using System.Collections;
using System.Collections.Generic;
using UnityEngine;

using BoardState = System.Collections.Generic.List<System.Collections.Generic.List<TileInfo>>;
using TileList = System.Collections.Generic.List<TileInfo>;

using UnityEngine.UI;
using TMPro;

public class GameBoardRender : MonoBehaviour {
	// Auto assign so that I can copy stuff around like a shmuk - Texel
	private GameBoard board;

	public TMPro.TextMeshPro ScoreText;
	public TMPro.TextMeshPro ComboText;
  public TextMeshPro NickNameText;

	[Header("Positioning")]
	public Transform basePoint;
	public float width, height;

	[Header("Extra")]
	public TileRender place1;
	public TileRender place2;
	public TileRender place3, place4; // Next tile display

	// Dramatically slow falls in combo mode
	public float tileSpeed => board.Combo > 0 ? 15 : 20;

	GameObject tilePrefab => GameBoardInstance.instance.tilePrefab;

	void Start() {
		// Auto-assign off same object - Texel
		board = GetComponent<GameBoard>();
	}


	float comboTime = 0f;
	float comboDuration = 3f;
	public void SetComboLevel(int num) {
		if (!ComboText) return;
		if (num == 0) return;

		comboTime = Time.time;
		if (num == 1)
			ComboText.text = "NICE";
		else
			ComboText.text = string.Format("{0}x COMBO", num);
	}

	public void SetScoreValue(int value) {
		if (ScoreText) ScoreText.text = string.Format("{0:D6}", value);
	}

	Transform corner;
	private void Awake() {
		var pos = basePoint.position;
		var rowOffset = basePoint.right * width;
		var columnOffset = basePoint.up * height;
		pos += rowOffset * 0.5f + columnOffset * 0.5f;
		for (var i = 0; i < GameBoard.COLUMN; ++i) {
			var t = new GameObject("column" + i.ToString()).transform;
			t.SetParent(basePoint);
			t.position = pos + rowOffset * i;
			t.localRotation = Quaternion.identity;
			t.localScale = Vector3.one;
		}

		corner = new GameObject("corner").transform;
		corner.SetParent(basePoint.GetChild(0));
		corner.localPosition = Vector3.zero;
		corner.localRotation = Quaternion.identity;
		corner.localScale = Vector3.one;
		corner.SetParent(transform, true);

		place1 = Instantiate(GameBoardInstance.instance.tilePrefab, corner).GetComponent<TileRender>();
		place2 = Instantiate(GameBoardInstance.instance.tilePrefab, corner).GetComponent<TileRender>();

		place3 = Instantiate(GameBoardInstance.instance.tilePrefab, corner).GetComponent<TileRender>();
		place4 = Instantiate(GameBoardInstance.instance.tilePrefab, corner).GetComponent<TileRender>();

		place1.transform.localPosition = Vector3.zero;
		place2.transform.localPosition = Vector3.zero;
		place3.transform.localPosition = Vector3.zero;
		place4.transform.localPosition = Vector3.zero;
	}

	public void Render(BoardState state) {
		if (Time.time + comboDuration > comboTime) {
			if (ComboText) ComboText.text = "";
		}

		// render
		for (var i = 0; i < state.Count; ++i) {
			var root = basePoint.GetChild(i);
			var t = state[i];
			RebuildStack(root, t);
			DrawStack(root, t);
		}
	}

  public void RenderName(){
    if (NetworkManager.inRoom && board.authorityID != -1){
      var player = NetworkManager.net.CurrentRoom.GetPlayer(board.authorityID);
      NickNameText.text = player.NickName;
    }
  }

	// Spawn a fading 'ghost' of a tile as an activator for the cool effect
	public void Ghost(TileInfo tile, (int x, int y) ghostPos) {
		//var tileGo = Instantiate<GameObject>(tilePrefab,corner);
		var tileGo = Instantiate(tilePrefab, corner);
		var tr = tileGo.GetComponent<TileRender>();
		tr.renderer.sortingOrder = 3; // Draw infront of the others!
		tileGo.transform.localPosition = new Vector3(ghostPos.x * width, ghostPos.y * height);
		//Debug.Log("Ghosting", tr.gameObject);
		//Debug.Break();
		StartCoroutine(HandleGhost(tr,tile.color));
	}

	public void Crumble(TileInfo tile, (int x, int y) crumblePos) {
		// Copypastecopypastecopypast - Texel
		var tileGo = Instantiate(tilePrefab, corner);
		var tr = tileGo.GetComponent<TileRender>();
		tr.renderer.sortingOrder = 3; // Draw infront of the others!
		tileGo.transform.localPosition = new Vector3(crumblePos.x * width, crumblePos.y * height);

		StartCoroutine(HandleCrumble(tr, tile.color, tile.kind));
	}

	// Float up and fade out
	IEnumerator HandleGhost(TileRender tr, TileColor color) {
		float opacity = 1f;
		while (opacity > 0f) {
			opacity -= Time.deltaTime;
			// Move up about one unit over a second?
			tr.transform.localPosition += new Vector3(0, Time.deltaTime, 0);

			tr.SetDisplay(color, TileKind.Activator);
			tr.renderer.color = new Color(1, 1, 1, opacity);
			yield return null;
		}
		Destroy(tr.gameObject);
	}

	// Fall down and fade out
	IEnumerator HandleCrumble(TileRender tr, TileColor color, TileKind kind) {
		float opacity = 2f;
		float sideVel = Random.value - 0.5f;
		float fallSpeed = 0.9f + (Random.value * 0.3f);

		while (opacity > 0f) {
			opacity -= Time.deltaTime;
			tr.transform.localPosition += new Vector3(sideVel * Time.deltaTime, fallSpeed * -Time.deltaTime, 0);

			tr.SetDisplay(color, kind);
			tr.renderer.color = new Color(1, 1, 1, opacity);
			yield return null;
		}
		Destroy(tr.gameObject);
	}

  public void RenderPlacement(TileInfo left, TileInfo right, (int x, int y) leftPosition, (int x, int y) rightPosition){
    place1.transform.localPosition = new Vector3(leftPosition.x * width, leftPosition.y * height);
    place2.transform.localPosition = new Vector3(rightPosition.x * width, rightPosition.y * height);

		place3.transform.localPosition = new Vector3(board.nextRootX * width, board.nextRootY * height);
		place4.transform.localPosition = new Vector3(board.nextRootX * width, (board.nextRootY - 1f) * height);

		var np = board.nextPair;
		place3.SetDisplay(np.left.color, np.left.kind);
		place4.SetDisplay(np.right.color, np.right.kind);

    place1.SetDisplay(left, left.color, left.kind);
    place2.SetDisplay(right, right.color, right.kind);
  }

  void RebuildStack(Transform root, TileList tiles){
    var spawnOffset = 0f;
    var maxHeight = height * (GameBoard.ROW + 1);

    for(var i = 0; i < tiles.Count; ++i){
      var tile = tiles[i];
      var tilestate = tile.kind;
      var tileinstance = 0;

      var ttransform = i < root.childCount ? root.GetChild(i) : null;
      var trender = ttransform != null ? ttransform.GetComponent<TileRender>() : null;

      // new tiles, place them at the top
      if (ttransform == null){
        var t = Instantiate(tilePrefab, root).transform;
        t.localPosition = new Vector3(0f, Mathf.Max(maxHeight, spawnOffset));
        t.localRotation = Quaternion.identity;
        t.localScale = Vector3.one;

        t.GetComponent<TileRender>().id = tileinstance;

        spawnOffset = t.localPosition.y + height;
      } 
      // not in sync, stop destroying
      else if (tileinstance != trender.id){
        ttransform.parent = null;
        Destroy(ttransform.gameObject);
        i--;
      }
      // in sync, continue
      else {
        spawnOffset = ttransform.localPosition.y + height;
      }
    }

    // any excess tiles are removed
    while(tiles.Count < root.childCount){
      var child = root.GetChild(root.childCount - 1);
      child.parent = null;
      Destroy(child.gameObject);
    }

  }

  private static Dictionary<TileColor, Color> colorConversion = new Dictionary<TileColor, Color>(){
    { TileColor.Blue, Color.blue },
    { TileColor.Green, Color.green },
    { TileColor.Red, Color.red },
    { TileColor.Yellow, Color.yellow}
  };

  void DrawStack(Transform root, TileList tiles){
    var dest = 0f;
    var speed = Time.deltaTime * tileSpeed;

    for(var i = 0; i < tiles.Count; ++i){
      var tile = tiles[i];
      var tilekind = tile.kind;
      var tilecolor = tile.color;
      var ttransform = root.GetChild(i);
      var trender = ttransform.GetComponent<TileRender>();
      
      if (tilekind != TileKind.Air){
        // pos
        var pos = ttransform.localPosition.y;
        ttransform.localPosition = new Vector3(0f, Mathf.MoveTowards(pos, dest, speed));
        dest += height;

        // color
        ttransform.gameObject.SetActive(true);
        trender.SetDisplay(tile, tilecolor, tilekind);

        // counter
        trender.SetCounter(tilekind == TileKind.Trash ? tile.counter.ToString() : "");
      } else {
        ttransform.gameObject.SetActive(false);
      }


    }
  }


}