var cameraLogLevel = "";

function setCameraLogLevel() {
    var level = logLevel.value;
    fetch("/api/camera/loglevel", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ level: level }),
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            cameraLogLevel = level;
        })
        .catch(function (e) {
            logLevel.value = cameraLogLevel;
        });
}

function getCameraLogLevel() {
    fetch("/api/camera/loglevel")
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            return r.json();
        })
        .then(function (d) {
            cameraLogLevel = d.log_level;
            logLevel.value = d.log_level;
        })
        .catch(function (e) {
            cameraLogLevel = "";
            logLevel.value = "";
        });
}

function downloadCameraLogFile(event) {
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/camera/logfile")
        .then(function (r) {
            if (!r.ok) {
                throw new Error("HTTP " + r.status);
            }
            var disposition = r.headers.get("Content-Disposition");
            var filename = "camera.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";
        });
}

function restartCameraService(event) {
    if (!confirm("确定重启相机服务吗？")) {
        return;
    }
    if (cameraTakingPhoto || cameraPreviewRunning) {
        alert("相机使用中，请稍后再重试！");
        return;
    }
    var btn = event.currentTarget;
    btn.disabled = true;
    fetch("/api/camera/restart", {
        method: "POST",
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            alert("重启成功");
        })
        .catch(function (e) {
            console.error("restart failed:", e);
            alert("重启失败: " + e.message);
        })
        .finally(function () {
            btn.disabled = false;
        });
}

function getCameraStatus() {
    ["btn1", "btn2", "btn3", "btn4"].forEach(function (id) {
        return setBtnStatus(id, false, "page5");
    });
    fetch("/api/camera/status")
        .then(function (r) {
            if (!r.ok) {
                throw new Error("HTTP " + r.status);
            }
            return r.json();
        })
        .then(function (data) {
            ["avar1", "avar2", "avar3", "avar4", "avar5", "avar6"].forEach(function (id) {
                return setText(id, data[id], "page5");
            });
        })
        .catch(function (e) {
            console.error("getCameraStatus() failed:", e);
            ["avar1", "avar2", "avar3", "avar4", "avar5", "avar6"].forEach(function (id) {
                return setText(id, null, "page5");
            });
        })
        .finally(function () {
            updateCameraButtons();
        });
    getCameraLogLevel();
}

function cameraPower(enable) {
    fetch("/api/camera/gpio22power", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            enable: enable,
        }),
    })
        .then(function (r) {
            if (!r.ok) {
                return r.text().then(function (t) {
                    throw new Error(t);
                });
            }
            return r.json();
        })
        .then(function (data) {
            if (data.ok) {
                setText("avar5", enable === "true" ? { level: "ok", text: "打开" } : null, "page5");
                alert(enable === "true" ? "上电成功" : "断电成功");
            } else {
                // 目前后端不会这么返回，避免以后修改代码
                alert("操作失败");
            }
        })
        .catch(function (e) {
            setText("avar5", null, "page5");
            alert("操作失败: " + e.message);
        });
}

function cameraPing() {
    fetch("/api/camera/pingGigeCamera", { method: "POST" })
        .then(function (r) {
            return r.json();
        })
        .then(function (data) {
            setText("avar6", data.avar6, "page5");
            alert(
                data.avar6 && data.avar6.level === "ok"
                    ? "网口相机Ping测试成功"
                    : "网口相机Ping测试失败"
            );
        })
        .catch(function () {
            setText("avar6", null, "page5");
            alert("网口相机Ping测试失败");
        });
}
var cameraPreviewTimer = null;
var cameraPreviewRunning = false;
var cameraPreviewFrames = 0;
var cameraPhotoIndex = 0;
var cameraCurrentFile = "";
var cameraTakingPhoto = false;
var cameraPhotoFiles = ["/tmp/camera_preview_0.jpg", "/tmp/camera_preview_1.jpg"];

function updateCameraButtons() {
    var normalEnable = !cameraPreviewRunning && !cameraTakingPhoto;
    ["btn1", "btn2", "btn3"].forEach(function (id) {
        return setBtnStatus(id, normalEnable, "page5");
    });
    setBtnStatus("btn4", cameraPreviewRunning, "page5");
}

function cameraTakePhoto(filename) {
    return fetch("/api/camera/takePhoto", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            filename: filename,
        }),
    }).then(function (r) {
        if (!r.ok) {
            return r.text().then(function (t) {
                throw new Error(t);
            });
        }
        return r.json();
    });
}
var imageLoadSeq = 0;

function setImageSrc(id, url, showLoadStatus) {
    if (showLoadStatus === undefined) {
        showLoadStatus = true;
    }
    var img = document.getElementById(id);
    if (!img) return;
    var seq = ++imageLoadSeq;
    var start = Date.now();
    img.onload = function () {
        if (seq !== imageLoadSeq || !showLoadStatus) return;
        setText("cvar1", "图片加载完成, 耗时:" + (Date.now() - start) + "ms", "page5");
    };
    img.onerror = function () {
        if (seq !== imageLoadSeq || !showLoadStatus) return;
        setText("cvar1", "图片加载失败, 耗时:" + (Date.now() - start) + "ms", "page5");
    };
    var separator = url.includes("?") ? "&" : "?";
    img.src = url + separator + "t=" + Date.now();
}

function takeOnePhoto() {
    if (cameraPreviewRunning || cameraTakingPhoto) {
        return;
    }
    setCameraWaitAEDone(true)
        .catch(function (e) {
            console.error("open wait AE failed:", e);
        })
        .then(function () {
            cameraTakingPhoto = true;
            updateCameraButtons();
            ["cvar1", "cvar2", "cvar3", "cvar4", "cvar5", "cvar6"].forEach(function (id) {
                return setText(id, null, "page5");
            });
            setText("cvar1", "拍照中, 请稍后...", "page5");
            var filename = cameraPhotoFiles[cameraPhotoIndex];
            cameraPhotoIndex = cameraPhotoIndex ? 0 : 1;
            return cameraTakePhoto(filename)
                .then(function (data) {
                    if (!data.ok) throw new Error("take photo failed");
                    setText("cvar1", "预览中, 请稍后...", "page5");
                    setText("cvar2", "1", "page5");
                    setText("cvar3", data.var1, "page5");
                    setText("cvar4", data.var2, "page5");
                    setText("cvar5", data.var3, "page5");
                    setText("cvar6", data.var4 + "x" + data.var5, "page5");
                    cameraCurrentFile = filename;
                    setImageSrc(
                        "camera-image",
                        "/api/camera/getImage?file=" + encodeURIComponent(cameraCurrentFile),
                        true
                    );
                })
                .catch(function (e) {
                    console.error("takeOnePhoto failed:", e);
                    setText("cvar1", "拍照失败", "page5");
                })
                .finally(function () {
                    cameraTakingPhoto = false;
                    updateCameraButtons();
                });
        });
}

function setCameraWaitAEDone(waitAE) {
    return fetch("/api/camera/setWaitAEDoneForTakePhoto", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            waitAE: waitAE ? "1" : "0",
        }),
    }).then(function (r) {
        if (!r.ok) {
            return r.text().then(function (t) {
                throw new Error(t);
            });
        }
    });
}

function startCameraPreview() {
    if (cameraPreviewRunning || cameraTakingPhoto) {
        return;
    }
    setCameraWaitAEDone(false)
        .catch(function (e) {
            console.error("close wait AE failed:", e);
        })
        .then(function () {
            cameraPreviewRunning = true;
            updateCameraButtons();
            cameraPreviewFrames = 0;
            ["cvar1", "cvar2", "cvar3", "cvar4", "cvar5", "cvar6"].forEach(function (id) {
                return setText(id, null, "page5");
            });
            cameraPreviewLoop();
        });
}

function cameraPreviewLoop() {
    if (!cameraPreviewRunning) {
        return;
    }
    cameraTakingPhoto = true;
    updateCameraButtons();
    setText("cvar1", "拍照中, 请稍后...", "page5");
    var filename = cameraPhotoFiles[cameraPhotoIndex];
    cameraPhotoIndex = cameraPhotoIndex ? 0 : 1;
    cameraTakePhoto(filename)
        .then(function (data) {
            if (!data.ok) throw new Error("take photo failed");
            setText("cvar1", "预览中, 请稍后...", "page5");
            cameraPreviewFrames++;
            setText("cvar2", String(cameraPreviewFrames), "page5");
            setText("cvar3", data.var1, "page5");
            setText("cvar4", data.var2, "page5");
            setText("cvar5", data.var3, "page5");
            setText("cvar6", data.var4 + "x" + data.var5, "page5");
            cameraCurrentFile = filename;
            setImageSrc(
                "camera-image",
                "/api/camera/getImage?file=" + encodeURIComponent(cameraCurrentFile),
                false
            );
        })
        .catch(function (e) {
            console.error("cameraPreviewLoop failed:", e);
            stopCameraPreview();
            setText("cvar1", "拍照失败", "page5");
        })
        .finally(function () {
            cameraTakingPhoto = false;
            updateCameraButtons();
            if (cameraPreviewRunning) {
                cameraPreviewTimer = setTimeout(cameraPreviewLoop, 20);
            } else {
                setText("cvar1", "连拍已停止", "page5");
                setCameraWaitAEDone(true).catch(function (e) {
                    console.error("restore wait AE failed:", e);
                });
            }
        });
}

function stopCameraPreview() {
    if (!cameraPreviewRunning) {
        return;
    }
    cameraPreviewRunning = false;
    updateCameraButtons();
    if (cameraPreviewTimer) {
        clearTimeout(cameraPreviewTimer);
        cameraPreviewTimer = null;
    }
    setText("cvar1", "停止连怕中, 请稍后...", "page5");
}

function downloadCameraImage() {
    if (!cameraCurrentFile) {
        alert("暂无图片");
        return;
    }
    var url = "/api/camera/getImage?file=" + encodeURIComponent(cameraCurrentFile) + "&download=1";
    fetch(url)
        .then(function (r) {
            return r.blob();
        })
        .then(function (blob) {
            downloadBlobFile(blob, "camera.jpg");
        })
        .catch(function () {
            alert("下载失败");
        });
}

function initPage5() {
    getCameraStatus();
    if (cameraTakingPhoto || cameraPreviewRunning) {
        setText("cvar1", "拍照中, 请稍后...", "page5");
    } else if (cameraCurrentFile) {
        setText("cvar1", "加载最后拍摄的图片...", "page5");
        setImageSrc(
            "camera-image",
            "/api/camera/getImage?file=" + encodeURIComponent(cameraCurrentFile),
            true
        );
    }
    connectLog("yfkj-camera-capture.service", "text1");
}

function exitPage5() {
    if (cameraPreviewRunning) {
        stopCameraPreview();
    }
    disconnectLog();
}