import pathlib

MAX_PLOT_POINTS = 100_000
COLORS = {
    "primary": "#6366f1",
    "secondary": "#8b5cf6",
    "accent": "#06b6d4",
    "dark": "#1e293b",
    "light": "#f8fafc",
    "text": "#334155",
    "muted": "#64748b",
    "success": "#10b981",
    "warning": "#f59e0b",
    "error": "#ef4444",
    "purple": "#8b5cf6",
    "magenta": "#d946ef",
}


def decimate(x, max_points=MAX_PLOT_POINTS):
    if len(x) <= max_points:
        return x
    step = len(x) // max_points
    return x[::step]


def extract_metadata_fields(metadata):
    sample_rate = next((v for k, v in metadata.items() if "sample_rate" in k), 1)
    center_freq = next((v for k, v in metadata.items() if "center_freq" in k), 0)
    sdr = next((v for k, v in metadata.items() if "sdr" in k), "Unknown")
    return sample_rate, center_freq, sdr


def set_path(output_path):
    path = pathlib.Path(output_path)
    
    # If only filename provided (no directory), use default 'images' folder
    if len(path.parts) == 1:
        folder = pathlib.Path("images")
        file = path.name
    else:
        folder = path.parent
        file = path.name

    split_file = file.split(".")
    if len(split_file) == 2:
        extension = split_file[1]
    else:
        extension = "no extension"
    if extension != "png" and extension != "svg":
        print(f"{extension} not supported, saving as .png.")
        extension = "png"
        file = file + ".png"

    folder.mkdir(parents=True, exist_ok=True)
    return str(folder / file), extension