package com.anas4tech.noteable

import android.appwidget.AppWidgetManager
import android.content.Context
import android.content.Intent
import android.net.Uri
import android.widget.RemoteViews
import android.widget.RemoteViewsService

/** Supplies one row per paragraph for vertically scrollable selected-note widget content. */
class SelectedNoteLinesRemoteViewsService : RemoteViewsService() {
    override fun onGetViewFactory(intent: Intent): RemoteViewsFactory {
        val widgetId = intent.getIntExtra(
            AppWidgetManager.EXTRA_APPWIDGET_ID,
            AppWidgetManager.INVALID_APPWIDGET_ID
        )
        return SelectedNoteLinesFactory(applicationContext, widgetId)
    }
}

private class SelectedNoteLinesFactory(
    private val context: Context,
    private val widgetId: Int
) : RemoteViewsService.RemoteViewsFactory {

    private var lines: List<String> = emptyList()
    private var noteId: Int = -1

    override fun onCreate() = Unit

    override fun onDataSetChanged() {
        val prefs = context.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
        noteId = prefs.getInt("selected_note_${widgetId}_id", -1)
        val description = prefs.getString(
            "selected_note_${widgetId}_description",
            ""
        ).orEmpty()

        lines = if (description.isEmpty()) {
            emptyList()
        } else {
            description.split('\n').map { line ->
                // Keep empty paragraphs visible in the widget.
                if (line.isEmpty()) "\u00A0" else line
            }
        }
    }

    override fun onDestroy() {
        lines = emptyList()
    }

    override fun getCount(): Int = lines.size

    override fun getViewAt(position: Int): RemoteViews? {
        val line = lines.getOrNull(position) ?: return null
        val prefs = context.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
        val palette = WidgetTheme.palette(context, prefs)

        return RemoteViews(context.packageName, R.layout.selected_note_widget_line).apply {
            setTextViewText(R.id.selected_note_line_text, line)
            if (!palette.followsSystem) {
                setTextColor(R.id.selected_note_line_text, palette.secondaryText)
            }
            setOnClickFillInIntent(
                R.id.selected_note_line,
                Intent().apply {
                    action = WidgetItemClickReceiver.ACTION_OPEN_NOTE
                    putExtra(WidgetItemClickReceiver.EXTRA_NOTE_ID, noteId)
                    data = Uri.parse("noteable://open-note/$noteId?source=widget_view")
                }
            )
        }
    }

    override fun getLoadingView(): RemoteViews? = null

    override fun getViewTypeCount(): Int = 1

    override fun getItemId(position: Int): Long = position.toLong()

    override fun hasStableIds(): Boolean = false

    private companion object {
        const val PREFERENCES = "HomeWidgetPreferences"
    }
}