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// Copyright 2026 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 CustomElements = @import("./build/CustomElements.zig");
const Elm = @import("./build/Elm.zig");

const BuildEditorParameters = struct {
    main: std.Build.LazyPath,
    files: []const std.Build.LazyPath,
    optimize: std.builtin.OptimizeMode,
};

fn buildEditor(b: *std.Build, params: BuildEditorParameters) Elm {
    const compile = Elm.init(b, .{
        .optimize = params.optimize,
    });

    compile.addMainElmSourceFile(params.main);

    compile.addElmSourceFile(b.path("src/Html/LivingStandard.elm"));
    compile.addElmSourceFile(b.path("src/Length.elm"));
    compile.addElmSourceFile(b.path("src/Preferences.elm"));
    compile.addElmSourceFile(b.path("src/Preferences/App.elm"));
    compile.addElmSourceFile(b.path("src/Template/Layout.elm"));
    compile.addElmSourceFile(b.path("src/Template/Layout/Container.elm"));
    compile.addElmSourceFile(b.path("src/Template/Layout/Coordinate.elm"));
    compile.addElmSourceFile(b.path("src/Template/Layout/Item.elm"));
    compile.addElmSourceFile(b.path("src/Svg/Path.elm"));
    compile.addElmSourceFile(b.path("src/Url/SearchParams.elm"));

    for (params.files) |file| {
        compile.addElmSourceFile(file);
    }

    return compile;
}

pub fn build(b: *std.Build) !void {
    const optimize = b.standardOptimizeOption(.{});
    const custom_elements_compiler = b.option(
        []const u8,
        "custom-elements-compiler",
        "Path to custom elements compiler binary",
    ) orelse "custom_elements_compiler";

    const elements_js = elements_js: {
        const compile = CustomElements.init(b, .{
            .entrypoint = b.path("src/elements/main.js"),
            .exe = custom_elements_compiler,
        });

        break :elements_js compile.output_js;
    };

    const pws01 = pws01: {
        const dir = b.addWriteFiles();

        const app = buildEditor(b, .{
            .optimize = optimize,
            .main = b.path("src/Models/PWS01/Main.elm"),
            .files = &.{
                b.path("src/Models/PWS01/Template.elm"),
                b.path("src/Models/PWS01/Template/Cuts.elm"),
                b.path("src/Models/PWS01/Template/InfoArea.elm"),
                b.path("src/Models/PWS01/QueryHealer.elm"),
                b.path("src/Models/PWS01/Parameters.elm"),
                b.path("src/Models/PWS01/Parameters/App.elm"),
                b.path("src/Models/PWS01/Parameters/Constraints.elm"),
                b.path("src/Models/PWS01/Parameters/Key.elm"),
                b.path("src/Models/PWS01/Parameters/Parser.elm"),
            },
        });

        _ = dir.addCopyFile(b.path("src/pws01/index.html"), "index.html");
        _ = dir.addCopyFile(app.output_js, "main.js");
        _ = dir.addCopyFile(app.generateThirdPartyLicenseText(), "licenses/third-party.txt");

        break :pws01 dir;
    };

    const dist = dist: {
        const dir = b.addWriteFiles();

        _ = dir.addCopyFile(b.path("src/index.html"), "index.html");
        _ = dir.addCopyFile(elements_js, "elements.js");

        _ = dir.addCopyDirectory(b.path("vendor/barlow"), "vendor/barlow", .{});
        _ = dir.addCopyDirectory(b.path("vendor/Inter"), "vendor/Inter", .{});

        _ = dir.addCopyFile(b.path("LICENSES/MPL-2.0.txt"), "licenses/MPL-2.0.txt");
        _ = dir.addCopyFile(b.path("LICENSES/OFL-1.1-no-RFN.txt"), "licenses/OFL-1.1-no-RFN.txt");

        _ = dir.addCopyDirectory(pws01.getDirectory(), "pws01", .{});

        break :dist dir;
    };

    // "zig build" (default step)
    {
        const install = b.addInstallDirectory(.{
            .source_dir = dist.getDirectory(),
            .install_dir = .{ .custom = "" },
            .install_subdir = "",
        });

        b.default_step.dependOn(&install.step);
    }
}