import Builder from '../Builder.js'

import * as assert from '../assert.js'

function makeInstance(func) {

const builder = new Builder()

.Type()

.Func(["i32", "i32"], "i32")

.Func(["i32"], "i32")

.End()

.Import()

.Table("imp", "table", {initial: 20, element: "funcref"})

.Function("imp", "func", { params: ["i32"], ret: "i32" })

.End()

.Function().End()

.Export()

.Function("foo")

.Function("bar")

.End()

.Code()

.Function("foo", 0 /*['i32', 'i32'] => 'i32'*/)

.GetLocal(1) // parameter to call

.GetLocal(0) // call index

.CallIndirect(1, 0) // calling function of type ['i32'] => 'i32'

.Return()

.End()

.Function("bar", 1 /*['i32'] => 'i32'*/)

.GetLocal(0)

.Call(0)

.Return()

.End()

.End();

const bin = builder.WebAssembly().get();

const module = new WebAssembly.Module(bin);

const table = new WebAssembly.Table({initial: 20, element: "funcref"});

return {instance: new WebAssembly.Instance(module, {imp: {table, func}}), table};

}

{

let i;

function func(x) {

if (x !== i)

throw new Error("Bad argument");

return x + 44;

}

const {instance, table} = makeInstance(func);

const exports = instance.exports;

const foo = exports.foo;

table.set(0, exports.bar);

assert.eq(table.get(0), exports.bar);

for (i = 0; i < 10000; i++) {

if (foo(0, i) !== i + 44)

throw new Error("Bad call indirect");

}

}