const std = @import("std");

pub fn build(b: *std.Build) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const rgbds = b.dependency("rgbds", .{
        .target = target,
        .optimize = optimize,
    });

    const convert_tiles = b.addRunArtifact(rgbds.artifact("rgbgfx"));
    convert_tiles.addArg("-u");
    convert_tiles.addFileArg(.{ .path = "tilemap.png" });
    convert_tiles.addArg("-o");
    const tileset_bin = convert_tiles.addOutputFileArg("tileset.2bpp");
    convert_tiles.addArg("-t");
    const tileset_map = convert_tiles.addOutputFileArg("tileset.tilemap");

    const convert_sprites = b.addRunArtifact(rgbds.artifact("rgbgfx"));
    convert_sprites.addArg("-u");
    convert_sprites.addFileArg(.{ .path = "sprites.png" });
    convert_sprites.addArg("-o");
    const sprites_bin = convert_sprites.addOutputFileArg("sprites.2bpp");

    const assemble = b.addRunArtifact(rgbds.artifact("rgbasm"));
    assemble.addArg("-L");
    assemble.addArg("-o");
    const main_obj = assemble.addOutputFileArg("main.o");
    assemble.addFileArg(.{ .path = "main.asm" });

    assemble.addArg("--include");
    assemble.addDirectoryArg(tileset_bin.dirname());

    assemble.addArg("--include");
    assemble.addDirectoryArg(tileset_map.dirname());

    assemble.addArg("--include");
    assemble.addDirectoryArg(sprites_bin.dirname());

    const link = b.addRunArtifact(rgbds.artifact("rgblink"));
    link.addArg("-o");
    const rom = link.addOutputFileArg("3dp.gb");
    link.addFileArg(main_obj);

    const fix = b.addRunArtifact(rgbds.artifact("rgbfix"));
    fix.addArg("-v");
    fix.addArg("-p");
    fix.addArg("0xFF");
    fix.addFileArg(rom);

    const install_file = b.addInstallFile(rom, "3dp.gb");
    install_file.step.dependOn(&fix.step);

    const install = b.getInstallStep();
    install.dependOn(&install_file.step);
}