import { Injectable } from '@angular/core';

export enum UserRole {
  // Rôles Hub
  DCB_ADMIN = 'dcb-admin',
  DCB_SUPPORT = 'dcb-support',
  
  // Rôles Merchant User
  // Rôles Partenaires (Business)
  DCB_PARTNER_ADMIN = 'dcb-partner-admin',
  DCB_PARTNER_MANAGER = 'dcb-partner-manager',
  DCB_PARTNER_SUPPORT = 'dcb-partner-support',

  // Rôles Configuration Marchands (Technique)
  MERCHANT_CONFIG_ADMIN = 'ADMIN',
  MERCHANT_CONFIG_MANAGER = 'MANAGER',
  MERCHANT_CONFIG_TECHNICAL = 'TECHNICAL',
  MERCHANT_CONFIG_VIEWER = 'VIEWER',
}

type RoleCategory = 'hub' | 'partner' | 'config';

interface RoleConfig {
  label: string;
  description: string;
  badgeClass: string;
  icon: string;
}

// Configuration des rôles
const ROLE_CONFIG: Record<UserRole, RoleConfig> = {
  [UserRole.DCB_ADMIN]: {
    label: 'Administrateur DCB',
    description: 'Administrateur système avec tous les accès',
    badgeClass: 'bg-danger',
    icon: 'lucideShield'
  },
  [UserRole.DCB_SUPPORT]: {
    label: 'Support DCB',
    description: 'Support technique avec accès étendus',
    badgeClass: 'bg-info',
    icon: 'lucideHeadphones'
  },
  [UserRole.DCB_PARTNER_ADMIN]: {
    label: 'Admin Partenaire',
    description: 'Administrateur de partenaire marchand',
    badgeClass: 'bg-warning',
    icon: 'lucideShieldCheck'
  },
  [UserRole.DCB_PARTNER_MANAGER]: {
    label: 'Manager Partenaire',
    description: 'Manager opérationnel partenaire',
    badgeClass: 'bg-success',
    icon: 'lucideUserCog'
  },
  [UserRole.DCB_PARTNER_SUPPORT]: {
    label: 'Support Partenaire',
    description: 'Support technique partenaire',
    badgeClass: 'bg-secondary',
    icon: 'lucideHeadphones'
  },
  [UserRole.MERCHANT_CONFIG_ADMIN]: {
    label: 'Admin Marchand',
    description: 'Administrateur de configuration marchand',
    badgeClass: 'bg-warning',
    icon: 'lucideSettings'
  },
  [UserRole.MERCHANT_CONFIG_MANAGER]: {
    label: 'Manager Marchand',
    description: 'Manager de configuration marchand',
    badgeClass: 'bg-success',
    icon: 'lucideUserCog'
  },
  [UserRole.MERCHANT_CONFIG_TECHNICAL]: {
    label: 'Technique Marchand',
    description: 'Support technique configuration marchand',
    badgeClass: 'bg-secondary',
    icon: 'lucideWrench'
  },
  [UserRole.MERCHANT_CONFIG_VIEWER]: {
    label: 'Visualiseur Marchand',
    description: 'Visualiseur de configuration marchand',
    badgeClass: 'bg-light',
    icon: 'lucideEye'
  }
} as const;

// Rôles Hub (pour les filtres)
const HUB_ROLES = [
  UserRole.DCB_ADMIN,
  UserRole.DCB_SUPPORT,
] as const;

// Rôles Marchands (pour les filtres)
const MERCHANT_ROLES = [
  UserRole.DCB_PARTNER_ADMIN,
  UserRole.DCB_PARTNER_MANAGER,
  UserRole.DCB_PARTNER_SUPPORT,
  UserRole.MERCHANT_CONFIG_ADMIN,
  UserRole.MERCHANT_CONFIG_MANAGER,
  UserRole.MERCHANT_CONFIG_TECHNICAL,
  UserRole.MERCHANT_CONFIG_VIEWER
] as const;

@Injectable({ providedIn: 'root' })
export class RoleManagementService {
  private currentRole: UserRole | null = null;

  // Mapping des rôles équivalents
  private readonly roleEquivalents = new Map<UserRole, UserRole[]>([
    [UserRole.DCB_PARTNER_ADMIN, [UserRole.MERCHANT_CONFIG_ADMIN]],
    [UserRole.DCB_PARTNER_MANAGER, [UserRole.MERCHANT_CONFIG_MANAGER]],
    [UserRole.DCB_PARTNER_SUPPORT, [UserRole.MERCHANT_CONFIG_TECHNICAL, UserRole.MERCHANT_CONFIG_VIEWER]],
    [UserRole.MERCHANT_CONFIG_ADMIN, [UserRole.DCB_PARTNER_ADMIN]],
    [UserRole.MERCHANT_CONFIG_MANAGER, [UserRole.DCB_PARTNER_MANAGER]],
    [UserRole.MERCHANT_CONFIG_TECHNICAL, [UserRole.DCB_PARTNER_SUPPORT]],
    [UserRole.MERCHANT_CONFIG_VIEWER, [UserRole.DCB_PARTNER_SUPPORT]]
  ]);

  // Catégories des rôles
  private readonly roleCategories: Record<UserRole, RoleCategory> = {
    [UserRole.DCB_ADMIN]: 'hub',
    [UserRole.DCB_SUPPORT]: 'hub',
    [UserRole.DCB_PARTNER_ADMIN]: 'partner',
    [UserRole.DCB_PARTNER_MANAGER]: 'partner',
    [UserRole.DCB_PARTNER_SUPPORT]: 'partner',
    [UserRole.MERCHANT_CONFIG_ADMIN]: 'config',
    [UserRole.MERCHANT_CONFIG_MANAGER]: 'config',
    [UserRole.MERCHANT_CONFIG_TECHNICAL]: 'config',
    [UserRole.MERCHANT_CONFIG_VIEWER]: 'config'
  };

  // Labels des rôles
  private readonly roleLabels: Record<UserRole, string> = {
    [UserRole.DCB_ADMIN]: 'Administrateur DCB',
    [UserRole.DCB_SUPPORT]: 'Support DCB',
    [UserRole.DCB_PARTNER_ADMIN]: 'Admin Partenaire',
    [UserRole.DCB_PARTNER_MANAGER]: 'Manager Partenaire',
    [UserRole.DCB_PARTNER_SUPPORT]: 'Support Partenaire',
    [UserRole.MERCHANT_CONFIG_ADMIN]: 'Admin Configuration',
    [UserRole.MERCHANT_CONFIG_MANAGER]: 'Manager Configuration',
    [UserRole.MERCHANT_CONFIG_TECHNICAL]: 'Technique Configuration',
    [UserRole.MERCHANT_CONFIG_VIEWER]: 'Visualiseur Configuration'
  };

  // Icônes des rôles
  private readonly roleIcons: Record<UserRole, string> = {
    [UserRole.DCB_ADMIN]: 'lucideShield',
    [UserRole.DCB_SUPPORT]: 'lucideHeadphones',
    [UserRole.DCB_PARTNER_ADMIN]: 'lucideShieldCheck',
    [UserRole.DCB_PARTNER_MANAGER]: 'lucideUserCog',
    [UserRole.DCB_PARTNER_SUPPORT]: 'user-headset',
    [UserRole.MERCHANT_CONFIG_ADMIN]: 'lucideSettings',
    [UserRole.MERCHANT_CONFIG_MANAGER]: 'lucideSliders',
    [UserRole.MERCHANT_CONFIG_TECHNICAL]: 'lucideWrench',
    [UserRole.MERCHANT_CONFIG_VIEWER]: 'lucideEye'
  };

  // === GESTION DU RÔLE COURANT ===
  setCurrentRole(role: UserRole | null): void {
    this.currentRole = role;
  }

  getCurrentRole(): UserRole | null {
    return this.currentRole;
  }

  // === VÉRIFICATIONS DE RÔLES INDIVIDUELS ===

  isAdmin(): boolean {
    return this.currentRole === UserRole.DCB_ADMIN;
  }

  isSupport(): boolean {
    return this.currentRole === UserRole.DCB_SUPPORT;
  }

  isPartnerAdmin(): boolean {
    return this.currentRole === UserRole.DCB_PARTNER_ADMIN;
  }

  isPartnerManager(): boolean {
    return this.currentRole === UserRole.DCB_PARTNER_MANAGER;
  }

  isPartnerSupport(): boolean {
    return this.currentRole === UserRole.DCB_PARTNER_SUPPORT;
  }

  isConfigAdmin(): boolean {
    return this.currentRole === UserRole.MERCHANT_CONFIG_ADMIN;
  }

  isConfigManager(): boolean {
    return this.currentRole === UserRole.MERCHANT_CONFIG_MANAGER;
  }

  isConfigTechnical(): boolean {
    return this.currentRole === UserRole.MERCHANT_CONFIG_TECHNICAL;
  }

  isConfigViewer(): boolean {
    return this.currentRole === UserRole.MERCHANT_CONFIG_VIEWER;
  }

  // === VÉRIFICATIONS AVEC MAPPING ===

  isAnyAdmin(): boolean {
    return this.isAdmin() || this.isPartnerAdmin() || this.isConfigAdmin();
  }

  isAnyManager(): boolean {
    return this.isPartnerManager() || this.isConfigManager();
  }

  isAnySupport(): boolean {
    return this.isSupport() || this.isPartnerSupport() || this.isConfigTechnical() || this.isConfigViewer();
  }

  // === VÉRIFICATIONS DE CATÉGORIES ===

  isHubUser(): boolean {
    return this.isAdmin() || this.isSupport();
  }

  isPartnerUser(): boolean {
    return this.isPartnerAdmin() || this.isPartnerManager() || this.isPartnerSupport();
  }

  isConfigUser(): boolean {
    return this.isConfigAdmin() || this.isConfigManager() || this.isConfigTechnical() || this.isConfigViewer();
  }

  getRoleCategory(): RoleCategory | null {
    if (!this.currentRole) return null;
    return this.roleCategories[this.currentRole];
  }

  // === MAPPING ET ÉQUIVALENTS ===

  getEquivalentRoles(): UserRole[] {
    if (!this.currentRole) return [];
    
    const equivalents = [this.currentRole];
    const mappedRoles = this.roleEquivalents.get(this.currentRole);
    
    if (mappedRoles) {
      equivalents.push(...mappedRoles);
    }
    
    return [...new Set(equivalents)];
  }

  hasEquivalentRole(targetRole: UserRole): boolean {
    if (!this.currentRole) return false;
    
    if (this.currentRole === targetRole) return true;
    
    const equivalents = this.roleEquivalents.get(this.currentRole);
    return equivalents ? equivalents.includes(targetRole) : false;
  }

  getMappedRole(): UserRole | null {
    if (!this.currentRole) return null;
    
    const equivalents = this.roleEquivalents.get(this.currentRole);
    return equivalents && equivalents.length > 0 ? equivalents[0] : this.currentRole;
  }

  // === VÉRIFICATIONS GÉNÉRIQUES ===

  hasRole(role: UserRole): boolean {
    return this.currentRole === role;
  }

  hasAnyRole(...roles: UserRole[]): boolean {
    if (!this.currentRole) return false;
    return roles.includes(this.currentRole);
  }

  // === UTILITAIRES ===

  /**
   * Méthodes d'utilité pour les rôles
   */
  getRoleLabel(role: string): string {
    const userRole = role as UserRole;
    return ROLE_CONFIG[userRole]?.label || role;
  }

  getRoleDescription(role: string | UserRole): string {
    const userRole = role as UserRole;
    return ROLE_CONFIG[userRole]?.description || 'Description non disponible';
  }

  getRoleBadgeClass(role: string): string {
    const userRole = role as UserRole;
    return ROLE_CONFIG[userRole]?.badgeClass || 'bg-secondary';
  }

  getRoleIcon(role: string): string {
    const userRole = role as UserRole;
    return ROLE_CONFIG[userRole]?.icon || 'lucideUser';
  }

  getAllRoles(): UserRole[] {
    return Object.values(UserRole);
  }

  getHubRoles(): UserRole[] {
    return [UserRole.DCB_ADMIN, UserRole.DCB_SUPPORT];
  }

  getPartnerRoles(): UserRole[] {
    return [UserRole.DCB_PARTNER_ADMIN, UserRole.DCB_PARTNER_MANAGER, UserRole.DCB_PARTNER_SUPPORT];
  }

  getConfigRoles(): UserRole[] {
    return [
      UserRole.MERCHANT_CONFIG_ADMIN,
      UserRole.MERCHANT_CONFIG_MANAGER,
      UserRole.MERCHANT_CONFIG_TECHNICAL,
      UserRole.MERCHANT_CONFIG_VIEWER
    ];
  }
}