import RoleUtils from '~/services/rights/roleUtils'
import {AbilitiesType} from '~/types/interfaces'
import YamlDenormalizer from "~/services/data/serializer/denormalizer/yamlDenormalizer";
import {MongoAbility} from "@casl/ability/dist/types/Ability";
import {AnyJson} from "~/types/data";
import {useEach} from "#imports";
import {ABILITIES} from "~/types/enum/enums";

/**
 * Classe permettant de mener des opérations sur les habilités
 */
class AbilityUtils {
    private readonly ability: MongoAbility = {} as MongoAbility
    private readonly accessProfile: any
    private readonly organizationProfile: any

    /**
     * @constructor
     */
    constructor(
        ability: MongoAbility,
        accessProfile: any,
        organizationProfile: any,
    ) {
        this.ability = ability
        this.accessProfile = accessProfile
        this.organizationProfile = organizationProfile
    }

    /**
     * Définit les abilities de l'utilisateur selon son profil
     */
    setupAbilities() {
        // Nécessaire pour que l'update des habilités soit correcte après la phase SSR
        this.ability.update(this.accessProfile.abilities)

        // const abilities: Array<AbilitiesType> = this.buildAbilities();
        // this.accessProfile.abilities = abilities
        // this.ability.update(abilities)

        // Au moment où l'on effectue une action organizationProfileStore.setProfile, il faut aller récupérer
        // les différentes habilités que l'utilisateur peut effectuer. (Tout cela se passe en SSR)
        const unsubscribe = this.organizationProfile.$onAction(({
                                                                    name, // name of the action
                                                                    store, // store instance, same as `someStore`
                                                                    args, // array of parameters passed to the action
                                                                    after, // hook after the action returns or resolves
                                                                    onError, // hook if the action throws or rejects
                                                                }: any) => {
            after((result: any)=>{
                if (name === 'setProfile'){
                    //On récupère les habilités
                    const abilities: Array<AbilitiesType> = this.buildAbilities();

                    //On les store puis on update le service ability pour le mettre à jour.
                    this.accessProfile.abilities = abilities
                    this.ability.update(abilities)

                    // Unsubscribe pour éviter les memory leaks
                    unsubscribe()
                }
            })
        })
    }

    /**
     * Récupération de l'ensemble des habilités de l'utilisateur, qu'elles soient par Roles ou par Config
     *
     * @return {Array<AbilitiesType>}
     */
    buildAbilities(): Array<AbilitiesType> {
        const abilitiesByRoles: Array<AbilitiesType> = this.buildAbilitiesFromRoles(this.accessProfile.roles)
        const abilitiesByConfig = this.buildAbilitiesFromConfig('./config/abilities/config.yaml')
        return abilitiesByRoles.concat(abilitiesByConfig)
    }

    /**
     * Adaptation et transformations des roles symfony en abilities Casl
     *
     * @param {Array<string>} roles
     * @return {Array<AbilitiesType>}
     */
    buildAbilitiesFromRoles(roles: Array<string>): Array<AbilitiesType> {
        return RoleUtils.rolesToAbilities(roles)
    }

    /**
     * Charge les habilités depuis les fichiers de configuration
     *
     * @param {string} configPath
     * @return {Array<AbilitiesType>}
     */
    buildAbilitiesFromConfig(configPath: string): Array<AbilitiesType> {
        const doc = YamlDenormalizer.denormalize({path: configPath})
        const fromConfig = doc.abilities

        const abilities: Array<AbilitiesType> = []

        useEach(fromConfig, (ability: { action: ABILITIES, services: object }, subject: string) => {
            const { action, services } = ability
            if (this.hasConfigAbility(services)) {
                abilities.push({ action, subject })
            }
        })

        return abilities
    }

    /**
     * Parcourt les services définis dans la configuration, et établit si oui ou non l'habilité est autorisée
     *
     * @return {boolean}
     * @param services
     */
    hasConfigAbility(services: AnyJson) {
        const handlerMap: any = {
            hasRole: (parameters: any) => this.hasRoles(parameters),
            hasAbility: (parameters: any) => this.hasAbilities(parameters),
            hasProfile: (parameters: any) => this.hasProfileAmong(parameters),
            isAdminAccount: (parameters: any) => this.accessProfile.isAdminAccount,
            hasModule: (parameters: any) => this.hasModule(parameters),
            isSchool: (parameters: any) => this.organizationProfile.isSchool,
            isArtist: (parameters: any) => this.organizationProfile.isArtist,
            isManagerProduct: (parameters: any) => this.organizationProfile.isManagerProduct,
            isOrganizationWithChildren: (parameters: any) => this.organizationProfile.hasChildren,
            isAssociation: (parameters: any) => this.organizationProfile.isAssociation,
            isShowAdherentList: (parameters: any) => this.organizationProfile.isShowAdherentList,
            isCmf: (parameters: any) => this.organizationProfile.isCmf,
            getWebsite: (parameters: any) => this.organizationProfile.getWebsite,
        }

        let hasAbility = true

        useEach(services, (handlers: Array<{ function: string, parameters?: Array<any>, result?: any }>, service: string) => {

            useEach(handlers, (handler: { function: string, parameters?: Array<any>, result?: any }) => {

                const expectedResult: boolean = handler.result ?? true;
                const parametersArray = handler.parameters ?? []

                useEach(parametersArray, (parameters: any) => {
                    const actualResult = handlerMap[handler.function](parameters ?? null)

                    if (actualResult !== expectedResult) {
                        hasAbility = false
                        return false
                    }
                })
                if (!hasAbility) { return false }
            })
            if (!hasAbility) { return false }
        })
        return hasAbility
    }

    /**
     * Est-ce que l'utilisateur possède la ou les habilités
     *
     * @param {Array<AbilitiesType>} abilities Habilités à tester
     * @return {boolean}
     */
    hasAbilities(abilities: Array<AbilitiesType>|null): boolean{
        useEach(abilities ?? [], (ability) => {
            if (!this.ability.can(ability.action, ability.subject)) {
                return false
            }
        })
        return true
    }


    /**
     * Teste le profil d'un utilisateur
     *
     * @param {string} profile : profile à tester
     * @return {boolean}
     */
    private testProfile(profile: string): boolean {
        const factory: {[key: string]: boolean|null} = {
            'admin': this.accessProfile.isAdmin,
            'administratifManager': this.accessProfile.isAdministratifManager,
            'pedagogicManager': this.accessProfile.isPedagogicManager,
            'financialManager': this.accessProfile.isFinancialManager,
            'caMember': this.accessProfile.isCaMember,
            'student': this.accessProfile.isStudent,
            'teacher': this.accessProfile.isTeacher,
            'member': this.accessProfile.isMember,
            'other': this.accessProfile.isOther,
            'guardian': this.accessProfile.isGuardian,
            'payor': this.accessProfile.isPayer,
        }
        return factory[profile] ?? false
    }

    /**
     * Retourne vrai si l'utilisateur connecté possède l'un des profils passés en paramètre
     *
     * @param {Array<string>} profiles Profils à tester
     * @return {boolean}
     */
    hasProfileAmong (profiles: Array<string>|null): boolean {
        if (null === profiles)
            return true;

        useEach(profiles, (profile) => {
            if (this.testProfile(profile)) {
                return true
            }
        })
        return false
    }

    /**
     * Est-ce que l'utilisateur possède le rôle donné ?
     *
     * @return {boolean}
     * @param role
     */
    hasRole(role: string|null): boolean {
        return role === null || this.accessProfile.roles.includes(role)
    }

    /**
     * Est-ce que l'utilisateur possède tous les rôles donnés ?
     *
     * @return {boolean}
     * @param roles
     */
    hasRoles(roles: Array<string>): boolean {
        useEach(roles, (r: string) =>  {
            if (!this.accessProfile.roles.includes(r)) {
                return false
            }
        })
        return true
    }

    /**
     * Est-ce que l'organisation possède le module donné
     *
     * @return {boolean}
     * @param module
     */
    hasModule(module: string): boolean {
        return this.organizationProfile.modules.includes(module)
    }
}

export default AbilityUtils