"""
Data models for solution and project management.
"""

from dataclasses import dataclass, field
from pathlib import Path
from typing import Optional


@dataclass
class CsprojProject:
    """Represents a .csproj project file."""

    path: Path  # Absolute path to .csproj file
    name: str  # Project name (without extension)
    guid: str  # Project GUID (generated deterministically from path)
    project_references: list[Path] = field(default_factory=list)  # Resolved absolute paths
    package_references: dict[str, str] = field(default_factory=dict)  # Package name -> version

    def __hash__(self) -> int:
        return hash(self.path)

    def __eq__(self, other: object) -> bool:
        if not isinstance(other, CsprojProject):
            return False
        return self.path == other.path


@dataclass
class SolutionFolder:
    """Represents a solution folder in a .sln file."""

    name: str  # Folder display name
    guid: str  # Folder GUID
    path: str  # Full path within solution (e.g., "Module/__Libraries")
    parent_guid: Optional[str] = None  # Parent folder GUID (None for root folders)
    children: list["SolutionFolder"] = field(default_factory=list)
    projects: list[CsprojProject] = field(default_factory=list)

    def __hash__(self) -> int:
        return hash(self.path)

    def __eq__(self, other: object) -> bool:
        if not isinstance(other, SolutionFolder):
            return False
        return self.path == other.path


@dataclass
class PackageUsage:
    """Tracks usage of a NuGet package across the codebase."""

    package_name: str
    usages: dict[Path, str] = field(default_factory=dict)  # csproj path -> version string

    def get_all_versions(self) -> list[str]:
        """Get list of unique versions used."""
        return list(set(self.usages.values()))

    def get_usage_count(self) -> int:
        """Get number of projects using this package."""
        return len(self.usages)


@dataclass
class NormalizationChange:
    """Represents a version change for a package in a project."""

    csproj_path: Path
    old_version: str
    new_version: str


@dataclass
class NormalizationResult:
    """Result of normalizing a package across the codebase."""

    package_name: str
    target_version: str
    changes: list[NormalizationChange] = field(default_factory=list)
    skipped_reason: Optional[str] = None


# Constants for solution file format
CSHARP_PROJECT_TYPE_GUID = "FAE04EC0-301F-11D3-BF4B-00C04F79EFBC"
SOLUTION_FOLDER_TYPE_GUID = "2150E333-8FDC-42A3-9474-1A3956D46DE8"
BYPASS_MARKER = "# STELLAOPS-MANUAL-SOLUTION"