/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settingslib.widget

import android.content.Context
import android.text.TextUtils
import android.util.AttributeSet
import android.view.View
import androidx.preference.Preference
import androidx.preference.PreferenceViewHolder
import com.android.settingslib.widget.preference.topintro.R

open class TopIntroPreference
@JvmOverloads
constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0,
    defStyleRes: Int = 0,
) : Preference(context, attrs, defStyleAttr, defStyleRes),
    GroupSectionDividerMixin,
    OnScreenWidgetMixin {

    private var isCollapsable: Boolean = false
    private var minLines: Int = 2
    private var hyperlinkListener: View.OnClickListener? = null
    private var learnMoreListener: View.OnClickListener? = null
    private var learnMoreText: CharSequence? = null

    init {
        layoutResource = R.layout.settingslib_expressive_top_intro
        initAttributes(context, attrs, defStyleAttr)

        isSelectable = false
        isPersistent = false
    }

    private fun initAttributes(context: Context, attrs: AttributeSet?, defStyleAttr: Int) {
        context.obtainStyledAttributes(attrs, COLLAPSABLE_TEXT_VIEW_ATTRS, defStyleAttr, 0).apply {
            isCollapsable = getBoolean(IS_COLLAPSABLE, DEFAULT_COLLAPSABLE)
            minLines =
                getInt(MIN_LINES, if (isCollapsable) DEFAULT_MIN_LINES else DEFAULT_MAX_LINES)
                    .coerceIn(1, DEFAULT_MAX_LINES)
            recycle()
        }
    }

    override fun onBindViewHolder(holder: PreferenceViewHolder) {
        super.onBindViewHolder(holder)
        holder.isDividerAllowedAbove = false
        holder.isDividerAllowedBelow = false

        (holder.findViewById(R.id.collapsable_text_view) as? CollapsableTextView)?.apply {
            setCollapsable(isCollapsable)
            setMinLines(minLines)
            visibility = if (title.isNullOrEmpty()) View.GONE else View.VISIBLE
            title?.let { setText(it.toString()) }
            setHyperlinkListener(hyperlinkListener)
            setLearnMoreText(learnMoreText)
            setLearnMoreAction(learnMoreListener)
        }
    }

    /**
     * Sets whether the text view is collapsable.
     *
     * @param collapsable True if the text view should be collapsable, false otherwise.
     */
    fun setCollapsable(collapsable: Boolean) {
        isCollapsable = collapsable
        minLines = if (isCollapsable) DEFAULT_MIN_LINES else DEFAULT_MAX_LINES
        notifyChanged()
    }

    /**
     * Sets the minimum number of lines to display when collapsed.
     *
     * @param lines The minimum number of lines.
     */
    fun setMinLines(lines: Int) {
        minLines = lines.coerceIn(1, DEFAULT_MAX_LINES)
        notifyChanged()
    }

    /**
     * Sets the action when clicking on the hyperlink in the text.
     *
     * @param listener The click listener for hyperlink.
     */
    fun setHyperlinkListener(listener: View.OnClickListener) {
        if (hyperlinkListener != listener) {
            hyperlinkListener = listener
            notifyChanged()
        }
    }

    /**
     * Sets the action when clicking on the learn more view.
     *
     * @param listener The click listener for learn more.
     */
    fun setLearnMoreAction(listener: View.OnClickListener) {
        if (learnMoreListener != listener) {
            learnMoreListener = listener
            notifyChanged()
        }
    }

    /**
     * Sets the text of learn more view.
     *
     * @param text The text of learn more.
     */
    fun setLearnMoreText(text: CharSequence) {
        if (!TextUtils.equals(learnMoreText, text)) {
            learnMoreText = text
            notifyChanged()
        }
    }

    companion object {
        private const val DEFAULT_MAX_LINES = 50
        private const val DEFAULT_MIN_LINES = 2
        private const val DEFAULT_COLLAPSABLE = false

        private val COLLAPSABLE_TEXT_VIEW_ATTRS =
            com.android.settingslib.widget.theme.R.styleable.CollapsableTextView
        private val MIN_LINES =
            com.android.settingslib.widget.theme.R.styleable.CollapsableTextView_android_minLines
        private val IS_COLLAPSABLE =
            com.android.settingslib.widget.theme.R.styleable.CollapsableTextView_isCollapsable
    }
}