import type { Loc } from "./loc"
import type { Operand, SSA } from "./ssa"

export const prettyPrintBlock = (block: Array<SSA>): string => {
    return block.map(prettyPrintSSA).join("\n")
}

export const prettyPrintSSA = (ssa: SSA): string => {
    let output = ""

    if ("source1" in ssa) {
        output = `${ppLoc(ssa.dest)} = ${ssa.op}(${ppOp(ssa.source)}, ${ppOp(ssa.source1)})`
    } else if ("op" in ssa) {
        output = `${ppLoc(ssa.dest)} = ${ssa.op}(${ppOp(ssa.source)})`
    } else {
        output = `${ppLoc(ssa.dest)} = ${ppOp(ssa.source)}`
    }

    return output
}

const ppOp = (op: Operand): string =>
    typeof op === "number"
        ? op.toString()
        : ppLoc(op)

const ppLoc = (loc: Loc): string => {
    let output = ''

    switch (loc.type) {
        case "register":
            output = `%${loc.name}`
            break

        case "temporary":
            output = `#${loc.name}`
            break

        case "variable":
            output = loc.name
            break
    }

    return output
}