module clox.chunk;

import std.algorithm.searching;

import clox.memory;
import clox.value;
import clox.container.dynarray;

struct OpColour{
	string r, g, b;
}

enum OpCode : ubyte{
	@(OpColour("200", "200", "100")) Constant,
	@(OpColour("255", "200", "100")) Nil,
	@(OpColour("255", "200", "100")) True,
	@(OpColour("255", "200", "100")) False,

	@(OpColour("000", "200", "100")) Pop,
	@(OpColour("060", "200", "150")) GetLocal,
	@(OpColour("000", "200", "150")) GetGlobal,
	@(OpColour("000", "200", "150")) DefineGlobal,
	@(OpColour("060", "200", "150")) SetLocal,
	@(OpColour("000", "200", "150")) SetGlobal,

	@(OpColour("255", "100", "100")) Equal,
	@(OpColour("255", "100", "100")) Greater,
	@(OpColour("255", "100", "100")) Less,
	@(OpColour("255", "100", "100")) NotEqual,
	@(OpColour("255", "100", "100")) GreaterEqual,
	@(OpColour("255", "100", "100")) LessEqual,

	@(OpColour("100", "100", "255")) Add,
	@(OpColour("100", "100", "255")) Subtract,
	@(OpColour("100", "100", "255")) Multiply,
	@(OpColour("100", "100", "255")) Divide,

	@(OpColour("200", "100", "100")) Not,
	@(OpColour("100", "100", "200")) Negate,
	@(OpColour("000", "200", "100")) Print,
	@(OpColour("000", "200", "100")) Return,
}

struct Chunk{
	DynArray!ubyte code;
	DynArray!uint lines;
	DynArray!Value constants;
	void initialise(){
		code.initialise();
		lines.initialise();
		constants.initialise();
	}
	void write(in ubyte[] bytes, uint line = 0){
		foreach(b; bytes)
			write(b, line);
	}
	void write(ubyte b, uint line = 0){
		code ~= b;
		lines ~= line;
	}
	size_t addConstant(Value value){
		long index = constants[].countUntil(value);
		if(index >= 0)
			return index;
		constants ~= value;
		return constants.count - 1;
	}
	void free(){
		code.free();
		lines.free();
		constants.free();
		initialise();
	}
}