const std = @import("std");

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

    const exe = b.addExecutable(.{
        .name = "zx",
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });

    b.installArtifact(exe);

    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);

    // Creates a step for unit testing. This only builds the test executable
    // but does not run it.
    const main_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });

    const run_main_tests = b.addRunArtifact(main_tests);

    const test_step = b.step("test", "Run library tests");
    test_step.dependOn(&run_main_tests.step);

    // // Setup comptime parsing for /lib files
    // var markup_files = std.ArrayList([]const u8).init(b.allocator);
    // var zig_files = std.ArrayList([]const u8).init(b.allocator);
    // defer markup_files.deinit();
    // defer zig_files.deinit();

    // var options = b.addOptions();

    // // Add all files names in the src folder to `files`
    // var iter_dir = try std.fs.cwd().openIterableDir("lib", .{});
    // var src_dir = try std.fs.cwd().openDir("src", .{});
    // var lib_walker = try iter_dir.walk(b.allocator);
    // var walking = true;
    // while (walking) blk: {
    //     var file = lib_walker.next() catch {
    //         walking = false;
    //         break :blk;
    //     };
    //     if (file == null) {
    //         walking = false;
    //         break :blk;
    //     }
    //     if (file.?.kind == .file) {
    //         const path = file.?.path;
    //         var split_iter = std.mem.splitBackwardsAny(u8, path, ".");
    //         var extension = split_iter.first();
    //         if (std.mem.eql(u8, extension, "zig")) {
    //             std.debug.print("Adding zig file {s}...\n", .{path});
    //             try zig_files.append(b.dupe(path));
    //             var arr:  [50]u8 = undefined;
    //             var buf = arr[0..];
    //             var z_file_path = try std.fmt.bufPrint(buf, "lib/{s}", .{path});
    //             var z_file = try std.fs.cwd().openFile(z_file_path, .{});
    //             const zig_contents = try z_file.readToEndAlloc(b.allocator, 64000);
    //             const index = std.mem.indexOf(u8, zig_contents, "pub fn post");
    //             if (index) |i| {
    //                 std.debug.print("Found post endpoint in {s}\n", .{z_file_path});
    //                 var routes_file = try src_dir.createFile("routes.zig", .{});
    //                 _ = try routes_file.write(zig_contents[i..]);
    //                 std.debug.print("Wrote {s}... to routes.zig\n", .{zig_contents[0..10]});
    //             }

    //         }
    //         else if (std.mem.eql(u8, extension, "html")) {
    //             std.debug.print("Adding markup file {s}...\n", .{path});
    //             try markup_files.append(b.dupe(path));
    //         } else {
    //             std.debug.print("Unrecognized file extension {s}\t{s}\n", .{extension, path});
    //         }
    //    }
    //     // std.debug.print("Got entry in `versions:` base: {s}, path: {s}, kind: {any}\n", .{ ver.?.basename, ver.?.path, ver.?.kind });
    // }


    // // Add the file names as an option to the exe, making it available
    // // as a string array at comptime in main.zig
    // options.addOption([]const []const u8, "zig_files", zig_files.items);
    // options.addOption([]const []const u8, "markup_files", markup_files.items);
    // exe.addOptions("options", options);
}