Fix Resolution

@dataclass(frozen=True)
class FixVersion:
    """
    Represents an abstract dependency fix version.
    
    This class cannot be constructed directly.
    """
    
    dep: ResolvedDependency
    """
    The dependency that needs to be fixed.
    """
    
    def is_skipped(self) -> bool:
        """
        Check whether the FixVersion was unable to be resolved.
        
        Returns:
        True if this is a SkippedFixVersion, False otherwise
        """

@dataclass(frozen=True)
class ResolvedFixVersion(FixVersion):
    """
    Represents a dependency fix version that was successfully resolved.
    """
    
    version: Version
    """
    The resolved fix version to upgrade to.
    """

@dataclass(frozen=True)
class SkippedFixVersion(FixVersion):
    """
    Represents a dependency fix version that was unable to be resolved.
    """
    
    skip_reason: str
    """
    The reason why this fix version could not be resolved.
    """

class FixResolutionImpossible(Exception):
    """
    Raised when resolve_fix_versions fails to find a fix version without known vulnerabilities.
    """

def resolve_fix_versions(
    dependency_results: Iterator[tuple[Dependency, list[VulnerabilityResult]]],
    service: VulnerabilityService,
    state: AuditState = AuditState(),
) -> Iterator[FixVersion]:
    """
    Resolve fix versions for vulnerabilities.
    
    Takes dependency audit results and determines appropriate fix versions
    for each vulnerable dependency.
    
    Parameters:
    - dependency_results: Iterator of (dependency, vulnerabilities) tuples
    - service: VulnerabilityService to query for additional information
    - state: AuditState for progress tracking
    
    Returns:
    Iterator of FixVersion objects (either ResolvedFixVersion or SkippedFixVersion)
    """

from pip_audit._fix import resolve_fix_versions
from pip_audit._audit import Auditor
from pip_audit._dependency_source import PipSource
from pip_audit._service import PyPIService

# Perform audit and resolve fixes
service = PyPIService()
source = PipSource()
auditor = Auditor(service=service)

# Get audit results
audit_results = auditor.audit(source)

# Resolve fix versions
fix_versions = resolve_fix_versions(audit_results, service)

for fix_version in fix_versions:
    if fix_version.is_skipped():
        print(f"Cannot fix {fix_version.dep.name}: {fix_version.skip_reason}")
    else:
        print(f"Fix {fix_version.dep.name} v{fix_version.dep.version} -> v{fix_version.version}")

from pip_audit._fix import resolve_fix_versions
from pip_audit._audit import Auditor
from pip_audit._dependency_source import RequirementSource
from pip_audit._service import PyPIService

# Setup components
service = PyPIService()
source = RequirementSource("requirements.txt")
auditor = Auditor(service=service)

# Get vulnerabilities and resolve fixes
audit_results = list(auditor.audit(source))
vulnerable_results = [(dep, vulns) for dep, vulns in audit_results if vulns]

if vulnerable_results:
    print(f"Found {len(vulnerable_results)} packages with vulnerabilities")
    
    # Resolve fix versions
    fix_versions = list(resolve_fix_versions(iter(vulnerable_results), service))
    
    # Apply fixes
    for fix_version in fix_versions:
        if not fix_version.is_skipped():
            try:
                source.fix(fix_version)
                print(f"Fixed {fix_version.dep.name} -> v{fix_version.version}")
            except Exception as e:
                print(f"Failed to fix {fix_version.dep.name}: {e}")
        else:
            print(f"Skipped {fix_version.dep.name}: {fix_version.skip_reason}")

from pip_audit._fix import resolve_fix_versions
from pip_audit._audit import Auditor
from pip_audit._dependency_source import PyProjectSource
from pip_audit._service import OsvService
from pip_audit._state import AuditState

# Custom state handler for progress tracking
class ProgressTracker:
    def update_state(self, message: str, logs: str | None = None):
        print(f"Progress: {message}")
    
    def initialize(self):
        print("Starting fix resolution...")
    
    def finalize(self):
        print("Fix resolution completed.")

# Setup with state tracking
tracker = ProgressTracker()
state = AuditState(members=[tracker])

service = OsvService()
source = PyProjectSource("pyproject.toml")
auditor = Auditor(service=service)

# Perform audit with state tracking
state.initialize()
audit_results = auditor.audit(source)

# Resolve fixes with progress updates
fix_versions = resolve_fix_versions(audit_results, service, state=state)

resolved_count = 0
skipped_count = 0

for fix_version in fix_versions:
    if fix_version.is_skipped():
        skipped_count += 1
    else:
        resolved_count += 1

state.finalize()
print(f"Summary: {resolved_count} fixes resolved, {skipped_count} skipped")

from pip_audit._fix import resolve_fix_versions
from pip_audit._audit import Auditor
from pip_audit._dependency_source import PipSource
from pip_audit._service import PyPIService
from packaging.version import Version

def choose_best_fix_version(vulnerabilities, available_versions):
    """
    Custom logic to choose the best fix version from available options.
    """
    # Get all fix versions from vulnerabilities
    all_fix_versions = set()
    for vuln in vulnerabilities:
        all_fix_versions.update(vuln.fix_versions)
    
    # Filter to versions that fix all vulnerabilities
    valid_fixes = []
    for version in all_fix_versions:
        fixes_all = True
        for vuln in vulnerabilities:
            if version not in vuln.fix_versions:
                fixes_all = False
                break
        if fixes_all:
            valid_fixes.append(version)
    
    # Choose the minimum version that fixes all issues
    return min(valid_fixes) if valid_fixes else None

# Example usage
service = PyPIService()
source = PipSource()
auditor = Auditor(service=service)

# Get audit results and apply custom fix resolution
for dependency, vulnerabilities in auditor.audit(source):
    if vulnerabilities:
        # Use custom logic to determine best fix
        best_fix = choose_best_fix_version(vulnerabilities, [])
        if best_fix:
            print(f"Recommended fix for {dependency.name}: v{best_fix}")
        else:
            print(f"No suitable fix found for {dependency.name}")