const std = @import("std");
const fs = std.fs;

const tclvfs_dotversion = "1.4.2";
const tclvfs_nodotversion = "142";

pub fn vfsadd_tclvfs_files(comptime tcldir: []const u8, comptime subdir: []const u8, b: *std.Build, vfswrite: *std.Build.Step.WriteFile) !*std.Build.Step.WriteFile {
    //_ = tcldir;
    //const version = "1.4.2";
    //recursive copy
    //_ = make_vfs_root.addCopyDirectory(b.path(tcl_source_folder ++ "/../tclvfs/library"), "base/lib/vfs1.4.2", .{});
    _ = vfswrite.addCopyDirectory(b.path(tcldir ++ "/" ++ subdir ++ "/library"), b.pathJoin(&.{ "base", "lib", "vfs" ++ tclvfs_dotversion }), .{});

    return vfswrite;
}
pub fn build_tclvfs(comptime tcldir: []const u8, comptime subdir: []const u8, b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode, stublib: *std.Build.Step.Compile) !*std.Build.Step.Compile {
    //review - libname Vfs vs vfs???
    const slib = b.addLibrary(.{
        .linkage = .static,
        .name = "Vfs",
        .root_module = b.createModule(.{
            .target = target,
            .optimize = optimize,
        }),
    });

    _ = stublib;
    var flags = std.array_list.Managed([]const u8).init(b.allocator);
    defer flags.deinit();
    //try flags.appendSlice(&.{ "-Wall", "-O3" });
    try flags.appendSlice(&.{ "-Wall", "-O2", "-fomit-frame-pointer" });
    try flags.appendSlice(&.{
        "-DPACKAGE_NAME=\"vfs\"",
        "-DPACKAGE_TARNAME=\"vfs\"",
        "-DPACKAGE_VERSION=\"" ++ tclvfs_dotversion ++ "\"",
        "-DPACKAGE_STRING=\"vfs " ++ tclvfs_dotversion ++ "\"",
        "-DPACKAGE_BUGREPORT=\"\"",
        "-DPACKAGE_URL=\"\"",
        "-DBUILD_VFS=1",
        "-DTCL_CFG_OPTIMIZED=1",
        "-DUSE_TCL_STUBS=0",
        "-DZIPFS_BUILD=1",
        "-DTCL_WIDE_INT_TYPE=long long",
        "-DSTATIC_BUILD",
        // ...
        //"-static-libgcc",
    });
    //-DBUILD_VFS only on windows? value?

    var sources = std.array_list.Managed([]const u8).init(b.allocator);
    try sources.append(subdir ++ "/generic/vfs.c");
    slib.root_module.addIncludePath(b.path(subdir));
    slib.root_module.addIncludePath(b.path(subdir ++ "/generic"));
    slib.root_module.addIncludePath(b.path(tcldir ++ "/generic"));
    slib.root_module.addIncludePath(b.path(tcldir ++ "/generic"));
    slib.root_module.addIncludePath(b.path(tcldir ++ "/win"));
    slib.root_module.addCSourceFiles(.{
        .files = sources.items,
        .flags = flags.items,
    });

    //slib.root_module.linkLibrary(stublib);
    slib.root_module.link_libc = true;
    slib.root_module.addWin32ResourceFile(.{
        .file = b.path(subdir ++ "/win/tclvfs.rc"),
        .flags = &.{
            "-DPACKAGE_MAJOR=1",
            "-DPACKAGE_MINOR=4",
            "-DPACKAGE_VERSION=" ++ tclvfs_dotversion,
            "-DDOTVERSION=" ++ tclvfs_dotversion,
            "-DCOMMAVERSION=" ++ tclvfs_dotversion,
            "-DVERSION=" ++ tclvfs_nodotversion,
        },
    }); //ignored for non-windows targets
    // COMMAVERSION??? VERSION???

    //b.installArtifact(slib);
    return slib; //static library
}