/**
 * Class model for Service Interface
 */

import type {
    ServiceInterface,
    ServiceCapabilitiesInterface,
    ServiceLocation,
    ServiceModelInterface
} from "@/types/service";
import { Identity } from './identity';
import { Location } from './location';
import { MutationProxy } from './mutation-proxy';
import { clonePlain } from './clone-plain';

export class ServiceObject implements ServiceModelInterface {

    private _original: ServiceInterface;
    private _mutated: Partial<ServiceInterface>;
    private _mutationProxy = new MutationProxy<ServiceInterface>(() => this._original, () => this._mutated);
    _data!: ServiceInterface;
    _location: Location | null | undefined = undefined;
    _identity: Identity | null | undefined = undefined;

    constructor() {
        this._original = {
            '@type': 'mail:service',
            version: 1,
            provider: '',
            identifier: null,
            label: null,
            enabled: false,
            capabilities: {}
        };
        this._mutated = {};
        this._data = this._mutationProxy.create();
    }

    fromJson(data: ServiceInterface): ServiceObject {
        this._original = clonePlain(data);
        this._mutated = {};
        this._data = this._mutationProxy.create();
        this._location = undefined;
        this._identity = undefined;
        return this;
    }

    toJson(): ServiceInterface;
    toJson(delta: true): Partial<ServiceInterface>;
    toJson(delta?: boolean): ServiceInterface | Partial<ServiceInterface> {
        if (this._location !== undefined) {
            if (!delta) {
                // handled below to preserve full ServiceInterface typing
            }
        }

        if (delta) {
            const json: Partial<ServiceInterface> = clonePlain(this._mutated);

            if (this._location?.mutated()) {
                json.location = this._location.toJson(true) as ServiceInterface['location'];
            }

            if (this._identity?.mutated()) {
                json.identity = this._identity.toJson(true) as ServiceInterface['identity'];
            }

            return json;
        }

        const json: ServiceInterface = {
            ...clonePlain(this._original),
            ...clonePlain(this._mutated),
        };

        if (this._location !== undefined) {
            json.location = this._location ? this._location.toJson() : null;
        }

        if (this._identity !== undefined) {
            json.identity = this._identity ? this._identity.toJson() : null;
        }

        return json;
    }

    clone(): ServiceObject {
        return new ServiceObject().fromJson(this.toJson());
    }

    mutated(): boolean {
        return Reflect.ownKeys(this._mutated).length > 0 || (this._location?.mutated() ?? false) || (this._identity?.mutated() ?? false);
    }

    capable(capability: keyof ServiceCapabilitiesInterface): boolean {
        const value = this._data.capabilities?.[capability];
        return value !== undefined && value !== false;
    }

    capability(capability: keyof ServiceCapabilitiesInterface): any | null {
        if (this._data.capabilities) {
            return this._data.capabilities[capability];
        }
        return null;
    }

    /** Immutable Properties */

    get provider(): string {
        return this._data.provider;
    }

    get identifier(): string | number | null {
        return this._data.identifier;
    }

    get capabilities(): ServiceCapabilitiesInterface {
        return this._data.capabilities ?? {};
    }

    get primaryAddress(): string | null {
        return this._data.primaryAddress ?? null;
    }

    set primaryAddress(value: string | null) {
        this._data.primaryAddress = value;
    }

    get secondaryAddresses(): string[] {
        return this._data.secondaryAddresses ?? [];
    }

    set secondaryAddresses(value: string[] | null) {
        this._data.secondaryAddresses = value;
    }

    /** Mutable Properties */

    get label(): string | null {
        return this._data.label;
    }

    set label(value: string | null) {
        this._data.label = value;
    }

    get enabled(): boolean {
        return this._data.enabled;
    }

    set enabled(value: boolean) {
        this._data.enabled = value;
    }

    get location(): Location | null {
        if (this._location !== undefined) {
            return this._location;
        }

        if (this._data.location) {
            this._location = Location.fromJson(this._data.location as ServiceLocation);
            return this._location;
        }

        this._location = null;
        return null;
    }

    set location(value: Location | null) {
        this._location = value;
    }

    get identity(): Identity | null {
        if (this._identity !== undefined) {
            return this._identity;
        }

        if (this._data.identity) {
            this._identity = Identity.fromJson(this._data.identity);
            return this._identity;
        }

        this._identity = null;
        return null;
    }

    set identity(value: Identity | null) {
        this._identity = value;
    }

    get auxiliary(): Record<string, any> {
        return this._data.auxiliary ?? {};
    }

    set auxiliary(value: Record<string, any>) {
        this._data.auxiliary = value;
    }

}