#ifndef ETHSERP_OPCODES
#define ETHSERP_OPCODES

#include <stdio.h>
#include <iostream>
#include <vector>
#include <map>

class Mapping {
    public:
        Mapping(std::string Op, int Opcode, int In, int Out) {
            op = Op;
            opcode = Opcode;
            in = In;
            out = Out;
        }
        std::string op;
        int opcode;
        int in;
        int out;
};

Mapping mapping[] = {
    Mapping("STOP", 0x00, 0, 0),
    Mapping("ADD", 0x01, 2, 1),
    Mapping("MUL", 0x02, 2, 1),
    Mapping("SUB", 0x03, 2, 1),
    Mapping("DIV", 0x04, 2, 1),
    Mapping("SDIV", 0x05, 2, 1),
    Mapping("MOD", 0x06, 2, 1),
    Mapping("SMOD", 0x07, 2, 1),
    Mapping("EXP", 0x08, 2, 1),
    Mapping("NEG", 0x09, 1, 1),
    Mapping("LT", 0x0a, 2, 1),
    Mapping("GT", 0x0b, 2, 1),
    Mapping("SLT", 0x0c, 2, 1),
    Mapping("SGT", 0x0d, 2, 1),
    Mapping("EQ", 0x0e, 2, 1),
    Mapping("NOT", 0x0f, 1, 1),
    Mapping("AND", 0x10, 2, 1),
    Mapping("OR", 0x11, 2, 1),
    Mapping("XOR", 0x12, 2, 1),
    Mapping("BYTE", 0x13, 2, 1),
    Mapping("ADDMOD", 0x14, 3, 1),
    Mapping("MULMOD", 0x15, 3, 1),
    Mapping("SHA3", 0x20, 2, 1),
    Mapping("ADDRESS", 0x30, 0, 1),
    Mapping("BALANCE", 0x31, 1, 1),
    Mapping("ORIGIN", 0x32, 0, 1),
    Mapping("CALLER", 0x33, 0, 1),
    Mapping("CALLVALUE", 0x34, 0, 1),
    Mapping("CALLDATALOAD", 0x35, 1, 1),
    Mapping("CALLDATASIZE", 0x36, 0, 1),
    Mapping("CALLDATACOPY", 0x37, 3, 1),
    Mapping("CODESIZE", 0x38, 0, 1),
    Mapping("CODECOPY", 0x39, 3, 1),
    Mapping("GASPRICE", 0x3a, 0, 1),
    Mapping("PREVHASH", 0x40, 0, 1),
    Mapping("COINBASE", 0x41, 0, 1),
    Mapping("TIMESTAMP", 0x42, 0, 1),
    Mapping("NUMBER", 0x43, 0, 1),
    Mapping("DIFFICULTY", 0x44, 0, 1),
    Mapping("GASLIMIT", 0x45, 0, 1),
    Mapping("POP", 0x50, 1, 0),
    Mapping("MLOAD", 0x53, 1, 1),
    Mapping("MSTORE", 0x54, 2, 0),
    Mapping("MSTORE8", 0x55, 2, 0),
    Mapping("SLOAD", 0x56, 1, 1),
    Mapping("SSTORE", 0x57, 2, 0),
    Mapping("JUMP", 0x58, 1, 0),
    Mapping("JUMPI", 0x59, 2, 0),
    Mapping("PC", 0x5a, 0, 1),
    Mapping("MSIZE", 0x5b, 0, 1),
    Mapping("GAS", 0x5c, 0, 1),
    Mapping("CREATE", 0xf0, 3, 1),
    Mapping("CALL", 0xf1, 7, 1),
    Mapping("RETURN", 0xf2, 2, 0),
    Mapping("POST", 0xf3, 5, 0),
    Mapping("CALL_STATELESS", 0xf4, 7, 1),
    Mapping("SUICIDE", 0xff, 1, 0),
    Mapping("---END---", 0x00, 0, 0),
};

std::map<std::string, std::vector<int> > opcodes;
std::map<int, std::string> reverseOpcodes;

// Fetches everything EXCEPT PUSH1..32
std::pair<std::string, std::vector<int> > _opdata(std::string ops, int opi) {
    if (!opcodes.size()) {
        int i = 0;
        while (mapping[i].op != "---END---") {
            Mapping mi = mapping[i];
            opcodes[mi.op] = triple(mi.opcode, mi.in, mi.out);
            i++;
        }
        for (i = 1; i <= 16; i++) {
            opcodes["DUP"+unsignedToDecimal(i)] = triple(0x7f + i, i, i+1);
            opcodes["SWAP"+unsignedToDecimal(i)] = triple(0x8f + i, i+1, i+1);
        }
        for (std::map<std::string, std::vector<int> >::iterator it=opcodes.begin();
             it != opcodes.end();
             it++) {
            reverseOpcodes[(*it).second[0]] = (*it).first;
        }
    }
    std::string op;
    std::vector<int> opdata;
    op = reverseOpcodes.count(opi) ? reverseOpcodes[opi] : "";
    opdata = opcodes.count(ops) ? opcodes[ops] : triple(-1, -1, -1);
    return std::pair<std::string, std::vector<int> >(op, opdata);
}

int opcode(std::string op) {
	return _opdata(op, -1).second[0];
}

int opinputs(std::string op) {
	return _opdata(op, -1).second[1];
}

int opoutputs(std::string op) {
	return _opdata(op, -1).second[2];
}

std::string op(int opcode) {
	return _opdata("", opcode).first;
}

#endif