/* =========================
   DNS CACHE (mit TTL)
========================= */

const dnsCache = {}

async function getDNS(domain){

    const now = Date.now()
    const TTL = 30000 // 30 Sekunden

    if(dnsCache[domain] && (now - dnsCache[domain].time < TTL)){
        return dnsCache[domain].ips
    }

    try{

        const res = await api(API + "/dns/" + domain)
        const ips = res.ips || []

        dnsCache[domain] = {
            ips: ips,
            time: now
        }

        return ips

    }catch(e){

        dnsCache[domain] = {
            ips: [],
            time: now
        }

        return []

    }

}


/* =========================
   DOMAINS + SUBDOMAINS
========================= */

window.loadDomains = async function(){

    const domains = await api(API + "/domains")
    const subs = await api(API + "/subdomains")

    const table = document.getElementById("domains")
    table.innerHTML = ""

    for(const d of domains){

        const tr = document.createElement("tr")

        // Subdomains Liste
        const sublist = subs
        .filter(s => s.domain_id === d.id)
        .map(s => `
            <div class="subdomain">
                ↳ ${s.subdomain}.${s.domain_name}
                <span id="subdns-${s.id}">...</span>
                <span id="subserver-${s.id}" class="serverlink"></span>

                <button onclick='openSubEdit(${JSON.stringify(s)})'>Edit</button>
                <button onclick="deleteSub(${s.id})">Delete</button>
            </div>
        `).join("")

        tr.innerHTML = `
        <td>
            ${d.domain_name}
            ${sublist}
        </td>

        <td><span class="provider">${d.provider || ""}</span></td>
        <td>${d.ip_address || ""}</td>
        <td>${d.resource_name || ""}</td>
        <td id="dns-${d.id}">...</td>
        <td>${d.yearly_cost || ""}</td>

        <td>
            <button onclick='openDomainEdit(${JSON.stringify(d)})'>Edit</button>
            <button onclick="deleteDomain(${d.id})">Delete</button>
            <button onclick="openSubCreate(${d.id})">+ Subdomain</button>
        </td>
        `

        table.appendChild(tr)

        /* =========================
           SERVER ZUORDNUNG SUBS
        ========================= */

        const resources = window.resources || []

        subs.forEach(s => {

            const server = resources.find(r =>
                Array.isArray(r.ips) &&
                r.ips.some(ip => ip.ip === s.ip_address)
            )

            if(server){

                const el = document.getElementById("subserver-"+s.id)
                if(el){
                    el.innerText = " → " + server.name
                }

            }

        })


        /* =========================
           DNS CHECK DOMAIN
        ========================= */

        try{

            const ips = await getDNS(d.domain_name)

            let status = "❌"

            if(ips.length){

                if(d.ip_address && ips.includes(d.ip_address)){
                    status = "✅ " + ips.join(", ")
                }else{
                    status = "⚠ " + ips.join(", ")
                }

            }

            document.getElementById("dns-"+d.id).innerHTML = status

        }catch(e){

            document.getElementById("dns-"+d.id).innerHTML = "❌"

        }


        /* =========================
           DNS CHECK SUBDOMAINS
        ========================= */

        subs
        .filter(s => s.domain_id === d.id)
        .forEach(async s => {

            const full = s.subdomain + "." + s.domain_name

            try{

                const ips = await getDNS(full)

                let status = "❌"

                if(ips.length){

                    if(s.ip_address && ips.includes(s.ip_address)){
                        status = "✅ " + ips.join(", ")
                    }else{
                        status = "⚠ " + ips.join(", ")
                    }

                }

                document.getElementById("subdns-"+s.id).innerHTML = status

            }catch(e){

                document.getElementById("subdns-"+s.id).innerHTML = "❌"

            }

        })

    }

}


/* =========================
   DOMAIN CRUD
========================= */

window.saveDomain = async function(){

    const id = document.getElementById("domain_id").value

    let cost = document.getElementById("domain_cost").value
    if(cost) cost = cost.replace(",", ".")

    const data = {
        domain_name: domain_name.value,
        provider: domain_provider.value,
        ip_address: domain_ip.value,
        yearly_cost: cost || null,
        notes: domain_notes.value
    }

    if(id){

        await api(API+"/domains/"+id,{
            method:"PUT",
            headers:{'Content-Type':'application/json'},
            body:JSON.stringify(data)
        })

    }else{

        await api(API+"/domains",{
            method:"POST",
            headers:{'Content-Type':'application/json'},
            body:JSON.stringify(data)
        })

    }

    closeDomainModal()
    loadDomains()
    loadMapping()
    loadCosts()

}


window.deleteDomain = async function(id){

    if(!confirm("Domain löschen?")) return

    await api(API + "/domains/" + id, {
        method: "DELETE"
    })

    loadDomains()
}


/* =========================
   SUBDOMAIN CRUD
========================= */

window.saveSubdomain = async function(){

    const id = document.getElementById("sub_id").value
    const domain_id = document.getElementById("sub_domain_id").value
    const subdomain = document.getElementById("sub_name").value
    const ip_address = document.getElementById("sub_ip").value

    const data = { domain_id, subdomain, ip_address }

    if(id){

        await api(API+"/subdomains/"+id,{
            method:"PUT",
            headers:{'Content-Type':'application/json'},
            body:JSON.stringify(data)
        })

    }else{

        await api(API+"/subdomains",{
            method:"POST",
            headers:{'Content-Type':'application/json'},
            body:JSON.stringify(data)
        })

    }

    closeSubModal()
    loadDomains()

}


window.deleteSub = async function(id){

    if(!confirm("Subdomain löschen?")) return

    await api(API + "/subdomains/" + id, {
        method: "DELETE"
    })

    loadDomains()

}


/* =========================
   DOMAIN MAPPING
========================= */

window.loadMapping = async function(){

    const data = await api(API + "/domainmap")

    const table = document.getElementById("mapping")
    table.innerHTML = ""

    data.forEach(m => {

        const tr = document.createElement("tr")

        tr.innerHTML = `
            <td>${m.domain_name}</td>
            <td>${m.ip_address}</td>
            <td>${m.server_name || ""}</td>
        `

        table.appendChild(tr)

    })

}