#!/usr/bin/env python3
"""Example: Validate schema and timeline sanity for one row."""
from datasets import load_dataset

REPO = "skyzhou06/StreamingOmniDatasets"
REQUIRED_FIELDS = [
    "id", "dataset", "task_family", "source_dataset", "source_id",
    "split", "duration_sec", "modalities", "timeline", "evidence",
    "quality", "metadata",
]
TIMELINE_FIELDS = [
    "t_start", "t_end", "audio_ref", "frame_refs", "asr_delta",
    "ocr_delta", "audio_events", "visual_events", "control",
    "target_text_delta", "target_speech_ref",
]

def validate_row(sample, config_name):
    issues = []

    # Check top-level schema
    missing = [f for f in REQUIRED_FIELDS if f not in sample]
    if missing:
        issues.append(f"Missing schema fields: {missing}")

    # Check timeline
    timeline = sample.get("timeline", [])
    if not timeline:
        issues.append("timeline is empty")
    else:
        t0 = timeline[0]
        missing_tl = [f for f in TIMELINE_FIELDS if f not in t0]
        if missing_tl:
            issues.append(f"Missing timeline fields: {missing_tl}")

    # AVJointReasoning specific
    if config_name == "AVJointReasoning":
        if "question" not in sample:
            issues.append("Missing AVJointReasoning: question")
        if "answer" not in sample:
            issues.append("Missing AVJointReasoning: answer")

    # Timeline sanity
    for i, chunk in enumerate(timeline):
        t_start = chunk.get("t_start", 0)
        t_end = chunk.get("t_end", 0)
        if t_start > t_end:
            issues.append(f"Timeline chunk {i}: t_start > t_end")

    return issues

for config in ["StreamingAudioInteraction", "AVJointReasoning"]:
    print(f"\nValidating {config}...")
    try:
        ds = load_dataset(REPO, config, split="train", streaming=True)
        sample = next(iter(ds))
        issues = validate_row(sample, config)
        if issues:
            for issue in issues:
                print(f"  ISSUE: {issue}")
        else:
            print(f"  All checks passed for {sample.get('id')}")
    except Exception as e:
        print(f"  Loading failed: {e}")
        print("  Try parquet fallback as shown in load_streaming_omni_dataset.py")