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// Copyright 2025 Shota FUJI
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
// SPDX-License-Identifier: MPL-2.0

const std = @import("std");

const CompileVala = @import("./build/CompileVala.zig");
const manifest = @import("./build.zig.zon");

const app_name = "jp.pocka.timetracker";

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

    const version = b.option(
        []const u8,
        "version",
        "Application version. Defaults to `version` field in \"build.zig.zon\".",
    ) orelse manifest.version;

    const app_id = b.option(
        []const u8,
        "app-id",
        b.fmt("Application ID. Defaults to \"{s}\"", .{app_name}),
    ) orelse app_name;

    // System libraries to link.
    const system_libraries = [_][]const u8{
        "glib-2.0",
        "gtk4",
        "libadwaita-1",
    };

    const vala_main = vala_main: {
        var compile = try CompileVala.init(b, .{
            .src = b.path("src"),
            .includeTestFiles = false,
        });

        for (system_libraries) |lib| {
            compile.addPackage(lib);
        }

        compile.addPackage("posix");
        compile.addPackage("Config");

        compile.addVapi(b.path("src/Config.vapi"));

        const step = b.step("valac", "Compile C source code from Vala files for debugging purpose");
        step.dependOn(compile.step);

        break :vala_main compile;
    };

    const exe = exe: {
        const exe = b.addExecutable(.{
            .name = app_name,
            .root_module = b.createModule(.{
                .link_libc = true,
                .target = target,
                .optimize = optimize,
            }),
        });

        exe.root_module.addCMacro("APP_VERSION", b.fmt("\"{s}\"", .{version}));
        exe.root_module.addCMacro("APP_ID", b.fmt("\"{s}\"", .{app_id}));

        for (system_libraries) |lib| {
            exe.linkSystemLibrary(lib);
        }

        for (vala_main.compiled_c_files) |file| {
            exe.addCSourceFile(.{ .file = file });
        }

        break :exe exe;
    };

    // Default install step
    {
        b.installArtifact(exe);
    }

    // "zig build test"
    {
        var valac = try CompileVala.init(b, .{
            .src = b.path("src"),
            .includeTestFiles = true,
            .includeMainVala = false,
        });

        for (system_libraries) |lib| {
            valac.addPackage(lib);
        }

        valac.addPackage("posix");
        valac.addPackage("Config");

        valac.addVapi(b.path("src/Config.vapi"));

        const test_exe = b.addExecutable(.{
            .name = "test",
            .root_module = b.createModule(.{
                .link_libc = true,
                .target = target,
                .optimize = optimize,
            }),
        });

        test_exe.root_module.addCMacro("APP_VERSION", b.fmt("\"{s}-test\"", .{version}));
        test_exe.root_module.addCMacro("APP_ID", b.fmt("\"{s}.test\"", .{app_id}));

        for (system_libraries) |lib| {
            test_exe.linkSystemLibrary(lib);
        }

        for (valac.compiled_c_files) |file| {
            test_exe.addCSourceFile(.{ .file = file });
        }

        const run = b.addRunArtifact(test_exe);

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