const std = @import("std");

pub fn build(b: *std.build.Builder) !void {
    const target = b.standardTargetOptions(.{});
    // Standard release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    const optimize = b.standardOptimizeOption(.{});

    const facil_dep = b.dependency("facil.io", .{
        .target = target,
        .optimize = optimize,
    });

    // create a module to be used internally.
    var zap_module = b.createModule(.{
        .source_file = .{ .path = "src/zap.zig" },
    });

    // register the module so it can be referenced
    // using the package manager.
    // TODO: How to automatically integrate the
    // facil.io dependency with the module?
    try b.modules.put(b.dupe("zap"), zap_module);

    const facil_lib = b.addStaticLibrary(.{
        .name = "facil.io",
        .target = target,
        .optimize = optimize,
    });

    facil_lib.linkLibrary(facil_dep.artifact("facil.io"));
    facil_lib.install();

    inline for ([_]struct {
        name: []const u8,
        src: []const u8,
    }{
        .{ .name = "hello", .src = "examples/hello/hello.zig" },
        .{ .name = "hello2", .src = "examples/hello2/hello2.zig" },
        .{ .name = "routes", .src = "examples/routes/routes.zig" },
        .{ .name = "serve", .src = "examples/serve/serve.zig" },
        .{ .name = "hello_json", .src = "examples/hello_json/hello_json.zig" },
        .{ .name = "endpoint", .src = "examples/endpoint/main.zig" },
        .{ .name = "wrk", .src = "wrk/zig/main.zig" },
        .{ .name = "mustache", .src = "examples/mustache/mustache.zig" },
    }) |excfg| {
        const ex_name = excfg.name;
        const ex_src = excfg.src;
        const ex_build_desc = try std.fmt.allocPrint(
            b.allocator,
            "build the {s} example",
            .{ex_name},
        );
        const ex_run_stepname = try std.fmt.allocPrint(
            b.allocator,
            "run-{s}",
            .{ex_name},
        );
        const ex_run_stepdesc = try std.fmt.allocPrint(
            b.allocator,
            "run the {s} example",
            .{ex_name},
        );
        const example_run_step = b.step(ex_run_stepname, ex_run_stepdesc);
        const example_step = b.step(ex_name, ex_build_desc);

        var example = b.addExecutable(.{
            .name = ex_name,
            .root_source_file = .{ .path = ex_src },
            .target = target,
            .optimize = optimize,
        });

        example.linkLibrary(facil_dep.artifact("facil.io"));

        example.addModule("zap", zap_module);

        const example_run = example.run();
        example_run_step.dependOn(&example_run.step);

        // install the artifact - depending on the "example"
        const example_build_step = b.addInstallArtifact(example);
        example_step.dependOn(&example_build_step.step);
    }

    //
    // TOOLS & TESTING
    //

    // authenticating http client for internal testing
    //
    var http_client_exe = b.addExecutable(.{
        .name = "http_client",
        .root_source_file = .{ .path = "./src/http_client.zig" },
        .target = target,
        .optimize = optimize,
    });
    var http_client_step = b.step("http_client", "Build the http_client for internal testing");
    http_client_exe.linkLibrary(facil_dep.artifact("facil.io"));
    http_client_exe.addModule("zap", zap_module);
    const http_client_build_step = b.addInstallArtifact(http_client_exe);
    http_client_step.dependOn(&http_client_build_step.step);

    // test runner for auth tests
    //
    var http_client_runner_exe = b.addExecutable(.{
        .name = "http_client_runner",
        .root_source_file = .{ .path = "./src/http_client_testrunner.zig" },
        .target = target,
        .optimize = optimize,
    });
    var http_client_runner_step = b.step("http_client_runner", "Build the http_client test runner for internal testing");
    http_client_runner_exe.linkLibrary(facil_dep.artifact("facil.io"));
    http_client_runner_exe.addModule("zap", zap_module);
    const http_client_runner_build_step = b.addInstallArtifact(http_client_runner_exe);
    http_client_runner_step.dependOn(&http_client_runner_build_step.step);
    http_client_runner_exe.step.dependOn(&http_client_build_step.step);

    // tests
    //
    const exe_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/test_auth.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe_tests.linkLibrary(facil_dep.artifact("facil.io"));
    exe_tests.addModule("zap", zap_module);
    exe_tests.step.dependOn(&http_client_runner_build_step.step);

    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&exe_tests.step);
}