import os
from typing import Any, Dict, List

import colossal_eval.evaluate.gpt_evaluate as gpt_evaluate

from .utils import get_data_per_category


class Evaluator(object):
    """
    A class named Evaluator includes GPT-3.5/GPT-4 evaluation

    """

    def __init__(
        self,
        params: Dict[str, Any],
        battle_prompt: Dict[str, Any],
        gpt_evaluation_prompt: Dict[str, Any],
        gpt_model: str,
        language: str,
        gpt_with_reference: bool,
    ) -> None:
        self.params = params
        self.battle_prompt = battle_prompt
        self.gpt_evaluation_prompt = gpt_evaluation_prompt
        self.gpt_model = gpt_model
        self.language = language
        self.gpt_with_reference = gpt_with_reference
        self.gpt_evaluation_results = dict()
        self.battle_results = []

    def battle(self, answers1: List[Dict], answers2: List[Dict]) -> None:
        """
        Comparison between two models using GPT-4 as the reviewer.
        """

        self.battle_results = gpt_evaluate.battle(answers1, answers2, self.battle_prompt)

    def evaluate(self, answers: List[Dict], targets: List[Dict], save_path: str, model_name: str) -> None:
        """
        A comprehensive evaluation of the answers from the model.
        The function evaluates the model's performance from different perspectives
        using GPT-3.5, GPT-4, and off-the-shelf evaluation metrics.

        The metrics will be decided by the config file.

        """

        answers_per_category = get_data_per_category(answers, list(self.params.keys()))
        targets_per_category = get_data_per_category(targets, list(self.params.keys()))

        # gpt evaluation
        for category in self.params:
            if len(answers_per_category[category]) == 0:
                print(f"Category {category} specified in your config doesn't have corresponding answers!")
                continue

            if self.params[category].get("GPT", None) is None:
                continue

            category_metrics = self.params[category]["GPT"]

            prompt = self.gpt_evaluation_prompt.get(category, None)
            if prompt is None:
                print(f"No prompt for category {category}! Use prompt for category general now.")
                prompt = self.gpt_evaluation_prompt["general"]

            self.gpt_evaluation_results[category] = gpt_evaluate.evaluate(
                answers_per_category[category],
                prompt,
                category_metrics,
                category,
                save_path,
                model_name,
                self.gpt_model,
                self.language,
                references=targets_per_category[category] if self.gpt_with_reference else None,
            )

    def save(self, path: str, model_name_list: List[str]) -> None:
        """
        Save evaluation results of GPT-3.5, GPT-4, and off-the-shelf evaluation metrics.

        """

        if len(model_name_list) == 2:
            save_path = os.path.join(path, "gpt_evaluate", "battle_results")
            gpt_evaluate.save_battle_results(self.battle_results, model_name_list[0], model_name_list[1], save_path)
        else:
            if self.gpt_evaluation_results:
                # Save evaluation results for GPT evaluation metrics.
                gpt_base_save_path = os.path.join(path, "gpt_evaluate", "gpt_evaluate_results")
                gpt_evaluation_results_save_path = os.path.join(gpt_base_save_path, "evaluation_results")

                all_evaluations = gpt_evaluate.save_gpt_evaluation_results(
                    model_name_list[0], self.gpt_evaluation_results, gpt_evaluation_results_save_path
                )

                # Start to calculate scores and save statistics.
                gpt_evaluation_statistics_save_path = os.path.join(gpt_base_save_path, "evaluation_statistics")
                gpt_evaluate.save_gpt_evaluation_statistics(
                    model_name_list[0], all_evaluations, gpt_evaluation_statistics_save_path
                )

                # Save charts and csv.
                gpt_evaluation_analyses_save_path = os.path.join(gpt_base_save_path, "evaluation_analyses")
                gpt_evaluate.analyze_gpt_evaluation_statistics(
                    gpt_evaluation_statistics_save_path, gpt_evaluation_analyses_save_path
                )