from pydantic import BaseModel, model_validator, field_validator
from typing import List, Optional, Any


class Bug(BaseModel):
    description: str
    file: str = "unknown"
    line: Optional[int] = None
    severity: str = "critical"

    @field_validator("file", mode="before")
    @classmethod
    def coerce_file(cls, v: Any) -> str:
        if isinstance(v, list):
            return ", ".join(str(f) for f in v) if v else "unknown"
        return v or "unknown"


class Warning(BaseModel):
    description: str
    file: str = "unknown"
    line: Optional[int] = None

    @field_validator("file", mode="before")
    @classmethod
    def coerce_file(cls, v: Any) -> str:
        if isinstance(v, list):
            return ", ".join(str(f) for f in v) if v else "unknown"
        return v or "unknown"


class Suggestion(BaseModel):
    description: str
    file: str = "unknown"

    @field_validator("file", mode="before")
    @classmethod
    def coerce_file(cls, v: Any) -> str:
        if isinstance(v, list):
            return ", ".join(str(f) for f in v) if v else "unknown"
        return v or "unknown"


class IssueReport(BaseModel):
    critical: List[Bug] = []
    warnings: List[Warning] = []
    suggestions: List[Suggestion] = []
    total_critical: int = 0
    total_warnings: int = 0
    total_suggestions: int = 0

    @model_validator(mode="after")
    def compute_totals(self) -> "IssueReport":
        self.total_critical = len(self.critical)
        self.total_warnings = len(self.warnings)
        self.total_suggestions = len(self.suggestions)
        return self