#!/usr/bin/env python3
import argparse
import logging
import subprocess
import os
import csv
import sys
import atexit
from pathlib import Path
from typing import List, Tuple

from github import Github

from build_check import get_release_or_pr
from clickhouse_helper import (
    ClickHouseHelper,
    prepare_tests_results_for_clickhouse,
)
from commit_status_helper import (
    RerunHelper,
    get_commit,
    post_commit_status,
    update_mergeable_check,
    format_description,
)
from docker_pull_helper import get_image_with_version, DockerImage
from env_helper import S3_BUILDS_BUCKET, TEMP_PATH, REPO_COPY
from get_robot_token import get_best_robot_token
from pr_info import FORCE_TESTS_LABEL, PRInfo
from report import TestResult, TestResults, read_test_results
from s3_helper import S3Helper
from stopwatch import Stopwatch
from tee_popen import TeePopen
from upload_result_helper import upload_results
from version_helper import get_version_from_repo

NAME = "Fast test"

# Will help to avoid errors like _csv.Error: field larger than field limit (131072)
csv.field_size_limit(sys.maxsize)


def get_fasttest_cmd(
    workspace: Path,
    output_path: Path,
    repo_path: Path,
    pr_number: int,
    commit_sha: str,
    image: DockerImage,
) -> str:
    return (
        f"docker run --cap-add=SYS_PTRACE --user={os.geteuid()}:{os.getegid()} "
        "--network=host "  # required to get access to IAM credentials
        f"-e FASTTEST_WORKSPACE=/fasttest-workspace -e FASTTEST_OUTPUT=/test_output "
        f"-e FASTTEST_SOURCE=/ClickHouse --cap-add=SYS_PTRACE "
        f"-e FASTTEST_CMAKE_FLAGS='-DCOMPILER_CACHE=sccache' "
        f"-e PULL_REQUEST_NUMBER={pr_number} -e COMMIT_SHA={commit_sha} "
        f"-e COPY_CLICKHOUSE_BINARY_TO_OUTPUT=1 "
        f"-e SCCACHE_BUCKET={S3_BUILDS_BUCKET} -e SCCACHE_S3_KEY_PREFIX=ccache/sccache "
        "-e stage=clone_submodules "
        f"--volume={workspace}:/fasttest-workspace --volume={repo_path}:/ClickHouse "
        f"--volume={output_path}:/test_output {image}"
    )


def process_results(result_directory: Path) -> Tuple[str, str, TestResults]:
    test_results = []  # type: TestResults
    # Just upload all files from result_directory.
    # If task provides processed results, then it's responsible for content of
    # result_directory

    status = []
    status_path = result_directory / "check_status.tsv"
    if status_path.exists():
        logging.info("Found test_results.tsv")
        with open(status_path, "r", encoding="utf-8") as status_file:
            status = list(csv.reader(status_file, delimiter="\t"))
    if len(status) != 1 or len(status[0]) != 2:
        logging.info("Files in result folder %s", os.listdir(result_directory))
        return "error", "Invalid check_status.tsv", test_results
    state, description = status[0][0], status[0][1]

    try:
        results_path = result_directory / "test_results.tsv"
        test_results = read_test_results(results_path)
        if len(test_results) == 0:
            return "error", "Empty test_results.tsv", test_results
    except Exception as e:
        return ("error", f"Cannot parse test_results.tsv ({e})", test_results)

    return state, description, test_results


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
        description="FastTest script",
    )

    parser.add_argument(
        "--timeout",
        type=int,
        # Fast tests in most cases done within 10 min and 40 min timout should be sufficient,
        # though due to cold cache build time can be much longer
        # https://pastila.nl/?146195b6/9bb99293535e3817a9ea82c3f0f7538d.link#5xtClOjkaPLEjSuZ92L2/g==
        default=40,
        help="Timeout in minutes",
    )
    args = parser.parse_args()
    args.timeout = args.timeout * 60
    return args


def main():
    logging.basicConfig(level=logging.INFO)
    stopwatch = Stopwatch()
    args = parse_args()

    temp_path = Path(TEMP_PATH)

    temp_path.mkdir(parents=True, exist_ok=True)

    pr_info = PRInfo()

    gh = Github(get_best_robot_token(), per_page=100)
    commit = get_commit(gh, pr_info.sha)

    atexit.register(update_mergeable_check, gh, pr_info, NAME)

    rerun_helper = RerunHelper(commit, NAME)
    if rerun_helper.is_already_finished_by_status():
        logging.info("Check is already finished according to github status, exiting")
        status = rerun_helper.get_finished_status()
        if status is not None and status.state != "success":
            sys.exit(1)
        sys.exit(0)

    docker_image = get_image_with_version(temp_path, "clickhouse/fasttest")

    s3_helper = S3Helper()

    workspace = temp_path / "fasttest-workspace"
    workspace.mkdir(parents=True, exist_ok=True)

    output_path = temp_path / "fasttest-output"
    output_path.mkdir(parents=True, exist_ok=True)

    repo_path = Path(REPO_COPY)

    run_cmd = get_fasttest_cmd(
        workspace,
        output_path,
        repo_path,
        pr_info.number,
        pr_info.sha,
        docker_image,
    )
    logging.info("Going to run fasttest with cmd %s", run_cmd)

    logs_path = temp_path / "fasttest-logs"
    logs_path.mkdir(parents=True, exist_ok=True)

    run_log_path = logs_path / "run.log"
    timeout_expired = False

    with TeePopen(run_cmd, run_log_path, timeout=args.timeout) as process:
        retcode = process.wait()
        if process.timeout_exceeded:
            logging.info("Timeout expired for command: %s", run_cmd)
            timeout_expired = True
        elif retcode == 0:
            logging.info("Run successfully")
        else:
            logging.info("Run failed")

    subprocess.check_call(f"sudo chown -R ubuntu:ubuntu {temp_path}", shell=True)

    test_output_files = os.listdir(output_path)
    additional_logs = [f for f in output_path.iterdir() if f.is_file()]
    additional_logs.append(run_log_path)

    test_log_exists = (
        "test_log.txt" in test_output_files or "test_result.txt" in test_output_files
    )
    test_result_exists = "test_results.tsv" in test_output_files
    test_results = []  # type: TestResults
    if "submodule_log.txt" not in test_output_files:
        description = "Cannot clone repository"
        state = "failure"
    elif "cmake_log.txt" not in test_output_files:
        description = "Cannot fetch submodules"
        state = "failure"
    elif "build_log.txt" not in test_output_files:
        description = "Cannot finish cmake"
        state = "failure"
    elif "install_log.txt" not in test_output_files:
        description = "Cannot build ClickHouse"
        state = "failure"
    elif not test_log_exists and not test_result_exists:
        description = "Cannot install or start ClickHouse"
        state = "failure"
    else:
        state, description, test_results = process_results(output_path)

    if timeout_expired:
        test_results.append(TestResult.create_check_timeout_expired(args.timeout))
        state = "failure"
        description = format_description(test_results[-1].name)

    ch_helper = ClickHouseHelper()
    s3_path_prefix = "/".join(
        (
            get_release_or_pr(pr_info, get_version_from_repo())[0],
            pr_info.sha,
            "fast_tests",
        )
    )
    build_urls = s3_helper.upload_build_directory_to_s3(
        output_path / "binaries",
        s3_path_prefix,
        keep_dirs_in_s3_path=False,
        upload_symlinks=False,
    )

    report_url = upload_results(
        s3_helper,
        pr_info.number,
        pr_info.sha,
        test_results,
        additional_logs,
        NAME,
        build_urls,
    )
    print(f"::notice ::Report url: {report_url}")
    post_commit_status(commit, state, report_url, description, NAME, pr_info)

    prepared_events = prepare_tests_results_for_clickhouse(
        pr_info,
        test_results,
        state,
        stopwatch.duration_seconds,
        stopwatch.start_time_str,
        report_url,
        NAME,
    )
    ch_helper.insert_events_into(db="default", table="checks", events=prepared_events)

    # Refuse other checks to run if fast test failed
    if state != "success":
        if state == "error":
            print("The status is 'error', report failure disregard the labels")
            sys.exit(1)
        elif FORCE_TESTS_LABEL in pr_info.labels:
            print(f"'{FORCE_TESTS_LABEL}' enabled, reporting success")
        else:
            sys.exit(1)


if __name__ == "__main__":
    main()