/**
 * Authentication Provider model for Stack.Gallery Registry
 * Stores OAuth/OIDC and LDAP provider configurations
 */

import * as plugins from '../plugins.ts';
import type {
  IAuthProvider,
  TAuthProviderType,
  TAuthProviderStatus,
  IOAuthConfig,
  ILdapConfig,
  IAttributeMapping,
  IProvisioningSettings,
} from '../interfaces/auth.interfaces.ts';
import { db } from './db.ts';

const DEFAULT_ATTRIBUTE_MAPPING: IAttributeMapping = {
  email: 'email',
  username: 'preferred_username',
  displayName: 'name',
};

const DEFAULT_PROVISIONING: IProvisioningSettings = {
  jitEnabled: true,
  autoLinkByEmail: true,
};

@plugins.smartdata.Collection(() => db)
export class AuthProvider
  extends plugins.smartdata.SmartDataDbDoc<AuthProvider, AuthProvider>
  implements IAuthProvider
{
  @plugins.smartdata.unI()
  public id: string = '';

  @plugins.smartdata.svDb()
  @plugins.smartdata.index({ unique: true })
  public name: string = ''; // URL-safe slug identifier

  @plugins.smartdata.svDb()
  @plugins.smartdata.searchable()
  public displayName: string = '';

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public type: TAuthProviderType = 'oidc';

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public status: TAuthProviderStatus = 'disabled';

  @plugins.smartdata.svDb()
  public priority: number = 100; // Lower = shown first in UI

  // Type-specific config (only one should be populated based on type)
  @plugins.smartdata.svDb()
  public oauthConfig?: IOAuthConfig;

  @plugins.smartdata.svDb()
  public ldapConfig?: ILdapConfig;

  @plugins.smartdata.svDb()
  public attributeMapping: IAttributeMapping = DEFAULT_ATTRIBUTE_MAPPING;

  @plugins.smartdata.svDb()
  public provisioning: IProvisioningSettings = DEFAULT_PROVISIONING;

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public createdAt: Date = new Date();

  @plugins.smartdata.svDb()
  public updatedAt: Date = new Date();

  @plugins.smartdata.svDb()
  public createdById: string = '';

  // Connection test tracking
  @plugins.smartdata.svDb()
  public lastTestedAt?: Date;

  @plugins.smartdata.svDb()
  public lastTestResult?: 'success' | 'failure';

  @plugins.smartdata.svDb()
  public lastTestError?: string;

  /**
   * Find provider by ID
   */
  public static async findById(id: string): Promise<AuthProvider | null> {
    return await AuthProvider.getInstance({ id });
  }

  /**
   * Find provider by name (slug)
   */
  public static async findByName(name: string): Promise<AuthProvider | null> {
    return await AuthProvider.getInstance({ name: name.toLowerCase() });
  }

  /**
   * Get all active providers (for login page)
   */
  public static async getActiveProviders(): Promise<AuthProvider[]> {
    const providers = await AuthProvider.getInstances({ status: 'active' });
    return providers.sort((a, b) => a.priority - b.priority);
  }

  /**
   * Get all providers (for admin)
   */
  public static async getAllProviders(): Promise<AuthProvider[]> {
    const providers = await AuthProvider.getInstances({});
    return providers.sort((a, b) => a.priority - b.priority);
  }

  /**
   * Create a new OAuth/OIDC provider
   */
  public static async createOAuthProvider(data: {
    name: string;
    displayName: string;
    oauthConfig: IOAuthConfig;
    attributeMapping?: IAttributeMapping;
    provisioning?: IProvisioningSettings;
    createdById: string;
  }): Promise<AuthProvider> {
    const provider = new AuthProvider();
    provider.id = await AuthProvider.getNewId();
    provider.name = data.name.toLowerCase().replace(/[^a-z0-9-]/g, '-');
    provider.displayName = data.displayName;
    provider.type = 'oidc';
    provider.status = 'disabled';
    provider.oauthConfig = data.oauthConfig;
    provider.attributeMapping = data.attributeMapping || DEFAULT_ATTRIBUTE_MAPPING;
    provider.provisioning = data.provisioning || DEFAULT_PROVISIONING;
    provider.createdById = data.createdById;
    provider.createdAt = new Date();
    provider.updatedAt = new Date();
    await provider.save();
    return provider;
  }

  /**
   * Create a new LDAP provider
   */
  public static async createLdapProvider(data: {
    name: string;
    displayName: string;
    ldapConfig: ILdapConfig;
    attributeMapping?: IAttributeMapping;
    provisioning?: IProvisioningSettings;
    createdById: string;
  }): Promise<AuthProvider> {
    const provider = new AuthProvider();
    provider.id = await AuthProvider.getNewId();
    provider.name = data.name.toLowerCase().replace(/[^a-z0-9-]/g, '-');
    provider.displayName = data.displayName;
    provider.type = 'ldap';
    provider.status = 'disabled';
    provider.ldapConfig = data.ldapConfig;
    provider.attributeMapping = data.attributeMapping || {
      email: 'mail',
      username: 'uid',
      displayName: 'displayName',
    };
    provider.provisioning = data.provisioning || DEFAULT_PROVISIONING;
    provider.createdById = data.createdById;
    provider.createdAt = new Date();
    provider.updatedAt = new Date();
    await provider.save();
    return provider;
  }

  /**
   * Update connection test result
   */
  public async updateTestResult(success: boolean, error?: string): Promise<void> {
    this.lastTestedAt = new Date();
    this.lastTestResult = success ? 'success' : 'failure';
    this.lastTestError = error;
    await this.save();
  }

  /**
   * Lifecycle hook: Update timestamps before save
   */
  public async beforeSave(): Promise<void> {
    this.updatedAt = new Date();
    if (!this.id) {
      this.id = await AuthProvider.getNewId();
    }
  }

  /**
   * Get public info (for login page - no secrets)
   */
  public toPublicInfo(): {
    id: string;
    name: string;
    displayName: string;
    type: TAuthProviderType;
  } {
    return {
      id: this.id,
      name: this.name,
      displayName: this.displayName,
      type: this.type,
    };
  }

  /**
   * Get admin info (secrets masked)
   */
  public toAdminInfo(): Record<string, unknown> {
    const info: Record<string, unknown> = {
      id: this.id,
      name: this.name,
      displayName: this.displayName,
      type: this.type,
      status: this.status,
      priority: this.priority,
      attributeMapping: this.attributeMapping,
      provisioning: this.provisioning,
      createdAt: this.createdAt,
      updatedAt: this.updatedAt,
      createdById: this.createdById,
      lastTestedAt: this.lastTestedAt,
      lastTestResult: this.lastTestResult,
      lastTestError: this.lastTestError,
    };

    // Mask secrets in config
    if (this.oauthConfig) {
      info.oauthConfig = {
        ...this.oauthConfig,
        clientSecretEncrypted: this.oauthConfig.clientSecretEncrypted ? '********' : undefined,
      };
    }

    if (this.ldapConfig) {
      info.ldapConfig = {
        ...this.ldapConfig,
        bindPasswordEncrypted: this.ldapConfig.bindPasswordEncrypted ? '********' : undefined,
      };
    }

    return info;
  }
}