/*
 * Copyright (C) 2024 by Claudio Cambra <claudio.cambra@nextcloud.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 */

import ArgumentParser
import Foundation

struct MacCrafter: ParsableCommand {
    static let configuration = CommandConfiguration(
        abstract: "A tool to easily build a fully-functional Nextcloud Desktop Client for macOS."
    )

    enum MacCrafterError: Error {
        case failedEnumeration(String)
    }

    @Argument(help: "Path to the root directory of the Nextcloud Desktop Client git repository.")
    var repoRootDir = "\(FileManager.default.currentDirectoryPath)/../../.."

    @Option(name: [.short, .long], help: "Code signing identity for desktop client and libs.")
    var codeSignIdentity: String?

    @Option(name: [.short, .customLong("buildPath")], help: "Path for build files to be written.")
    var buildPath = "\(FileManager.default.currentDirectoryPath)/build"

    @Option(name: [.long], help: "Brew installation script URL.")
    var brewInstallShUrl = "https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh"

    @Option(name: [.long], help: "CraftMaster git url.")
    var craftMasterGitUrl = "https://invent.kde.org/packaging/craftmaster.git"

    @Option(name: [.long], help: "Nextcloud Desktop Client git url.")
    var clientBlueprintsGitUrl = "https://github.com/nextcloud/desktop-client-blueprints.git"

    @Option(name: [.long], help: "Build type (e.g. Release, RelWithDebInfo, MinSizeRel, Debug).")
    var buildType = "RelWithDebInfo"

    @Option(name: [.long], help: "Skip code-signing dependency libraries and plugins.")
    var skipDependencyCodeSigning = false

    mutating func run() throws {
        print("Configuring build tooling.")

        try installIfMissing("git", "xcode-select --install")
        try installIfMissing(
            "brew",
            "curl -fsSL \(brewInstallShUrl) | /bin/bash",
            installCommandEnv: ["NONINTERACTIVE": "1"]
        )
        try installIfMissing("inkscape", "brew install inkscape")
        try installIfMissing("python3", "brew install pyenv && pyenv install 3.12.4")

        print("Build tooling configured.")
        print("Configuring KDE Craft.")

        let craftMasterDir = "\(buildPath)/craftmaster"
        let fm = FileManager.default

        if fm.fileExists(atPath: craftMasterDir) {
            print("KDE Craft is already cloned.")
        } else {
            print("Cloning KDE Craft...")
            shell("git clone --depth=1 \(craftMasterGitUrl) \(craftMasterDir)")
        }

        print("Configuring Nextcloud Desktop Client blueprints for KDE Craft...")

        let craftMasterIni = "\(repoRootDir)/craftmaster.ini"
        let craftMasterPy = "\(craftMasterDir)/CraftMaster.py"
        let craftTarget = "macos-clang-arm64"
        let craftCommand = 
            "python3 \(craftMasterPy) --config \(craftMasterIni) --target \(craftTarget) -c"
        shell("\(craftCommand) --add-blueprint-repository \(clientBlueprintsGitUrl)")

        print("Crafting KDE Craft...")
        shell("\(craftCommand) craft")

        print("Crafting Nextcloud Desktop Client dependencies...")
        shell("\(craftCommand) --install-deps nextcloud-client")

        if !skipDependencyCodeSigning, let codeSignIdentity {
            print("Code-signing Nextcloud Desktop Client libraries and frameworks...")

            let craftLibDir = "\(buildPath)/\(craftTarget)/lib"
            let craftLibs = try fm.contentsOfDirectory(atPath: craftLibDir)
            for lib in craftLibs {
                guard isLibrary(lib) else { continue }
                try codesign(identity: codeSignIdentity, path: "\(craftLibDir)/\(lib)")
            }

            let craftPluginsDir = "\(buildPath)/\(craftTarget)/plugins"
            guard let craftPluginsEnumerator = fm.enumerator(atPath: craftPluginsDir) else {
                throw MacCrafterError.failedEnumeration(
                    "Failed to list craft plugins directory at \(craftPluginsDir)."
                )
            }

            for case let plugin as String in craftPluginsEnumerator {
                guard isLibrary(plugin) else { continue }
                try codesign(identity: codeSignIdentity, path: "\(craftPluginsDir)/\(plugin)")
            }
        }

        print("Crafting Nextcloud Desktop Client...")
        shell("\(craftCommand) --src-dir \(repoRootDir) -i --build-type \(buildType) nextcloud-client")
    }
}

MacCrafter.main()