#ifndef CHIP8_INSTRUCTION_HANDLER_H
#define CHIP8_INSTRUCTION_HANDLER_H

#include <map>
#include "chip8.h"
#include "instruction.h"

/**
 * The InstructionHandler class holds the Chip8 instruction set and all handlers
 */
class InstructionHandler {
private:
    /**
     * The typedef for the handler functions
     */
    typedef void (*Handler)(Chip8&, Instruction);

    /**
     * Map which stores all instructions with their handler
     */
    std::map<unsigned short, Handler> handlers = {};

    /**
     * Handles Chip8 instruction 0x0000, as well as 0x00E0 and 0x00EE
     */
    static void handle0000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x1000
     */
    static void handle1000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x2000
     */
    static void handle2000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x3000
     */
    static void handle3000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x4000
     */
    static void handle4000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x5000
     */
    static void handle5000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x6000
     */
    static void handle6000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x7000
     */
    static void handle7000(Chip8&, Instruction);

    /**
     * Handles Chip8 instruction 0x8000
     */
    static void handle8000(Chip8&, Instruction);
public:
    InstructionHandler();

    /**
     * Attempts to handle a chip8 instruction
     * @param instructionNumber the 16-bit value to determine the instruction
     * @param chip8 the Chip8 instance
     * @param instruction the Instruction instance
     */
    void handleInstruction(unsigned short instructionNumber, Chip8& chip8, Instruction instruction);
};
#endif //CHIP8_INSTRUCTION_HANDLER_H