wat.res

type applicationLoadBalancerEvent = {
    path: string,
    httpMethod: string,
    queryStringParameters: option<string>,
    body: option<string>
}

type header = (string, string)

type headers = list<header>

type httpResponse = {
    statusCode: int,
    isBase64Encoded: bool,
    headers: headers,
    body: option<string>
}

let corsHeaders = () =>
    list{
        ("access-control-allow-origin", "*"),
        ("access-control-allow-methods", "POST, GET, OPTIONS, DELETE"),
        ("access-control-request-headers", "content-type,x-idempotency-key"), 
        ("access-control-allow-headers", "content-type,x-idempotency-key")
    }

let corsResponse = () : httpResponse => {
    let res = {
        statusCode: 200,
        isBase64Encoded: false,
        headers: corsHeaders(),
        body: None
    }
    res
}

let goodResponse = (bodyString) =>
    {
        statusCode: 200,
        isBase64Encoded: false,
        headers: corsHeaders(),
        body: Some(bodyString)
    }

let requestToResponse = (path, httpMethod) : httpResponse => {
    if httpMethod == "OPTIONS" {
        corsResponse(())
    }
    switch path {
        | "/ping" =>
            goodResponse("dat ping")
        | "/token" =>
            goodResponse("dat token")
        | _ =>
            goodResponse("no clue???")
    }
}

let handler = ({ path, httpMethod }, context): httpResponse =>
    requestToResponse(path, httpMethod)

let isMain = %raw(`function isMain() {
    if(require.main === module) {
        return true
    }
    return false
}
`);

if(isMain() == true) {
    let result = handler({ path: "/ping", httpMethod: "GET", queryStringParameters: None, body: None}, Js.Dict.empty())
    Js.log(result)
}