const std = @import("std");

const Builder = std.Build;
const SemanticVersion = std.SemanticVersion;

const share_prefix = "share/arkta/es/";

const version = "0.3.0";
const semver = SemanticVersion.parse(version) catch unreachable;

const config = struct {
    template: []const u8 = @embedFile("es.ini.in"),
    default: struct {
        hard_tabs: bool = false,
        line_limit: usize = 100,
        page_overlap: usize = 2,
        tab_stop: usize = 4,
    } = .{},
}{};

fn installGeneratedFile(b: *Builder, comptime name: []const u8, data: []const u8) void {
    const write_files = b.addWriteFiles();
    const write_file = write_files.add(name, data);
    const write_file_install = b.addInstallFile(write_file, share_prefix ++ name);
    write_file_install.step.dependOn(&write_files.step);

    b.getInstallStep().dependOn(&write_file_install.step);
}

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

    const options = b.addOptions();
    options.addOption(SemanticVersion, "es_version", semver);
    options.addOption(bool, "default_hard_tabs", config.default.hard_tabs);
    options.addOption(usize, "default_line_limit", config.default.line_limit);
    options.addOption(usize, "default_page_overlap", config.default.page_overlap);
    options.addOption(usize, "default_tab_stop", config.default.tab_stop);

    const exe = b.addExecutable(.{
        .name = "es",
        .version = semver,
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe.root_module.addOptions("es-config", options);
    b.installArtifact(exe);

    installGeneratedFile(
        b,
        "es.ini",
        comptime std.fmt.comptimePrint(config.template, config.default),
    );

    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);
}