/* eslint-disable unicorn/filename-case */

import ical, { ICalEventData, ICalEventStatus } from "ical-generator";

import {
    getWorkOrderMilestones,
    WorkOrderMilestoneFilters
} from "../../helpers/lotOccupancyDB/getWorkOrderMilestones.js";

import type { RequestHandler } from "express";

import * as configFunctions from "../../helpers/functions.config.js";
import { getPrintConfig } from "../../helpers/functions.print.js";

const timeStringSplitRegex = /[ :-]/;

function escapeHTML(stringToEscape: string) {
    return stringToEscape.replace(/[^\d A-Za-z]/g, (c) => "&#" + c.codePointAt(0) + ";");
}

export const handler: RequestHandler = (request, response) => {
    const urlRoot =
        "http://" +
        request.hostname +
        (configFunctions.getProperty("application.httpPort") === 80
            ? ""
            : ":" + configFunctions.getProperty("application.httpPort")) +
        configFunctions.getProperty("reverseProxy.urlPrefix");

    /*
     * Get work order milestones
     */

    const workOrderMilestoneFilters: WorkOrderMilestoneFilters = {
        workOrderTypeIds: request.query.workOrderTypeIds as string,
        workOrderMilestoneTypeIds: request.query.workOrderMilestoneTypeIds as string
    };

    if (request.query.workOrderId) {
        workOrderMilestoneFilters.workOrderId = request.query.workOrderId as string;
    } else {
        workOrderMilestoneFilters.workOrderMilestoneDateFilter = "recent";
    }

    const workOrderMilestones = getWorkOrderMilestones(workOrderMilestoneFilters, {
        includeWorkOrders: true,
        orderBy: "date"
    });

    /*
     * Create calendar object
     */

    const calendar = ical({
        name: "Work Order Milestone Calendar",
        url: urlRoot + "/workOrders"
    });

    if (request.query.workOrderId && workOrderMilestones.length > 0) {
        calendar.name("Work Order #" + workOrderMilestones[0].workOrderNumber);
        calendar.url(urlRoot + "/workOrders/" + workOrderMilestones[0].workOrderId);
    }

    calendar.prodId({
        company: "cityssm.github.io",
        product: configFunctions.getProperty("application.applicationName")
    });

    /*
     * Loop through milestones
     */

    for (const milestone of workOrderMilestones) {
        const milestoneTimePieces = (
            milestone.workOrderMilestoneDateString +
            " " +
            milestone.workOrderMilestoneTimeString
        ).split(timeStringSplitRegex);

        const milestoneDate = new Date(
            Number.parseInt(milestoneTimePieces[0], 10),
            Number.parseInt(milestoneTimePieces[1], 10) - 1,
            Number.parseInt(milestoneTimePieces[2], 10),
            Number.parseInt(milestoneTimePieces[3], 10),
            Number.parseInt(milestoneTimePieces[4], 10)
        );

        const milestoneEndDate = new Date(milestoneDate.getTime());
        milestoneEndDate.setHours(milestoneEndDate.getHours() + 1);

        // Build summary (title in Outlook)

        let summary =
            (milestone.workOrderMilestoneCompletionDate ? "✔ " : "") +
            (milestone.workOrderMilestoneTypeId
                ? milestone.workOrderMilestoneType
                : milestone.workOrderMilestoneDescription
            ).trim();

        if (milestone.workOrderLotOccupancies.length > 0) {
            let occupantCount = 0;

            for (const lotOccupancy of milestone.workOrderLotOccupancies) {
                for (const occupant of lotOccupancy.lotOccupancyOccupants) {
                    occupantCount += 1;

                    if (occupantCount === 1) {
                        if (summary !== "") {
                            summary += ": ";
                        }

                        summary += occupant.occupantName;
                    }
                }
            }

            if (occupantCount > 1) {
                summary += " plus " + (occupantCount - 1);
            }
        }

        // Build URL

        const workOrderURL = urlRoot + "/workOrders/" + milestone.workOrderId;

        // Create event

        const eventData: ICalEventData = {
            start: milestoneDate,
            created: new Date(milestone.recordCreate_timeMillis),
            stamp: new Date(milestone.recordCreate_timeMillis),
            lastModified: new Date(
                Math.max(
                    milestone.recordUpdate_timeMillis,
                    milestone.workOrderRecordUpdate_timeMillis
                )
            ),
            allDay: !milestone.workOrderMilestoneTime,
            summary,
            url: workOrderURL
        };

        if (!eventData.allDay) {
            eventData.end = milestoneEndDate;
        }

        const calendarEvent = calendar.createEvent(eventData);

        // Build description

        let descriptionHTML =
            "<h1>Milestone Description</h1>" +
            "<p>" +
            escapeHTML(milestone.workOrderMilestoneDescription) +
            "</p>" +
            "<h2>Work Order #" +
            milestone.workOrderNumber +
            "</h2>" +
            ("<p>" + escapeHTML(milestone.workOrderDescription) + "</p>") +
            ("<p>" + workOrderURL + "</p>");

        if (milestone.workOrderLotOccupancies.length > 0) {
            descriptionHTML +=
                "<h2>Related " +
                escapeHTML(configFunctions.getProperty("aliases.occupancies")) +
                "</h2>" +
                '<table border="1"><thead><tr>' +
                ("<th>" +
                    escapeHTML(configFunctions.getProperty("aliases.occupancy")) +
                    " Type</th>") +
                ("<th>" + escapeHTML(configFunctions.getProperty("aliases.lot")) + "</th>") +
                "<th>Start Date</th>" +
                "<th>End Date</th>" +
                ("<th>" + escapeHTML(configFunctions.getProperty("aliases.occupants")) + "</th>") +
                "</tr></thead>" +
                "<tbody>";

            for (const occupancy of milestone.workOrderLotOccupancies) {
                descriptionHTML +=
                    "<tr>" +
                    ("<td>" +
                        '<a href="' +
                        urlRoot +
                        "/lotOccupancies/" +
                        occupancy.lotOccupancyId +
                        '">' +
                        escapeHTML(occupancy.occupancyType) +
                        "</a></td>") +
                    ("<td>" +
                        (occupancy.lotName ? escapeHTML(occupancy.lotName) : "(Not Set)") +
                        "</td>") +
                    ("<td>" + occupancy.occupancyStartDateString + "</td>") +
                    "<td>" +
                    (occupancy.occupancyEndDate
                        ? occupancy.occupancyEndDateString
                        : "(No End Date)") +
                    "</td>" +
                    "<td>";

                for (const occupant of occupancy.lotOccupancyOccupants) {
                    descriptionHTML += escapeHTML(occupant.lotOccupantType) + ": " + escapeHTML(occupant.occupantName) + "<br />";
                }

                descriptionHTML += "</td>" + "</tr>";
            }

            descriptionHTML += "</tbody></table>";
        }

        if (milestone.workOrderLots.length > 0) {
            descriptionHTML +=
                "<h2>Related " +
                escapeHTML(configFunctions.getProperty("aliases.lots")) +
                "</h2>" +
                '<table border="1"><thead><tr>' +
                ("<th>" + escapeHTML(configFunctions.getProperty("aliases.lot")) + " Type</th>") +
                ("<th>" + escapeHTML(configFunctions.getProperty("aliases.map")) + "</th>") +
                ("<th>" +
                    escapeHTML(configFunctions.getProperty("aliases.lot")) +
                    " Type" +
                    "</th>") +
                "<th>Status</th>" +
                "</tr></thead>" +
                "<tbody>";

            for (const lot of milestone.workOrderLots) {
                descriptionHTML +=
                    "<tr>" +
                    ("<td>" +
                        '<a href="' +
                        urlRoot +
                        "/lots/" +
                        lot.lotId +
                        '">' +
                        escapeHTML(lot.lotName) +
                        "</a></td>") +
                    ("<td>" + escapeHTML(lot.mapName) + "</td>") +
                    ("<td>" + escapeHTML(lot.lotType) + "</td>") +
                    ("<td>" + escapeHTML(lot.lotStatus) + "</td>") +
                    "</tr>";
            }

            descriptionHTML += "</tbody></table>";
        }

        const prints = configFunctions.getProperty("settings.workOrders.prints");

        if (prints.length > 0) {
            descriptionHTML += "<h2>Prints</h2>";

            for (const printName of prints) {
                const printConfig = getPrintConfig(printName);

                if (printConfig) {
                    descriptionHTML +=
                        "<p>" +
                        escapeHTML(printConfig.title) +
                        "<br />" +
                        (urlRoot +
                            "/print/" +
                            printName +
                            "/?workOrderId=" +
                            milestone.workOrderId) +
                        "</p>";
                }
            }
        }

        calendarEvent.description({
            plain: workOrderURL,
            html: descriptionHTML
        });

        // Set status

        if (milestone.workOrderMilestoneCompletionDate) {
            calendarEvent.status(ICalEventStatus.CONFIRMED);
        }

        // Add categories

        if (milestone.workOrderMilestoneTypeId) {
            calendarEvent.createCategory({
                name: milestone.workOrderMilestoneType
            });

            calendarEvent.createCategory({
                name: milestone.workOrderType
            });
        }

        if (milestone.workOrderMilestoneCompletionDate) {
            calendarEvent.createCategory({
                name: "Completed"
            });
        }

        // Set location

        if (milestone.workOrderLots.length > 0) {
            const lotNames = [];

            for (const lot of milestone.workOrderLots) {
                lotNames.push(lot.mapName + ": " + lot.lotName);
            }

            calendarEvent.location(lotNames.join(", "));
        }

        // Set organizer / attendees

        if (milestone.workOrderLotOccupancies.length > 0) {
            let organizerSet = false;
            for (const lotOccupancy of milestone.workOrderLotOccupancies) {
                for (const occupant of lotOccupancy.lotOccupancyOccupants) {
                    if (organizerSet) {
                        calendarEvent.createAttendee({
                            name: occupant.occupantName,
                            email: configFunctions.getProperty(
                                "settings.workOrders.calendarEmailAddress"
                            )
                        });
                    } else {
                        calendarEvent.organizer({
                            name: occupant.occupantName,
                            email: configFunctions.getProperty(
                                "settings.workOrders.calendarEmailAddress"
                            )
                        });
                        organizerSet = true;
                    }
                }
            }
        } else {
            calendarEvent.organizer({
                name: milestone.recordCreate_userName,
                email: configFunctions.getProperty("settings.workOrders.calendarEmailAddress")
            });
        }
    }

    calendar.serve(response);
};

export default handler;