"""
On-device test for the double_circle pattern using mpremote.

Usage (from pico/ dir or project root with adjusted paths):

    mpremote connect <device> cp src/*.py :
    mpremote connect <device> cp src/patterns/*.py :patterns
    mpremote connect <device> cp lib/*.py :
    mpremote connect <device> cp test/test_double_circle.py :
    mpremote connect <device> run test_double_circle.py

This script:
  - Instantiates Presets
  - Creates a few in-memory 'double_circle' presets with different centers, widths, and colors
  - Selects each one so you can visually confirm the symmetric bands and color gradients
"""

from presets import Presets, Preset


def make_double_circle_preset(
    name, center, half_width, colors, direction=0, step_size=1, brightness=255
):
    """
    Helper to build a Preset for the 'double_circle' pattern.

    center: logical index (0-based, on reference strip 0)
    half_width: number of LEDs each side of center
    colors: [color1, color2] where each color is (r,g,b)
    """
    cs = list(colors)[:2]
    while len(cs) < 2:
        cs.append((0, 0, 0))

    data = {
        "p": "double_circle",
        "c": cs,
        "b": brightness,
        "n1": center,
        "n2": half_width,
        "n3": direction,
        "n4": step_size,
    }
    return name, Preset(data)


def show_and_wait(presets, name, preset_obj, wait_ms):
    """Select a static double_circle preset and hold it for wait_ms."""
    presets.presets[name] = preset_obj
    presets.select(name)
    # DoubleCircle draws immediately in run(), then just yields; one tick is enough.
    presets.tick()

    import utime

    start = utime.ticks_ms()
    while utime.ticks_diff(utime.ticks_ms(), start) < wait_ms:
        presets.tick()


def main():
    presets = Presets()
    presets.load()

    num_leds = presets.strip_length(0)
    if num_leds <= 0:
        print("No strips; aborting double_circle test.")
        return

    print("Starting double_circle pattern test...")

    quarter = num_leds // 4
    half = num_leds // 2

    dc_presets = []

    # 1. Center at top (0), moderate width, color1 at center (n3=0)
    dc_presets.append(
        make_double_circle_preset(
            "dc_top_red_to_blue",
            center=0,
            half_width=quarter,
            colors=[(255, 0, 0), (0, 0, 255)],
            direction=0,
        )
    )

    # 2. Center at bottom (half), narrow band, color1 at endpoints (n3=1)
    dc_presets.append(
        make_double_circle_preset(
            "dc_bottom_green_to_purple",
            center=half,
            half_width=quarter // 2,
            colors=[(0, 255, 0), (128, 0, 128)],
            direction=1,
        )
    )

    # 3. Center at quarter, wide band, both directions for comparison
    dc_presets.append(
        make_double_circle_preset(
            "dc_quarter_white_to_cyan_inward",
            center=quarter,
            half_width=half,
            colors=[(255, 255, 255), (0, 255, 255)],
            direction=0,
        )
    )

    dc_presets.append(
        make_double_circle_preset(
            "dc_quarter_white_to_cyan_outward",
            center=quarter,
            half_width=half,
            colors=[(255, 255, 255), (0, 255, 255)],
            direction=1,
        )
    )

    # 4. Explicit test: n1 = 50, n2 = 40 (half of 80) inward
    dc_presets.append(
        make_double_circle_preset(
            "dc_n1_50_n2_40_inward",
            center=50,
            half_width=40,
            colors=[(255, 100, 0), (0, 0, 0)],
            direction=0,
        )
    )

    # 5. Explicit test: n1 = num_leds//2, n2 = num_leds//4 outward, stepping as fast as possible
    center_half = num_leds // 2
    radius_quarter = max(1, num_leds // 4)
    dc_presets.append(
        make_double_circle_preset(
            "dc_n1_half_n2_quarter_outward",
            center=center_half,
            half_width=radius_quarter,
            colors=[(0, 150, 255), (0, 0, 0)],
            direction=1,
            step_size=radius_quarter,  # jump to full radius in one step
        )
    )

    # Show each for ~4 seconds
    for name, preset_obj in dc_presets:
        print("Showing double_circle preset:", name)
        show_and_wait(presets, name, preset_obj, wait_ms=4000)

    print("Double_circle pattern test finished. Turning off LEDs.")
    presets.select("off")
    presets.tick()


if __name__ == "__main__":
    main()