class MazeSolver {
	constructor(startingCell, targetCell, searchedColor = [210, 180, 140], finalPathColor = [173, 216, 230]){
		this.frontier = [];
		this.explored = [];
		
		this.startingCellColor = [255, 0, 0];
		this.endingCellColor = [0, 0, 255];
		this.finalPathColor = finalPathColor;
		this.targetCell = targetCell;
		this.startingCell = startingCell;
		this.searchedColor = searchedColor;
		this.currentCell = startingCell;
		this.frontier.push(startingCell);
		this.statesExplored = 0;
	}
	
	clearState(){
		this.frontier = [];
		this.explored = [];
		this.statesExplored = 0;
	}
	
	highlightFinalPath(maze){
		let tmp = this.explored.pop();
		
		tmp.color = this.endingCellColor;
		
		tmp = tmp.parent;
		
		while(tmp != undefined){
			tmp.color = this.finalPathColor;
			
			if(tmp.parent == undefined)
				tmp.color = this.startingCellColor;

			tmp = tmp.parent;
		}
		
	    maze.updateMazeDisplay();
	}
}

class DepthFirstSolver extends MazeSolver {
	solve(maze) {
		this.currentCell.color = this.searchedColor;
		
		this.currentCell = this.frontier.pop();
		
		this.currentCell.visited = true;
		
		let moves = maze.getLegalMoves(this.currentCell);
		
		for (let i = 0; i < moves.length; i++){
			this.frontier.push(moves[i]);
			moves[i].parent = this.currentCell;
		}
		
		this.explored.push(this.currentCell);
		this.statesExplored++;
		
		if(this.currentCell.x == this.targetCell.x && this.currentCell.y == this.targetCell.y) {
			this.frontier = [];
			this.currentCell.color = this.searchedColor;
			
		}
	}
}

class BreadthFirstSolver extends MazeSolver {
	solve(maze) {
		this.currentCell.color = this.searchedColor;
		
		this.currentCell = this.frontier.shift();
		
		this.currentCell.visited = true;
		
		let moves = maze.getLegalMoves(this.currentCell);
		
		for (let i = 0; i < moves.length; i++){
			this.frontier.push(moves[i]);
			moves[i].parent = this.currentCell;
		}
		
		this.explored.push(this.currentCell);
		this.statesExplored++;
		
		if(this.currentCell.x == this.targetCell.x && this.currentCell.y == this.targetCell.y)
			this.frontier = [];
			this.currentCell.color = this.searchedColor;
	}	
}
/*
class AStarSolver extends MazeSolver {
	constructor(startingCell, targetCell, searchedColor = [210, 180, 140], finalPathColor = [173, 216, 230]) {
		super(staringCell, targetCell, searchedColor, finalPathColor);
		
		this.
	}
}*/