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#
# 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 difflib

from paddleformers.trl.llm_utils import init_dist_env

from fastdeploy.rl.rollout_config import RolloutModelConfig
from fastdeploy.rl.rollout_model import RolloutModel

_, ranks = init_dist_env()


# base result
base_path = os.getenv("MODEL_PATH")
model_path = os.path.join(base_path, "ernie-4_5-vl-28b-a3b-bf16-paddle")

# Usage example:
init_kwargs = {
    "model_name_or_path": MODEL_PATH,
    "max_model_len": 32768,
    "tensor_parallel_size": ranks,
    "dynamic_load_weight": True,
    "load_strategy": "ipc_snapshot",
    "enable_mm": True,
    "quantization": "wint8",
}

rollout_config = RolloutModelConfig(**init_kwargs)
actor_eval_model = RolloutModel(rollout_config)

content = ""
for k, v in actor_eval_model.state_dict().items():
    content += f"{k}\n"
for k, v in actor_eval_model.get_name_mappings_to_training().items():
    content += f"{k}:{v}\n"

# with open("baseline.txt", "w", encoding="utf-8") as f:
#     f.write(baseline)

def compare_strings(a: str, b: str) -> bool:
    if a == b:
        print("✅ 两个字符串完全一致")
        return True

    print("❌ 字符串不一致，差异如下（上下文差异显示）：")
    diff = difflib.ndiff(a.splitlines(), b.splitlines())
    for line in diff:
        if line.startswith("- ") or line.startswith("+ "):
            print(line)

    return False

with open("baseline.txt", "r", encoding="utf-8") as f:
    baseline = f.read()
    assert compare_strings(baseline, content), "In the unittest of RL scenario, your modification " \
        "caused inconsistency in the content before and after. Please fix it. " \
        "Can request assistance from yuanlehome or gzy19990617 (github id)."
