const std = @import("std");
const builtin = @import("builtin");

fn check_version() void {
    const required_zig_version = "0.16.0";
    const current_zig_version = builtin.zig_version_string;
    if (std.SemanticVersion.order(try std.SemanticVersion.parse(required_zig_version), try std.SemanticVersion.parse(current_zig_version)) == .gt) {
        @compileError("punkres requires zig version: " ++ required_zig_version ++ " to build. Your zig version is: " ++ current_zig_version);
    }
}
comptime {
    check_version();
}

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

    const exe_mod = b.createModule(.{
        .root_source_file = b.path("./src/punkres.zig"),
        .target = target,
        .optimize = mode,
    });
    const exe = b.addExecutable(.{
        .name = "punkres",
        .root_module = exe_mod,
    });

    const install_exe = b.addInstallArtifact(exe, .{});
    b.getInstallStep().dependOn(&install_exe.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 punkres");
    run_step.dependOn(&run_cmd.step);

    const test_names = [_][]const u8{ "pe", "rsrc", "ico", "overlay", "punkres" };
    const test_step = b.step("test", "Run punkres tests");
    test_step.dependOn(b.getInstallStep());
    inline for (test_names) |tn| {
        const mod = b.createModule(.{
            .root_source_file = b.path("./src/" ++ tn ++ "_test.zig"),
            .target = target,
            .optimize = mode,
        });
        const t = b.addTest(.{
            .name = "test_" ++ tn,
            .root_module = mod,
        });
        const run_t = b.addRunArtifact(t);
        //the CLI suite drives the installed binary from zig-out/bin - the run
        //itself must wait for install (a step's own install dependency does
        //NOT order sibling runs; punkzip build-graph race, 2026-07-27)
        if (std.mem.eql(u8, tn, "punkres")) {
            run_t.step.dependOn(b.getInstallStep());
        }
        test_step.dependOn(&t.step);
        test_step.dependOn(&run_t.step);
    }
}