc.stdin.close()

    assert proc.stdout is not None
    full_output = []
    while True:
        line = await proc.stdout.readline()
        if not line:
            break
        decoded_line = line.decode(errors="ignore").rstrip()
        full_output.append(decoded_line)
        logger.info(f"[chutes deploy] {decoded_line}")

    returncode = await proc.wait()
    if returncode != 0:
        raise ValueError("Chutes deployment failed.")


async def build_and_deploy_chute(path: Path) -> None:
    settings = get_settings()
    if not settings.CHUTES_API_KEY.get_secret_value():
        raise ValueError("CHUTES_API_KEY missing.")
    chmod(str(path), stat(str(path)).st_mode | S_IEXEC)
    await build_chute(path=path)
    await deploy_chute(path=path)


async def call_chutes_list_models() -> dict | str:
    settings = get_settings()
    session = await get_async_client()
    async with session.get(
        f"{settings.CHUTES_MINERS_ENDPOINT}/chutes/",
        headers={"Authorization": settings.CHUTES_API_KEY.get_secret_value()},
    ) as response:
        t = await response.text()
        logger.info(t)
        if response.status != 200:
            raise RuntimeError(f"{response.status}: {t[:200]}")
        try:
            return await response.json()
        except Exception as e:
            logger.error(e)
            return t


async def resolve_chute_id_and_slug(model_name: str) -> tuple[str, str]:
    """Jon: you can always query the /chutes/ endpoint (either list, or /chutes/{chute_id} on the API and extract the slug parameter for the subdomain"""
    chute_id = None
    chute_slug = None

    response = await call_chutes_list_models()
    if isinstance(response, dict) and "items" in response:
        chutes_list = response["items"]
    elif isinstance(response, list):
        chutes_list = response
    else:
        logger.error(response)
        chutes_list = []

    for ch in reversed(chutes_list):
        if any(ch.get(k) == model_name for k in ("model_name", "name", "readme")):
            chute_id = ch.get("chute_id") or ch.get("name") or ch.get("readme")
            chute_slug = ch.get("slug")
    if not chute_id or not chute_slug:
        raise Exception("Could not resolve chute_id/slug after deploy.")

    return chute_id, chute_slug


async def deploy_to_chutes(revision: str, skip: bool) -> tuple[str | None, str | None]:
    if skip:
        return None, None

    settings = get_settings()
    try:
        chute_deployment_script = render_chute_template(
            revision=revision,
        )
        with temporary_chutes_config_file(prefix="sv_chutes", delete=True) as (
            tmp,
            tmp_path,
        ):
            tmp.write(chute_deployment_script)
            tmp.flush()
            logger.info(f"Wrote Chute script with user-specific data: {tmp_path}")
            await build_and_deploy_chute(path=tmp_path)
        chute_slug, chute_id = await get_chute_slug_and_id(revision=revision)
        logger.info(f"Deployed chute_id={chute_id} slug={chute_slug}")
        return chute_id, chute_slug
    except Exception as e:
        logger.error(e)
        return None, None


def mask_and_encode(content: bytes) -> str:
    content_masked = content.decode("utf-8", errors="replace")
    content_masked = sub(
        r'HF_REPO_NAME\s*=\s*["\'].*?["\']', 'HF_REPO_NAME=""', content_masked
    )
    content_masked = sub(
        r'HF_REPO_REVISION\s*=\s*["\'].*?["\']', 'HF_REPO_REVISION=""', content_masked
    )
    content_masked = sub(
        r'CHUTES_USERNAME\s*=\s*["\'].*?["\']', 'CHUTES_USERNAME=""', content_masked
    )
    content_masked = sub(
        r'CHUTE_NAME\s*=\s*["\'].*?["\']', 'CHUTE_NAME=""', content_masked
    )
    source_code_tree = ast.parse(content_masked)
    normalised_source_code = ast.dump(source_code_tree, include_attributes=False)
    return sha256(normalised_source_code.encode("utf-8")).hexdigest()

def _extract_hf_repo_info(source: str) -> tuple[str | None, str | None]:
    """Extract HF_REPO_NAME and HF_REPO_REVISION from the miner source code."""
    name_match = re.search(
        r'HF_REPO_NAME\s*=\s*[\'"]([^\'"]+)[\'"]',
        source,
    )
    rev_match = re.search(
        r'HF_REPO_REVISION\s*=\s*[\'"]([^\'"]+)[\'"]',
        source,
    )
    hf_repo_name = name_match.group(1) if name_match else None
    hf_repo_revision = rev_match.group(1) if rev_match else None
    return hf_repo_name, hf_repo_revision


async def validate_chute_integrity(
    chute_id: str,
) -> tuple[bool, str | None, str | None]:
    """Check the deployed chute's code has not been modified in any way,
    and extract HF_REPO_NAME / HF_REPO_REVISION from the miner code.

    Returns:
        (valid_hash, hf_repo_name, hf_repo_revision)
    """

    settings = get_settings()
    original_bytes = settings.PATH_CHUTE_SCRIPT.read_bytes()
    original_hash = mask_and_encode(content=original_bytes)
    logger.info(f"Original source code: {original_hash[:10]}...")

    session = await get_async_client()
    try:
        async with session.get(
            f"{settings.CHUTES_MINERS_ENDPOINT}/chutes/code/{chute_id}",
            headers={"Authorization": settings.CHUTES_API_KEY.get_secret_value()},
        ) as response:
            response.raise_for_status()
            remote_bytes = await response.read()
            miner_hash = mask_and_encode(content=remote_bytes)
            logger.info(f"Miner's source code: {miner_hash[:10]}...")
    except Exception as e:
        logger.error(f"❌ Error reading miner's source code: {e}")
        return False, None, None

    remote_text = remote_bytes.decode("utf-8", errors="replace")
    hf_repo_name, hf_repo_revision = _extract_hf_repo_info(remote_text)

    if hf_repo_name or hf_repo_revision:
        logger.info(f"HF_REPO_NAME     (miner) = {hf_repo_name}")
        logger.info(f"HF_REPO_REVISION (miner) = {hf_repo_revision}")
    else:
        logger.warning(
            "⚠️ Could not extract HF_REPO_NAME / HF_REPO_REVISION from miner code"
        )

    valid = original_hash == miner_hash
    if valid:
        logger.info("✅ Miner's source code matches original")
    else:
        logger.warning("❌ Miner's source code was modified. Do not trust!")
        logger.warning(
            "Validator:%s",
            original_bytes.decode("utf-8", errors="replace"),
        )
        logger.warning("Miner:%s", remote_text)

    return valid, hf_repo_name, hf_repo_revision