"""
NaraMotion Example 06: Composition and Blending Modes
"""

import os
from naramotion import Image, Context, Format, CompOp, Font

def get_font():
    for p in ["C:\\Windows\\Fonts\\segoeui.ttf", "C:\\Windows\\Fonts\\arial.ttf"]:
        if os.path.exists(p):
            return p
    return None

def main():
    width, height = 900, 600
    img = Image(width, height, Format.PRGB32)

    modes = [
        ("SrcOver", CompOp.SRC_OVER),
        ("Difference", CompOp.DIFFERENCE),
        ("Multiply", CompOp.MULTIPLY),
        ("Screen", CompOp.SCREEN),
        ("Overlay", CompOp.OVERLAY),
        ("Xor", CompOp.XOR),
    ]

    with Context(img) as ctx:
        ctx.fill_all("#18181B")

        font_path = get_font()
        font = Font.from_file(font_path, 18.0) if font_path else None

        cols = 3
        cell_w, cell_h = 280, 260
        margin_x, margin_y = 30, 20

        for idx, (name, op) in enumerate(modes):
            r = idx // cols
            c = idx % cols
            ox = margin_x + c * cell_w
            oy = margin_y + r * cell_h

            # Label
            if font:
                ctx.fill_text(ox + 20, oy + 30, font, name, "#E4E4E7")

            # Draw overlapping blending circles
            with ctx.push_state():
                ctx.comp_op = op
                ctx.fill_circle(ox + 80, oy + 120, 50, "#EF4444CC")
                ctx.fill_circle(ox + 130, oy + 120, 50, "#10B981CC")
                ctx.fill_circle(ox + 105, oy + 170, 50, "#3B82F6CC")

    os.makedirs("output", exist_ok=True)
    out_file = "output/06_composite_ops.png"
    img.write_to_file(out_file)
    print(f"Saved: {out_file}")

if __name__ == "__main__":
    main()