"""Immutable generic project, node, edge, and context contracts."""

from __future__ import annotations

from dataclasses import asdict, dataclass
from pathlib import Path


@dataclass(frozen=True)
class Limits:
    max_source_bytes: int = 1_000_000
    max_nodes: int = 10_000
    max_query_chars: int = 500
    max_results: int = 100
    max_traversal_depth: int = 8
    max_context_tokens: int = 32_000
    max_tool_output_chars: int = 200_000


@dataclass(frozen=True)
class ContextProfile:
    profile_id: str
    families: tuple[str, ...]
    statuses: tuple[str, ...]
    required_nodes: tuple[str, ...]
    token_budget: int
    dependency_depth: int


@dataclass(frozen=True)
class ProjectDescriptor:
    schema_version: int
    project_id: str
    title: str
    adapter: str
    root: Path
    descriptor_path: Path
    descriptor_hash: str
    content_roots: tuple[Path, ...]
    authority_files: tuple[Path, ...]
    cache_root: Path
    index_path: Path
    allowed_relations: tuple[str, ...]
    profiles: tuple[ContextProfile, ...]
    limits: Limits


@dataclass(frozen=True)
class Node:
    node_id: str
    title: str
    family: str
    authority: str
    status: str
    tags: tuple[str, ...]
    summary: str
    content: str
    source_path: str
    source_anchor: str | None
    content_hash: str

    def as_dict(self, *, include_content: bool = True) -> dict[str, object]:
        result = asdict(self)
        if not include_content:
            result.pop("content")
        return result


@dataclass(frozen=True)
class Edge:
    source_id: str
    relation: str
    target_id: str

    def as_dict(self) -> dict[str, str]:
        return asdict(self)


@dataclass(frozen=True)
class ProjectSnapshot:
    descriptor: ProjectDescriptor
    nodes: tuple[Node, ...]
    edges: tuple[Edge, ...]
    source_hash: str
    revision: str


@dataclass(frozen=True)
class ContextEntry:
    node_id: str
    reason: str
    estimated_tokens: int
    source_path: str
    content_hash: str
    text: str

    def as_dict(self) -> dict[str, object]:
        return asdict(self)