import gzip
import io
import json
import os
import zipfile
from pathlib import Path
from typing import Any, Dict, List

import boto3  # type: ignore[import]
import requests
import rockset  # type: ignore[import]

PYTORCH_REPO = "https://api.github.com/repos/pytorch/pytorch"
S3_RESOURCE = boto3.resource("s3")


def _get_request_headers() -> Dict[str, str]:
    return {
        "Accept": "application/vnd.github.v3+json",
        "Authorization": "token " + os.environ["GITHUB_TOKEN"],
    }


def _get_artifact_urls(prefix: str, workflow_run_id: int) -> Dict[Path, str]:
    """Get all workflow artifacts with 'test-report' in the name."""
    response = requests.get(
        f"{PYTORCH_REPO}/actions/runs/{workflow_run_id}/artifacts?per_page=100",
    )
    artifacts = response.json()["artifacts"]
    while "next" in response.links.keys():
        response = requests.get(
            response.links["next"]["url"], headers=_get_request_headers()
        )
        artifacts.extend(response.json()["artifacts"])

    artifact_urls = {}
    for artifact in artifacts:
        if artifact["name"].startswith(prefix):
            artifact_urls[Path(artifact["name"])] = artifact["archive_download_url"]
    return artifact_urls


def _download_artifact(
    artifact_name: Path, artifact_url: str, workflow_run_attempt: int
) -> Path:
    # [Artifact run attempt]
    # All artifacts on a workflow share a single namespace. However, we can
    # re-run a workflow and produce a new set of artifacts. To avoid name
    # collisions, we add `-runattempt1<run #>-` somewhere in the artifact name.
    #
    # This code parses out the run attempt number from the artifact name. If it
    # doesn't match the one specified on the command line, skip it.
    atoms = str(artifact_name).split("-")
    for atom in atoms:
        if atom.startswith("runattempt"):
            found_run_attempt = int(atom[len("runattempt") :])
            if workflow_run_attempt != found_run_attempt:
                print(
                    f"Skipping {artifact_name} as it is an invalid run attempt. "
                    f"Expected {workflow_run_attempt}, found {found_run_attempt}."
                )

    print(f"Downloading {artifact_name}")

    response = requests.get(artifact_url, headers=_get_request_headers())
    with open(artifact_name, "wb") as f:
        f.write(response.content)
    return artifact_name


def download_s3_artifacts(
    prefix: str, workflow_run_id: int, workflow_run_attempt: int
) -> List[Path]:
    bucket = S3_RESOURCE.Bucket("gha-artifacts")
    objs = bucket.objects.filter(
        Prefix=f"pytorch/pytorch/{workflow_run_id}/{workflow_run_attempt}/artifact/{prefix}"
    )

    found_one = False
    paths = []
    for obj in objs:
        found_one = True
        p = Path(Path(obj.key).name)
        print(f"Downloading {p}")
        with open(p, "wb") as f:
            f.write(obj.get()["Body"].read())
        paths.append(p)

    if not found_one:
        print(
            "::warning title=s3 artifacts not found::"
            "Didn't find any test reports in s3, there might be a bug!"
        )
    return paths


def download_gha_artifacts(
    prefix: str, workflow_run_id: int, workflow_run_attempt: int
) -> List[Path]:
    artifact_urls = _get_artifact_urls(prefix, workflow_run_id)
    paths = []
    for name, url in artifact_urls.items():
        paths.append(_download_artifact(Path(name), url, workflow_run_attempt))
    return paths


def upload_to_rockset(collection: str, docs: List[Any]) -> None:
    print(f"Writing {len(docs)} documents to Rockset")
    client = rockset.Client(
        api_server="api.rs2.usw2.rockset.com", api_key=os.environ["ROCKSET_API_KEY"]
    )
    client.Collection.retrieve(collection).add_docs(docs)
    print("Done!")


def upload_to_s3(
    workflow_run_id: int,
    workflow_run_attempt: int,
    collection: str,
    docs: List[Dict[str, Any]],
) -> None:
    print(f"Writing {len(docs)} documents to S3")
    body = io.StringIO()
    for doc in docs:
        json.dump(doc, body)
        body.write("\n")

    S3_RESOURCE.Object(
        "ossci-raw-job-status",
        f"{collection}/{workflow_run_id}/{workflow_run_attempt}",
    ).put(
        Body=gzip.compress(body.getvalue().encode()),
        ContentEncoding="gzip",
        ContentType="application/json",
    )
    print("Done!")


def unzip(p: Path) -> None:
    """Unzip the provided zipfile to a similarly-named directory.

    Returns None if `p` is not a zipfile.

    Looks like: /tmp/test-reports.zip -> /tmp/unzipped-test-reports/
    """
    assert p.is_file()
    unzipped_dir = p.with_name("unzipped-" + p.stem)
    print(f"Extracting {p} to {unzipped_dir}")

    with zipfile.ZipFile(p, "r") as zip:
        zip.extractall(unzipped_dir)