(function () {
    "use strict";

    const view = document.body.dataset.view || "";
    const canViewMiners =
        document.body.dataset.canViewMiners === "true";

    function text(value, fallback) {
        if (value === null || value === undefined || String(value).trim() === "") {
            return fallback || "Not available";
        }
        return String(value);
    }

    function statusName(value) {
        return text(value, "unknown").toLowerCase().replaceAll(" ", "_");
    }

    function create(tag, options) {
        const element = document.createElement(tag);
        const values = options || {};
        if (values.className) element.className = values.className;
        if (values.text !== undefined) element.textContent = values.text;
        if (values.href) element.href = values.href;
        return element;
    }

    function showState(name, message) {
        for (const state of document.querySelectorAll("[data-view-state]")) {
            state.hidden = state.dataset.viewState !== name;
        }
        const active = document.querySelector(
            '[data-view-state="' + name + '"]'
        );
        const detail = active && active.querySelector("[data-state-detail]");
        if (detail && message) detail.textContent = message;
    }

    async function api(path) {
        const controller = new AbortController();
        const timeout = window.setTimeout(function () {
            controller.abort();
        }, 15000);
        let response;
        try {
            response = await fetch(path, {
                credentials: "same-origin",
                headers: { Accept: "application/json" },
                signal: controller.signal
            });
        } catch (error) {
            if (error && error.name === "AbortError") {
                throw new Error(
                    "MinerOps took too long to respond. Retry in a moment."
                );
            }
            throw new Error(
                "MinerOps could not reach the backend. Check the connection and retry."
            );
        } finally {
            window.clearTimeout(timeout);
        }
        if (response.status === 401) {
            window.location.replace(
                "/login?next=" +
                encodeURIComponent(window.location.pathname + window.location.search)
            );
            throw new Error("Your session expired. Sign in again to continue.");
        }
        if (response.status === 403) {
            const denied = new Error(
                "Your account does not have permission to view this information."
            );
            denied.permissionDenied = true;
            throw denied;
        }
        if (!response.ok) {
            throw new Error(
                "MinerOps could not load this information. Retry in a moment."
            );
        }
        try {
            return await response.json();
        } catch (error) {
            throw new Error(
                "MinerOps returned an invalid response. Retry in a moment."
            );
        }
    }

    function setupShell() {
        const menu = document.getElementById("menuButton");
        const nav = document.getElementById("primaryNav");
        if (menu && nav) {
            menu.addEventListener("click", function () {
                const open = nav.dataset.open !== "true";
                nav.dataset.open = String(open);
                menu.setAttribute("aria-expanded", String(open));
            });
        }

        const search = document.getElementById("globalSearchForm");
        const searchInput = document.getElementById("globalSearchInput");
        if (search && searchInput) {
            search.addEventListener("submit", function (event) {
                event.preventDefault();
                const query = searchInput.value.trim();
                const target = query
                    ? "/assets/miners?query=" + encodeURIComponent(query)
                    : "/assets/miners";
                window.location.assign(target);
            });
        }

        const logout = document.getElementById("logoutButton");
        if (logout) {
            logout.addEventListener("click", async function () {
                logout.disabled = true;
                try {
                    await fetch("/api/auth/logout", {
                        method: "POST",
                        credentials: "same-origin"
                    });
                } finally {
                    window.location.replace("/login");
                }
            });
        }
    }

    function addCell(row, label, content) {
        const cell = create("td");
        cell.dataset.label = label;
        if (content instanceof Node) cell.appendChild(content);
        else cell.textContent = text(content);
        row.appendChild(cell);
    }

    function status(value) {
        const label = create("span", {
            className: "status-text",
            text: text(value, "Unknown").replaceAll("_", " ")
        });
        label.dataset.status = statusName(value);
        return label;
    }

    function dateTime(value) {
        if (!value) return "Not available";
        const parsed = new Date(value);
        return Number.isNaN(parsed.valueOf())
            ? String(value)
            : parsed.toLocaleString();
    }

    async function loadRepairs() {
        const rows = document.getElementById("repairRows");
        if (!rows) return;
        showState("loading");
        try {
            const envelope = await api("/api/repairs/queue");
            if (
                !envelope ||
                !envelope.data ||
                typeof envelope.data !== "object" ||
                !Array.isArray(envelope.data.items)
            ) {
                throw new Error(
                    "MinerOps returned an invalid repair response."
                );
            }
            const items = envelope.data.items;
            if (!items.every(function (item) {
                return item &&
                    typeof item === "object" &&
                    typeof item.miner_id === "string" &&
                    item.miner_id.trim() !== "";
            })) {
                throw new Error(
                    "MinerOps returned an incomplete repair response."
                );
            }
            rows.replaceChildren();
            if (!items.length) {
                showState("empty");
                return;
            }
            for (const repair of items) {
                const row = create("tr");
                const identity = create("div");
                const minerLabel = text(
                    repair.current_mac,
                    text(repair.miner_id, "Unknown miner")
                );
                if (canViewMiners) {
                    identity.appendChild(create("a", {
                        className: "object-link",
                        text: minerLabel,
                        href: "/miners/" +
                            encodeURIComponent(repair.miner_id) +
                            "/detail"
                    }));
                } else {
                    identity.appendChild(create("strong", {
                        text: minerLabel
                    }));
                }
                identity.appendChild(create("span", {
                    className: "secondary",
                    text: text(repair.current_ip, "No current IP")
                }));
                addCell(row, "Miner", identity);
                addCell(row, "Model", repair.model);
                addCell(
                    row,
                    "Repair state",
                    status(repair.latest_event_status || repair.asset_state)
                );
                addCell(
                    row,
                    "Reported issue",
                    repair.reported_error ||
                        repair.latest_event_title ||
                        "No reported issue"
                );
                addCell(
                    row,
                    "Last update",
                    dateTime(repair.latest_event_at || repair.state_updated_at)
                );
                rows.appendChild(row);
            }
            showState("ready");
        } catch (error) {
            showState(
                error.permissionDenied ? "denied" : "error",
                error.message
            );
        }
    }

    function locationText(miner) {
        if (miner.room_id) return "Room " + miner.room_id;
        if (miner.site_id) return "Site " + miner.site_id;
        return "Not assigned";
    }

    async function loadMiners(query) {
        const rows = document.getElementById("minerRows");
        if (!rows) return;
        showState("loading");
        const params = new URLSearchParams({ limit: "100", offset: "0" });
        if (query) params.set("query", query);
        try {
            const envelope = await api(
                "/api/inventory/miners?" + params.toString()
            );
            if (!envelope || !Array.isArray(envelope.data)) {
                throw new Error(
                    "MinerOps returned an invalid inventory response."
                );
            }
            const miners = envelope.data;
            if (!miners.every(function (miner) {
                return miner &&
                    typeof miner === "object" &&
                    typeof miner.id === "string" &&
                    miner.id.trim() !== "";
            })) {
                throw new Error(
                    "MinerOps returned an incomplete inventory response."
                );
            }
            rows.replaceChildren();
            if (!miners.length) {
                showState(
                    "empty",
                    query
                        ? "No authorized miners match this search."
                        : "No miners have been added or discovered yet."
                );
                return;
            }
            for (const miner of miners) {
                const row = create("tr");
                const identity = create("div");
                const link = create("a", {
                    className: "object-link",
                    text: text(miner.asset_id, "No Asset ID"),
                    href: "/miners/" +
                        encodeURIComponent(miner.id) +
                        "/detail"
                });
                identity.appendChild(link);
                identity.appendChild(create("span", {
                    className: "secondary",
                    text: miner.id
                }));
                addCell(row, "Asset ID", identity);
                addCell(
                    row,
                    "Current MAC",
                    miner.current_mac || "Not observed"
                );
                addCell(row, "Model", miner.model);
                addCell(row, "Lifecycle", status(miner.lifecycle_status));
                addCell(row, "Runtime", status(miner.runtime_status));
                addCell(row, "Location", locationText(miner));
                rows.appendChild(row);
            }
            showState("ready");
        } catch (error) {
            showState(
                error.permissionDenied ? "denied" : "error",
                error.message
            );
        }
    }

    function setupMiners() {
        const form = document.getElementById("minerSearchForm");
        const input = document.getElementById("minerSearchInput");
        if (!form || !input) return;
        const initial =
            new URLSearchParams(window.location.search).get("query") || "";
        input.value = initial;
        form.addEventListener("submit", function (event) {
            event.preventDefault();
            const query = input.value.trim();
            const url = query
                ? "/assets/miners?query=" + encodeURIComponent(query)
                : "/assets/miners";
            window.history.pushState({ query: query }, "", url);
            loadMiners(query);
        });
        window.addEventListener("popstate", function () {
            const query =
                new URLSearchParams(window.location.search).get("query") || "";
            input.value = query;
            loadMiners(query);
        });
        loadMiners(initial);
    }

    setupShell();
    if (view === "repairs") loadRepairs();
    if (view === "miners") setupMiners();
})();