import json
import os
from typing import Any, Dict
import pandas as pd
from huggingface_hub import HfApi, hf_hub_download, metadata_load
from .dataset_handler import DATASETS_KEYWORDS, get_datasets_nickname

BLOCKLIST = [
    "rlhf_all",
    "Qwen2.5-Coder-7B-Instruct_lora_r16a32-java",
    "Qwen2.5-Coder-7B-Instruct_lora_r16a32-python",
    "Qwen2.5-Coder-7B-Instruct_lora_r16a32-C",
    "Qwen2.5-Coder-7B-Instruct_lora_r16a32-c_sharp",
    "CodeBERT-javascript",
    "Qwen2.5-Coder-1.5B-Instruct_lora_reasoning"
]
USER = "TitanCAProject"

class ModelHandler:
    def __init__(self, model_infos_path="model_infos.json"):
        self.api = HfApi()
        self.model_infos_path = model_infos_path
        self.model_infos = self._load_model_infos()

    def _load_model_infos(self) -> Dict:
        if os.path.exists(self.model_infos_path):
            with open(self.model_infos_path) as f:
                return json.load(f)
        return {}

    def _save_model_infos(self):
        with open(self.model_infos_path, "w") as f:
            json.dump(self.model_infos, f)

    def sanitize_model_name(self, model_name):
        return model_name.replace("/", "_").replace(".", "-thisisapoint-")

    def fuze_model_infos(self, model_name, results):
        for dataset, metrics in results.items():
            if dataset not in self.model_infos[model_name]["results"].keys():
                self.model_infos[model_name]["results"][dataset] = metrics
            else:
                continue

    def get_titan_data(self):
        models = self.api.list_models(author=USER)
        repositories = [model.modelId for model in models]  # type: ignore

        for repo_id in repositories:
            org_name = repo_id.split("/")[0]
            if org_name in BLOCKLIST:
                continue
            files = [f for f in self.api.list_repo_files(repo_id) if f.endswith("metrics.json") or f == "results.json"]

            if len(files) == 0:
                continue
            else:
                for file in files:
                    readme_path = hf_hub_download(repo_id, filename="README.md")
                    meta = metadata_load(readme_path)
                    try:
                        result_path = hf_hub_download(repo_id, filename=file)

                        with open(result_path) as f:
                            results = json.load(f)

                        # Handles the case where the model is both in baseline and outside of it
                        # (prioritizes the non-baseline results)
                        if repo_id in self.model_infos:
                            self.fuze_model_infos(repo_id, results)

                        self.model_infos[repo_id] = {"meta": meta, "results": results}
                    except Exception as e:
                        print(f"Error loading {repo_id} - {e}")
                        continue

    # Compute the average of a metric for each model,
    def compute_averages(self, metric="f03"):
        model_res = {}
        if len(self.model_infos) > 0:
            for model in self.model_infos.keys():
                res = self.model_infos[model]["results"]
                dataset_res = {}
                keywords = DATASETS_KEYWORDS
                for dataset in res.keys():
                    if not any(keyword in dataset for keyword in keywords):
                        continue

                    dataset_nickname = get_datasets_nickname(dataset)
                    dataset_res[dataset_nickname] = res[dataset][metric] if isinstance(res[dataset], dict) else res[dataset]
                model_res[model] = dataset_res

            df = pd.DataFrame(model_res).T

            return df
        return pd.DataFrame()

    @staticmethod
    def add_rank(df: pd.DataFrame) -> pd.DataFrame:
        df.fillna(0.0, inplace=True)
        cols_to_rank = [
            col
            for col in df.columns
            if col
            not in [
                "Model",
                "Train\nSize",
                "Test\nSize",
            ]
        ]

        if len(cols_to_rank) == 1:
            df.sort_values(cols_to_rank[0], ascending=False, inplace=True)
        else:
            df.insert(len(df.columns) - len(cols_to_rank), "Average", df[cols_to_rank].mean(axis=1, skipna=False))
            df.sort_values("Average", ascending=False, inplace=True)

        df.insert(0, "Rank", list(range(1, len(df) + 1)))
        # multiply values by 100 if they are floats and round to 1 decimal place
        for col in df.columns:
            if df[col].dtype == "float64" and df[col].max() <= 1.0:
                df[col] = df[col].apply(lambda x: round(x * 100, 1))
        
        # Move cols_to_rank to the end of the DataFrame
        cols_to_rank.append("Average")
        df = df[[col for col in df if col not in cols_to_rank] + cols_to_rank]
        
        return df