"""Tests for verdict parsing and per-frame evidence mapping."""

from __future__ import annotations

from video_analysis.buster_client import (
    build_frame_evidence,
    parse_verdict_and_explanation,
)


def test_parse_real():
    out = parse_verdict_and_explanation("REAL — no signs of manipulation.")
    assert out["verdict"] == "REAL"
    assert out["explanation"].startswith("REAL")


def test_parse_fake():
    assert parse_verdict_and_explanation("FAKE, visible artifacts")["verdict"] == "FAKE"


def test_parse_unclear_is_uncertain():
    # Anything that is not clearly REAL/FAKE maps to UNCERTAIN (offer enum).
    out = parse_verdict_and_explanation("Hard to tell, mixed signals.")
    assert out["verdict"] == "UNCERTAIN"


def test_parse_empty_is_uncertain():
    assert parse_verdict_and_explanation("")["verdict"] == "UNCERTAIN"


def test_build_frame_evidence_aligns_indices_and_timestamps():
    ev = build_frame_evidence([0, 30, 60], [0.0, 1.0, 2.0])
    assert ev == [
        {"frame_index": 0, "timestamp_s": 0.0},
        {"frame_index": 30, "timestamp_s": 1.0},
        {"frame_index": 60, "timestamp_s": 2.0},
    ]


def test_build_frame_evidence_handles_missing_timestamps():
    ev = build_frame_evidence([5, 10], [None])
    assert ev[0] == {"frame_index": 5, "timestamp_s": None}
    # Second frame has no timestamp entry → defaults to None.
    assert ev[1] == {"frame_index": 10, "timestamp_s": None}


def test_build_frame_evidence_empty():
    assert build_frame_evidence([], []) == []