/* 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 mozilla.components.feature.customtabs

import android.app.PendingIntent
import android.content.Intent
import android.content.res.Resources
import android.graphics.Bitmap
import android.os.Bundle
import android.os.Parcelable
import androidx.annotation.ColorInt
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_ACTION_BUTTON_BUNDLE
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_CLOSE_BUTTON_ICON
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_ENABLE_URLBAR_HIDING
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_EXIT_ANIMATION_BUNDLE
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_MENU_ITEMS
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_NAVIGATION_BAR_COLOR
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_SESSION
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_SHARE_STATE
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_TINT_ACTION_BUTTON
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_TITLE_VISIBILITY_STATE
import androidx.browser.customtabs.CustomTabsIntent.EXTRA_TOOLBAR_COLOR
import androidx.browser.customtabs.CustomTabsIntent.KEY_DESCRIPTION
import androidx.browser.customtabs.CustomTabsIntent.KEY_ICON
import androidx.browser.customtabs.CustomTabsIntent.KEY_ID
import androidx.browser.customtabs.CustomTabsIntent.KEY_MENU_ITEM_TITLE
import androidx.browser.customtabs.CustomTabsIntent.KEY_PENDING_INTENT
import androidx.browser.customtabs.CustomTabsIntent.NO_TITLE
import androidx.browser.customtabs.CustomTabsIntent.SHARE_STATE_DEFAULT
import androidx.browser.customtabs.CustomTabsIntent.SHARE_STATE_ON
import androidx.browser.customtabs.CustomTabsIntent.SHOW_PAGE_TITLE
import androidx.browser.customtabs.CustomTabsIntent.TOOLBAR_ACTION_BUTTON_ID
import androidx.browser.customtabs.CustomTabsSessionToken
import androidx.browser.customtabs.TrustedWebUtils.EXTRA_LAUNCH_AS_TRUSTED_WEB_ACTIVITY
import mozilla.components.browser.state.state.CustomTabActionButtonConfig
import mozilla.components.browser.state.state.CustomTabConfig
import mozilla.components.browser.state.state.CustomTabMenuItem
import mozilla.components.browser.state.state.ExternalAppType
import mozilla.components.support.utils.SafeIntent
import mozilla.components.support.utils.toSafeBundle
import mozilla.components.support.utils.toSafeIntent
import kotlin.math.max

/**
 * Checks if the provided intent is a custom tab intent.
 *
 * @param intent the intent to check.
 * @return true if the intent is a custom tab intent, otherwise false.
 */
fun isCustomTabIntent(intent: Intent) = isCustomTabIntent(intent.toSafeIntent())

/**
 * Checks if the provided intent is a custom tab intent.
 *
 * @param safeIntent the intent to check, wrapped as a SafeIntent.
 * @return true if the intent is a custom tab intent, otherwise false.
 */
fun isCustomTabIntent(safeIntent: SafeIntent) = safeIntent.hasExtra(EXTRA_SESSION)

/**
 * Checks if the provided intent is a trusted web activity intent.
 *
 * @param intent the intent to check.
 * @return true if the intent is a trusted web activity intent, otherwise false.
 */
fun isTrustedWebActivityIntent(intent: Intent) = isTrustedWebActivityIntent(intent.toSafeIntent())

/**
 * Checks if the provided intent is a trusted web activity intent.
 *
 * @param safeIntent the intent to check, wrapped as a SafeIntent.
 * @return true if the intent is a trusted web activity intent, otherwise false.
 */
fun isTrustedWebActivityIntent(safeIntent: SafeIntent) = isCustomTabIntent(safeIntent) &&
    safeIntent.getBooleanExtra(EXTRA_LAUNCH_AS_TRUSTED_WEB_ACTIVITY, false)

/**
 * Creates a [CustomTabConfig] instance based on the provided intent.
 *
 * @param intent the intent, wrapped as a SafeIntent, which is processed to extract configuration data.
 * @param resources needed in-order to verify that icons of a max size are only provided.
 * @return the CustomTabConfig instance.
 */
fun createCustomTabConfigFromIntent(
    intent: Intent,
    resources: Resources?
): CustomTabConfig {
    val safeIntent = intent.toSafeIntent()

    return CustomTabConfig(
        toolbarColor = safeIntent.getColorExtra(EXTRA_TOOLBAR_COLOR),
        navigationBarColor = safeIntent.getColorExtra(EXTRA_NAVIGATION_BAR_COLOR),
        closeButtonIcon = getCloseButtonIcon(safeIntent, resources),
        enableUrlbarHiding = safeIntent.getBooleanExtra(EXTRA_ENABLE_URLBAR_HIDING, false),
        actionButtonConfig = getActionButtonConfig(safeIntent),
        showShareMenuItem = (safeIntent.getIntExtra(EXTRA_SHARE_STATE, SHARE_STATE_DEFAULT) == SHARE_STATE_ON),
        menuItems = getMenuItems(safeIntent),
        exitAnimations = safeIntent.getBundleExtra(EXTRA_EXIT_ANIMATION_BUNDLE)?.unsafe,
        titleVisible = safeIntent.getIntExtra(EXTRA_TITLE_VISIBILITY_STATE, NO_TITLE) == SHOW_PAGE_TITLE,
        sessionToken = if (intent.extras != null) {
            // getSessionTokenFromIntent throws if extras is null
            CustomTabsSessionToken.getSessionTokenFromIntent(intent)
        } else {
            null
        },
        externalAppType = ExternalAppType.CUSTOM_TAB
    )
}

@ColorInt
private fun SafeIntent.getColorExtra(name: String): Int? =
    if (hasExtra(name)) getIntExtra(name, 0) else null

private fun getCloseButtonIcon(intent: SafeIntent, resources: Resources?): Bitmap? {
    val icon = intent.getParcelableExtra(EXTRA_CLOSE_BUTTON_ICON) as? Bitmap
    val maxSize = resources?.getDimension(R.dimen.mozac_feature_customtabs_max_close_button_size) ?: Float.MAX_VALUE

    return if (icon != null && max(icon.width, icon.height) <= maxSize) {
        icon
    } else {
        null
    }
}

private fun getActionButtonConfig(intent: SafeIntent): CustomTabActionButtonConfig? {
    val actionButtonBundle = intent.getBundleExtra(EXTRA_ACTION_BUTTON_BUNDLE) ?: return null
    val description = actionButtonBundle.getString(KEY_DESCRIPTION)
    val icon = actionButtonBundle.getParcelable(KEY_ICON) as? Bitmap
    val pendingIntent = actionButtonBundle.getParcelable(KEY_PENDING_INTENT) as? PendingIntent
    val id = actionButtonBundle.getInt(KEY_ID, TOOLBAR_ACTION_BUTTON_ID)
    val tint = intent.getBooleanExtra(EXTRA_TINT_ACTION_BUTTON, false)

    return if (description != null && icon != null && pendingIntent != null) {
        CustomTabActionButtonConfig(
            id = id,
            description = description,
            icon = icon,
            pendingIntent = pendingIntent,
            tint = tint
        )
    } else {
        null
    }
}

private fun getMenuItems(intent: SafeIntent): List<CustomTabMenuItem> =
    intent.getParcelableArrayListExtra<Parcelable>(EXTRA_MENU_ITEMS).orEmpty()
        .mapNotNull { menuItemBundle ->
            val bundle = (menuItemBundle as? Bundle)?.toSafeBundle()
            val name = bundle?.getString(KEY_MENU_ITEM_TITLE)
            val pendingIntent = bundle?.getParcelable(KEY_PENDING_INTENT) as? PendingIntent

            if (name != null && pendingIntent != null) {
                CustomTabMenuItem(
                    name = name,
                    pendingIntent = pendingIntent
                )
            } else {
                null
            }
        }
