var ftpCameraActualImagesObj = new Object();

function ftpCameraActualImageObj(id) {
    this.id = id;
    this.sensor = null;
    this.width = null;
    this.height = null;
    this.refresh_period = null;
    this.has_description = null;
    this.has_timestamp = null;
    this.hash_key = null;

    this.setParams = function () {
        var nowDate = new Date();
        this.sensor = $(
            "ftpCameraActualImage_hidden_sensor_id_" + this.id
        ).value;
        this.width = $("ftpCameraActualImage_hidden_width_id_" + this.id).value;
        this.height = $(
            "ftpCameraActualImage_hidden_height_id_" + this.id
        ).value;
        this.refresh_period = $(
            "ftpCameraActualImage_hidden_refresh_period_id_" + this.id
        ).value;
        this.has_description = $(
            "ftpCameraActualImage_hidden_has_description_id_" + this.id
        ).value;
        this.has_timestamp = $(
            "ftpCameraActualImage_hidden_has_timestamp_id_" + this.id
        ).value;
        this.resample = $(
            "ftpCameraActualImage_hidden_resample_id_" + this.id
        ).value;
        this.time_old = $(
            "ftpCameraActualImage_hidden_time_old_id_" + this.id
        ).value;
        if (
            $("ftpCameraActualImage_hidden_direction_id_" + this.id) !=
            undefined
        )
            this.direction_id = $(
                "ftpCameraActualImage_hidden_direction_id_" + this.id
            ).value;
        this.lang = $("ftpCameraActualImage_hidden_lang_id_" + this.id).value;
        this.next_time_refresh = nowDate.getTime() / 1000;
    };

    this.reload = function () {
        var nowDate = new Date();

        // unikatni id kvuli refresovani a cache-ovani obrazku -> zpusobuje vzdy refresh
        var unique_number = Math.floor(Math.random() * 10000000);

        // zmena obrazku
        var img_element = $("ftpCameraActualImage_img_id_" + this.id);

        if (img_element) {
            img_element.src =
                imageProviderUrl +
                "?sensor=" +
                this.sensor +
                "&di=" +
                this.direction_id +
                "&w=" +
                this.width +
                "&h=" +
                this.height +
                "&to=" +
                this.time_old +
                "&ht=" +
                this.has_timestamp +
                "&resample=" +
                this.resample +
                "&lang=" +
                this.lang +
                "&unique=" +
                unique_number +
                "&hash_key=" +
                ftpCameraActualImagesObj.hash_key;
        }

        // zmena desc
        if (this.has_description == true) {
            var desc_element = $("ftpCameraActualImage_span_id_" + this.id);
            if (desc_element)
                desc_element.innerHTML =
                    "Poslední obnova snímku : " + getActualTimestamp();
        }
        this.next_time_refresh =
            nowDate.getTime() / 1000 + 1 * this.refresh_period;
    };

    return this;
}

function ftpCameraActualImageFunctionInit() {
    ftpCameraActualImagesObj.getImages = function () {
        this.images = new Object();
        this.images_count = 0;
        this.status = new Object();
        var i = 1;
        var image_element = $("ftpCameraActualImage_div_id_" + i);

        while (image_element != null) {
            this.images[i] = new ftpCameraActualImageObj(i);
            this.images[i].setParams();
            this.images_count = this.images_count + 1;
            this.status[i] = "initialize";
            i = i + 1;
            image_element = $("ftpCameraActualImage_div_id_" + i);
        }
    };

    ftpCameraActualImagesObj.findNextReloadedImage = function () {
        var nowDate = new Date();
        var actual_time = nowDate.getTime() / 1000;
        var find_image = new Object();
        find_image.id = null;
        find_image.time = null;
        find_image.reload = null;

        // hledam jakykoliv cekajici obrazek
        for (i = 1; i <= this.images_count; i++) {
            if (this.status[i] == "waiting") {
                find_image.id = i;
                find_image.time = this.images[i].next_time_refresh;
                find_image.reload = false;
            }
        }

        // zadny neceka na reload
        if (find_image.id == null) return find_image;

        // ted hledam prvni ktery je v poradi na reload
        for (i = 1; i <= this.images_count; i++) {
            if (
                find_image.time > this.images[i].next_time_refresh &&
                this.status[i] == "waiting"
            ) {
                find_image.id = i;
                find_image.time = this.images[i].next_time_refresh;
            }
        }

        if (find_image.time <= actual_time) find_image.reload = true;
        else find_image.reload = false;
        return find_image;
    };

    ftpCameraActualImagesObj.startRefreshing = function () {
        for (var sss in this.status) {
            if (this.status[sss] == "initialize") {
                this.status[sss] = "loading";
                this.images[sss].reload();
            }
        }
        var next_reloaded = this.findNextReloadedImage();
        if (next_reloaded.reload == true) {
            this.status[next_reloaded.id] = "loading";
            setTimeout("ftpCameraActualImagesObj.startRefreshing()", 1);
            this.images[next_reloaded.id].reload();
            return true;
        }
        setTimeout("ftpCameraActualImagesObj.startRefreshing()", 1000);
    };

    ftpCameraActualImagesObj.init = function () {
        this.getImages();
        this.startRefreshing();
    };

    ftpCameraActualImagesObj.getHashKey = function () {
        new Ajax.Request("/Discoverer/Tools/get-hash-key/", {
            method: "post",
            parameters: {},
            onComplete: function (transport) {
                ftpCameraActualImagesObj.hash_key = transport.responseText;
                setTimeout("ftpCameraActualImagesObj.getHashKey()", 60000);
            },
        });
    };

    new Ajax.Request("/Discoverer/Tools/get-hash-key/", {
        method: "post",
        parameters: {},
        onComplete: function (transport) {
            ftpCameraActualImagesObj.hash_key = transport.responseText;
            setTimeout("ftpCameraActualImagesObj.getHashKey()", 60000);
            ftpCameraActualImagesObj.init();
        },
    });

    ftpCameraActualImagesObj.status = function () {
        return this.status;
    };
}

changeImage = function (image) {
    document.getElementById("first").style.display = "none";
    var images = document.getElementsByClassName("change");

    for (var im = 0; im < images.length; im++) {
        if (images[im].id == image)
            document.getElementById(image).style.display = "block";
        else document.getElementById(images[im].id).style.display = "none";
    }
};