from dataclasses import dataclass, field
from enum import Enum

import pandas as pd

from src.about import Tasks


def fields(raw_class):
    return [v for k, v in raw_class.__dict__.items() if k[:2] != "__" and k[-2:] != "__"]


# 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


# ── AutoEvalColumn ────────────────────────────────────────────────────────
# Built as a plain class with class-level attributes so that
# AutoEvalColumn.precision.name  (class-level access used in read_evals.py)
# works correctly on all Python versions.
# Previously used make_dataclass() which only supports instance-level access.
class AutoEvalColumn:
    # Identity
    model_type_symbol = ColumnContent("T",              "str",      True,  never_hidden=True)
    model             = ColumnContent("Model",          "markdown", True,  never_hidden=True)
    # Scores
    average           = ColumnContent("Average ⬆️",    "number",   True)
    # Model information
    model_type        = ColumnContent("Type",                       "str",    False)
    architecture      = ColumnContent("Architecture",               "str",    False)
    weight_type       = ColumnContent("Weight type",                "str",    False, True)
    precision         = ColumnContent("Precision",                  "str",    False)
    license           = ColumnContent("Hub License",                "str",    False)
    params            = ColumnContent("#Params (B)",                "number", False)
    likes             = ColumnContent("Hub ❤️",                    "number", False)
    still_on_hub      = ColumnContent("Available on the hub",       "bool",   False)
    revision          = ColumnContent("Model sha",                  "str",    False, False)


# Dynamically add task score columns from Tasks enum
for task in Tasks:
    setattr(AutoEvalColumn, task.name, ColumnContent(task.value.col_name, "number", True))


## For the queue columns in the submission tab
class EvalQueueColumn:
    model       = ColumnContent("model",       "markdown", True)
    revision    = ColumnContent("revision",    "str",      True)
    private     = ColumnContent("private",     "bool",     True)
    precision   = ColumnContent("precision",   "str",      True)
    weight_type = ColumnContent("weight_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):
    PT      = ModelDetails(name="pretrained",        symbol="🟢")
    FT      = ModelDetails(name="fine-tuned",        symbol="🔶")
    IFT     = ModelDetails(name="instruction-tuned", symbol="â­•")
    RL      = ModelDetails(name="RL-tuned",          symbol="🟦")
    Unknown = ModelDetails(name="",                  symbol="?")

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

    @staticmethod
    def from_str(type):
        if "fine-tuned"        in type or "🔶" in type: return ModelType.FT
        if "pretrained"        in type or "🟢" in type: return ModelType.PT
        if "RL-tuned"          in type or "🟦" in type: return ModelType.RL
        if "instruction-tuned" in type or "â­•" in type: return ModelType.IFT
        return ModelType.Unknown


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


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

    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]