const std = @import("std");
const builtin = @import("builtin");
const shared = @import("src/shared.zig");

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

    const mode = b.standardReleaseOptions();
    const exe = b.addExecutable("zls", "src/main.zig");
    exe.use_stage1 = true;
    const exe_options = b.addOptions();
    exe.addOptions("build_options", exe_options);

    exe_options.addOption(
        shared.ZigVersion,
        "data_version",
        b.option(shared.ZigVersion, "data_version", "The Zig version your compiler is.") orelse .master,
    );

    exe_options.addOption(
        std.log.Level,
        "log_level",
        b.option(std.log.Level, "log_level", "The Log Level to be used.") orelse .info,
    );

    const enable_tracy = b.option(bool, "enable_tracy", "Whether tracy should be enabled.") orelse false;

    exe_options.addOption(
        bool,
        "enable_tracy",
        enable_tracy,
    );

    exe_options.addOption(
        bool,
        "enable_tracy_allocation",
        b.option(bool, "enable_tracy_allocation", "Enable using TracyAllocator to monitor allocations.") orelse false,
    );

    exe_options.addOption(
        bool,
        "enable_tracy_callstack",
        b.option(bool, "enable_tracy_callstack", "Enable callstack graphs.") orelse false,
    );

    const KNOWN_FOLDERS_DEFAULT_PATH = "src/known-folders/known-folders.zig";
    const known_folders_path = b.option([]const u8, "known-folders", "Path to known-folders package (default: " ++ KNOWN_FOLDERS_DEFAULT_PATH ++ ")") orelse KNOWN_FOLDERS_DEFAULT_PATH;
    exe.addPackage(.{ .name = "known-folders", .source = .{ .path = known_folders_path } });

    if (enable_tracy) {
        const client_cpp = "src/tracy/TracyClient.cpp";

        // On mingw, we need to opt into windows 7+ to get some features required by tracy.
        const tracy_c_flags: []const []const u8 = if (target.isWindows() and target.getAbi() == .gnu)
            &[_][]const u8{ "-DTRACY_ENABLE=1", "-fno-sanitize=undefined", "-D_WIN32_WINNT=0x601" }
        else
            &[_][]const u8{ "-DTRACY_ENABLE=1", "-fno-sanitize=undefined" };

        exe.addIncludePath("src/tracy");
        exe.addCSourceFile(client_cpp, tracy_c_flags);
        exe.linkSystemLibraryName("c++");
        exe.linkLibC();

        if (target.isWindows()) {
            exe.linkSystemLibrary("dbghelp");
            exe.linkSystemLibrary("ws2_32");
        }
    }

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

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

    const test_step = b.step("test", "Run all the tests");
    test_step.dependOn(b.getInstallStep());

    var unit_tests = b.addTest("src/unit_tests.zig");
    unit_tests.use_stage1 = true;
    unit_tests.setBuildMode(.Debug);
    unit_tests.setTarget(target);
    test_step.dependOn(&unit_tests.step);

    var session_tests = b.addTest("tests/sessions.zig");
    session_tests.use_stage1 = true;
    session_tests.addPackage(.{ .name = "header", .source = .{ .path = "src/header.zig" } });
    session_tests.addPackage(.{ .name = "server", .source = .{ .path = "src/Server.zig" }, .dependencies = exe.packages.items });
    session_tests.setBuildMode(.Debug);
    session_tests.setTarget(target);
    test_step.dependOn(&session_tests.step);
}