var cpuChart = null;
var memChart = null;
var diskChart = null;
var sysStatusTimer = null;
var resizeHandler = null;
var sysAbortController = null;

function getSystemInfo() {
    sysAbortController && sysAbortController.abort();
    sysAbortController = new AbortController();
    fetch("/api/system/info", { signal: sysAbortController.signal })
        .then(function (r) {
            if (!r.ok) throw new Error("HTTP " + r.status);
            return r.json();
        })
        .then(function (d) {
            if (!cpuChart || !memChart || !diskChart) {
                return;
            }
            cpuChart.setOption({
                graphic: [
                    {
                        type: "text",
                        left: "center",
                        top: "75%",
                        style: {
                            text:
                                (d.cpu_cores || "--") +
                                "核 " +
                                (d.cpu_freq || "--") +
                                "MHz  温度" +
                                (d.cpu_temp || "--"),
                            fill: "#aaa",
                            fontSize: 15,
                        },
                    },
                ],
                series: [
                    {
                        data: [
                            { value: Number((d.cpu_usage != null ? d.cpu_usage : 0).toFixed(1)) },
                        ],
                    },
                ],
            });
            memChart.setOption({
                graphic: [
                    {
                        type: "text",
                        left: "center",
                        top: "75%",
                        style: {
                            text: (d.mem_used || "--") + " / " + (d.mem_total || "--"),
                            fill: "#aaa",
                            fontSize: 15,
                        },
                    },
                ],
                series: [{ data: [{ value: d.mem_percent != null ? d.mem_percent : 0 }] }],
            });
            diskChart.setOption({
                title: {
                    text: d.disk_percent + "%",
                    subtext: (d.disk_used || "--") + " / " + (d.disk_total || "--"),
                    left: "center",
                    top: "38%",
                    textStyle: {
                        fontSize: 38,
                        fontWeight: "bold",
                    },
                    subtextStyle: {
                        fontSize: 15,
                    },
                },
                series: [
                    {
                        data: [
                            { value: d.disk_percent != null ? d.disk_percent : 0, name: "已使用" },
                            { value: 100 - d.disk_percent, name: "剩余" },
                        ],
                    },
                ],
            });
        })
        .catch(function (e) {
            if (e.name !== "AbortError") {
                console.error("system info failed:", e);
            }
        });
}

function gaugeOption() {
    return {
        series: [
            {
                type: "gauge",
                radius: "95%",
                center: ["50%", "55%"],
                min: 0,
                max: 100,
                startAngle: 210,
                endAngle: -30,
                axisLine: {
                    lineStyle: {
                        width: 22,
                    },
                },
                progress: {
                    show: true,
                    width: 22,
                },
                pointer: { show: false },
                axisTick: { show: false },
                splitLine: { show: false },
                axisLabel: { show: false },
                detail: {
                    fontSize: 42,
                    fontWeight: "bold",
                    offsetCenter: [0, "0%"],
                    formatter: "{value}%",
                },
                title: { show: false },
                data: [{ value: 0 }],
            },
        ],
    };
}

function getLoadInfo() {
    fetch("/api/system/loadAverage")
        .then(function (r) {
            if (!r.ok) {
                throw new Error("HTTP " + r.status);
            }
            return r.json();
        })
        .then(function (data) {
            ["load1m", "load5m", "load15m", "runQueue", "bootTime", "uptime"].forEach(
                function (id) {
                    return setText(id, data[id], "page1");
                }
            );
        })
        .catch(function (e) {
            console.error("load info failed:", e);
            ["load1m", "load5m", "load15m", "runQueue", "bootTime", "uptime"].forEach(
                function (id) {
                    return setText(id, null, "page1");
                }
            );
        });
}

function getServiceInfo() {
    fetch("/api/system/serviceStatus")
        .then(function (r) {
            if (!r.ok) {
                throw new Error("HTTP " + r.status);
            }
            return r.json();
        })
        .then(function (data) {
            [
                "var1",
                "var2",
                "var3",
                "var4",
                "var5",
                "var6",
                "var7",
                "var8",
                "var9",
                "var10",
                "var11",
                "var22",
                "var33",
                "var44",
                "var55",
                "var66",
                "var77",
                "var88",
                "var99",
            ].forEach(function (id) {
                return setText(id, data[id], "page1");
            });
        })
        .catch(function (e) {
            console.error("getAllServiceStatus() failed:", e);
            [
                "var1",
                "var2",
                "var3",
                "var4",
                "var5",
                "var6",
                "var7",
                "var8",
                "var9",
                "var10",
                "var11",
                "var22",
                "var33",
                "var44",
                "var55",
                "var66",
                "var77",
                "var88",
                "var99",
            ].forEach(function (id) {
                return setText(id, null, "page1");
            });
        });
}

function startSysStatusRefresh() {
    if (sysStatusTimer) return;
    getSystemInfo();
    getLoadInfo();
    getServiceInfo();
    sysStatusTimer = setInterval(function () {
        getSystemInfo();
        getLoadInfo();
        getServiceInfo();
    }, 5000);
}

function stopSysStatusRefresh() {
    if (sysStatusTimer) {
        clearInterval(sysStatusTimer);
        sysStatusTimer = null;
    }
}

function resizeSysCharts() {
    cpuChart && cpuChart.resize();
    memChart && memChart.resize();
    diskChart && diskChart.resize();
}
var serviceNames = {
    "yfkj-networkd.service": "设备自动联网",
    "yfkj-timesyncd.service": "系统时间同步",
    "yfkj-gnss.service": "地理坐标定位",
    "yfkj-camera-capture.service": "相机图像采集",
    "yfkj-sshd-mqtt-bridge.service": "远程运维通道",
    "yfkj-app-install.service": "应用安装卸载",
    "yfkj-web-ui.service": "本地配置管理",
    "yfkj-frp-client.service": "公网配置管理",
    "yfkj-upgrade.service": "开机自动升级",
};

function switchServiceVersion(service, action) {
    var name = serviceNames[service] || service;
    var msg =
        action === "factory"
            ? "确认将【" +
              name +
              "】恢复到出厂版本吗？\n\n警告: 切换过程中服务会自动重启，请勿断开电源！"
            : "确认将【" +
              name +
              "】回退到上一版本吗？\n\n警告: 切换过程中服务会自动重启，请勿断开电源！";
    if (!confirm(msg)) {
        return;
    }
    var password = prompt("请输入操作密码：");
    if (password === null) {
        return;
    }
    password = password.trim();
    fetch("/api/service/version/switch", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            service: service,
            action: action,
            password: password,
        }),
    })
        .then(function (r) {
            return r.json();
        })
        .then(function (d) {
            alert(
                "【" +
                    name +
                    "】\n\n" +
                    (d.status == "ok" ? "版本切换成功" : "版本切换失败：" + d.message)
            );
        })
        .catch(function (e) {
            alert("【" + name + "】\n\n请求失败：" + e.message);
        });
}

function switchAutoUpgrade(event, action) {
    var enable = action.startsWith("enable");
    var msg = enable ? "确认要启用 【开机自动升级】 吗？" : "确认要关闭 【开机自动升级】 吗？";
    if (!confirm(msg)) {
        return;
    }
    var password = prompt("请输入操作密码：");
    if (password === null) {
        return;
    }
    password = password.trim();
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/service/control", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            name: "yfkj-upgrade.service",
            action: action,
            secret: password,
        }),
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            return r.json();
        })
        .then(function (d) {
            if (d.ok) {
                alert("【开机自动升级】\n\n" + (enable ? "已启用" : "已禁用"));
            } else {
                alert("操作失败");
            }
        })
        .catch(function (e) {
            alert("【开机自动升级】\n\n请求失败: " + e.message);
        })
        .finally(function () {
            btn.disabled = false;
        });
}

function downloadUpgradeLogFile(event) {
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/upgrade/logfile")
        .then(function (r) {
            if (!r.ok) {
                throw new Error("HTTP " + r.status);
            }
            var disposition = r.headers.get("Content-Disposition");
            var filename = "upgrade.log.tar.gz";
            if (disposition) {
                var match = disposition.match(/filename="?([^";]+)"?/);
                if (match) {
                    filename = match[1];
                }
            }
            return r.blob().then(function (blob) {
                return { blob: blob, filename: filename };
            });
        })
        .then(function (res) {
            downloadBlobFile(res.blob, res.filename);
            alert("下载成功");
        })
        .catch(function (e) {
            console.error("download failed:", e);
            alert("下载失败: " + e.message);
        })
        .finally(function () {
            btn.disabled = false;
            btn.textContent = "下载升级日志";
        });
}

function startPublicAccess(event) {
    if (!confirm("确定开启公网访问吗？")) {
        return;
    }
    var password = prompt("请输入操作密码：");
    if (password === null) {
        return;
    }
    password = password.trim();
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/service/control", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            name: "yfkj-frp-client.service",
            action: "start",
            secret: password,
        }),
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            return r.json();
        })
        .then(function (d) {
            alert(d.ok ? "开启公网访问成功" : "开启公网访问失败");
        })
        .catch(function (e) {
            alert("开启公网访问失败: " + e.message);
        })
        .finally(function () {
            btn.disabled = false;
        });
}

function stopPublicAccess(event) {
    if (!confirm("确定关闭公网访问吗？")) {
        return;
    }
    var password = prompt("请输入操作密码：");
    if (password === null) {
        return;
    }
    password = password.trim();
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/service/control", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            name: "yfkj-frp-client.service",
            action: "stop",
            secret: password,
        }),
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            return r.json();
        })
        .then(function (d) {
            alert(d.ok ? "关闭公网访问成功" : "关闭公网访问失败");
        })
        .catch(function (e) {
            alert("关闭公网访问失败: " + e.message);
        })
        .finally(function () {
            btn.disabled = false;
        });
}

function initChart(id, option) {
    var dom = document.getElementById(id);
    if (!dom) {
        return null;
    }
    var chart = echarts.init(dom);
    chart.setOption(option);
    return chart;
}

function initPage1() {
    cpuChart = initChart("cpu-chart", gaugeOption());
    memChart = initChart("mem-chart", gaugeOption());
    diskChart = initChart("disk-chart", {
        title: {
            text: "0%",
            subtext: "-- / --",
            left: "center",
            top: "38%",
            textStyle: {
                fontSize: 38,
                fontWeight: "bold",
            },
            subtextStyle: {
                fontSize: 15,
            },
        },
        series: [
            {
                type: "pie",
                radius: ["65%", "85%"],
                label: { show: false },
                data: [
                    { value: 0, name: "已使用" },
                    { value: 100, name: "剩余" },
                ],
            },
        ],
    });
    resizeHandler = resizeSysCharts;
    window.addEventListener("resize", resizeHandler);
    waitChartResize();
    startSysStatusRefresh();
}

function waitChartResize(count) {
    if (count === undefined) {
        count = 0;
    }
    resizeSysCharts();
    var dom = document.getElementById("cpu-chart");
    if (dom && dom.clientWidth > 0 && dom.clientHeight > 0) {
        return;
    }
    dom = document.getElementById("mem-chart");
    if (dom && dom.clientWidth > 0 && dom.clientHeight > 0) {
        return;
    }
    dom = document.getElementById("disk-chart");
    if (dom && dom.clientWidth > 0 && dom.clientHeight > 0) {
        return;
    }
    if (count < 50) {
        setTimeout(function () {
            waitChartResize(count + 1);
        }, 100);
    }
}

function exitPage1() {
    sysAbortController && sysAbortController.abort();
    sysAbortController = null;
    stopSysStatusRefresh();
    if (resizeHandler) {
        window.removeEventListener("resize", resizeHandler);
        resizeHandler = null;
    }
    cpuChart && cpuChart.dispose();
    memChart && memChart.dispose();
    diskChart && diskChart.dispose();
    cpuChart = null;
    memChart = null;
    diskChart = null;
}