let selectedNode = { type: "group", path: "/" }; // type: "group" | "entry"
let currentKind = "simple";

const treeDiv = document.getElementById("tree");
const currentPathEl = document.getElementById("current-path");

const editorSimple = document.getElementById("editor-simple");
const editorComplex = document.getElementById("editor-complex");
const kindSelect = document.getElementById("entry-kind");

function showEditor(kind) {
    editorSimple.style.display = (kind === "simple") ? "block" : "none";
    editorComplex.style.display = (kind === "complex") ? "block" : "none";
}

kindSelect.addEventListener("change", () => {
    currentKind = kindSelect.value;
    showEditor(currentKind);
});

async function api(path, opts = {}) {
    const resp = await fetch(path, opts);
    if (!resp.ok) {
        const txt = await resp.text();
        throw new Error("API error: " + txt);
    }
    if (resp.headers.get("Content-Type")?.includes("application/json")) {
        return resp.json();
    }
    return null;
}

function renderTree(node) {
    const ul = document.createElement("ul");

    const mkEntryLi = (e) => {
        const li = document.createElement("li");
        li.textContent = "🔑 " + e.title;
        li.className = "node";
        li.onclick = () => {
            selectedNode = { type: "entry", path: e.path, kind: e.kind };
            currentPathEl.textContent = e.path;
            kindSelect.value = e.kind;
            showEditor(e.kind);
            if (e.kind === "simple") {
                document.getElementById("s-key").value = e.title;
                document.getElementById("s-value").value = "";
            } else {
                document.getElementById("c-title").value = e.title;
                document.getElementById("c-username").value = "";
                document.getElementById("c-password").value = "";
                document.getElementById("c-url").value = "";
                document.getElementById("c-notes").value = "";
            }
        };
        return li;
    };

    const mkGroupLi = (g) => {
        const li = document.createElement("li");
        const header = document.createElement("div");
        header.textContent = "📂 " + (g.name || "/");
        header.className = "node";
        header.onclick = () => {
            selectedNode = { type: "group", path: g.path };
            currentPathEl.textContent = g.path;
        };
        li.appendChild(header);

        const inner = renderTreeChildren(g);
        li.appendChild(inner);
        return li;
    };

    function renderTreeChildren(node) {
        const wrap = document.createElement("ul");
        node.groups.forEach(sg => wrap.appendChild(mkGroupLi(sg)));
        node.entries.forEach(e => wrap.appendChild(mkEntryLi(e)));
        return wrap;
    }

    ul.appendChild(mkGroupLi(node));
    treeDiv.innerHTML = "";
    treeDiv.appendChild(ul);
}

async function refreshTree() {
    const data = await api("/api/v1/tree");
    renderTree(data);
}

// Toolbar lewej kolumny
document.getElementById("btn-refresh").onclick = refreshTree;

document.getElementById("btn-add-group").onclick = async () => {
    const name = prompt("Nazwa nowej grupy:");
    if (!name) return;
    await api("/api/v1/group", {
        method: "POST",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify({ name, parent_path: selectedNode.type === "group" ? selectedNode.path : "/" })
    });
    await refreshTree();
};

document.getElementById("btn-add-entry").onclick = async () => {
    const parent_path = selectedNode.type === "group" ? selectedNode.path : "/";
    const kind = kindSelect.value;
    if (kind === "simple") {
        const key = prompt("Klucz (title):"); if (!key) return;
        const value = prompt("Wartość (password):"); if (value === null) return;
        await api("/api/v1/entry", {
            method: "POST",
            headers: {"Content-Type": "application/json"},
            body: JSON.stringify({ kind, parent_path, data: { key, value } })
        });
    } else {
        const title = prompt("Tytuł:"); if (!title) return;
        await api("/api/v1/entry", {
            method: "POST",
            headers: {"Content-Type": "application/json"},
            body: JSON.stringify({ kind, parent_path, data: { title, username:"", password:"", url:"", notes:"" } })
        });
    }
    await refreshTree();
};

// Edytory
document.getElementById("s-save").onclick = async () => {
    if (selectedNode.type !== "entry") { alert("Wybierz wpis"); return; }
    const data = { key: document.getElementById("s-key").value, value: document.getElementById("s-value").value };
    await api("/api/v1/entry", {
        method: "PATCH",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify({ path: selectedNode.path, kind: "simple", data })
    });
    await refreshTree();
};
document.getElementById("s-delete").onclick = async () => {
    if (selectedNode.type !== "entry") return;
    if (!confirm("Usunąć wpis?")) return;
    await api("/api/v1/entry?path=" + encodeURIComponent(selectedNode.path), { method: "DELETE" });
    await refreshTree();
};

document.getElementById("c-save").onclick = async () => {
    if (selectedNode.type !== "entry") { alert("Wybierz wpis"); return; }
    const data = {
        title: document.getElementById("c-title").value,
        username: document.getElementById("c-username").value,
        password: document.getElementById("c-password").value,
        url: document.getElementById("c-url").value,
        notes: document.getElementById("c-notes").value
    };
    await api("/api/v1/entry", {
        method: "PATCH",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify({ path: selectedNode.path, kind: "complex", data })
    });
    await refreshTree();
};
document.getElementById("c-delete").onclick = async () => {
    if (selectedNode.type !== "entry") return;
    if (!confirm("Usunąć wpis?")) return;
    await api("/api/v1/entry?path=" + encodeURIComponent(selectedNode.path), { method: "DELETE" });
    await refreshTree();
};

document.getElementById("btn-move-entry").onclick = async () => {
    if (selectedNode.type !== "entry") { alert("Wybierz wpis"); return; }
    const target = document.getElementById("target-group").value || "/";
    await api("/api/v1/entry/move", {
        method: "PATCH",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify({ path: selectedNode.path, target_group_path: target })
    });
    await refreshTree();
};

document.getElementById("btn-save-all").onclick = async () => {
    await api("/api/v1/save", { method: "POST" });
    alert("Zapisano do bazy");
};

// Start
showEditor(currentKind);
refreshTree().catch(err => console.error(err));