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

const zinput = @import("src/zinput/src/main.zig");

var builder: *std.build.Builder = undefined;

pub fn config(step: *std.build.Step) anyerror!void {
    @setEvalBranchQuota(2500);
    std.debug.warn("Welcome to the ZLS configuration wizard! (insert mage emoji here)\n", .{});

    // std.debug.warn("{}", .{dir.});

    const lib_path = try zinput.askDirPath(builder.allocator, "What is your Zig lib path (path that contains the 'std' folder)?", 512);
    const snippets = try zinput.askBool("Do you want to enable snippets?");
    const style = try zinput.askBool("Do you want to enable style warnings?");

    var dir = try std.fs.cwd().openDir(builder.exe_dir, .{});
    defer dir.close();

    var file = try dir.openFile("zls.json", .{ .write = true });
    defer file.close();

    const out = file.outStream();

    std.debug.warn("Writing to config...\n", .{});

    const content = std.json.stringify(.{
        .zig_lib_path = lib_path,
        .enable_snippets = snippets,
        .warn_style = style,
    }, std.json.StringifyOptions{}, out);

    std.debug.warn("Successfully saved configuration options!\n", .{});

    const editor = try zinput.askSelectOne("Which code editor do you use?", enum { VSCode, Sublime, Kate, Other });
    std.debug.warn("\n", .{});

    switch (editor) {
        .VSCode => {
            std.debug.warn(
                \\To use ZLS in Visual Studio Code, install the 'ZLS for VSCode' extension.
                \\Then, open VSCode's 'settings.json' file, and add `"zigLanguageClient.path": "[command_or_path_to_zls]"`.
            , .{});
        },
        .Sublime => {
            std.debug.warn(
                \\To use ZLS in Sublime, install the `LSP` package from `https://github.com/sublimelsp/LSP/releases` or via Package Control.
                \\Then, add the following snippet to `LSP`'s user settings:
                \\
                \\{{
                \\  "clients": {{
                \\    "zig": {{
                \\      "command": ["zls"],
                \\      "enabled": true,
                \\      "languageId": "zig",
                \\      "scopes": ["source.zig"],
                \\      "syntaxes": ["Packages/Zig/Syntaxes/Zig.tmLanguage"]
                \\    }}
                \\  }}
                \\}}
            , .{});
        },
        .Kate => {
            std.debug.warn(
                \\To use ZLS in Kate, enable `LSP client` plugin in Kate settings.
                \\Then, add the following snippet to `LSP client's` user settings:
                \\(or paste it in `LSP client's` GUI settings)
                \\{{
                \\    "servers": {{
                \\        "zig": {{
                \\            "command": ["zls"],
                \\            "url": "https://github.com/zigtools/zls",
                \\            "highlightingModeRegex": "^Zig$"
                \\        }}
                \\    }}
                \\}}
            , .{});
        },
        .Other => {
            std.debug.warn(
                \\We might not *officially* support your editor, but you can definitely still use ZLS!
                \\Simply configure your editor for use with language servers and point it to the ZLS executable!
            , .{});
        },
    }

    std.debug.warn("\nYou can find the ZLS executable in the \"zig-cache/bin\" by default.\nNOTE: Make sure that if you move the ZLS executable, you move the `zls.json` config file with it as well!\n\nAnd finally: Thanks for choosing ZLS!\n\n", .{});
}

pub fn build(b: *std.build.Builder) !void {
    builder = b;
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    const target = b.standardTargetOptions(.{});

    // Standard release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    const mode = b.standardReleaseOptions();

    const exe = b.addExecutable("zls", "src/main.zig");

    const data_version = try std.mem.concat(b.allocator, u8, &[3][]const u8{ "\"", b.option([]const u8, "data_version", "The data version - either 0.6.0 or master.") orelse "0.6.0", "\"" });
    defer b.allocator.free(data_version);
    exe.addBuildOption(
        []const u8,
        "data_version",
        data_version,
    );

    exe.addBuildOption(
        bool,
        "allocation_info",
        b.option(bool, "allocation_info", "Enable use of debugging allocator and info logging.") orelse false,
    );

    exe.addPackage(.{ .name = "known-folders", .path = "src/known-folders/known-folders.zig" });

    exe.setTarget(target);
    exe.setBuildMode(mode);
    exe.install();

    b.installFile("src/special/build_runner.zig", "bin/build_runner.zig");

    const run_cmd = exe.run();
    run_cmd.step.dependOn(b.getInstallStep());

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    // const configure_step = std.build.Step.init("config", b.allocator, config);
    const configure_step = b.step("config", "Configure zls");
    configure_step.makeFn = config;
}