from dataclasses import dataclass, make_dataclass
from enum import Enum

import pandas as pd

from src.about import Tasks

def fields(raw_class):
    if hasattr(raw_class, '__dataclass_fields__'):
        # For make_dataclass created classes
        if raw_class.__dataclass_fields__:
            return [field.type for field in raw_class.__dataclass_fields__.values()]
        else:
            # For regular @dataclass with empty __dataclass_fields__, check __dict__
            return [v for k, v in raw_class.__dict__.items() if k[:2] != "__" and k[-2:] != "__" and hasattr(v, 'name')]
    # Fallback for non-dataclass
    return [v for k, v in raw_class.__dict__.items() if k[:2] != "__" and k[-2:] != "__" and hasattr(v, 'name')]


# These classes are for user facing column names,
# to avoid having to change them all around the code
# when a modif is needed
@dataclass
class ColumnContent:
    name: str
    type: str
    displayed_by_default: bool
    hidden: bool = False
    never_hidden: bool = False

## Leaderboard columns
auto_eval_column_dict = []
# Init
auto_eval_column_dict.append(("model_type_symbol", ColumnContent("T", "str", True, never_hidden=True)))
auto_eval_column_dict.append(("model", ColumnContent("Model", "markdown", True, never_hidden=True)))
# Average score
auto_eval_column_dict.append(("average", ColumnContent("Average", "number", True)))
#Scores
for task in Tasks:
    auto_eval_column_dict.append((task.name, ColumnContent(task.value.col_name, "number", True)))
# Model information - simplified to only essential columns

# We use make dataclass to dynamically fill the scores from Tasks
AutoEvalColumn = make_dataclass("AutoEvalColumn", auto_eval_column_dict, frozen=True)

## For the queue columns in the submission tab
@dataclass(frozen=True)
class EvalQueueColumn:  # Queue column
    model = ColumnContent("model", "markdown", True)
    revision = ColumnContent("revision", "str", True)
    precision = ColumnContent("precision", "str", True)
    model_type = ColumnContent("model_type", "str", True)
    status = ColumnContent("status", "str", True)

## All the model information that we might need
@dataclass
class ModelDetails:
    name: str
    display_name: str = ""
    symbol: str = "" # emoji


class ModelType(Enum):
    ENCODER = ModelDetails(name="encoder", symbol="🔤")  # BERT-like
    DECODER = ModelDetails(name="decoder", symbol="🔽")  # GPT-like  
    ENCODER_DECODER = ModelDetails(name="encoder-decoder", symbol="🔄")  # T5-like
    Unknown = ModelDetails(name="unknown", symbol="?")

    def to_str(self, separator=" "):
        return f"{self.value.symbol}{separator}{self.value.name}"

    @staticmethod
    def from_str(type_str):
        if "encoder-decoder" in type_str.lower() or "🔄" in type_str:
            return ModelType.ENCODER_DECODER
        elif "encoder" in type_str.lower() or "🔤" in type_str:
            return ModelType.ENCODER
        elif "decoder" in type_str.lower() or "🔽" in type_str:
            return ModelType.DECODER
        return ModelType.Unknown

    @staticmethod
    def from_config(config):
        """Detect model architecture type from config"""
        if hasattr(config, 'model_type'):
            model_type = config.model_type.lower()
            
            # Encoder-decoder models
            if model_type in ['t5', 'bart', 'pegasus', 'mbart', 'blenderbot', 'bigbird_pegasus']:
                return ModelType.ENCODER_DECODER
            
            # Decoder-only models (GPT-like)
            elif model_type in ['gpt', 'gpt2', 'gpt_neo', 'gpt_neox', 'gptj', 'bloom', 'llama', 'mistral', 'qwen']:
                return ModelType.DECODER
            
            # Encoder-only models (BERT-like) 
            elif model_type in ['bert', 'roberta', 'camembert', 'distilbert', 'electra', 'deberta', 'albert']:
                return ModelType.ENCODER
        
        # Fallback: detect from architecture class name
        if hasattr(config, 'architectures') and config.architectures:
            arch_name = config.architectures[0].lower()
            
            if any(name in arch_name for name in ['t5', 'bart', 'pegasus', 'mbart', 'blenderbot']):
                return ModelType.ENCODER_DECODER
            elif any(name in arch_name for name in ['gpt', 'bloom', 'llama', 'mistral', 'qwen']):
                return ModelType.DECODER  
            elif any(name in arch_name for name in ['bert', 'roberta', 'camembert', 'distilbert', 'electra', 'deberta', 'albert']):
                return ModelType.ENCODER
        
        return ModelType.Unknown

    @staticmethod
    def from_architecture(architecture):
        """Detect model type from architecture string"""
        if not architecture or architecture == "?":
            return ModelType.Unknown
            
        arch_lower = architecture.lower()
        
        # Encoder-decoder patterns
        if any(pattern in arch_lower for pattern in ['t5', 'bart', 'pegasus', 'mbart', 'blenderbot']):
            return ModelType.ENCODER_DECODER
        
        # Decoder patterns (GPT-like)
        elif any(pattern in arch_lower for pattern in ['gpt', 'bloom', 'llama', 'mistral', 'qwen', 'causal']):
            return ModelType.DECODER
        
        # Encoder patterns (BERT-like)
        elif any(pattern in arch_lower for pattern in ['bert', 'roberta', 'camembert', 'distilbert', 'electra', 'deberta', 'albert', 'formaskedlm', 'fortokenclassification', 'forsequenceclassification']):
            return ModelType.ENCODER
        
        return ModelType.Unknown

class WeightType(Enum):
    Original = ModelDetails("Original")

class Precision(Enum):
    float16 = ModelDetails("float16")
    bfloat16 = ModelDetails("bfloat16")
    Unknown = ModelDetails("?")

    @staticmethod
    def from_str(precision):
        if precision in ["torch.float16", "float16"]:
            return Precision.float16
        if precision in ["torch.bfloat16", "bfloat16"]:
            return Precision.bfloat16
        return Precision.Unknown

# Column selection
COLS = [c.name for c in fields(AutoEvalColumn) if not c.hidden]

EVAL_COLS = [c.name for c in fields(EvalQueueColumn)]
EVAL_TYPES = [c.type for c in fields(EvalQueueColumn)]

BENCHMARK_COLS = [t.value.col_name for t in Tasks]