const std = @import("std");

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

    const exe = b.addExecutable(.{
        .name = "wrldbox",
        .root_module = b.createModule(.{
            .target = target,
            .optimize = optimize,
        }),
    });

    // C Source files
    exe.root_module.addCSourceFiles(.{
        .files = &.{
            "src/main.c",
            "src/world.c",
            "src/player.c",
            "src/physics.c",
            "src/render.c",
            "src/collision.c",
        },
        .flags = &.{ "-O2", "-Wall" },
    });

    // Raylib source files (rutils.c removed as it's part of rcore.c now)
    exe.root_module.addCSourceFiles(.{
        .files = &.{
            "raylib_src/src/rcore.c",
            "raylib_src/src/rshapes.c",
            "raylib_src/src/rtextures.c",
            "raylib_src/src/rtext.c",
            "raylib_src/src/rmodels.c",
            "raylib_src/src/raudio.c",
            "raylib_src/src/rglfw.c",
        },
        .flags = &.{ "-O2", "-Wall" },
    });

    // Header include paths
    exe.root_module.addIncludePath(b.path("include"));
    exe.root_module.addIncludePath(b.path("raylib_src/src"));
    exe.root_module.addIncludePath(b.path("raylib_src/src/external/glfw/include"));

    // Platform-specific configuration
    const t = target.result;
    if (t.os.tag == .linux) {
        exe.root_module.addCMacro("_GNU_SOURCE", "");
        exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
        exe.root_module.addCMacro("_GLFW_X11", "");
        
        exe.root_module.linkSystemLibrary("dl", .{});
        exe.root_module.linkSystemLibrary("rt", .{});
        exe.root_module.linkSystemLibrary("m", .{});
        exe.root_module.linkSystemLibrary("pthread", .{});
    } else if (t.os.tag == .windows) {
        exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
        exe.root_module.addCMacro("_GLFW_WIN32", "");
        
        exe.root_module.linkSystemLibrary("opengl32", .{});
        exe.root_module.linkSystemLibrary("gdi32", .{});
        exe.root_module.linkSystemLibrary("winmm", .{});
        exe.root_module.linkSystemLibrary("user32", .{});
        exe.root_module.linkSystemLibrary("shell32", .{});
    } else if (t.os.tag == .macos) {
        exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
        exe.root_module.addCMacro("_GLFW_COCOA", "");
        
        exe.root_module.linkFramework("OpenGL", .{});
        exe.root_module.linkFramework("Cocoa", .{});
        exe.root_module.linkFramework("IOKit", .{});
        exe.root_module.linkFramework("CoreVideo", .{});
    }

    // Explicitly link LibC using the 0.16.0 boolean field
    exe.root_module.link_libc = true;
    
    b.installArtifact(exe);

    // Standard run step
    const run_cmd = b.addRunArtifact(exe);
    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);
}