// Tab Navigation
document.querySelectorAll(".tab").forEach(tab => {
    tab.addEventListener("click", () => {
        document.querySelectorAll(".tab").forEach(t => t.classList.remove("active"));
        document.querySelectorAll(".tab-content").forEach(c => c.classList.remove("active"));
        tab.classList.add("active");
        document.getElementById(tab.dataset.tab).classList.add("active");
        if (tab.dataset.tab === "admin") loadTemplates();
    });
});

function setupUploadZone(zoneId, inputId, infoId, btnId) {
    const zone = document.getElementById(zoneId);
    const input = document.getElementById(inputId);
    const info = document.getElementById(infoId);
    const btn = document.getElementById(btnId);
    if (!zone || !input) return;
    
    zone.addEventListener("click", () => input.click());
    zone.addEventListener("dragover", (e) => { e.preventDefault(); zone.classList.add("dragover"); });
    zone.addEventListener("dragleave", () => zone.classList.remove("dragover"));
    zone.addEventListener("drop", (e) => {
        e.preventDefault();
        zone.classList.remove("dragover");
        if (e.dataTransfer.files.length) {
            input.files = e.dataTransfer.files;
            updateFileInfo(input, info, btn);
        }
    });
    input.addEventListener("change", () => updateFileInfo(input, info, btn));
}

function updateFileInfo(input, info, btn) {
    if (input.files.length && info && btn) {
        const file = input.files[0];
        info.innerHTML = "<strong>OK " + file.name + "</strong> (" + (file.size/1024).toFixed(1) + " KB)";
        info.classList.add("visible");
        btn.disabled = false;
    }
}

function showStatus(id, type, message) {
    const status = document.getElementById(id);
    if (status) {
        status.className = "status visible " + type;
        status.textContent = message;
    }
}

const API_BASE = "/schadenprotokoll/api";

setupUploadZone("laufzettel-zone", "laufzettel-input", "laufzettel-info", "generate-btn");
setupUploadZone("pdf-zone", "pdf-input", "pdf-info", "analyze-btn");
setupUploadZone("vorbericht-zone", "vorbericht-input", "vorbericht-info", "vorbericht-btn");

document.getElementById("generate-btn").addEventListener("click", async () => {
    showStatus("generate-status", "loading", "Verarbeite Laufzettel...");
    const file = document.getElementById("laufzettel-input").files[0];
    const formData = new FormData();
    formData.append("file", file);
    
    try {
        const response = await fetch(API_BASE + "/generate", { method: "POST", body: formData });
        if (!response.ok) throw new Error((await response.json()).error);
        const blob = await response.blob();
        const a = document.createElement("a");
        a.href = URL.createObjectURL(blob);
        a.download = "Schadenprotokoll_vorbefuellt.pdf";
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        showStatus("generate-status", "success", "PDF erfolgreich generiert!");
    } catch (err) {
        showStatus("generate-status", "error", "Fehler: " + err.message);
    }
});

document.getElementById("analyze-btn").addEventListener("click", async () => {
    showStatus("analyze-status", "loading", "Analysiere PDF...");
    const file = document.getElementById("pdf-input").files[0];
    const formData = new FormData();
    formData.append("file", file);
    
    try {
        const response = await fetch(API_BASE + "/analyze", { method: "POST", body: formData });
        if (!response.ok) throw new Error((await response.json()).error);
        const result = await response.json();
        displayAnalysisResult(result.data);
        showStatus("analyze-status", "success", "Analyse abgeschlossen");
    } catch (err) {
        showStatus("analyze-status", "error", "Fehler: " + err.message);
    }
});

function displayAnalysisResult(data) {
    const container = document.getElementById("analyze-data");
    let html = "";
    for (const [key, value] of Object.entries(data.textfields || {})) {
        if (value) html += "<div class='dropdown-item'><strong>" + key + ":</strong> " + value + "</div>";
    }
    for (const [key, val] of Object.entries(data.dropdowns || {})) {
        if (val.selected) html += "<div class='dropdown-item'><strong>" + key + ":</strong> " + val.selected + "</div>";
    }
    container.innerHTML = html || "<p>Keine Felder gefunden.</p>";
    document.getElementById("analyze-result").classList.add("visible");
}

document.getElementById("vorbericht-btn").addEventListener("click", async () => {
    showStatus("vorbericht-status", "loading", "Erstelle Vorbericht...");
    const file = document.getElementById("vorbericht-input").files[0];
    const formData = new FormData();
    formData.append("file", file);
    
    try {
        const response = await fetch(API_BASE + "/vorbericht", { method: "POST", body: formData });
        if (!response.ok) throw new Error((await response.json()).error);
        const blob = await response.blob();
        const a = document.createElement("a");
        a.href = URL.createObjectURL(blob);
        a.download = "Vorbericht.docx";
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        showStatus("vorbericht-status", "success", "Vorbericht erstellt!");
    } catch (err) {
        showStatus("vorbericht-status", "error", "Fehler: " + err.message);
    }
});

function setupTemplateUpload(zoneId, inputId, templateType) {
    const zone = document.getElementById(zoneId);
    const input = document.getElementById(inputId);
    if (!zone || !input) return;
    zone.addEventListener("click", () => input.click());
    zone.addEventListener("dragover", (e) => { e.preventDefault(); zone.classList.add("dragover"); });
    zone.addEventListener("dragleave", () => zone.classList.remove("dragover"));
    zone.addEventListener("drop", (e) => {
        e.preventDefault();
        zone.classList.remove("dragover");
        if (e.dataTransfer.files.length) uploadTemplate(e.dataTransfer.files[0], templateType);
    });
    input.addEventListener("change", () => { if (input.files.length) uploadTemplate(input.files[0], templateType); });
}

async function loadTemplates() {
    const container = document.getElementById("templates-container");
    if (!container) return;
    try {
        const response = await fetch(API_BASE + "/templates");
        const data = await response.json();
        container.innerHTML = data.templates.map(t => 
            "<div class='template-item'><span>" + t.name + "</span><span>" + (t.size/1024).toFixed(0) + " KB</span></div>"
        ).join("");
    } catch (err) { container.innerHTML = "Fehler"; }
}

async function uploadTemplate(file, type) {
    showStatus("admin-status", "loading", "Lade hoch...");
    const formData = new FormData();
    formData.append("file", file);
    formData.append("type", type);
    try {
        const response = await fetch(API_BASE + "/templates/upload", { method: "POST", body: formData });
        if (!response.ok) throw new Error((await response.json()).error);
        showStatus("admin-status", "success", "Hochgeladen!");
        loadTemplates();
    } catch (err) { showStatus("admin-status", "error", "Fehler: " + err.message); }
}

setupTemplateUpload("pdf-template-zone", "pdf-template-input", "pdf");
setupTemplateUpload("docx-template-zone", "docx-template-input", "docx");