"""Deterministic who/where/when queries over the structured timeline."""

from __future__ import annotations

from ..models import Timeline, TimelineSlice


class TimelineIndex:
    def __init__(self, timeline: Timeline) -> None:
        self.timeline = timeline

    def where(self, character: str, time_slice: str) -> list[TimelineSlice]:
        return [
            s
            for s in self.timeline.slices
            if s.character.lower() == character.lower()
            and s.time_slice == time_slice
        ]

    def who_was_in(self, location: str, time_slice: str) -> list[str]:
        return [
            s.character
            for s in self.timeline.slices
            if s.location.lower() == location.lower()
            and s.time_slice == time_slice
        ]

    def witnessed_by(self, character: str) -> list[TimelineSlice]:
        """Slices this character observed (present at, or named in observed_by)."""
        out: list[TimelineSlice] = []
        for s in self.timeline.slices:
            if s.character.lower() == character.lower() or any(
                o.lower() == character.lower() for o in s.observed_by
            ):
                out.append(s)
        return out

    def slices_for(self, character: str) -> list[TimelineSlice]:
        return self.timeline.for_character(character)