(function () {
    "use strict";

    const summary = document.getElementById("local-video-summary");
    const body = document.querySelector("#local-video-list [data-data-list-body]");
    const refreshButton = document.getElementById("local-videos-refresh-btn");
    const playerPanel = document.getElementById("local-video-player-panel");
    const playerTitle = document.getElementById("local-video-player-title");
    const player = document.getElementById("local-video-player");
    const closePlayerButton = document.getElementById("local-video-player-close");
    let playingPath = null;

    const thumbnailObserver = new IntersectionObserver(function (entries, observer) {
        entries.forEach(function (entry) {
            if (!entry.isIntersecting) {
                return;
            }
            const image = entry.target;
            image.src = `/api/local-video/thumbnail?path=${encodeURIComponent(image.dataset.path)}`;
            observer.unobserve(image);
        });
    }, { rootMargin: "200px" });

    function fetchJson(url, options) {
        return fetch(url, options).then(function (response) {
            return response.json().then(function (data) {
                if (!response.ok) {
                    throw new Error(data.message || data.error || data.status || `HTTP ${response.status}`);
                }
                return data;
            });
        });
    }

    function textCell(text) {
        const cell = document.createElement("td");
        cell.textContent = text;
        return cell;
    }

    function closePlayer() {
        player.pause();
        player.removeAttribute("src");
        player.load();
        playerPanel.hidden = true;
        playingPath = null;
    }

    function playVideo(path) {
        playingPath = path;
        playerTitle.textContent = path;
        player.src = `/api/local-video/file?path=${encodeURIComponent(path)}`;
        playerPanel.hidden = false;
        player.load();
        player.play().catch(function () {
            // Browser autoplay policy may require the user to press play.
        });
        playerPanel.scrollIntoView({ behavior: "smooth", block: "start" });
    }

    function renderFiles(result) {
        thumbnailObserver.disconnect();
        body.replaceChildren();
        const files = result.files || [];
        let uploadedCount = 0;

        files.forEach(function (file) {
            const row = document.createElement("tr");
            row.dataset.path = file.path;
            row.dataset.size = file.size;
            row.dataset.modified = file.modified_at;
            row.dataset.uploaded = file.uploaded ? "1" : "0";

            const preview = document.createElement("td");
            const image = document.createElement("img");
            image.className = "local-video-thumbnail";
            image.alt = `Preview of ${file.path}`;
            image.loading = "lazy";
            image.dataset.path = file.path;
            image.addEventListener("error", function () {
                image.hidden = true;
            });
            preview.appendChild(image);
            row.appendChild(preview);
            thumbnailObserver.observe(image);

            row.appendChild(textCell(file.path));
            row.appendChild(textCell(YarisUI.formatBytes(file.size)));
            row.appendChild(textCell(new Date(file.modified_at * 1000).toLocaleString()));

            const upload = document.createElement("td");
            const badge = document.createElement("span");
            badge.className = file.uploaded ? "badge bg-success" : "badge bg-warning text-dark";
            badge.textContent = file.uploaded ? "Uploaded" : "Pending";
            upload.appendChild(badge);
            row.appendChild(upload);
            if (file.uploaded) {
                uploadedCount += 1;
            }

            const actions = document.createElement("td");
            actions.className = "data-list-actions";
            const playButton = document.createElement("button");
            playButton.type = "button";
            playButton.className = "btn btn-sm btn-outline-primary";
            playButton.dataset.playPath = file.path;
            playButton.innerHTML = '<i class="fas fa-play me-1"></i>Play';
            actions.appendChild(playButton);

            const deleteButton = document.createElement("button");
            deleteButton.type = "button";
            deleteButton.className = "btn btn-sm btn-outline-danger";
            deleteButton.dataset.deleteLocalPath = file.path;
            deleteButton.dataset.confirm = `Delete the local Pi copy of "${file.path}"? The remote archive will not be changed.`;
            deleteButton.innerHTML = '<i class="fas fa-trash me-1"></i>Delete local';
            actions.appendChild(deleteButton);
            row.appendChild(actions);
            body.appendChild(row);
        });

        summary.textContent = `${files.length} video(s), ${YarisUI.formatBytes(result.total_size || 0)} total, ${uploadedCount} uploaded`;
        if (result.retention_days > 0) {
            summary.textContent += `; uploaded copies older than ${result.retention_days} day(s) are auto-deleted`;
        } else {
            summary.textContent += "; automatic retention cleanup is off";
        }
        if (result.errors && result.errors.length) {
            summary.textContent += ` (${result.errors.length} file error(s))`;
        }
    }

    function refreshFiles() {
        refreshButton.disabled = true;
        summary.textContent = "Loading...";
        return fetchJson("/api/local-videos")
            .then(renderFiles)
            .catch(function (error) {
                body.replaceChildren();
                summary.textContent = `Unable to list local videos: ${error.message}`;
            })
            .finally(function () {
                refreshButton.disabled = false;
            });
    }

    function deleteVideo(path) {
        return fetchJson("/api/local-video", {
            method: "DELETE",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ path }),
        }).then(function () {
            if (playingPath === path) {
                closePlayer();
            }
            return refreshFiles();
        }).catch(function (error) {
            summary.textContent = `Local delete failed: ${error.message}`;
        });
    }

    body.addEventListener("click", function (event) {
        const playButton = event.target.closest("[data-play-path]");
        if (playButton) {
            playVideo(playButton.dataset.playPath);
            return;
        }

        const deleteButton = event.target.closest("[data-delete-local-path]");
        if (deleteButton) {
            deleteButton.disabled = true;
            deleteVideo(deleteButton.dataset.deleteLocalPath).finally(function () {
                deleteButton.disabled = false;
            });
        }
    });
    refreshButton.addEventListener("click", refreshFiles);
    closePlayerButton.addEventListener("click", closePlayer);
    refreshFiles();
}());