/**
 * @author Usman Naeem
 */

var economic_event_list = null;
//var pre_event_impact_delay = 1000 * 60 * 60 * 6;
var present_event_impact_delay = 1000 * 60 * 60 * 1;
//var post_event_impact_delay = 1000 * 60 * 60 * 5;
var event_date_format_options = {
    timeZone: 'America/New_York', /*timeZoneName: 'short',*/
    weekday: 'short', /*year: 'numeric',*/ month: 'short', day: 'numeric'
};
var event_time_format_options = {
    timeZone: 'America/New_York', /*timeZoneName: 'short',*/
    hour: '2-digit',
    minute: '2-digit',
    hour12: true
};
//
var loadingEconomicCalendar = false;
var closestDisplayedEventNumber = -1;
var economic_calendar_cashe_expiry_time = 0;
//
const economic_event_div_container_auto_update_delay = 1000 * 5;
var economic_event_div_container_auto_update_time = 0;
//
const highest_economic_event_check_delay = 1000 * 10;
var highest_economic_event_check_time = 0;
var highest_economic_event_impact = "no";

async function enableEconomicCalendarPage() {
    try {
        addLoader();
        setPage(economic_calendar_page);
        addHeader(true);
        addFooter();
        const messageboxElement = getElement("economic_calendar_message_box");
        messageboxElement.innerHTML = "";

        await load_user(messageboxElement).then(() => {
        }).catch(error => {
            handleError(error, "economic_calendar_message_box", true);
            enableLoginPage();
            return;
        });

//        const pre_event_impact_delay_hours = getElement("pre_event_impact_delay_hours").value;
//        pre_event_impact_delay = 1000 * 60 * 60 * pre_event_impact_delay_hours;
//        
//        const post_event_impact_delay_hours = getElement("post_event_impact_delay_hours").value;
//        post_event_impact_delay = 1000 * 60 * 60 * post_event_impact_delay_hours;


        const load_economic_calendar = loadEconomicCalendar();

        await load_economic_calendar.finished;
        await update_economic_event_div_container(true, true);
        removeLoader();
        await jumpToClosestEvent();
    } catch (error) {
        handleError(error, "economic_calendar_message_box", true);
        removeLoader();
    }
}

async function loadEconomicCalendar() {
    try {
        if (loadingEconomicCalendar) {
            return;
        }
        const current_time = Date.now();
        if (economic_calendar_cashe_expiry_time > current_time) {
            return;
        }
        economic_calendar_cashe_expiry_time = current_time + cache_expiry_delay;
        loadingEconomicCalendar = true;

        const economicCalendarMessageboxElement = getElement("economic_calendar_message_box");
        economicCalendarMessageboxElement.innerHTML = "";

        var url = "GetEconomicCalendarOfThisWeek";
        if (isCompressionSupported()) {
            url += "?compress=true&encode=true";
        }
        const json = await callWebserviceGET(url, economicCalendarMessageboxElement, null);
        if (json.code !== 200) {
            if (economicCalendarMessageboxElement) {
                economicCalendarMessageboxElement.innerHTML = json.message;
            }
        } else {
            var compressed = json.compressed;
            var encoded = json.encoded;
            var economicCalendar = json.economic_calendar;

            //
            if (compressed || encoded) {
                if (compressed) {
                    await unzipGzipString(economicCalendar, encoded).then((unzipped) => {
                        economicCalendar = unzipped;
                        encoded = false;
                    }).catch((error) => {
                        console.error("Error unzipping:", error);
                        throw error;
                    });
                } else if (encoded) {
                    if (encoded) {
                        economicCalendar = window.atob(economicCalendar);
                    }
                }
                economicCalendar = JSON.parse(economicCalendar);
            }
            economic_event_list = new Array();
            economicCalendar.economic_events.forEach(economicEvent => {
                economic_event_list.push(economicEvent);
            });
            economic_event_list = economic_event_list.sort(function (a, b) {
                return a.time - b.time;
            });
            _updateHighestEconomicEventImpactIndicator(false);
        }
    } catch (error) {
        console.log(error);
        handleError("Failed to get load economic events " + error, "economic_calendar_message_box", false);
    }
    loadingEconomicCalendar = false;
}


async function refreshEconomicCalendar() {
    try {
        if (loadingEconomicCalendar) {
            return;
        }
        economic_calendar_cashe_expiry_time = 0;
        addLoader();
        //closeEconomicCalendarSettings();
        await loadEconomicCalendar().then(() => {
            update_economic_event_div_container(true, true);
            removeLoader();
        });
    } catch (error) {
        handleError(error, "economic_calendar_message_box", true);
        removeLoader();
    }
}

async function update_economic_event_div_container(animate, checkHighestEconomicEventImpactIndicator) {
    closestDisplayedEventNumber = -1;

    const economic_event_div_container = getElement("economic_event_div_container");
    economic_event_div_container.innerHTML = "";


    const timezoneElement = getElement("timezone");
    var selected_timezone = timezoneElement.value ? timezoneElement.value : user_json.timezone;

    event_date_format_options.timeZone = selected_timezone;
    const eventDateFormater = new Intl.DateTimeFormat('en-US', event_date_format_options);

    event_time_format_options.timeZone = selected_timezone;
    const eventTimeFormater = new Intl.DateTimeFormat('en-US', event_time_format_options);

    const current_time = Date.now();


    const economic_calendar_filter_past_hours = getElement("economic_calendar_filter_past_hours");
    const economic_calendar_filter_future_hours = getElement("economic_calendar_filter_future_hours");
    if (!isNumeric(economic_calendar_filter_past_hours.value)) {
        economic_calendar_filter_past_hours.value = 1;
    }
    if (!isNumeric(economic_calendar_filter_future_hours.value)) {
        economic_calendar_filter_future_hours.value = 1;
    }
    const startTimeLimit = current_time - (1000 * 60 * 60 * economic_calendar_filter_past_hours.value);
    const endTimeLimit = current_time + (1000 * 60 * 60 * economic_calendar_filter_future_hours.value);

    const pre_event_impact_delay_hours = getElement("pre_event_impact_delay_hours");
    if (!isNumeric(pre_event_impact_delay_hours.value)) {
        pre_event_impact_delay_hours.value = 1;
    }
    const pre_event_impact_delay = 1000 * 60 * 60 * pre_event_impact_delay_hours.value;

    const post_event_impact_delay_hours = getElement("post_event_impact_delay_hours");
    if (!isNumeric(post_event_impact_delay_hours.value)) {
        post_event_impact_delay_hours.value = 1;
    }
    const post_event_impact_delay = 1000 * 60 * 60 * post_event_impact_delay_hours.value;

    const economic_calendar_filter_high_impact = getElement("economic_calendar_filter_high_impact").checked;
    const economic_calendar_filter_medium_impact = getElement("economic_calendar_filter_medium_impact").checked;
    const economic_calendar_filter_low_impact = getElement("economic_calendar_filter_low_impact").checked;
    var all_impact = false;
    if (!economic_calendar_filter_high_impact && !economic_calendar_filter_medium_impact && !economic_calendar_filter_low_impact) {
        all_impact = true;
    }

    const economic_calendar_filter_US = getElement("economic_calendar_filter_US").checked;
    const economic_calendar_filter_JP = getElement("economic_calendar_filter_JP").checked;
    const economic_calendar_filter_EU = getElement("economic_calendar_filter_EU").checked;
    const economic_calendar_filter_GB = getElement("economic_calendar_filter_GB").checked;
    const economic_calendar_filter_CH = getElement("economic_calendar_filter_CH").checked;
    const economic_calendar_filter_CA = getElement("economic_calendar_filter_CA").checked;
    const economic_calendar_filter_AU = getElement("economic_calendar_filter_AU").checked;
    const economic_calendar_filter_NZ = getElement("economic_calendar_filter_NZ").checked;
    var all_location = false;
    if (!economic_calendar_filter_US && !economic_calendar_filter_JP && !economic_calendar_filter_EU && !economic_calendar_filter_GB && !economic_calendar_filter_CH && !economic_calendar_filter_CA && !economic_calendar_filter_AU && !economic_calendar_filter_NZ) {
        all_location = true;
    }

    //
    var closestEventTimeGap = current_time;
    var closestEventNumber = 0;



    var eventNumber = 0;
    if (economic_event_list) {
        await economic_event_list.forEach(economicEvent => {
            var ok = true;
            if (economicEvent.time < startTimeLimit || economicEvent.time > endTimeLimit) {
                ok = false;
            }

            if (ok) {
                if (!all_impact) {
                    if (economicEvent.impact === "unknown") {
                        ok = false;
                    } else if (economicEvent.impact === "high") {
                        ok = economic_calendar_filter_high_impact;
                    } else if (economicEvent.impact === "medium") {
                        ok = economic_calendar_filter_medium_impact;
                    } else if (economicEvent.impact === "low") {
                        ok = economic_calendar_filter_low_impact;
                    } else {
                        ok = false;
                    }
                }
                if (ok) {
                    if (!all_location) {
                        if (economicEvent.location === "US") {
                            ok = economic_calendar_filter_US;
                        } else if (economicEvent.location === "JP") {
                            ok = economic_calendar_filter_JP;
                        } else if (economicEvent.location === "EU") {
                            ok = economic_calendar_filter_EU;
                        } else if (economicEvent.location === "GB") {
                            ok = economic_calendar_filter_GB;
                        } else if (economicEvent.location === "CH") {
                            ok = economic_calendar_filter_CH;
                        } else if (economicEvent.location === "CA") {
                            ok = economic_calendar_filter_CA;
                        } else if (economicEvent.location === "AU") {
                            ok = economic_calendar_filter_AU;
                        } else if (economicEvent.location === "NZ") {
                            ok = economic_calendar_filter_NZ;
                        } else {
                            ok = false;
                        }
                    }
                }
            }
            if (ok) {
                eventNumber += 1;
                add_economic_event_div(eventNumber, current_time, pre_event_impact_delay, post_event_impact_delay, economicEvent.time, economicEvent.location, economicEvent.currency, economicEvent.title, economicEvent.impact, economicEvent.previous, economicEvent.forecast, economicEvent.actual, eventDateFormater, eventTimeFormater);

                //
                if (current_time > economicEvent.time || Math.abs(current_time - economicEvent.time) < closestEventTimeGap) {
                    closestEventTimeGap = Math.abs(current_time - economicEvent.time);
                    closestEventNumber = eventNumber;
                }
            }
        });
    }

    if (eventNumber === 0) {
        var noEventDiv = "<div id='no_economic_event_div' class='no_economic_event_div' style='pointer-events: auto;'>" + "No economic event to display." + "</div>";
        const economic_event_div_container = getElement("economic_event_div_container");
        economic_event_div_container.innerHTML += noEventDiv;
    }
    closestDisplayedEventNumber = closestEventNumber;

    if (animate) {
        economic_event_div_container.style.transformOrigin = "right";
        economic_event_div_container.animate([
            {opacity: 1, transform: 'scaleX(0)'},
            {opacity: 1, transform: 'scaleX(1)'}
        ], {duration: 350, easing: 'ease-in-out'});
    }

    economic_event_div_container_auto_update_time = current_time + economic_event_div_container_auto_update_delay;

    //
    if (checkHighestEconomicEventImpactIndicator) {
        _updateHighestEconomicEventImpactIndicator(false);
    }
}


async function add_economic_event_div(n, current_time, pre_event_impact_delay, post_event_impact_delay, event_time, location, currency, title, impact, previous, forecast, actual, dateFormater, timeFormater) {
    const date = new Date(event_time);
    const pre_impact_start_time = event_time - pre_event_impact_delay;
    const present_impact_end_time = event_time + present_event_impact_delay;
    const post_impact_end_time = present_impact_end_time + post_event_impact_delay;

    const impact_over = current_time > present_impact_end_time;
    const impact_occuring = !impact_over && current_time > event_time;
    const impact_recent = impact_over && !impact_occuring && current_time < post_impact_end_time;
    const impact_approaching = current_time < event_time && current_time > pre_impact_start_time;

    var eventDiv = "<div id='economic_event_div_" + n + "' class='economic_event_div economic_event_div_" + impact + "' style='pointer-events: auto;'>";

    eventDiv += "<div class='calendar_event_impact calendar_event_impact_" + impact + "'></div>";

    eventDiv += "<div class='calendar_event_info'>";
    eventDiv += "<div class='calendar_event_location calendar_event_location_" + (current_time > present_impact_end_time ? "impact_over" : impact) + "'>" + location + "</div>";
    eventDiv += "</div>";

    eventDiv += "<div class='calendar_event_detail calendar_event_detail_" + (current_time > present_impact_end_time ? "impact_over" : (current_time > event_time) ? "impact_occuring" : impact) + "'>";

    eventDiv += "<div class='calendar_event_datetime calendar_event_datetime_" + impact + "'>";
    eventDiv += "<div class='calendar_event_time'>";
    eventDiv += (impact_recent ? "<span class='calendar_event_recent_indicator'>*</span>" : impact_occuring ? "<span class='calendar_event_occuring_indicator'>*</span>" : (impact_approaching ? "<span class='calendar_event_approaching_indicator'>*</span>" : ""));
    eventDiv += timeFormater.format(date);
    if (impact_approaching || impact_recent) {
        const timeDifference = Math.abs(event_time - current_time);
        const totalMinutes = Math.floor(timeDifference / (1000 * 60));
        const totalHours = Math.floor(timeDifference / (1000 * 60 * 60));
        const hours = Math.floor(timeDifference / 3600000);
        const minutes = Math.floor((timeDifference % 3600000) / 60000);
        eventDiv += "<span class='calendar_event_approacing_time'>";
        eventDiv += (impact_recent ? "-" : "");
        eventDiv += (hours > 0 ? hours + "h " : "");
        eventDiv += (minutes > 0 ? minutes + "m " : "");
        eventDiv += "</span>";
    }
    eventDiv += "</div>";
    eventDiv += "<div class='calendar_event_date'>" + dateFormater.format(date) + "</div>";
    eventDiv += "</div>";






    eventDiv += "<div class='calendar_event_description'>";
    eventDiv += "<div class='calendar_event_title'>" + title + "<span class='calendar_event_title_impact'><br/>[ " + impact + " impact event ]" + "</span></div>";
    eventDiv += "<div class='calendar_event_values'>" + (forecast ? forecast : "na") + "<br/>" + (previous ? previous : "na") + "<br/>" + (actual ? actual : "") + "</div>";
    eventDiv += "</div>";

    eventDiv += "</div>";

    eventDiv += "</div>";
    const economic_event_div_container = getElement("economic_event_div_container");
    economic_event_div_container.innerHTML += eventDiv;
}

async function jumpToClosestEvent() {
    if (closestDisplayedEventNumber > 0) {
        const closestDisplayedEventDiv = getElement("economic_event_div_" + closestDisplayedEventNumber);
        closestDisplayedEventDiv.scrollIntoView({
            behavior: 'auto',
            block: 'center',
            inline: 'end'
        });

        await sleep(200);

        const animation1 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(1.0)'},
            {opacity: 1, transform: 'scaleX(1.1)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation1.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(1.2)";

        const animation2 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(1.1)'},
            {opacity: 1, transform: 'scaleX(0.8)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation2.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(0.8)";

        const animation3 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(0.8)'},
            {opacity: 1, transform: 'scaleX(1.07)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation3.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(1.07)";

        const animation4 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(1.07)'},
            {opacity: 1, transform: 'scaleX(0.9)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation4.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(0.9)";

        const animation5 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(0.9)'},
            {opacity: 1, transform: 'scaleX(1.03)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation5.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(1.03)";

        const animation6 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(1.03)'},
            {opacity: 1, transform: 'scaleX(0.97)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation6.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(0.97)";

        const animation7 = closestDisplayedEventDiv.animate([
            {opacity: 1, transform: 'scaleX(0.97)'},
            {opacity: 1, transform: 'scaleX(1.0)'}
        ], {duration: 200, easing: 'ease-in-out'});
        await animation7.finished;
        closestDisplayedEventDiv.style.transform = "scaleX(1.0)";

        closestDisplayedEventDiv.style.transform = "scaleY(1.0)";
        closestDisplayedEventDiv.style.opacity = 1;
    }
}

function closeEconomicCalendarSettings() {
    const calendar_refresh_btn = getElement('calendar_refresh_btn');
    calendar_refresh_btn.style.display = "none";
    const calendar_jump_btn = getElement('calendar_jump_btn');
    calendar_jump_btn.style.display = "none";
    const calendar_close_btn = getElement('calendar_close_btn');
    calendar_close_btn.style.display = "none";
    const calendar_settings_container = getElement('calendar_settings_container');
    calendar_settings_container.style.display = "none";
    const calendar_settings_link = getElement('calendar_settings_link');
    calendar_settings_link.style.display = "block";
}

function openEconomicCalendarSettings() {
    const calendar_settings_link = getElement('calendar_settings_link');
    calendar_settings_link.style.display = "none";
    const calendar_refresh_btn = getElement('calendar_refresh_btn');
    calendar_refresh_btn.style.display = "block";
    const calendar_jump_btn = getElement('calendar_jump_btn');
    calendar_jump_btn.style.display = "block";

    const calendar_close_btn = getElement('calendar_close_btn');
    calendar_close_btn.style.display = "block";

    const calendar_settings_container = getElement('calendar_settings_container');
    calendar_settings_container.style.display = "block";
    calendar_settings_container.animate([
        {opacity: 1, transform: 'scale(0)'},
        {opacity: 1, transform: 'scale(1)'}
    ], {duration: 350, easing: 'ease-in-out'});
}

//
function updateHighestEconomicEventImpactIndicator(currentTime) {
    try {
        if (currentTime < highest_economic_event_check_time) {
            return;
        }
        _updateHighestEconomicEventImpactIndicator(true);
    } catch (err) {
        console.log(err);
    }
}

function _updateHighestEconomicEventImpactIndicator(reload_economic_calendar) {
    const currentTime = Date.now();
    highest_economic_event_check_time = currentTime + highest_economic_event_check_delay;
    //
    var impact;
    const economic_calendar_filter_event_indicator = getElement("economic_calendar_filter_event_indicator");
    if (!economic_calendar_filter_event_indicator.checked) {
        highest_economic_event_impact = "no";
    } else {
        const post_event_indicator_minutes = getElement("post_event_indicator_minutes");
        const pre_event_indicator_minutes = getElement("pre_event_indicator_minutes");
        if (!isNumeric(post_event_indicator_minutes.value)) {
            post_event_indicator_minutes.value = 1;
        }
        if (!isNumeric(pre_event_indicator_minutes.value)) {
            pre_event_indicator_minutes.value = 1;
        }
        const startTime = currentTime - (1000 * 60 * post_event_indicator_minutes.value);
        const endTime = currentTime + (1000 * 60 * pre_event_indicator_minutes.value);

        impact = getCurrentlyHighestImpactingEconomicEventImpact(reload_economic_calendar, startTime, endTime);
        highest_economic_event_impact = impact === null ? "no" : impact;
    }
    const header = getElement("header");
    header.setAttribute("class", "header " + highest_economic_event_impact + "-economic-event-impact-header");
}

function getCurrentlyHighestImpactingEconomicEventImpact(reload_economic_calendar, startTimeLimit, endTimeLimit) {
    if (reload_economic_calendar) {
        loadEconomicCalendar();
    }

    if (!economic_event_list) {
        return null;
    }
    //
    const economic_calendar_filter_US = getElement("economic_calendar_filter_US").checked;
    const economic_calendar_filter_JP = getElement("economic_calendar_filter_JP").checked;
    const economic_calendar_filter_EU = getElement("economic_calendar_filter_EU").checked;
    const economic_calendar_filter_GB = getElement("economic_calendar_filter_GB").checked;
    const economic_calendar_filter_CH = getElement("economic_calendar_filter_CH").checked;
    const economic_calendar_filter_CA = getElement("economic_calendar_filter_CA").checked;
    const economic_calendar_filter_AU = getElement("economic_calendar_filter_AU").checked;
    const economic_calendar_filter_NZ = getElement("economic_calendar_filter_NZ").checked;
    var all_location = false;
    if (!economic_calendar_filter_US && !economic_calendar_filter_JP && !economic_calendar_filter_EU && !economic_calendar_filter_GB && !economic_calendar_filter_CH && !economic_calendar_filter_CA && !economic_calendar_filter_AU && !economic_calendar_filter_NZ) {
        all_location = true;
    }
    //
    const economic_calendar_filter_high_impact = getElement("economic_calendar_filter_high_impact").checked;
    const economic_calendar_filter_medium_impact = getElement("economic_calendar_filter_medium_impact").checked;
    const economic_calendar_filter_low_impact = getElement("economic_calendar_filter_low_impact").checked;
    var all_impact = false;
    if (!economic_calendar_filter_high_impact && !economic_calendar_filter_medium_impact && !economic_calendar_filter_low_impact) {
        all_impact = true;
    }
    //
    var highestImpact = null;
    economic_event_list.forEach(economicEvent => {
        var ok = true;

        if (economicEvent.time < startTimeLimit || economicEvent.time > endTimeLimit) {
            ok = false;
        } else if (highestImpact === "high") {
            ok = false;
        } else if (highestImpact === "medium" && economicEvent.impact !== "high") {
            ok = false;
        } else if ((highestImpact === "low" || highestImpact === "unknown") && (economicEvent.impact !== "high" && economicEvent.impact !== "medium")) {
            ok = false;
        }

        if (ok) {
            if (!all_impact) {
                if (economicEvent.impact === "unknown") {
                    ok = false;
                } else if (economicEvent.impact === "high") {
                    ok = economic_calendar_filter_high_impact;
                } else if (economicEvent.impact === "medium") {
                    ok = economic_calendar_filter_medium_impact;
                } else if (economicEvent.impact === "low") {
                    ok = economic_calendar_filter_low_impact;
                } else {
                    ok = false;
                }
            }
            if (ok) {
                if (!all_location) {
                    if (economicEvent.location === "US") {
                        ok = economic_calendar_filter_US;
                    } else if (economicEvent.location === "JP") {
                        ok = economic_calendar_filter_JP;
                    } else if (economicEvent.location === "EU") {
                        ok = economic_calendar_filter_EU;
                    } else if (economicEvent.location === "GB") {
                        ok = economic_calendar_filter_GB;
                    } else if (economicEvent.location === "CH") {
                        ok = economic_calendar_filter_CH;
                    } else if (economicEvent.location === "CA") {
                        ok = economic_calendar_filter_CA;
                    } else if (economicEvent.location === "AU") {
                        ok = economic_calendar_filter_AU;
                    } else if (economicEvent.location === "NZ") {
                        ok = economic_calendar_filter_NZ;
                    } else {
                        ok = false;
                    }
                }
            }
            if (ok) {
                highestImpact = economicEvent.impact;
                if (highestImpact === "high") {
                    return "high";
                }
            }
        }
    });
    return highestImpact;
}