"""Evidence-specific projection into persisted session artifacts."""

from pathlib import Path
from typing import TYPE_CHECKING

from tht.evidence.corpus.store import CorpusStore
from tht.evidence.search import resolve_citation

if TYPE_CHECKING:
    from tht.decisions import DecisionRecord
    from tht.session.models import SchemaLinking


def _resolve_session_citation(evidence_root: Path, evidence_id: str) -> str:
    # New deployments resolve only immutable materialized files from ACTIVE. Keep the
    # curated-tree fallback for sessions created before a canonical corpus exists.
    corpus_root = evidence_root.parent.parent / "corpus"
    if corpus_root.exists():
        return resolve_citation(
            CorpusStore(corpus_root),
            evidence_id,
            materialized_root=evidence_root.parent / ".materialized-evidence",
        )
    for match in evidence_root.rglob(f"{evidence_id}.md"):
        return str(match)
    return ""


def project_session(
    decisions: list["DecisionRecord"],
    linking: "SchemaLinking",
    evidence_root: Path,
) -> list[dict]:
    """Project cited and reviewed Evidence into the session artifact shape."""
    entries: dict[str, dict] = {}
    for candidate in linking.candidates:
        for evidence_id in candidate.evidence:
            entries.setdefault(
                evidence_id,
                {
                    "id": evidence_id,
                    "file": _resolve_session_citation(evidence_root, evidence_id),
                    "esito": "usata",
                    "decision_seq": candidate.decision_seq,
                },
            )
    for decision in decisions:
        if decision.type not in ("evidence_accepted", "evidence_rejected"):
            continue
        entries[decision.subject] = {
            "id": decision.subject,
            "file": _resolve_session_citation(evidence_root, decision.subject),
            "esito": "accettata" if decision.type == "evidence_accepted" else "scartata",
            "decision_seq": decision.seq,
        }
    return list(entries.values())


__all__ = ["project_session"]