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import t, { isa } from "../types"

isTwoValuedSafeAwaitPattern(patternNode): boolean ->

patternNode~isa("ArrayPattern")

and patternNode.elements.length == 2

isTwoValuedSafeAwaitPath(path): boolean ->

(path.parent~isa("VariableDeclarator") and path.parent.id~isTwoValuedSafeAwaitPattern())

or (path.parent~isa("AssignmentExpression") and path.parent.left~isTwoValuedSafeAwaitPattern())

export transformAwaitExpression(path): void ->

if (path.get("argument")~isa("ArrayExpression")):

promiseDotAllCall = t.callExpression(

t.memberExpression(t.identifier("Promise"), t.identifier("all")),

[path.node.argument],

);

path.get("argument").replaceWith(promiseDotAllCall);

export transformSafeAwaitExpression(path): void ->

{ node } = path

if path.parent~isa("ExpressionStatement"):

tryStmt = t.tryStatement(t.blockStatement([t.expressionStatement(t.awaitExpression(node.argument))]))

path.parentPath.replaceWith(tryStmt)

else:

tryExpr = t.LscTryExpression(t.awaitExpression(node.argument), null, null, path~isTwoValuedSafeAwaitPath())

path.replaceWith(tryExpr)