"""``GET /sessions/{id}`` snapshot — the frontend's only fact source before SSE."""

from __future__ import annotations

from pydantic import BaseModel, ConfigDict, Field

from app.report_collaboration.contracts.agent_runs import AgentRun
from app.report_collaboration.contracts.commands import CollaborationCommand
from app.report_collaboration.contracts.messages import CollaborationMessage
from app.report_collaboration.contracts.nodes import CollaborationNodeState
from app.report_collaboration.contracts.plans import ReportPlanCandidate
from app.report_collaboration.contracts.reports import ReportVersion
from app.report_collaboration.contracts.runs import ReportRun, ReportSession


class SessionSnapshot(BaseModel):
    model_config = ConfigDict(extra="forbid")

    session: ReportSession
    messages: list[CollaborationMessage] = Field(default_factory=list)
    plans: list[ReportPlanCandidate] = Field(default_factory=list)
    run: ReportRun | None = None
    nodes: list[CollaborationNodeState] = Field(default_factory=list)
    agent_runs: list[AgentRun] = Field(default_factory=list)
    commands: list[CollaborationCommand] = Field(default_factory=list)
    report_versions: list[ReportVersion] = Field(default_factory=list)
    last_seq: int = 0