import { AeroflyConfigurationNode, AeroflyConfigurationNodeComment } from "../node/AeroflyConfigurationNode.js";
import { AeroflyLocalizedText } from "./AeroflyLocalizedText.js";
import { AeroflyMissionCheckpoint } from "./AeroflyMissionCheckpoint.js";
import { AeroflyMissionConditions } from "./AeroflyMissionConditions.js";
import { AeroflyMissionTargetPlane } from "./AeroflyMissionTargetPlane.js";

export const feetPerMeter = 3.28084;
export const meterPerStatuteMile = 1609.344;

/**
 * Data for the aircraft to use on this mission
 * @property {string} name lowercase Aerofly aircraft ID
 * @property {string} icao ICAO aircraft code
 * @property {string} livery (not used yet)
 */
export type AeroflyMissionAircraft = {
    name: string;
    icao: string;
    livery: string;
};

/**
 * State of aircraft systems. Configures power settings, flap positions etc
 */
export type AeroflyMissionSetting =
    | "cold_and_dark"
    | "before_start"
    | "taxi"
    | "takeoff"
    | "cruise"
    | "approach"
    | "landing"
    | "winch_launch"
    | "aerotow"
    | "pushback";

/**
 * Represents origin or destination conditions for flight
 * @property {string} icao uppercase ICAO airport ID
 * @property {number} longitude easting, using the World Geodetic
 *    System 1984 (WGS 84) [WGS84] datum, with longitude and latitude units
 *    of decimal degrees; [-180,180]
 * @property {number} latitude northing, using the World Geodetic
 *    System 1984 (WGS 84) [WGS84] datum, with longitude and latitude units
 *    of decimal degrees; -90..90
 * @property {number} dir in degree
 * @property {number} alt the height in meters above or below the WGS
 *    84 reference ellipsoid
 */
export type AeroflyMissionPosition = {
    icao: string;
    longitude: number;
    latitude: number;
    dir: number;
    alt: number;
};

/**
 * @class
 * A single flighplan, containing aircraft and weather data as well.
 *
 * The purpose of this class is to collect data needed for Aerofly FS4's
 * `custom_missions_user.tmc` flight plan file format, and export the structure
 * for this file via the `toString()` method.
 */
export class AeroflyMission {
    /**
     * @property {?string} tutorialName will create a link to a tutorial page at https://www.aerofly.com/aircraft-tutorials/
     */
    tutorialName: string | null;

    /**
     * @property {string} title of this flight plan
     */
    title: string;

    /**
     * @property {string} description text, mission briefing, etc
     */
    description: string;

    /**
     * @property {AeroflyLocalizedText[]} localizedTexts for title and description
     */
    localizedTexts: AeroflyLocalizedText[];

    /**
     * @property {string[]} tags free-text tags
     */
    tags: string[];

    /**
     * @property {?boolean} isFeatured makes this mission pop up in "Challenges"
     */
    isFeatured: boolean | null;

    /**
     * @property {?number} difficulty values between 0.00 and 2.00 have been encountered, but they seem to be without limit
     */
    difficulty: number | null;

    /**
     * @property {"cold_and_dark"|"before_start"|"taxi"|"takeoff"|"cruise"|"approach"|"landing"|"winch_launch"|"aerotow"|"pushback"} flightSetting of aircraft, like "taxi", "cruise"
     */
    flightSetting: AeroflyMissionSetting;

    /**
     * @property {object} aircraft for this mission
     */
    aircraft: AeroflyMissionAircraft;

    /**
     * @property {?number} fuelMass in kg
     */
    fuelMass: number | null;

    /**
     * @property {?number} payloadMass in kg
     */
    payloadMass: number | null;

    /**
     * @property {string} callsign of aircraft, uppercased
     */
    callsign: string;

    /**
     * @property {object} origin position of aircraft, as well as name of starting airport. Position does not have match airport.
     */
    origin: AeroflyMissionPosition;

    /**
     * @property {object} destination position of aircraft, as well as name of destination airport. Position does not have match airport.
     */
    destination: AeroflyMissionPosition;

    /**
     * @property {?number} distance in meters
     */
    distance: number | null;

    /**
     * @property {?number} duration in seconds
     */
    duration: number | null;

    /**
     * @property {?boolean} isScheduled marks this flight as "Scheduled flight".
     */
    isScheduled: boolean | null;

    /**
     * @property {?AeroflyMissionTargetPlane} finish as finish condition
     */
    finish: AeroflyMissionTargetPlane | null;

    /**
     * @property {AeroflyMissionConditions} conditions like time and weather for mission
     */
    conditions: AeroflyMissionConditions;

    /**
     * @property {AeroflyMissionConditions} checkpoints form the actual flight plan
     */
    checkpoints: AeroflyMissionCheckpoint[];

    /**
     * @param {string} title of this flight plan
     * @param {object} [additionalAttributes] allows to set additional attributes on creation
     * @param {string} [additionalAttributes.description] text, mission briefing, etc
     * @param {AeroflyLocalizedText[]} [additionalAttributes.localizedTexts] translations for title and description
     * @param {?string} [additionalAttributes.tutorialName] will create a link to a tutorial page at https://www.aerofly.com/aircraft-tutorials/
     * @param {string[]} [additionalAttributes.tags] free-text tags
     * @param {?boolean} [additionalAttributes.isFeatured] makes this mission pop up in "Challenges"
     * @param {?number} [additionalAttributes.difficulty] values between 0.00 and 2.00 have been encountered, but they seem to be without limit
     * @param {"cold_and_dark"|"before_start"|"taxi"|"takeoff"|"cruise"|"approach"|"landing"|"winch_launch"|"aerotow"|"pushback"} [additionalAttributes.flightSetting] of aircraft, like "taxi", "cruise"
     * @param {{name:string,livery:string,icao:string}} [additionalAttributes.aircraft] for this mission
     * @param {string} [additionalAttributes.callsign] of aircraft, uppercased
     * @param {?number} [additionalAttributes.fuelMass] in kg
     * @param {?number} [additionalAttributes.payloadMass] in kg
     * @param {object} [additionalAttributes.origin] position of aircraft, as well as name of starting airport. Position does not have match airport.
     * @param {object} [additionalAttributes.destination] position of aircraft, as well as name of destination airport. Position does not have match airport.
     * @param {?number} [additionalAttributes.distance] in meters
     * @param {?number} [additionalAttributes.duration] in seconds
     * @param {?boolean} [additionalAttributes.isScheduled] marks this flight as "Scheduled flight".
     * @param {?AeroflyMissionTargetPlane} [additionalAttributes.finish] as finish condition
     * @param {AeroflyMissionConditions} [additionalAttributes.conditions] like time and weather for mission
     * @param {AeroflyMissionCheckpoint[]} [additionalAttributes.checkpoints] form the actual flight plan
     */
    constructor(
        title: string,
        {
            tutorialName = null,
            description = "",
            localizedTexts = [],
            tags = [],
            isFeatured = null,
            difficulty = null,
            flightSetting = "taxi",
            aircraft = {
                name: "c172",
                icao: "",
                livery: "",
            },
            callsign = "",
            fuelMass = null,
            payloadMass = null,
            origin = {
                icao: "",
                longitude: 0,
                latitude: 0,
                dir: 0,
                alt: 0,
            },
            destination = {
                icao: "",
                longitude: 0,
                latitude: 0,
                dir: 0,
                alt: 0,
            },
            distance = null,
            duration = null,
            isScheduled = null,
            finish = null,
            conditions = new AeroflyMissionConditions(),
            checkpoints = [],
        }: Partial<AeroflyMission> = {},
    ) {
        this.tutorialName = tutorialName;
        this.title = title;
        this.checkpoints = checkpoints;
        this.description = description;
        this.localizedTexts = localizedTexts;
        this.tags = tags;
        this.isFeatured = isFeatured;
        this.difficulty = difficulty;
        this.flightSetting = flightSetting;
        this.aircraft = aircraft;
        this.callsign = callsign;
        this.fuelMass = fuelMass;
        this.payloadMass = payloadMass;
        this.origin = origin;
        this.destination = destination;
        this.distance = distance;
        this.duration = duration;
        this.isScheduled = isScheduled;
        this.finish = finish;
        this.conditions = conditions;
    }

    /**
     * @returns {AeroflyConfigurationNode[]} indexed checkpoints
     */
    getCheckpointElements(): AeroflyConfigurationNode[] {
        return this.checkpoints.map((c: AeroflyMissionCheckpoint, index: number): AeroflyConfigurationNode => {
            return c.getElement(index);
        });
    }

    /**
     * @returns {AeroflyConfigurationNode[]} indexed checkpoints
     */
    getLocalizedTextElements(): AeroflyConfigurationNode[] {
        return this.localizedTexts.map((c: AeroflyLocalizedText, index: number): AeroflyConfigurationNode => {
            const el = c.getElement();
            el.value = String(index);
            return el;
        });
    }

    /**
     * @returns {AeroflyConfigurationNode} for this mission
     */
    getElement(): AeroflyConfigurationNode {
        if (!this.origin.icao) {
            const firstCheckpoint = this.checkpoints[0];
            this.origin = {
                icao: firstCheckpoint.name,
                longitude: firstCheckpoint.longitude,
                latitude: firstCheckpoint.latitude,
                dir: this.origin.dir,
                alt: firstCheckpoint.altitude,
            };
        }

        if (!this.destination.icao) {
            const lastCheckpoint = this.checkpoints[this.checkpoints.length - 1];
            this.destination = {
                icao: lastCheckpoint.name,
                longitude: lastCheckpoint.longitude,
                latitude: lastCheckpoint.latitude,
                dir: lastCheckpoint.direction ?? 0,
                alt: lastCheckpoint.altitude,
            };
        }

        const element = new AeroflyConfigurationNode("tmmission_definition", "mission");

        element.appendChild("string8", "title", this.title);
        element.appendChild("string8", "description", this.description);

        if (this.tutorialName !== null) {
            element.appendChild(
                "string8",
                "tutorial_name",
                this.tutorialName,
                `Opens https://www.aerofly.com/aircraft-tutorials/${this.tutorialName}`,
            );
        }
        if (this.localizedTexts.length > 0) {
            element.append(
                new AeroflyConfigurationNode("list_tmmission_definition_localized", "localized_text").append(
                    ...this.getLocalizedTextElements(),
                ),
            );
        }
        if (this.tags.length > 0) {
            element.appendChild("string8u", "tags", this.tags);
        }
        if (this.difficulty !== null) {
            element.appendChild("float64", "difficulty", this.difficulty);
        }
        if (this.isFeatured !== null) {
            element.appendChild("bool", "is_featured", this.isFeatured);
        }

        element.appendChild("string8", "flight_setting", this.flightSetting);
        element.appendChild("string8u", "aircraft_name", this.aircraft.name);
        element.appendChild("stringt8c", "aircraft_icao", this.aircraft.icao);
        if (this.aircraft.livery) {
            element.append(new AeroflyConfigurationNodeComment("string8", "aircraft_livery", this.aircraft.livery));
        }
        element.appendChild("stringt8c", "callsign", this.callsign);

        if (this.fuelMass !== null) {
            element.append(new AeroflyConfigurationNodeComment("float64", "fuel_mass", this.fuelMass, `kg`));
        }
        if (this.payloadMass !== null) {
            element.append(new AeroflyConfigurationNodeComment("float64", "payload_mass", this.payloadMass, `kg`));
        }

        element.appendChild("stringt8c", "origin_icao", this.origin.icao);
        element.appendChild("tmvector2d", "origin_lon_lat", [this.origin.longitude, this.origin.latitude]);
        element.appendChild(
            "float64",
            "origin_alt",
            this.origin.alt,
            `${Math.ceil(this.origin.alt * feetPerMeter)} ft MSL`,
        );
        element.appendChild("float64", "origin_dir", this.origin.dir);
        element.appendChild("stringt8c", "destination_icao", this.destination.icao);
        element.appendChild("tmvector2d", "destination_lon_lat", [
            this.destination.longitude,
            this.destination.latitude,
        ]);
        element.appendChild(
            "float64",
            "destination_alt",
            this.destination.alt,
            `${Math.ceil(this.destination.alt * feetPerMeter)} ft MSL`,
        );
        element.appendChild("float64", "destination_dir", this.destination.dir);

        if (this.distance !== null) {
            element.appendChild("float64", "distance", this.distance, `${Math.round(this.distance / 1000)} km`);
        }
        if (this.duration !== null) {
            element.appendChild("float64", "duration", this.duration, `${Math.round(this.duration / 60)} min`);
        }
        if (this.isScheduled !== null) {
            element.appendChild("bool", "is_scheduled", this.isScheduled);
        }
        if (this.finish !== null) {
            element.append(this.finish.getElement());
        }

        element.append(this.conditions.getElement());
        if (this.checkpoints.length > 0) {
            element.append(
                new AeroflyConfigurationNode("list_tmmission_checkpoint", "checkpoints").append(
                    ...this.getCheckpointElements(),
                ),
            );
        }

        return element;
    }

    /**
     * @returns {string} to use in Aerofly FS4's `custom_missions_user.tmc`
     */
    toString(): string {
        return this.getElement().toString();
    }

    static fromJSON(json: unknown): AeroflyMission {
        if (typeof json !== "object" || json === null) {
            throw new Error("Invalid mission data");
        }
        const data = json as Record<string, unknown>;
        return new AeroflyMission(String(data.title ?? ""), {
            tutorialName: String(data.tutorialName ?? ""),
            description: String(data.description ?? ""),
            localizedTexts: [], // TODO: (Array.isArray(data.localizedTexts) ? data.localizedTexts : []).map((l) => AeroflyMissionCheckpoint.fromJSON(l))
            tags: (Array.isArray(data.tags) ? data.tags : []).map((t) => String(t)),
            isFeatured: data.isFeatured !== undefined ? Boolean(data.isFeatured) : null,
            difficulty: data.difficulty !== undefined ? Number(data.difficulty) : null,
            flightSetting: String(data.flightSetting ?? "taxi") as AeroflyMissionSetting,
            aircraft: {
                name: "c172",
                icao: "",
                livery: "",
            },
            callsign: String(data.callsign ?? ""),
            fuelMass: data.fuelMass !== undefined ? Number(data.fuelMass) : null,
            payloadMass: data.payloadMass !== undefined ? Number(data.payloadMass) : null,
            origin: {
                icao: "",
                longitude: 0,
                latitude: 0,
                dir: 0,
                alt: 0,
            },
            destination: {
                icao: "",
                longitude: 0,
                latitude: 0,
                dir: 0,
                alt: 0,
            },
            distance: data.distance !== undefined ? Number(data.distance) : null,
            duration: data.duration !== undefined ? Number(data.duration) : null,
            isScheduled: data.isScheduled !== undefined ? Boolean(data.isScheduled) : null,
            finish: null, // TODO
            conditions: AeroflyMissionConditions.fromJSON(data.conditions),
            checkpoints: [], // TODO: (Array.isArray(data.checkpoints) ? data.checkpoints : []).map((c) => AeroflyMissionCheckpoint.fromJSON(c))
        });
    }
}