package jp.juggler.subwaytooter.dialog

import android.annotation.SuppressLint
import android.app.Activity
import android.app.Dialog
import android.util.SparseArray
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.WindowManager
import android.widget.*
import androidx.viewpager.widget.ViewPager
import com.astuetz.PagerSlidingTabStrip
import jp.juggler.emoji.EmojiMap201709
import jp.juggler.subwaytooter.App1
import jp.juggler.subwaytooter.Pref
import jp.juggler.subwaytooter.R
import jp.juggler.subwaytooter.api.entity.CustomEmoji
import jp.juggler.subwaytooter.put
import jp.juggler.subwaytooter.view.MyViewPager
import jp.juggler.subwaytooter.view.NetworkEmojiView
import jp.juggler.util.*
import org.json.JSONObject
import java.util.*

@SuppressLint("InflateParams")
class EmojiPicker(
	private val activity : Activity,
	private val instance : String?,
	@Suppress("CanBeParameter") private val isMisskey : Boolean,
	private val onEmojiPicked : (name : String, instance : String?, bInstanceHasCustomEmoji : Boolean) -> Unit
	// onEmojiPickedのinstance引数は通常の絵文字ならnull、カスタム絵文字なら非null、
) : View.OnClickListener, ViewPager.OnPageChangeListener {
	
	companion object {
		
		internal val log = LogCategory("EmojiPicker")
		
		const val CATEGORY_RECENT = - 2
		const val CATEGORY_CUSTOM = - 1
		
		internal val tone_list = arrayOf(
			SkinTone.create("_light_skin_tone", "_tone1"),
			SkinTone.create("_medium_light_skin_tone", "_tone2"),
			SkinTone.create("_medium_skin_tone", "_tone3"),
			SkinTone.create("_medium_dark_skin_tone", "_tone4"),
			SkinTone.create("_dark_skin_tone", "_tone5")
		)
	}
	
	private val viewRoot : View
	
	private val pager_adapter : EmojiPickerPagerAdapter
	
	private val page_list = ArrayList<EmojiPickerPage>()
	
	private val pager : MyViewPager
	
	private val dialog : Dialog
	
	private val pager_strip : PagerSlidingTabStrip
	
	private val ibSkinTone : Array<ImageButton>
	
	private var selected_tone : Int = 0
	
	private val recent_list = ArrayList<EmojiItem>()
	
	private val custom_list = ArrayList<EmojiItem>()
	
	private val emoji_url_map = HashMap<String, String>()
	
	private val recent_page_idx : Int
	
	private val custom_page_idx : Int
	
	class SkinTone(val suffix_list : Array<out String>) {
		companion object {
			fun create(vararg suffix_list : String) : SkinTone {
				return SkinTone(suffix_list)
			}
		}
	}
	
	internal class EmojiItem(val name : String, val instance : String?)
	
	init {
		
		// recentをロードする
		val pref = App1.pref
		val sv = Pref.spEmojiPickerRecent(pref)
		if(sv.isNotEmpty()) {
			try {
				val array = sv.toJsonArray()
				for(i in 0 until array.length()) {
					val item = array.optJSONObject(i)
					val name = item.parseString("name")
					if(name?.isNotEmpty() == true) {
						val instance = item.parseString("instance")
						recent_list.add(EmojiItem(name, instance))
					}
				}
			} catch(ex : Throwable) {
				log.trace(ex)
			}
			
		}
		
		// create page
		this.recent_page_idx = page_list.size
		page_list.add(EmojiPickerPage(false, CATEGORY_RECENT, R.string.emoji_category_recent))
		
		
		this.custom_page_idx = page_list.size
		page_list.add(EmojiPickerPage(false, CATEGORY_CUSTOM, R.string.emoji_category_custom))
		
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_PEOPLE,
				R.string.emoji_category_people
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_NATURE,
				R.string.emoji_category_nature
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_FOODS,
				R.string.emoji_category_foods
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_ACTIVITY,
				R.string.emoji_category_activity
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_PLACES,
				R.string.emoji_category_places
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_OBJECTS,
				R.string.emoji_category_objects
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_SYMBOLS,
				R.string.emoji_category_symbols
			)
		)
		page_list.add(
			EmojiPickerPage(
				true,
				EmojiMap201709.CATEGORY_FLAGS,
				R.string.emoji_category_flags
			)
		)
		
		this.viewRoot = activity.layoutInflater.inflate(R.layout.dlg_picker_emoji, null, false)
		this.pager = viewRoot.findViewById(R.id.pager)
		this.pager_strip = viewRoot.findViewById(R.id.pager_strip)
		
		this.ibSkinTone = arrayOf(
			initSkinTone(0, viewRoot.findViewById(R.id.btnSkinTone1)),
			initSkinTone(1, viewRoot.findViewById(R.id.btnSkinTone2)),
			initSkinTone(2, viewRoot.findViewById(R.id.btnSkinTone3)),
			initSkinTone(3, viewRoot.findViewById(R.id.btnSkinTone4)),
			initSkinTone(4, viewRoot.findViewById(R.id.btnSkinTone5))
		)
		showSkinTone()
		
		this.pager_adapter = EmojiPickerPagerAdapter()
		pager.adapter = pager_adapter
		pager_strip.setViewPager(pager)
		
		pager.addOnPageChangeListener(this)
		onPageSelected(0)
		
		// カスタム絵文字をロードする
		if(instance != null && instance.isNotEmpty()) {
			setCustomEmojiList(
				App1.custom_emoji_lister.getList(instance, isMisskey = isMisskey) {
					setCustomEmojiList(it) // ロード完了時に呼ばれる
				}
			)
		}
		
		this.dialog = Dialog(activity)
		dialog.setContentView(viewRoot)
		dialog.setCancelable(true)
		dialog.setCanceledOnTouchOutside(true)
		val w = dialog.window
		w?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE)
	}
	
	private var bInstanceHasCustomEmoji = false
	
	private fun setCustomEmojiList(list : ArrayList<CustomEmoji>?) {
		if(list == null) return
		bInstanceHasCustomEmoji = true
		custom_list.clear()
		for(emoji in list) {
			if(! emoji.visible_in_picker) continue
			custom_list.add(EmojiItem(emoji.shortcode, instance))
			emoji_url_map[emoji.shortcode] = emoji.url
		}
		pager_adapter.getPageViewHolder(custom_page_idx)?.notifyDataSetChanged()
		pager_adapter.getPageViewHolder(recent_page_idx)?.notifyDataSetChanged()
	}
	
	internal fun show() {
		dialog.show()
	}
	
	override fun onPageScrollStateChanged(state : Int) {
	}
	
	override fun onPageScrolled(
		position : Int,
		positionOffset : Float,
		positionOffsetPixels : Int
	) {
	}
	
	override fun onPageSelected(position : Int) {
		try {
			val hasSkinTone = page_list[position].hasSkinTone
			val visibility = if(hasSkinTone) View.VISIBLE else View.INVISIBLE
			ibSkinTone.forEach { it.visibility = visibility }
		} catch(ex : Throwable) {
			log.trace(ex)
		}
	}
	
	private fun applySkinTone(nameArg : String) : String {
		if(selected_tone == 0) return nameArg
		
		var name = nameArg
		
		// Recentなどでは既にsuffixがついた名前が用意されている
		// suffixを除去する
		for(tone in tone_list) {
			for(suffix in tone.suffix_list) {
				if(name.endsWith(suffix)) {
					name = name.substring(0, name.length - suffix.length)
					break
				}
			}
		}
		
		// 指定したトーンのサフィックスを追加して、絵文字が存在すればその名前にする
		val tone = viewRoot.findViewById<View>(selected_tone).tag as SkinTone
		for(suffix in tone.suffix_list) {
			val new_name = name + suffix
			val info = EmojiMap201709.sShortNameToImageId[new_name]
			if(info != null) return new_name
		}
		return name
	}
	
	private fun initSkinTone(idx : Int, ib : ImageButton) : ImageButton {
		ib.tag = tone_list[idx]
		ib.setOnClickListener(this)
		return ib
	}
	
	private fun showSkinTone() {
		for(button in ibSkinTone) {
			if(selected_tone == button.id) {
				button.setImageResource(R.drawable.emj_2714_fe0f)
			} else {
				button.setImageDrawable(null)
			}
		}
	}
	
	override fun onClick(view : View) {
		val id = view.id
		selected_tone = if(selected_tone == id) 0 else id
		showSkinTone()
		pager_adapter.eachViewHolder { _, vh -> vh.reload() }
	}
	
	internal inner class EmojiPickerPage(
		val hasSkinTone : Boolean,
		category_id : Int,
		title_id : Int
	) {
		
		val title : String = activity.getString(title_id)
		
		val emoji_list = when(category_id) {
			
			CATEGORY_CUSTOM -> custom_list
			
			CATEGORY_RECENT -> ArrayList<EmojiItem>().apply {
				for(item in recent_list) {
					if(item.instance != null && item.instance != instance) continue
					add(item)
				}
			}
			
			else -> ArrayList<EmojiItem>().apply {
				EmojiMap201709.sCategoryMap.get(category_id)?.emoji_list?.forEach { name ->
					add(EmojiItem(name, null))
				}
			}
		}
	}
	
	inner class EmojiPickerPageViewHolder(activity : Activity, root : View) : BaseAdapter(),
		AdapterView.OnItemClickListener {
		
		private val gridView : GridView
		private val wh : Int
		
		private var page : EmojiPickerPage? = null
		
		init {
			this.gridView = root.findViewById(R.id.gridView)
			gridView.adapter = this
			gridView.onItemClickListener = this
			
			this.wh = (0.5f + 48f * activity.resources.displayMetrics.density).toInt()
		}
		
		internal fun onPageCreate(page : EmojiPickerPage) {
			this.page = page
		}
		
		internal fun onPageDestroy() {
		
		}
		
		internal fun reload() {
			this.notifyDataSetChanged()
		}
		
		override fun getCount() : Int {
			return page?.emoji_list?.size ?: 0
		}
		
		override fun getItem(i : Int) : Any? {
			return page?.emoji_list?.get(i)
		}
		
		override fun getItemId(i : Int) : Long {
			return 0
		}
		
		override fun getViewTypeCount() : Int {
			return 2
		}
		
		override fun getItemViewType(position : Int) : Int {
			return if(page?.emoji_list?.get(position)?.instance != null) 1 else 0
		}
		
		override fun getView(position : Int, viewOld : View?, viewGroup : ViewGroup) : View {
			val page = this.page ?: throw RuntimeException("page is not assigned")
			val view : View
			val item = page.emoji_list[position]
			if(item.instance == null) {
				if(viewOld == null) {
					view = ImageView(activity)
					val lp = AbsListView.LayoutParams(wh, wh)
					view.layoutParams = lp
				} else {
					view = viewOld
				}
				view.tag = item
				if(view is ImageView) {
					val name = if(page.hasSkinTone) {
						applySkinTone(item.name)
					} else {
						item.name
					}
					
					val info = EmojiMap201709.sShortNameToImageId[name]
					if(info != null) {
						view.setImageResource(info.image_id)
					}
				}
			} else {
				if(viewOld == null) {
					view = NetworkEmojiView(activity)
					val lp = AbsListView.LayoutParams(wh, wh)
					view.layoutParams = lp
				} else {
					view = viewOld
				}
				view.tag = item
				if(view is NetworkEmojiView) {
					view.setEmoji(emoji_url_map[item.name])
				}
			}
			
			return view
		}
		
		override fun onItemClick(adapterView : AdapterView<*>, view : View, idx : Int, l : Long) {
			
			val page = this.page ?: return
			
			val item = page.emoji_list[idx]
			var name = item.name
			if(item.instance != null && item.instance.isNotEmpty()) {
				// カスタム絵文字
				selected(name, item.instance)
			} else {
				// 普通の絵文字
				EmojiMap201709.sShortNameToImageId[name] ?: return
				
				if(page.hasSkinTone) {
					val sv = applySkinTone(name)
					if(EmojiMap201709.sShortNameToImageId[sv] != null) {
						name = sv
					}
				}
				
				selected(name, null)
			}
		}
		
	}
	
	// name はスキントーン適用済みであること
	internal fun selected(name : String, instance : String?) {
		
		dialog.dismissSafe()
		
		val pref = App1.pref
		
		// Recentをロード(他インスタンスの絵文字を含む)
		val list : ArrayList<JSONObject> = try {
			Pref.spEmojiPickerRecent(pref).toJsonArray().toObjectList()
		} catch(ignored : Throwable) {
			ArrayList()
		}
		
		// 選択された絵文字と同じ項目を除去
		// 項目が増えすぎたら減らす
		run {
			var nCount = 0
			val it = list.iterator()
			while(it.hasNext()) {
				val item = it.next()
				if(name == item.parseString("name")
					&& instance == item.parseString("instance")
				) {
					it.remove()
				} else if(++ nCount >= 256) {
					it.remove()
				}
			}
		}
		
		// 先頭に項目を追加
		list.add(0, JSONObject().apply {
			put("name", name)
			if(instance != null) put("instance", instance)
		})
		
		// 保存する
		try {
			val sv = list.toJsonArray().toString()
			App1.pref.edit().put(Pref.spEmojiPickerRecent, sv).apply()
		} catch(ignored : Throwable) {
		
		}
		
		onEmojiPicked(name, instance, bInstanceHasCustomEmoji)
	}
	
	internal inner class EmojiPickerPagerAdapter : androidx.viewpager.widget.PagerAdapter() {
		
		private val inflater : LayoutInflater
		private val holder_list = SparseArray<EmojiPickerPageViewHolder>()
		
		init {
			this.inflater = activity.layoutInflater
		}
		
		override fun getCount() : Int {
			return page_list.size
		}
		
		private fun Int.validPage() = this >= 0 && this < page_list.size
		
		private fun getPage(idx : Int) : EmojiPickerPage? {
			return if(idx.validPage()) page_list[idx] else null
		}
		
		fun getPageViewHolder(idx : Int) : EmojiPickerPageViewHolder? {
			return if(idx.validPage()) holder_list.get(idx) else null
		}
		
		inline fun eachViewHolder(block : (Int, EmojiPickerPageViewHolder) -> Unit) {
			for(i in 0 until page_list.size) {
				val vh = holder_list.get(i) ?: continue
				block(i, vh)
			}
		}
		
		override fun getPageTitle(page_idx : Int) : CharSequence? {
			return getPage(page_idx)?.title
		}
		
		override fun isViewFromObject(view : View, obj : Any) : Boolean {
			return view === obj
		}
		
		override fun instantiateItem(container : ViewGroup, page_idx : Int) : Any {
			val root = inflater.inflate(R.layout.page_emoji_picker, container, false)
			container.addView(root, 0)
			
			val page = page_list[page_idx]
			val holder = EmojiPickerPageViewHolder(activity, root)
			//
			holder_list.put(page_idx, holder)
			//
			holder.onPageCreate(page)
			
			return root
		}
		
		override fun destroyItem(container : ViewGroup, page_idx : Int, obj : Any) {
			if(obj is View) {
				container.removeView(obj)
				//
				val holder = holder_list.get(page_idx)
				holder_list.remove(page_idx)
				holder?.onPageDestroy()
			}
		}
	}
	
}