"""Tests for Image Input Pipeline (F05)."""

import asyncio

import cv2
import numpy as np
import pytest

from gps_denied.core.pipeline import ImageInputPipeline, QueueFullError, ValidationError
from gps_denied.schemas.image import ImageBatch


@pytest.fixture
def pipeline(tmp_path):
    storage = str(tmp_path / "images")
    return ImageInputPipeline(storage_dir=storage, max_queue_size=2)


def test_batch_validation(pipeline):
    # Too few images
    b1 = ImageBatch(images=[b"1", b"2"], filenames=["1.jpg", "2.jpg"], start_sequence=1, end_sequence=2, batch_number=1)
    val = pipeline.validate_batch(b1)
    assert not val.valid
    assert "Batch is empty" in val.errors

    # Let's mock a valid batch of 10 images
    fake_imgs = [b"fake"] * 10
    fake_names = [f"AD{i:06d}.jpg" for i in range(1, 11)]
    b2 = ImageBatch(images=fake_imgs, filenames=fake_names, start_sequence=1, end_sequence=10, batch_number=1)
    val2 = pipeline.validate_batch(b2)
    assert val2.valid


@pytest.mark.asyncio
async def test_queue_and_process(pipeline):
    flight_id = "test_f1"
    
    # Create valid fake images
    fake_img_np = np.zeros((10, 10, 3), dtype=np.uint8)
    _, encoded = cv2.imencode(".jpg", fake_img_np)
    fake_bytes = encoded.tobytes()
    
    fake_imgs = [fake_bytes] * 10
    fake_names = [f"AD{i:06d}.jpg" for i in range(1, 11)]
    b = ImageBatch(images=fake_imgs, filenames=fake_names, start_sequence=1, end_sequence=10, batch_number=1)
    
    pipeline.queue_batch(flight_id, b)
    
    # Process
    processed = await pipeline.process_next_batch(flight_id)
    assert processed is not None
    assert len(processed.images) == 10
    assert processed.images[0].sequence == 1
    assert processed.images[-1].sequence == 10
    
    # Status
    st = pipeline.get_processing_status(flight_id)
    assert st.total_images == 10
    assert st.processed_images == 10
    
    # Sequential get
    next_img = pipeline.get_next_image(flight_id)
    assert next_img is not None
    assert next_img.sequence == 1
    
    # Second get
    next_img2 = pipeline.get_next_image(flight_id)
    assert next_img2 is not None
    assert next_img2.sequence == 2


def test_queue_full(pipeline):
    flight_id = "test_full"
    fake_imgs = [b"fake"] * 10
    fake_names = [f"AD{i:06d}.jpg" for i in range(1, 11)]
    b = ImageBatch(images=fake_imgs, filenames=fake_names, start_sequence=1, end_sequence=10, batch_number=1)
    
    pipeline.queue_batch(flight_id, b)
    pipeline.queue_batch(flight_id, b)
    
    with pytest.raises(QueueFullError):
        pipeline.queue_batch(flight_id, b)