from __future__ import annotations

from typing import Any

from pydantic import BaseModel, Field, field_validator

from .models import ALLOWED_DIFFICULTIES, ALLOWED_PUZZLES


class CreateSessionRequest(BaseModel):
    player_name: str = Field(min_length=1, max_length=80)
    puzzle_type: str
    difficulty: str
    puzzle_id: str | None = Field(default=None, min_length=1)

    @field_validator("puzzle_type")
    @classmethod
    def validate_puzzle_type(cls, value: str) -> str:
        if value not in ALLOWED_PUZZLES:
            raise ValueError(f"Unsupported puzzle type: {value}")
        return value

    @field_validator("difficulty")
    @classmethod
    def validate_difficulty(cls, value: str) -> str:
        if value not in ALLOWED_DIFFICULTIES:
            raise ValueError(f"Unsupported difficulty: {value}")
        return value


class SubmitSessionRequest(BaseModel):
    board_ascii: str = Field(min_length=1)


class SessionPayload(BaseModel):
    problem_ascii: str
    current_board_ascii: str
    image_base64: str | None = None


class PuzzleOptionResponse(BaseModel):
    puzzle_id: str
    title: str
    sequence: int
    puzzle_type: str
    difficulty: str
    args: str


class SessionResponse(BaseModel):
    session_id: str
    engine: str
    puzzle_type: str
    difficulty: str
    puzzle_id: str
    args: str
    status: str
    started_at: str | None = None
    payload: SessionPayload


class SubmitResponse(BaseModel):
    solved: bool
    elapsed_ms: int | None
    status: str
    verification: dict[str, Any]


class LLMResultsResponse(BaseModel):
    puzzle_id: str
    models_solved: list[str]
    models_failed: list[str]


class LeaderboardEntry(BaseModel):
    player_name: str
    elapsed_ms: int | None
    submission_count: int
    solved: bool
    started_at: str | None
    submitted_at: str | None


class LeaderboardResponse(BaseModel):
    puzzle_id: str
    entries: list[LeaderboardEntry]