// Build recipe
// Copyright (C) 2021-2022  Nguyễn Gia Phong
//
// This file is part of Black Shades.
//
// Black Shades is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Black Shades is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Black Shades.  If not, see <https://www.gnu.org/licenses/>.

const std = @import("std");
const InstallDirectoryOptions = std.build.InstallDirectoryOptions;
const Builder = std.build.Builder;

const data = InstallDirectoryOptions{
    .source_dir = "data",
    .install_dir = .{ .custom = "share" },
    .install_subdir = "blackshades",
};

pub fn build(b: *Builder) void {
    b.installDirectory(data);
    const options = b.addOptions();
    const data_dir = b.getInstallPath(data.install_dir, data.install_subdir);
    options.addOption([]const u8, "data_dir", data_dir);

    const exe = b.addExecutable("blackshades", "src/main.zig");
    exe.addIncludeDir("src");

    const cxxflags = [_][]const u8{ "--std=c++17" };
    exe.addCSourceFile("src/Decals.cpp", &cxxflags);
    exe.addCSourceFile("src/Fog.cpp", &cxxflags);
    exe.addCSourceFile("src/Frustum.cpp", &cxxflags);
    exe.addCSourceFile("src/GameDraw.cpp", &cxxflags);
    exe.addCSourceFile("src/GameInitDispose.cpp", &cxxflags);
    exe.addCSourceFile("src/GameLoop.cpp", &cxxflags);
    exe.addCSourceFile("src/GameTick.cpp", &cxxflags);
    exe.addCSourceFile("src/Globals.cpp", &cxxflags);
    exe.addCSourceFile("src/Models.cpp", &cxxflags);
    exe.addCSourceFile("src/Person.cpp", &cxxflags);
    exe.addCSourceFile("src/Quaternions.cpp", &cxxflags);
    exe.addCSourceFile("src/Skeleton.cpp", &cxxflags);
    exe.addCSourceFile("src/Sprites.cpp", &cxxflags);
    exe.addCSourceFile("src/Text.cpp", &cxxflags);

    exe.addCSourceFile("lib/lodepng/lodepng.c", &.{ "-ansi", "-pedantic" });
    exe.addIncludeDir("lib/lodepng");
    exe.addPackagePath("gfz", "lib/gfz/src/gfz.zig");
    @import("lib/gfz/build.zig").link(exe);
    exe.addPackagePath("ini", "lib/ini/src/ini.zig");
    exe.addPackagePath("loca", "lib/loca/src/main.zig");
    exe.addPackagePath("zeal", "lib/zeal/src/zeal.zig");
    @import("lib/zeal/build.zig").link(exe);

    exe.linkSystemLibrary("GL");
    exe.linkSystemLibrary("GLU");
    exe.linkSystemLibrary("c++");

    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    exe.setTarget(b.standardTargetOptions(.{}));

    // Standard release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    exe.setBuildMode(b.standardReleaseOptions());
    exe.addOptions("build_options", options);
    exe.install();

    const run_cmd = exe.run();
    run_cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args|
        run_cmd.addArgs(args);

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);
}