"""
Sanitizer Effectiveness Analyzer - Validate Security Controls.

[FUTURE_FEATURE] v3.3.0 - Automated sanitizer effectiveness checking

Analyzes whether sanitizers actually prevent vulnerabilities:
- Incomplete sanitization (e.g., only escaping single quotes)
- Context mismatch (HTML escaping used for SQL)
- Bypassable sanitizers (blacklist instead of whitelist)
- Missing edge cases (Unicode normalization, encoding tricks)

Example:
    >>> from code_scalpel.security.sanitization.sanitizer_analyzer import SanitizerAnalyzer
    >>> analyzer = SanitizerAnalyzer()
    >>> effectiveness = analyzer.check_sanitizer(
    ...     sanitizer_code="input.replace(\"'\", \"\\\\'\"))",
    ...     sink_type="SQL_QUERY"
    ... )
    >>> if effectiveness.score < 0.5:
    ...     print(f"Weak sanitizer: {effectiveness.bypasses}")
"""

from dataclasses import dataclass
from enum import Enum


class SanitizerType(Enum):
    """Types of sanitizers."""

    HTML_ESCAPE = "html"
    SQL_PARAMETERIZE = "sql"
    SHELL_QUOTE = "shell"
    URL_ENCODE = "url"
    JSON_ENCODE = "json"
    REGEX_ESCAPE = "regex"
    UNKNOWN = "unknown"


@dataclass
class BypassTechnique:
    """A technique that bypasses a sanitizer."""

    name: str
    payload: str
    description: str
    cve_reference: str | None = None


@dataclass
class SanitizerEffectiveness:
    """Analysis of sanitizer effectiveness."""

    score: float  # 0.0-1.0 (1.0 = fully effective)
    sanitizer_type: SanitizerType
    correct_context: bool
    bypasses: list[BypassTechnique]
    recommendations: list[str]
    is_sufficient: bool


class SanitizerAnalyzer:
    """
    Sanitizer effectiveness analyzer (stub).

    """

    def __init__(self):
        """
        - Load known XSS bypasses
        - Load SQL injection bypasses
        - Load path traversal bypasses
        - Setup symbolic executor for testing
        """
        self.bypass_database: list[BypassTechnique] = []

    def check_sanitizer(
        self, sanitizer_code: str, sink_type: str, context: str | None = None
    ) -> SanitizerEffectiveness:
        """
        - Parse sanitizer code
        - Classify sanitizer type
        - Test against bypass techniques
        - Score effectiveness
        - Generate recommendations
        """
        raise NotImplementedError("Sanitizer checking not yet implemented")

    def generate_bypasses(self, sanitizer_code: str) -> list[str]:
        """
        - Use symbolic execution
        - Use fuzzing techniques
        - Use known bypass patterns
        """
        raise NotImplementedError("Bypass generation not yet implemented")

    def suggest_fix(self, ineffective_sanitizer: str, sink_type: str) -> str:
        """
        - Recommend parameterized queries for SQL
        - Suggest proper escaping library
        - Provide code example
        """
        raise NotImplementedError("Fix suggestion not yet implemented")
