/*

 * AboutOss is an utility library to retrieve and display

 * opensource licenses in Android applications.

 *

 * Copyright (C) 2023-2025 by Frederic-Charles Barthelery.

 *

 * This file is part of AboutOss.

 *

 * AboutOss 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 3 of the License, or

 * (at your option) any later version.

 *

 * AboutOss 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with AboutOss.  If not, see <http://www.gnu.org/licenses/>.

 */

package com.geekorum.aboutoss.ui.common

import androidx.compose.runtime.Composable

import androidx.compose.runtime.remember

import java.awt.Desktop

import java.net.URI

import java.util.Locale

/**

 * A [BrowserLauncher] for the desktop platform

 */

class DesktopBrowserLauncher : BrowserLauncher {

    private val desktopLauncher = run {

        if (Desktop.isDesktopSupported()) {

            val desktop = Desktop.getDesktop()

            if (desktop.isSupported(Desktop.Action.BROWSE)) {

                return@run DesktopLauncher(desktop)

            }

        }

        null

    }

    private val openCommandLauncher = OpenCommandLauncher()

    override fun launchUrl(link: String) {

        try {

            desktopLauncher?.launchUrl(link)

            return

        } catch (e: Exception) {

            e.printStackTrace()

            System.err.println("Unable to launch url $link. Use fallback")

        }

        try {

            openCommandLauncher.launchUrl(link)

            return

        } catch (e: Exception) {

            e.printStackTrace()

            System.err.println("Unable to launch url $link")

        }

    }

    override fun mayLaunchUrl(vararg uris: String) {

    }

}

/**

 * Creates and [androidx.compose.runtime.remember] a [BrowserLauncher]

 */

@Composable

actual fun rememberBrowserLauncher(): BrowserLauncher {

    return remember { DesktopBrowserLauncher() }

}

private interface Launcher {

    fun launchUrl(link: String)

}

private class DesktopLauncher(

    private val desktop: Desktop

) : Launcher {

    override fun launchUrl(link: String) {

        desktop.browse(URI(link))

    }

}

private class OpenCommandLauncher: Launcher {

    override fun launchUrl(link: String) {

        val osName = System.getProperty("os.name").lowercase(Locale.getDefault())

        val command = when {

            "mac" in osName -> "open"

            "nix" in osName || "nux" in osName -> "xdg-open"

            else -> error("cannot open $link")

        }

        ProcessBuilder(command, link)

            .start()

    }

}