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'use strict';
const { Core } = require('./core.js');
const {
DAT,
MOV, ADD, SUB, CMP, SLT,
JMP, JMZ, JMN, DJN, SPL,
} = require('./instruction.js');
class Warrior {
constructor(start) {
this.queue = [start];
}
isDead() { return (this.queue.length === 0); }
append(heads) {
this.queue.push(...heads);
}
next() {
const pc = this.queue[0];
this.queue = this.queue.slice(1);
return pc;
}
peek() {
const pc = this.queue[0];
return pc;
}
};
class RedcodeVm {
constructor(coresize, warriors) {
this.core = new Core(coresize);
this.warriors = this.core.initialize(warriors)
.map(start => new Warrior(start));
}
step() {
let running = 0;
for (let i=0; i<this.warriors.length; i++) {
const warrior = this.warriors[i];
if (warrior.isDead()) {
continue;
} else {
running += 1;
}
const pc = warrior.next();
const ins = this.core.data[pc];
let next;
console.log(i, this.core.pretty(ins));
switch(ins.opcode) {
case 'DAT':
next = DAT(this.core, pc, ins);
break;
case 'MOV':
next = MOV(this.core, pc, ins);
break;
case 'ADD':
next = ADD(this.core, pc, ins);
break;
case 'SUB':
next = SUB(this.core, pc, ins);
break;
case 'CMP':
next = CMP(this.core, pc, ins);
break;
case 'SLT':
next = SLT(this.core, pc, ins);
break;
case 'JMP':
next = JMP(this.core, pc, ins);
break;
case 'JMZ':
next = JMZ(this.core, pc, ins);
break;
case 'JMN':
next = JMN(this.core, pc, ins);
break;
case 'DJN':
next = DJN(this.core, pc, ins);
break;
case 'SPL':
next = SPL(this.core, pc, ins);
break;
default:
throw `core corruption: bad instruction ${ins}`
}
warrior.append(next);
}
return running;
}
warriorsAlive() {
return this.warriors.reduce(
(count, warrior) => warrior.isDead() ? count : count+1,
0
);
}
run(maxSteps) {
let steps = 0;
while(this.warriorsAlive() > 1 && steps < maxSteps) {
this.step();
steps += 1;
}
return this.warriors.map(
(w, i) => ({ warrior: i, alive: !w.isDead() })
);
}
};
exports.RedcodeVm = RedcodeVm;
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