#
# Copyright 2016 The BigDL Authors.
#
# 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 json
import logging
import os
from harness_to_leaderboard import *
from lm_eval import tasks, evaluator, utils, models

from bigdl_llm import BigDLLM
models.MODEL_REGISTRY['bigdl-llm'] = BigDLLM    # patch bigdl-llm to harness

logging.getLogger("openai").setLevel(logging.WARNING)


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument("--model", required=True)
    parser.add_argument("--model_args", default="")
    parser.add_argument("--pretrained", required=True, type=str)
    parser.add_argument("--tasks", required=True, nargs='+', type=str)
    parser.add_argument("--precision", required=True, nargs='+', type=str)
    parser.add_argument("--provide_description", action="store_true")
    parser.add_argument("--num_fewshot", type=int, default=0)
    parser.add_argument("--batch_size", type=str, default=None)
    parser.add_argument(
        "--max_batch_size",
        type=int,
        default=None,
        help="Maximal batch size to try with --batch_size auto",
    )
    parser.add_argument("--device", type=str, default=None)
    parser.add_argument("--output_path", default=None)
    parser.add_argument(
        "--limit",
        type=float,
        default=None,
        help="Limit the number of examples per task. "
        "If <1, limit is a percentage of the total number of examples.",
    )
    parser.add_argument("--data_sampling", type=float, default=None)
    parser.add_argument("--no_cache", action="store_true")
    parser.add_argument("--decontamination_ngrams_path", default=None)
    parser.add_argument("--description_dict_path", default=None)
    parser.add_argument("--check_integrity", action="store_true")
    parser.add_argument("--write_out", action="store_true", default=False)
    parser.add_argument("--output_base_path", type=str, default=None)

    return parser.parse_args()


def main():
    args = parse_args()
    
    assert not args.provide_description  # not implemented

    if args.limit:
        print(
            "WARNING: --limit SHOULD ONLY BE USED FOR TESTING. REAL METRICS SHOULD NOT BE COMPUTED USING LIMIT."
        )
    
    # if args.tasks is None:
    #     task_names = tasks.ALL_TASKS
    # else:
    #     task_names = utils.pattern_match(args.tasks.split(","), tasks.ALL_TASKS)

    print(f"Selected Tasks: {args.tasks}")

    description_dict = {}
    if args.description_dict_path:
        with open(args.description_dict_path, "r") as f:
            description_dict = json.load(f)

    success = []
    fail = []
    model_name = os.path.basename(os.path.realpath(args.pretrained))
    output_path = args.output_path if args.output_path else "results"
    for prec in args.precision:
        prec_arg = parse_precision(prec, args.model)
        model_args = f"pretrained={args.pretrained},{prec_arg}"
        if len(args.model_args) > 0:
            model_args = f"{model_args},{args.model_args}"
        for task in args.tasks:
            task_names=task_map.get(task, task).split(',')
            num_fewshot = task_to_n_few_shots.get(task, args.num_fewshot)
            log_dir = f"{output_path}/{model_name}/{args.device}/{prec}/{task}"
            os.makedirs(log_dir, exist_ok=True)
            try:
                results = evaluator.simple_evaluate(
                    model=args.model,
                    model_args=model_args,
                    tasks=task_names,
                    num_fewshot=num_fewshot,
                    batch_size=args.batch_size,
                    max_batch_size=args.max_batch_size,
                    device=args.device,
                    no_cache=args.no_cache,
                    limit=args.limit,
                    description_dict=description_dict,
                    decontamination_ngrams_path=args.decontamination_ngrams_path,
                    check_integrity=args.check_integrity,
                    write_out=args.write_out,
                    output_base_path=log_dir
                )
                if len(results['results']) > 1:
                    average = {}
                    for _, subtask in results['results'].items():
                        for metric, value in subtask.items():
                            average[metric] = average.get(metric, []) + [value]
                    for k, v in average.items():
                        average[k] = sum(v) / len(v) if not k.endswith("_stderr") else 0
                    results['results'][task] = average
                    results['versions'][task] = 1

                dumped = json.dumps(results, indent=2)
                print(dumped)

                if args.output_path:
                    with open(f"{log_dir}/result.json", "w") as f:
                        f.write(dumped)
                success.append(results)
            except Exception as e:
                fail.append(f"Job config of task={task}, precision={prec} failed. Error Message: {str(e)}")
                print(f"Job config of task={task}, precision={prec} failed. Error Message: {str(e)}")
    
    ## print all task summary
    print("Here are results of all successful tasks:")
    for results in success:
        print(results['config'])
        print(evaluator.make_table(results))

    if len(fail) > 0:
        raise RuntimeError('\n'.join(fail))
    

if __name__ == "__main__":
    main()
