from backend.models.case import NPC, CaseFile, ClueState


def build_authorized_context(npc: NPC, case: CaseFile) -> list[str]:
    """Returns the facts the NPC is allowed to reference this turn."""
    ctx: list[str] = list(npc.authorized_reveals.always)

    if npc.emotional_state.anxiety > 50:
        ctx.extend(npc.authorized_reveals.anxiety_gt_50)
    if npc.emotional_state.anxiety > 75:
        ctx.extend(npc.authorized_reveals.anxiety_gt_75)

    discovered_ids = {c.id for c in case.clues if c.state != ClueState.hidden}
    for clue_id, reveals in npc.authorized_reveals.clue_found.items():
        if clue_id in discovered_ids:
            ctx.extend(reveals)

    return ctx