# coding=utf-8
# Copyright 2022 The HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import argparse
import copy
import os
import random
from dataclasses import dataclass
from typing import Any, Dict, List, Optional
import glob
import yaml


COMMON_ENV_VARIABLES = {
    "OMP_NUM_THREADS": 1,
    "TRANSFORMERS_IS_CI": True,
    "PYTEST_TIMEOUT": 120,
    "RUN_PIPELINE_TESTS": False,
    "RUN_PT_TF_CROSS_TESTS": False,
    "RUN_PT_FLAX_CROSS_TESTS": False,
}
# Disable the use of {"s": None} as the output is way too long, causing the navigation on CircleCI impractical
COMMON_PYTEST_OPTIONS = {"max-worker-restart": 0, "dist": "loadfile", "v": None}
DEFAULT_DOCKER_IMAGE = [{"image": "cimg/python:3.8.12"}]


class EmptyJob:
    job_name = "empty"

    def to_dict(self):
        return {
            "docker": copy.deepcopy(DEFAULT_DOCKER_IMAGE),
            "steps":["checkout"],
        }


@dataclass
class CircleCIJob:
    name: str
    additional_env: Dict[str, Any] = None
    cache_name: str = None
    cache_version: str = "0.8.2"
    docker_image: List[Dict[str, str]] = None
    install_steps: List[str] = None
    marker: Optional[str] = None
    parallelism: Optional[int] = 1
    pytest_num_workers: int = 12
    pytest_options: Dict[str, Any] = None
    resource_class: Optional[str] = "2xlarge"
    tests_to_run: Optional[List[str]] = None
    # This should be only used for doctest job!
    command_timeout: Optional[int] = None

    def __post_init__(self):
        # Deal with defaults for mutable attributes.
        if self.additional_env is None:
            self.additional_env = {}
        if self.cache_name is None:
            self.cache_name = self.name
        if self.docker_image is None:
            # Let's avoid changing the default list and make a copy.
            self.docker_image = copy.deepcopy(DEFAULT_DOCKER_IMAGE)
        else:
            # BIG HACK WILL REMOVE ONCE FETCHER IS UPDATED
            print(os.environ.get("GIT_COMMIT_MESSAGE"))
            if "[build-ci-image]" in os.environ.get("GIT_COMMIT_MESSAGE", "") or os.environ.get("GIT_COMMIT_MESSAGE", "") == "dev-ci":
                self.docker_image[0]["image"] = f"{self.docker_image[0]['image']}:dev"
            print(f"Using {self.docker_image} docker image")
        if self.install_steps is None:
            self.install_steps = []
        if self.pytest_options is None:
            self.pytest_options = {}
        if isinstance(self.tests_to_run, str):
            self.tests_to_run = [self.tests_to_run]
        if self.parallelism is None:
            self.parallelism = 1

    def to_dict(self):
        env = COMMON_ENV_VARIABLES.copy()
        env.update(self.additional_env)

        cache_branch_prefix = os.environ.get("CIRCLE_BRANCH", "pull")
        if cache_branch_prefix != "main":
            cache_branch_prefix = "pull"

        job = {
            "docker": self.docker_image,
            "environment": env,
        }
        if self.resource_class is not None:
            job["resource_class"] = self.resource_class
        if self.parallelism is not None:
            job["parallelism"] = self.parallelism
        steps = [
            "checkout",
            {"attach_workspace": {"at": "test_preparation"}},
        ]
        steps.extend([{"run": l} for l in self.install_steps])
        steps.append({"run": {"name": "Show installed libraries and their size", "command": """du -h -d 1 "$(pip -V | cut -d ' ' -f 4 | sed 's/pip//g')" | grep -vE "dist-info|_distutils_hack|__pycache__" | sort -h | tee installed.txt || true"""}})
        steps.append({"run": {"name": "Show installed libraries and their versions", "command": """pip list --format=freeze | tee installed.txt || true"""}})

        steps.append({"run":{"name":"Show biggest libraries","command":"""dpkg-query --show --showformat='${Installed-Size}\t${Package}\n' | sort -rh | head -25 | sort -h | awk '{ package=$2; sub(".*/", "", package); printf("%.5f GB %s\n", $1/1024/1024, package)}' || true"""}})
        steps.append({"store_artifacts": {"path": "installed.txt"}})

        all_options = {**COMMON_PYTEST_OPTIONS, **self.pytest_options}
        pytest_flags = [f"--{key}={value}" if (value is not None or key in ["doctest-modules"]) else f"-{key}" for key, value in all_options.items()]
        pytest_flags.append(
            f"--make-reports={self.name}" if "examples" in self.name else f"--make-reports=tests_{self.name}"
        )

        steps.append({"run": {"name": "Create `test-results` directory", "command": "mkdir test-results"}})
        test_command = ""
        if self.command_timeout:
            test_command = f"timeout {self.command_timeout} "
        # junit familiy xunit1 is necessary to support splitting on test name or class name with circleci split
        test_command += f"python3 -m pytest -rsfE -p no:warnings -o junit_family=xunit1 --tb=short --junitxml=test-results/junit.xml -n {self.pytest_num_workers} " + " ".join(pytest_flags)

        if self.parallelism == 1:
            if self.tests_to_run is None:
                test_command += " << pipeline.parameters.tests_to_run >>"
            else:
                test_command += " " + " ".join(self.tests_to_run)
        else:
            # We need explicit list instead of `pipeline.parameters.tests_to_run` (only available at job runtime)
            tests = self.tests_to_run
            if tests is None:
                folder = os.environ["test_preparation_dir"]
                test_file = os.path.join(folder, "filtered_test_list.txt")
                if os.path.exists(test_file): # We take this job's tests from the filtered test_list.txt
                    with open(test_file) as f:
                        tests = f.read().split(" ")

            # expand the test list
            if tests == ["tests"]:
                tests = [os.path.join("tests", x) for x in os.listdir("tests")]
            expanded_tests = []
            for test in tests:
                if test.endswith(".py"):
                    expanded_tests.append(test)
                elif test == "tests/models":
                    if "tokenization" in self.name:
                        expanded_tests.extend(glob.glob("tests/models/**/test_tokenization*.py", recursive=True))
                    elif self.name in ["flax","torch","tf"]:
                        name = self.name if self.name != "torch" else ""
                        if self.name == "torch":
                            all_tests = glob.glob(f"tests/models/**/test_modeling_{name}*.py", recursive=True) 
                            filtered = [k for k in all_tests if ("_tf_") not in k and "_flax_" not in k]
                            expanded_tests.extend(filtered)
                        else:
                            expanded_tests.extend(glob.glob(f"tests/models/**/test_modeling_{name}*.py", recursive=True))
                    else:
                        expanded_tests.extend(glob.glob("tests/models/**/test_modeling*.py", recursive=True))
                elif test == "tests/pipelines":
                    expanded_tests.extend(glob.glob("tests/models/**/test_modeling*.py", recursive=True)) 
                else:
                    expanded_tests.append(test)
            tests = " ".join(expanded_tests)

            # Each executor to run ~10 tests
            n_executors = max(len(expanded_tests) // 10, 1)
            # Avoid empty test list on some executor(s) or launching too many executors
            if n_executors > self.parallelism:
                n_executors = self.parallelism
            job["parallelism"] = n_executors

            # Need to be newline separated for the command `circleci tests split` below
            command = f'echo {tests} | tr " " "\\n" >> tests.txt'
            steps.append({"run": {"name": "Get tests", "command": command}})

            command = 'TESTS=$(circleci tests split tests.txt) && echo $TESTS > splitted_tests.txt'
            steps.append({"run": {"name": "Split tests", "command": command}})

            steps.append({"store_artifacts": {"path": "tests.txt"}})
            steps.append({"store_artifacts": {"path": "splitted_tests.txt"}})

            test_command = ""
            if self.command_timeout:
                test_command = f"timeout {self.command_timeout} "
            test_command += f"python3 -m pytest -rsfE -p no:warnings --tb=short  -o junit_family=xunit1 --junitxml=test-results/junit.xml -n {self.pytest_num_workers} " + " ".join(pytest_flags)
            test_command += " $(cat splitted_tests.txt)"
        if self.marker is not None:
            test_command += f" -m {self.marker}"

        if self.name == "pr_documentation_tests":
            # can't use ` | tee tee tests_output.txt` as usual
            test_command += " > tests_output.txt"
            # Save the return code, so we can check if it is timeout in the next step.
            test_command += '; touch "$?".txt'
            # Never fail the test step for the doctest job. We will check the results in the next step, and fail that
            # step instead if the actual test failures are found. This is to avoid the timeout being reported as test
            # failure.
            test_command = f"({test_command}) || true"
        else:
            test_command = f"({test_command} | tee tests_output.txt)"
        steps.append({"run": {"name": "Run tests", "command": test_command}})

        steps.append({"run": {"name": "Skipped tests", "when": "always", "command": f"python3 .circleci/parse_test_outputs.py --file tests_output.txt --skip"}})
        steps.append({"run": {"name": "Failed tests",  "when": "always", "command": f"python3 .circleci/parse_test_outputs.py --file tests_output.txt --fail"}})
        steps.append({"run": {"name": "Errors",        "when": "always", "command": f"python3 .circleci/parse_test_outputs.py --file tests_output.txt --errors"}})

        steps.append({"store_test_results": {"path": "test-results"}})
        steps.append({"store_artifacts": {"path": "tests_output.txt"}})
        steps.append({"store_artifacts": {"path": "test-results/junit.xml"}})
        steps.append({"store_artifacts": {"path": "reports"}})

        job["steps"] = steps
        return job

    @property
    def job_name(self):
        return self.name if "examples" in self.name else f"tests_{self.name}"


# JOBS
torch_and_tf_job = CircleCIJob(
    "torch_and_tf",
    docker_image=[{"image":"huggingface/transformers-torch-tf-light"}],
    install_steps=["uv venv && uv pip install ."],
    additional_env={"RUN_PT_TF_CROSS_TESTS": True},
    marker="is_pt_tf_cross_test",
    pytest_options={"rA": None, "durations": 0},
)


torch_and_flax_job = CircleCIJob(
    "torch_and_flax",
    additional_env={"RUN_PT_FLAX_CROSS_TESTS": True},
    docker_image=[{"image":"huggingface/transformers-torch-jax-light"}],
    install_steps=["uv venv && uv pip install ."],
    marker="is_pt_flax_cross_test",
    pytest_options={"rA": None, "durations": 0},
)

torch_job = CircleCIJob(
    "torch",
    docker_image=[{"image": "huggingface/transformers-torch-light"}],
    install_steps=["uv venv && uv pip install ."],
    parallelism=6,
    pytest_num_workers=16
)

tokenization_job = CircleCIJob(
    "tokenization",
    docker_image=[{"image": "huggingface/transformers-torch-light"}],
    install_steps=["uv venv && uv pip install ."],
    parallelism=6,
    pytest_num_workers=16
)


tf_job = CircleCIJob(
    "tf",
    docker_image=[{"image":"huggingface/transformers-tf-light"}],
    install_steps=["uv venv", "uv pip install -e."],
    parallelism=6,
    pytest_num_workers=16,
)


flax_job = CircleCIJob(
    "flax",
    docker_image=[{"image":"huggingface/transformers-jax-light"}],
    install_steps=["uv venv && uv pip install ."],
    parallelism=6,
    pytest_num_workers=16
)


pipelines_torch_job = CircleCIJob(
    "pipelines_torch",
    additional_env={"RUN_PIPELINE_TESTS": True},
    docker_image=[{"image":"huggingface/transformers-torch-light"}],
    install_steps=["uv venv && uv pip install ."],
    marker="is_pipeline_test",
)


pipelines_tf_job = CircleCIJob(
    "pipelines_tf",
    additional_env={"RUN_PIPELINE_TESTS": True},
    docker_image=[{"image":"huggingface/transformers-tf-light"}],
    install_steps=["uv venv && uv pip install ."],
    marker="is_pipeline_test",
)


custom_tokenizers_job = CircleCIJob(
    "custom_tokenizers",
    additional_env={"RUN_CUSTOM_TOKENIZERS": True},
    docker_image=[{"image": "huggingface/transformers-custom-tokenizers"}],
    install_steps=["uv venv","uv pip install -e ."],
    parallelism=None,
    resource_class=None,
    tests_to_run=[
        "./tests/models/bert_japanese/test_tokenization_bert_japanese.py",
        "./tests/models/openai/test_tokenization_openai.py",
        "./tests/models/clip/test_tokenization_clip.py",
    ],
)


examples_torch_job = CircleCIJob(
    "examples_torch",
    additional_env={"OMP_NUM_THREADS": 8},
    cache_name="torch_examples",
    docker_image=[{"image":"huggingface/transformers-examples-torch"}],
    # TODO @ArthurZucker remove this once docker is easier to build
    install_steps=["uv venv && uv pip install . && uv pip install -r examples/pytorch/_tests_requirements.txt"],
    pytest_num_workers=1,
)


examples_tensorflow_job = CircleCIJob(
    "examples_tensorflow",
    cache_name="tensorflow_examples",
    docker_image=[{"image":"huggingface/transformers-examples-tf"}],
    install_steps=["uv venv && uv pip install ."],
    parallelism=8
)


hub_job = CircleCIJob(
    "hub",
    additional_env={"HUGGINGFACE_CO_STAGING": True},
    docker_image=[{"image":"huggingface/transformers-torch-light"}],
    install_steps=[
        "uv venv && uv pip install .",
        'git config --global user.email "ci@dummy.com"',
        'git config --global user.name "ci"',
    ],
    marker="is_staging_test",
    pytest_num_workers=1,
)


onnx_job = CircleCIJob(
    "onnx",
    docker_image=[{"image":"huggingface/transformers-torch-tf-light"}],
    install_steps=[
        "uv venv && uv pip install .",
        "uv pip install --upgrade eager pip",
        "uv pip install .[torch,tf,testing,sentencepiece,onnxruntime,vision,rjieba]",
    ],
    pytest_options={"k onnx": None},
    pytest_num_workers=1,
)


exotic_models_job = CircleCIJob(
    "exotic_models",
    install_steps=["uv venv && uv pip install ."],
    docker_image=[{"image":"huggingface/transformers-exotic-models"}],
    tests_to_run=[
        "tests/models/*layoutlmv*",
        "tests/models/*nat",
        "tests/models/deta",
        "tests/models/udop",
        "tests/models/nougat",
    ],
    pytest_num_workers=12,
    parallelism=4,
    pytest_options={"durations": 100},
)


repo_utils_job = CircleCIJob(
    "repo_utils",
    docker_image=[{"image":"huggingface/transformers-consistency"}],
    install_steps=["uv venv && uv pip install ."],
    parallelism=None,
    pytest_num_workers=1,
    resource_class="large",
    tests_to_run="tests/repo_utils",
)


# We also include a `dummy.py` file in the files to be doc-tested to prevent edge case failure. Otherwise, the pytest
# hangs forever during test collection while showing `collecting 0 items / 21 errors`. (To see this, we have to remove
# the bash output redirection.)
py_command = 'from utils.tests_fetcher import get_doctest_files; to_test = get_doctest_files() + ["dummy.py"]; to_test = " ".join(to_test); print(to_test)'
py_command = f"$(python3 -c '{py_command}')"
command = f'echo "{py_command}" > pr_documentation_tests_temp.txt'
doc_test_job = CircleCIJob(
    "pr_documentation_tests",
    docker_image=[{"image":"huggingface/transformers-consistency"}],
    additional_env={"TRANSFORMERS_VERBOSITY": "error", "DATASETS_VERBOSITY": "error", "SKIP_CUDA_DOCTEST": "1"},
    install_steps=[
        # Add an empty file to keep the test step running correctly even no file is selected to be tested.
        "touch dummy.py",
        {
            "name": "Get files to test",
            "command": command,
        },
        {
            "name": "Show information in `Get files to test`",
            "command":
                "cat pr_documentation_tests_temp.txt"
        },
        {
            "name": "Get the last line in `pr_documentation_tests.txt`",
            "command":
                "tail -n1 pr_documentation_tests_temp.txt | tee pr_documentation_tests.txt"
        },
    ],
    tests_to_run="$(cat pr_documentation_tests.txt)",  # noqa
    pytest_options={"-doctest-modules": None, "doctest-glob": "*.md", "dist": "loadfile", "rvsA": None},
    command_timeout=1200,  # test cannot run longer than 1200 seconds
    pytest_num_workers=1,
)

REGULAR_TESTS = [
    torch_and_tf_job,
    torch_and_flax_job,
    torch_job,
    tf_job,
    flax_job,
    custom_tokenizers_job,
    hub_job,
    onnx_job,
    exotic_models_job,
    tokenization_job
]
EXAMPLES_TESTS = [
    examples_torch_job,
    examples_tensorflow_job,
]
PIPELINE_TESTS = [
    pipelines_torch_job,
    pipelines_tf_job,
]
REPO_UTIL_TESTS = [repo_utils_job]
DOC_TESTS = [doc_test_job]


def create_circleci_config(folder=None):
    if folder is None:
        folder = os.getcwd()
    # Used in CircleCIJob.to_dict() to expand the test list (for using parallelism)
    os.environ["test_preparation_dir"] = folder
    jobs = []
    all_test_file = os.path.join(folder, "test_list.txt")
    if os.path.exists(all_test_file):
        with open(all_test_file) as f:
            all_test_list = f.read()
    else:
        all_test_list = []
    if len(all_test_list) > 0:
        jobs.extend(PIPELINE_TESTS)

    test_file = os.path.join(folder, "filtered_test_list.txt")
    if os.path.exists(test_file):
        with open(test_file) as f:
            test_list = f.read()
    else:
        test_list = []
    if len(test_list) > 0:
        jobs.extend(REGULAR_TESTS)

        extended_tests_to_run = set(test_list.split())
        # Extend the test files for cross test jobs
        for job in jobs:
            if job.job_name in ["tests_torch_and_tf", "tests_torch_and_flax"]:
                for test_path in copy.copy(extended_tests_to_run):
                    dir_path, fn = os.path.split(test_path)
                    if fn.startswith("test_modeling_tf_"):
                        fn = fn.replace("test_modeling_tf_", "test_modeling_")
                    elif fn.startswith("test_modeling_flax_"):
                        fn = fn.replace("test_modeling_flax_", "test_modeling_")
                    else:
                        if job.job_name == "test_torch_and_tf":
                            fn = fn.replace("test_modeling_", "test_modeling_tf_")
                        elif job.job_name == "test_torch_and_flax":
                            fn = fn.replace("test_modeling_", "test_modeling_flax_")
                    new_test_file = str(os.path.join(dir_path, fn))
                    if os.path.isfile(new_test_file):
                        if new_test_file not in extended_tests_to_run:
                            extended_tests_to_run.add(new_test_file)
        extended_tests_to_run = sorted(extended_tests_to_run)
        for job in jobs:
            if job.job_name in ["tests_torch_and_tf", "tests_torch_and_flax"]:
                job.tests_to_run = extended_tests_to_run
        fn = "filtered_test_list_cross_tests.txt"
        f_path = os.path.join(folder, fn)
        with open(f_path, "w") as fp:
            fp.write(" ".join(extended_tests_to_run))

    example_file = os.path.join(folder, "examples_test_list.txt")
    if os.path.exists(example_file) and os.path.getsize(example_file) > 0:
        with open(example_file, "r", encoding="utf-8") as f:
            example_tests = f.read()
        for job in EXAMPLES_TESTS:
            framework = job.name.replace("examples_", "").replace("torch", "pytorch")
            if example_tests == "all":
                job.tests_to_run = [f"examples/{framework}"]
            else:
                job.tests_to_run = [f for f in example_tests.split(" ") if f.startswith(f"examples/{framework}")]

            if len(job.tests_to_run) > 0:
                jobs.append(job)

    doctest_file = os.path.join(folder, "doctest_list.txt")
    if os.path.exists(doctest_file):
        with open(doctest_file) as f:
            doctest_list = f.read()
    else:
        doctest_list = []
    if len(doctest_list) > 0:
        jobs.extend(DOC_TESTS)

    repo_util_file = os.path.join(folder, "test_repo_utils.txt")
    if os.path.exists(repo_util_file) and os.path.getsize(repo_util_file) > 0:
        jobs.extend(REPO_UTIL_TESTS)

    if len(jobs) == 0:
        jobs = [EmptyJob()]
    config = {"version": "2.1"}
    config["parameters"] = {
        # Only used to accept the parameters from the trigger
        "nightly": {"type": "boolean", "default": False},
        "tests_to_run": {"type": "string", "default": test_list},
    }
    config["jobs"] = {j.job_name: j.to_dict() for j in jobs}
    config["workflows"] = {"version": 2, "run_tests": {"jobs": [j.job_name for j in jobs]}}
    with open(os.path.join(folder, "generated_config.yml"), "w") as f:
        f.write(yaml.dump(config, indent=2, width=1000000, sort_keys=False))


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--fetcher_folder", type=str, default=None, help="Only test that all tests and modules are accounted for."
    )
    args = parser.parse_args()

    create_circleci_config(args.fetcher_folder)