/* 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 http://mozilla.org/MPL/2.0/. */

package org.mozilla.focus.contextmenu

import android.content.Context
import android.os.Environment
import android.view.View
import mozilla.components.feature.app.links.AppLinksUseCases
import mozilla.components.feature.contextmenu.ContextMenuCandidate
import mozilla.components.feature.contextmenu.ContextMenuUseCases
import mozilla.components.feature.tabs.TabsUseCases
import mozilla.components.ui.widgets.DefaultSnackbarDelegate
import mozilla.components.ui.widgets.SnackbarDelegate

/** Utility for providing context menu candidates. */
object ContextMenuCandidates {

    /**
     * Returns a list of context menu candidates based on whether the browser is currently in a Custom Tab or a standard
     * browser session.
     *
     * @param context The current Android context.
     * @param tabsUseCases [TabsUseCases] used to interact with browser tabs (e.g., opening links).
     * @param contextMenuUseCases [ContextMenuUseCases] used to integrate other features.
     * @param appLinksUseCases [AppLinksUseCases] used to handle external application links.
     * @param snackBarParentView The [View] to be used as a parent when displaying SnackBar notifications.
     * @param snackbarDelegate [SnackbarDelegate] responsible for showing SnackBars (defaults to
     *   [DefaultSnackbarDelegate]).
     * @param isCustomTab Boolean flag indicating if the menu is being requested from a Custom Tab.
     * @return A list of [ContextMenuCandidate] objects containing the relevant menu items.
     */
    fun get(
        context: Context,
        tabsUseCases: TabsUseCases,
        contextMenuUseCases: ContextMenuUseCases,
        appLinksUseCases: AppLinksUseCases,
        snackBarParentView: View,
        snackbarDelegate: SnackbarDelegate = DefaultSnackbarDelegate(),
        isCustomTab: Boolean,
    ): List<ContextMenuCandidate> {
        return if (isCustomTab) {
            getCustomTabCandidates(
                context = context,
                contextMenuUseCases = contextMenuUseCases,
                snackBarParentView = snackBarParentView,
                snackbarDelegate = snackbarDelegate,
            )
        } else {
            getBrowserCandidates(
                context = context,
                tabsUseCases = tabsUseCases,
                contextMenuUseCases = contextMenuUseCases,
                appLinksUseCases = appLinksUseCases,
                snackBarParentView = snackBarParentView,
                snackbarDelegate = snackbarDelegate,
            )
        }
    }

    private fun getCustomTabCandidates(
        context: Context,
        contextMenuUseCases: ContextMenuUseCases,
        snackBarParentView: View,
        snackbarDelegate: SnackbarDelegate,
    ): List<ContextMenuCandidate> =
        listOf(
            ContextMenuCandidate.createCopyLinkCandidate(context, snackBarParentView, snackbarDelegate),
            ContextMenuCandidate.createShareLinkCandidate(context),
        ) +
            getMediaCandidates(context, contextMenuUseCases) +
            listOf(
                ContextMenuCandidate.createCopyImageLocationCandidate(
                    context,
                    snackBarParentView,
                    snackbarDelegate,
                )
            )

    private fun getBrowserCandidates(
        context: Context,
        tabsUseCases: TabsUseCases,
        contextMenuUseCases: ContextMenuUseCases,
        appLinksUseCases: AppLinksUseCases,
        snackBarParentView: View,
        snackbarDelegate: SnackbarDelegate,
    ): List<ContextMenuCandidate> =
        listOf(
            ContextMenuCandidate.createOpenInPrivateTabCandidate(
                context,
                tabsUseCases,
                snackBarParentView,
                snackbarDelegate,
            ),
            ContextMenuCandidate.createCopyLinkCandidate(context, snackBarParentView, snackbarDelegate),
            ContextMenuCandidate.createDownloadLinkCandidate(
                context = context,
                contextMenuUseCases = contextMenuUseCases,
                downloadsLocation = ::getDownloadsDirectory,
            ),
            ContextMenuCandidate.createShareLinkCandidate(context),
            ContextMenuCandidate.createShareImageCandidate(context, contextMenuUseCases),
            ContextMenuCandidate.createOpenImageInNewTabCandidate(
                context,
                tabsUseCases,
                snackBarParentView,
                snackbarDelegate,
            ),
        ) +
            getMediaCandidates(context, contextMenuUseCases) +
            listOf(
                ContextMenuCandidate.createCopyImageLocationCandidate(
                    context,
                    snackBarParentView,
                    snackbarDelegate,
                ),
                ContextMenuCandidate.createAddContactCandidate(context),
                ContextMenuCandidate.createShareEmailAddressCandidate(context),
                ContextMenuCandidate.createCopyEmailAddressCandidate(
                    context,
                    snackBarParentView,
                    snackbarDelegate,
                ),
                ContextMenuCandidate.createOpenInExternalAppCandidate(context, appLinksUseCases),
            )

    private fun getMediaCandidates(
        context: Context,
        contextMenuUseCases: ContextMenuUseCases,
    ): List<ContextMenuCandidate> =
        listOf(
            ContextMenuCandidate.createSaveImageCandidate(
                context = context,
                contextMenuUseCases = contextMenuUseCases,
                downloadsLocation = ::getDownloadsDirectory,
            ),
            ContextMenuCandidate.createSaveVideoAudioCandidate(
                context = context,
                contextMenuUseCases = contextMenuUseCases,
                downloadsLocation = ::getDownloadsDirectory,
            ),
        )

    private fun getDownloadsDirectory(): String =
        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).path
}