const std = @import("std");
const pkg = @import("build.zig.zon");

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

    const git = b.option(bool, "git", "Enable git support") orelse true;
    const explain = b.option(bool, "explain", "Explain what the emojitcon means") orelse true;
    const perf = b.option(bool, "perf", "Monitor performance of functions") orelse false;
    const err = b.option(bool, "err", "Print errors") orelse false;
    const dynamic = b.option(bool, "dynamic", "Link XD dynamically") orelse false;
    const cleanup = b.option(bool, "cleanup", "removes the old XDhash file from your git directories") orelse false;

    const options = b.addOptions();
    options.addOption(bool, "git", git);
    options.addOption(bool, "explain", explain);
    options.addOption(bool, "perf", perf);
    options.addOption(bool, "err", err);
    options.addOption(bool, "dynamic", dynamic);
    options.addOption(bool, "cleanup", cleanup);
    options.addOption([]const u8, "version", pkg.version);

    var mod = b.addModule("XD", .{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });
    const exe = b.addExecutable(.{ .name = "XD", .root_module = mod });
    b.installArtifact(exe);

    // add our buildtime options as a module called config
    exe.root_module.addOptions("config", options);

    if (git) {
        if (dynamic) {
            exe.root_module.linkSystemLibrary("git2", .{});
            mod.link_libc = true;
        } else {
            // not sure if there's an easier way to do this, there's a type in
            // the libgit2 bindings build.zig but I'm not sure how to access it
            const libgit2_dep = if (optimize == .Debug) b.dependency("libgit2", .{
                    .target = target,
                    .optimize = optimize,
                    .@"enable-ssh" = false,
                    .@"tls-backend" = .mbedtls, // openssl doesn't work in debug mode
            }) else b.dependency("libgit2", .{
                    .target = target,
                    .optimize = optimize,
                    .@"enable-ssh" = false,
                    .@"tls-backend" = .openssl, // much much faster than mbedtls
            });
            exe.linkLibrary(libgit2_dep.artifact("git2"));
        }
    }

    const run_step = b.step("run", "Run the app");
    const run_cmd = b.addRunArtifact(exe);
    run_step.dependOn(&run_cmd.step);
    run_cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args| run_cmd.addArgs(args);

    const tests = b.addTest(.{ .root_module = mod });
    const test_step = b.step("test", "Run tests");
    const test_cmd = b.addRunArtifact(tests);
    test_step.dependOn(&test_cmd.step);
}