from typing import List, Dict, Tuple
from pydantic import BaseModel, Field, field_validator

class PaperInput(BaseModel):
    """Validated paper input schema"""
    paper_title: str = Field(..., min_length=5, max_length=500)
    paper_abstract: str = Field(..., min_length=50, max_length=5000)
    reviews: List[str] = Field(..., min_length=1, max_length=10)
    
    @field_validator('paper_title')
    @classmethod
    def validate_title(cls, v: str) -> str:
        """Validate paper title"""
        if not v or not v.strip():
            raise ValueError("Paper title cannot be empty")
        return v.strip()
    
    @field_validator('paper_abstract')
    @classmethod
    def validate_abstract(cls, v: str) -> str:
        """Validate paper abstract"""
        if not v or not v.strip():
            raise ValueError("Paper abstract cannot be empty")
        if len(v.strip()) < 50:
            raise ValueError("Paper abstract must be at least 50 characters")
        return v.strip()
    
    @field_validator('reviews')
    @classmethod
    def validate_reviews(cls, v: List[str]) -> List[str]:
        """Validate reviews"""
        if not v:
            raise ValueError("At least one review is required")
        
        valid_reviews = []
        for i, review in enumerate(v):
            if not isinstance(review, str):
                raise ValueError(f"Review {i} must be a string")
            
            cleaned = review.strip()
            if len(cleaned) < 50:
                raise ValueError(f"Review {i} must be at least 50 characters")
            
            valid_reviews.append(cleaned)
        
        return valid_reviews

class CritiqueInput(BaseModel):
    """Validated critique input schema"""
    reviews: List[str] = Field(..., min_length=1, max_length=10)
    
    @field_validator('reviews')
    @classmethod
    def validate_reviews(cls, v: List[str]) -> List[str]:
        """Validate reviews"""
        if not v:
            raise ValueError("At least one review is required")
        
        valid_reviews = []
        for review in v:
            if isinstance(review, str) and len(review.strip()) >= 50:
                valid_reviews.append(review.strip())
        
        if not valid_reviews:
            raise ValueError("No valid reviews found (must be at least 50 characters)")
        
        return valid_reviews

class DisagreementInput(BaseModel):
    """Validated disagreement detection input schema"""
    critiques: List[Dict] = Field(..., min_length=2)
    
    @field_validator('critiques')
    @classmethod
    def validate_critiques(cls, v: List[Dict]) -> List[Dict]:
        """Validate critique structure"""
        if len(v) < 2:
            raise ValueError("At least 2 critiques required for disagreement detection")
        
        required_keys = {'Methodology', 'Experiments', 'Clarity', 'Significance', 'Novelty'}
        
        for i, critique in enumerate(v):
            if not isinstance(critique, dict):
                raise ValueError(f"Critique {i} must be a dictionary")
            
            # Check if critique has the expected structure
            if not any(key in critique for key in required_keys):
                raise ValueError(f"Critique {i} missing required categories")
        
        return v

class SearchInput(BaseModel):
    """Validated search input schema"""
    paper_title: str = Field(..., min_length=5, max_length=500)
    paper_abstract: str = Field(..., min_length=50, max_length=5000)
    critiques: List[Dict] = Field(..., min_length=1)
    
    @field_validator('paper_title')
    @classmethod
    def validate_title(cls, v: str) -> str:
        """Validate paper title"""
        if not v or not v.strip():
            raise ValueError("Paper title cannot be empty")
        return v.strip()
    
    @field_validator('paper_abstract')
    @classmethod
    def validate_abstract(cls, v: str) -> str:
        """Validate paper abstract"""
        if not v or not v.strip():
            raise ValueError("Paper abstract cannot be empty")
        return v.strip()

def validate_paper_input(
    paper_title: str,
    paper_abstract: str,
    reviews: List[str]
) -> Tuple[bool, str]:
    """
    Validate paper input data
    
    Args:
        paper_title: Paper title
        paper_abstract: Paper abstract
        reviews: List of review texts
    
    Returns:
        Tuple of (is_valid, error_message)
    """
    try:
        PaperInput(
            paper_title=paper_title,
            paper_abstract=paper_abstract,
            reviews=reviews
        )
        return True, ""
    except Exception as e:
        return False, str(e)

def validate_critique_input(reviews: List[str]) -> Tuple[bool, str]:
    """
    Validate critique extraction input
    
    Args:
        reviews: List of review texts
    
    Returns:
        Tuple of (is_valid, error_message)
    """
    try:
        CritiqueInput(reviews=reviews)
        return True, ""
    except Exception as e:
        return False, str(e)

def validate_disagreement_input(critiques: List[Dict]) -> Tuple[bool, str]:
    """
    Validate disagreement detection input
    
    Args:
        critiques: List of critique dictionaries
    
    Returns:
        Tuple of (is_valid, error_message)
    """
    try:
        DisagreementInput(critiques=critiques)
        return True, ""
    except Exception as e:
        return False, str(e)

def validate_search_input(
    paper_title: str,
    paper_abstract: str,
    critiques: List[Dict]
) -> Tuple[bool, str]:
    """
    Validate search input
    
    Args:
        paper_title: Paper title
        paper_abstract: Paper abstract
        critiques: List of critique dictionaries
    
    Returns:
        Tuple of (is_valid, error_message)
    """
    try:
        SearchInput(
            paper_title=paper_title,
            paper_abstract=paper_abstract,
            critiques=critiques
        )
        return True, ""
    except Exception as e:
        return False, str(e)