import * as route from 'route'

export async function get<T>(path: string): Promise<T> {
    return await request('GET', path, null, JSON.parse)
}

export async function post<T>(path: string, body: any = ''): Promise<T> {
    return await request('POST', path, body, JSON.parse)
}

export async function post_(path: string, body: any = ''): Promise<void> {
    return await request('POST', path, body, _ => {})
}

export async function put<T>(path: string, body: any = ''): Promise<T> {
    return await request('PUT', path, body, JSON.parse)
}

export async function put_(path: string, body: any = ''): Promise<void> {
    return await request('PUT', path, body, _ => {})
}

export async function del<T>(path: string, body: any = ''): Promise<T> {
    return await request('DELETE', path, body, JSON.parse)
}

export async function del_(path: string, body: any = ''): Promise<void> {
    return await request('DELETE', path, body, _ => {})
}

interface Message {
    message: string
}

function request<T>(verb: string, path: string, body: any, f: (payload: string) => T): Promise<T> {
    return new Promise((resolve, reject) => {
        const xmlHttp = new XMLHttpRequest()
        xmlHttp.onreadystatechange = function() {
            if (xmlHttp.readyState == 4) {
                if (xmlHttp.status == 200) {
                    try {
                        resolve(f(xmlHttp.responseText))
                    } catch {
                        reject({ message: `Erreur de lecture de la réponse de requête réussie: ${xmlHttp.responseText}`})
                    }
                } else {
                    // Redirect to /login when receiving a forbidden outside of /login
                    if (xmlHttp.status == 403 && window.location.pathname !== '/login') {
                        route.push(route.login)
                    } else {
                        try {
                            reject(JSON.parse(xmlHttp.responseText) as Message)
                        } catch {
                            reject({ message: `Erreur de lecture de la réponse de requête échouée: ${xmlHttp.responseText}`})
                        }
                    }
                }
            }
        }
        xmlHttp.open(verb, path, true);
        xmlHttp.send(body)
    })
}