module builder

import os
import v.pref

fn test_parse_existing_ico_file() {
    icon_path := os.join_path(@VEXEROOT, 'cmd', 'tools', 'vdoc', 'theme', 'favicons', 'favicon.ico')
    images := parse_ico_file(icon_path)!
    assert images.len > 0
    for image in images {
        assert image.image_data.len > 0
    }
}

fn test_png_to_ico_bytes_roundtrip() {
    png_path := os.join_path(@VEXEROOT, 'examples', 'assets', 'logo.png')
    png_bytes := os.read_bytes(png_path)!
    ico_bytes := png_to_ico_bytes(png_bytes)!
    images := parse_ico_bytes(ico_bytes)!
    assert images.len == 1
    assert images[0].bytes_in_res == png_bytes.len
    assert images[0].image_data == png_bytes
}

fn test_png_dimensions_reads_valid_png() {
    png_path := os.join_path(@VEXEROOT, 'examples', 'assets', 'logo.png')
    size := png_dimensions(os.read_bytes(png_path)!)!
    assert size.width > 0
    assert size.height > 0
    assert size.width <= max_windows_icon_dimension
    assert size.height <= max_windows_icon_dimension
}

fn test_parse_ico_bytes_rejects_invalid_data() {
    if _ := parse_ico_bytes([]u8{}) {
        assert false
    } else {
        assert err.msg().contains('invalid icon file')
    }
}

fn test_windows_icon_flag_parsing() {
    target := os.join_path(@VEXEROOT, 'examples', 'hello_world.v')
    icon := os.join_path(@VEXEROOT, 'cmd', 'tools', 'vdoc', 'theme', 'favicons', 'favicon.ico')
    prefs, _ := pref.parse_args_and_show_errors([], ['', '-os', 'windows', '-icon', icon, target],
        false)
    assert prefs.icon_path == os.real_path(icon)
    assert prefs.build_options.contains('-icon "${os.real_path(icon)}"')
}

fn test_windows_icon_flag_parsing_with_inline_aliases() {
    target := os.join_path(@VEXEROOT, 'examples', 'hello_world.v')
    icon := os.join_path(@VEXEROOT, 'examples', 'assets', 'logo.png')
    for arg in ['-icon=${icon}', '--icon=${icon}', '-seticon=${icon}', '--seticon=${icon}'] {
        prefs, _ := pref.parse_args_and_show_errors([], ['', '-os', 'windows', arg, target], false)
        assert prefs.icon_path == os.real_path(icon)
        assert prefs.build_options.contains('-icon "${os.real_path(icon)}"')
    }
}