import * as plugins from '../plugins.js';
import { Reception } from './classes.reception.js';
import { Organization } from './classes.organization.js';
import { User } from './classes.user.js';

export class OrganizationManager {
  public static readonly platformRoleKeys = ['owner', 'admin', 'editor', 'viewer', 'guest', 'outlaw'];

  public receptionRef: Reception;
  public get db() {
    return this.receptionRef.db.smartdataDb;
  }
  public typedrouter = new plugins.typedrequest.TypedRouter();

  public COrganization = plugins.smartdata.setDefaultManagerForDoc(this, Organization);

  constructor(receptionRefArg: Reception) {
    this.receptionRef = receptionRefArg;
    this.receptionRef.typedrouter.addTypedRouter(this.typedrouter);

    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_CreateOrganization>(
        'createOrganization',
        async (requestArg) => {
          const nameIsAvailable = async () => {
            const existingOrg = await this.COrganization.getInstance({
              data: {
                slug: requestArg.organizationSlug,
              },
            });
            const nameAvailable = !existingOrg;
            return nameAvailable;
          };
          switch (requestArg.action) {
            case 'checkAvailability':
              return {
                nameAvailable: await nameIsAvailable(),
              };
              break;
            case 'manifest':
              const nameCheckedOk = await nameIsAvailable();
              const userData = await this.receptionRef.userManager.getUserByJwtValidation(
                requestArg.jwt
              );
              const newOrg = await this.COrganization.createNewOrganizationForUser(
                this,
                userData.id,
                requestArg.organizationName,
                requestArg.organizationSlug
              );
              const role = await this.receptionRef.roleManager.modifyRoleForUserAtOrg({
                action: 'create',
                organizationId: newOrg.id,
                userId: userData.id,
                roles: ['owner'],
              });
              newOrg.data.roleIds.push(role.id);
              await newOrg.save();
              return {
                nameAvailable: true,
                resultingOrganization: await newOrg.createSavableObject(),
                role: await role.createSavableObject(),
              }
              break;
          }
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_GetOrganizationById>(
        'getOrganizationById',
        async (requestArg) => {
          const verifiedJwt = await this.receptionRef.jwtManager.verifyJWTAndGetData(
            requestArg.jwt
          );
          const user = await this.receptionRef.userManager.CUser.getInstance({
            id: verifiedJwt.data.userId,
          });
          const organization = await this.COrganization.getInstance({
            id: requestArg.id
          });
          const role = await this.receptionRef.roleManager.CRole.getInstance({
            data: {
              organizationId: organization.id,
              userId: user.id,
            }
          });

          if (!role) {
            throw new plugins.typedrequest.TypedResponseError('User not authorized for the requested organization.');
          }
          return {
            organization: await organization.createSavableObject()
          };
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_UpdateOrganization>(
        'updateOrganization',
        async (requestArg) => {
          const user = await this.receptionRef.userManager.getUserByJwtValidation(requestArg.jwt);
          const organization = await this.updateOrganizationWithAudit({
            user,
            organizationId: requestArg.organizationId,
            name: requestArg.name,
            slug: requestArg.slug,
            confirmationText: requestArg.confirmationText,
          });

          return {
            success: true,
            organization: await organization.createSavableObject(),
          };
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_DeleteOrganization>(
        'deleteOrganization',
        async (requestArg) => {
          const user = await this.receptionRef.userManager.getUserByJwtValidation(requestArg.jwt);
          await this.deleteOrganizationWithAudit({
            user,
            organizationId: requestArg.organizationId,
            confirmationText: requestArg.confirmationText,
          });

          return {
            success: true,
            deletedOrganizationId: requestArg.organizationId,
          };
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_GetOrgRoleDefinitions>(
        'getOrgRoleDefinitions',
        async (requestArg) => {
          const user = await this.receptionRef.userManager.getUserByJwtValidation(requestArg.jwt);
          const organization = await this.getOrganizationOrThrow(requestArg.organizationId);
          await this.getRoleOrThrow(user, organization);
          return {
            roleDefinitions: this.getCustomRoleDefinitions(organization),
          };
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_UpsertOrgRoleDefinition>(
        'upsertOrgRoleDefinition',
        async (requestArg) => {
          const user = await this.receptionRef.userManager.getUserByJwtValidation(requestArg.jwt);
          const roleDefinitions = await this.upsertOrgRoleDefinition({
            user,
            organizationId: requestArg.organizationId,
            roleDefinition: requestArg.roleDefinition,
          });
          return {
            success: true,
            roleDefinitions,
          };
        }
      )
    );
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<plugins.idpInterfaces.request.IReq_DeleteOrgRoleDefinition>(
        'deleteOrgRoleDefinition',
        async (requestArg) => {
          const user = await this.receptionRef.userManager.getUserByJwtValidation(requestArg.jwt);
          const roleDefinitions = await this.deleteOrgRoleDefinition({
            user,
            organizationId: requestArg.organizationId,
            roleKey: requestArg.roleKey,
            confirmationText: requestArg.confirmationText,
          });
          return {
            success: true,
            roleDefinitions,
          };
        }
      )
    );
  }

  private getCustomRoleDefinitions(organizationArg: Organization) {
    return organizationArg.data.roleDefinitions || [];
  }

  private normalizeRoleKey(roleKeyArg: string) {
    return (roleKeyArg || '').trim().toLowerCase();
  }

  public validateRoleKey(roleKeyArg: string) {
    const roleKey = this.normalizeRoleKey(roleKeyArg);
    if (!roleKey || roleKey.length < 2 || roleKey.length > 64) {
      throw new plugins.typedrequest.TypedResponseError('Role key must be between 2 and 64 characters.');
    }
    if (!/^[a-z0-9]+(?:-[a-z0-9]+)*$/.test(roleKey)) {
      throw new plugins.typedrequest.TypedResponseError('Role key may only contain lowercase letters, numbers, and single dashes.');
    }
    return roleKey;
  }

  public async getAvailableRoleKeys(organizationIdArg: string) {
    const organization = await this.getOrganizationOrThrow(organizationIdArg);
    return [
      ...OrganizationManager.platformRoleKeys,
      ...this.getCustomRoleDefinitions(organization).map((roleDefinitionArg) => roleDefinitionArg.key),
    ];
  }

  public async assertRoleKeysAreValid(organizationIdArg: string, roleKeysArg: string[]) {
    const normalizedRoleKeys = [...new Set((roleKeysArg || []).map((roleKeyArg) => this.validateRoleKey(roleKeyArg)))];
    if (!normalizedRoleKeys.length) {
      throw new plugins.typedrequest.TypedResponseError('At least one role is required.');
    }
    const availableRoleKeys = await this.getAvailableRoleKeys(organizationIdArg);
    const invalidRoleKeys = normalizedRoleKeys.filter((roleKeyArg) => !availableRoleKeys.includes(roleKeyArg));
    if (invalidRoleKeys.length) {
      throw new plugins.typedrequest.TypedResponseError(`Unknown organization roles: ${invalidRoleKeys.join(', ')}.`);
    }
    return normalizedRoleKeys;
  }

  private normalizeSlug(slugArg: string) {
    return (slugArg || '').trim().toLowerCase();
  }

  private validateSlug(slugArg: string) {
    const slug = this.normalizeSlug(slugArg);
    if (!slug || slug.length < 3 || slug.length > 64) {
      throw new plugins.typedrequest.TypedResponseError('Organization slug must be between 3 and 64 characters.');
    }
    if (!/^[a-z0-9]+(?:-[a-z0-9]+)*$/.test(slug)) {
      throw new plugins.typedrequest.TypedResponseError('Organization slug may only contain lowercase letters, numbers, and single dashes.');
    }
    return slug;
  }

  private assertConfirmation(confirmationTextArg: string, expectedTextArg: string) {
    if ((confirmationTextArg || '').trim() !== expectedTextArg) {
      throw new plugins.typedrequest.TypedResponseError(`Confirmation text must be exactly "${expectedTextArg}".`);
    }
  }

  private async getOrganizationOrThrow(organizationIdArg: string) {
    const organization = await this.COrganization.getInstance({
      id: organizationIdArg,
    });
    if (!organization) {
      throw new plugins.typedrequest.TypedResponseError('Organization not found.');
    }
    return organization;
  }

  private async getRoleOrThrow(userArg: User, organizationArg: Organization) {
    const role = await this.receptionRef.roleManager.getRoleForUserAndOrg(userArg, organizationArg);
    if (!role) {
      throw new plugins.typedrequest.TypedResponseError('User not authorized for this organization.');
    }
    return role;
  }

  private async verifyAdmin(userArg: User, organizationArg: Organization) {
    const role = await this.getRoleOrThrow(userArg, organizationArg);
    if (!role.data.roles.some((roleArg) => ['owner', 'admin'].includes(roleArg))) {
      throw new plugins.typedrequest.TypedResponseError('Organization admin privileges required.');
    }
    return role;
  }

  private async verifyOwner(userArg: User, organizationArg: Organization) {
    const role = await this.getRoleOrThrow(userArg, organizationArg);
    if (!role.data.roles.includes('owner')) {
      throw new plugins.typedrequest.TypedResponseError('Organization owner privileges required.');
    }
    return role;
  }

  private async emitOrganizationAlert(optionsArg: {
    organizationId: string;
    eventType: string;
    severity: plugins.idpInterfaces.data.TAlertSeverity;
    title: string;
    body: string;
    actorUserId: string;
    relatedEntityId?: string;
    relatedEntityType?: string;
  }) {
    await this.receptionRef.alertManager.createAlertsForEvent({
      category: 'admin',
      organizationId: optionsArg.organizationId,
      eventType: optionsArg.eventType,
      severity: optionsArg.severity,
      title: optionsArg.title,
      body: optionsArg.body,
      actorUserId: optionsArg.actorUserId,
      relatedEntityId: optionsArg.relatedEntityId,
      relatedEntityType: optionsArg.relatedEntityType,
    });
  }

  public async upsertOrgRoleDefinition(optionsArg: {
    user: User;
    organizationId: string;
    roleDefinition: {
      key: string;
      name: string;
      description?: string;
    };
  }) {
    const organization = await this.getOrganizationOrThrow(optionsArg.organizationId);
    await this.verifyAdmin(optionsArg.user, organization);
    const roleKey = this.validateRoleKey(optionsArg.roleDefinition.key);
    if (OrganizationManager.platformRoleKeys.includes(roleKey)) {
      throw new plugins.typedrequest.TypedResponseError('Platform roles cannot be redefined by an organization.');
    }

    const roleName = (optionsArg.roleDefinition.name || '').trim();
    if (!roleName) {
      throw new plugins.typedrequest.TypedResponseError('Role name is required.');
    }

    const now = Date.now();
    const roleDefinitions = this.getCustomRoleDefinitions(organization);
    const existingRoleDefinition = roleDefinitions.find((roleDefinitionArg) => roleDefinitionArg.key === roleKey);
    if (existingRoleDefinition) {
      existingRoleDefinition.name = roleName;
      existingRoleDefinition.description = optionsArg.roleDefinition.description?.trim() || '';
      existingRoleDefinition.updatedAt = now;
    } else {
      roleDefinitions.push({
        key: roleKey,
        name: roleName,
        description: optionsArg.roleDefinition.description?.trim() || '',
        createdAt: now,
        updatedAt: now,
      });
    }
    organization.data.roleDefinitions = roleDefinitions.sort((leftArg, rightArg) => leftArg.name.localeCompare(rightArg.name));
    await organization.save();

    await this.receptionRef.activityLogManager.logActivity(
      optionsArg.user.id,
      'role_changed',
      `${optionsArg.user.data.email} ${existingRoleDefinition ? 'updated' : 'created'} organization role ${roleKey}.`,
      {
        targetId: organization.id,
        targetType: 'organization-role',
      }
    );

    await this.emitOrganizationAlert({
      organizationId: organization.id,
      eventType: 'org_role_definition_updated',
      severity: 'medium',
      title: 'Organization role definition updated',
      body: `${optionsArg.user.data.email} ${existingRoleDefinition ? 'updated' : 'created'} organization role ${roleKey}.`,
      actorUserId: optionsArg.user.id,
      relatedEntityId: roleKey,
      relatedEntityType: 'organization-role',
    });

    return organization.data.roleDefinitions;
  }

  public async deleteOrgRoleDefinition(optionsArg: {
    user: User;
    organizationId: string;
    roleKey: string;
    confirmationText: string;
  }) {
    const organization = await this.getOrganizationOrThrow(optionsArg.organizationId);
    await this.verifyAdmin(optionsArg.user, organization);
    const roleKey = this.validateRoleKey(optionsArg.roleKey);
    if (OrganizationManager.platformRoleKeys.includes(roleKey)) {
      throw new plugins.typedrequest.TypedResponseError('Platform roles cannot be deleted.');
    }
    this.assertConfirmation(optionsArg.confirmationText, `delete role ${roleKey}`);

    const roleDefinitions = this.getCustomRoleDefinitions(organization);
    if (!roleDefinitions.some((roleDefinitionArg) => roleDefinitionArg.key === roleKey)) {
      throw new plugins.typedrequest.TypedResponseError('Organization role definition not found.');
    }

    organization.data.roleDefinitions = roleDefinitions.filter((roleDefinitionArg) => roleDefinitionArg.key !== roleKey);
    await organization.save();

    const roles = await this.receptionRef.roleManager.getAllRolesForOrg(organization.id);
    for (const role of roles) {
      if (role.data.roles.includes(roleKey)) {
        role.data.roles = role.data.roles.filter((roleKeyArg) => roleKeyArg !== roleKey);
        if (!role.data.roles.length) {
          role.data.roles = ['viewer'];
        }
        await role.save();
      }
    }

    const appConnections = await this.receptionRef.appConnectionManager.CAppConnection.getInstances({
      'data.organizationId': organization.id,
    });
    for (const connection of appConnections) {
      if (connection.data.roleMappings?.some((mappingArg) => mappingArg.orgRoleKey === roleKey)) {
        connection.data.roleMappings = connection.data.roleMappings.filter((mappingArg) => mappingArg.orgRoleKey !== roleKey);
        await connection.save();
      }
    }

    await this.receptionRef.activityLogManager.logActivity(
      optionsArg.user.id,
      'role_changed',
      `${optionsArg.user.data.email} deleted organization role ${roleKey}.`,
      {
        targetId: organization.id,
        targetType: 'organization-role',
      }
    );

    await this.emitOrganizationAlert({
      organizationId: organization.id,
      eventType: 'org_role_definition_deleted',
      severity: 'high',
      title: 'Organization role definition deleted',
      body: `${optionsArg.user.data.email} deleted organization role ${roleKey}. Member assignments and app mappings were cleaned up.`,
      actorUserId: optionsArg.user.id,
      relatedEntityId: roleKey,
      relatedEntityType: 'organization-role',
    });

    return organization.data.roleDefinitions;
  }

  public async updateOrganizationWithAudit(optionsArg: {
    user: User;
    organizationId: string;
    name?: string;
    slug?: string;
    confirmationText: string;
  }) {
    const organization = await this.getOrganizationOrThrow(optionsArg.organizationId);
    await this.verifyAdmin(optionsArg.user, organization);
    this.assertConfirmation(optionsArg.confirmationText, organization.data.slug);

    const previousName = organization.data.name;
    const previousSlug = organization.data.slug;
    const nextName = typeof optionsArg.name === 'string' ? optionsArg.name.trim() : previousName;
    const nextSlug = typeof optionsArg.slug === 'string' ? this.validateSlug(optionsArg.slug) : previousSlug;

    if (!nextName) {
      throw new plugins.typedrequest.TypedResponseError('Organization name is required.');
    }

    if (nextSlug !== previousSlug) {
      const existingOrganization = await this.COrganization.getInstance({
        data: {
          slug: nextSlug,
        },
      });
      if (existingOrganization && existingOrganization.id !== organization.id) {
        throw new plugins.typedrequest.TypedResponseError('Organization slug is already in use.');
      }
    }

    organization.data.name = nextName;
    organization.data.slug = nextSlug;
    await organization.save();

    const changes = [
      previousName !== nextName ? `name "${previousName}" -> "${nextName}"` : '',
      previousSlug !== nextSlug ? `slug "${previousSlug}" -> "${nextSlug}"` : '',
    ].filter(Boolean).join(', ') || 'no field changes';

    await this.receptionRef.activityLogManager.logActivity(
      optionsArg.user.id,
      'org_updated',
      `Organization ${previousName} updated: ${changes}.`,
      {
        targetId: organization.id,
        targetType: 'organization',
      }
    );

    await this.emitOrganizationAlert({
      organizationId: organization.id,
      eventType: 'org_updated',
      severity: 'high',
      title: 'Organization settings updated',
      body: `${optionsArg.user.data.email} updated ${previousName}: ${changes}.`,
      actorUserId: optionsArg.user.id,
      relatedEntityId: organization.id,
      relatedEntityType: 'organization',
    });

    return organization;
  }

  public async deleteOrganizationWithAudit(optionsArg: {
    user: User;
    organizationId: string;
    confirmationText: string;
  }) {
    const organization = await this.getOrganizationOrThrow(optionsArg.organizationId);
    await this.verifyOwner(optionsArg.user, organization);
    this.assertConfirmation(optionsArg.confirmationText, `delete ${organization.data.slug}`);

    const organizationName = organization.data.name;
    const organizationSlug = organization.data.slug;
    const roles = await this.receptionRef.roleManager.getAllRolesForOrg(organization.id);
    const appConnections = await this.receptionRef.appConnectionManager.CAppConnection.getInstances({
      'data.organizationId': organization.id,
    });
    const invitations = await this.receptionRef.userInvitationManager.CUserInvitation.getInstances({});
    const billingPlans = await this.receptionRef.billingPlanManager.CBillingPlan.getInstances({
      'data.organizationId': organization.id,
    });

    await this.receptionRef.activityLogManager.logActivity(
      optionsArg.user.id,
      'org_deleted',
      `Organization ${organizationName} (${organizationSlug}) deleted.`,
      {
        targetId: organization.id,
        targetType: 'organization',
      }
    );

    await this.emitOrganizationAlert({
      organizationId: organization.id,
      eventType: 'org_deleted',
      severity: 'critical',
      title: 'Organization deleted',
      body: `${optionsArg.user.data.email} deleted ${organizationName}. ${roles.length} memberships and ${appConnections.length} app connections were removed.`,
      actorUserId: optionsArg.user.id,
      relatedEntityId: organization.id,
      relatedEntityType: 'organization',
    });

    for (const connection of appConnections) {
      await connection.delete();
    }

    for (const invitation of invitations) {
      if (invitation.data.organizationRefs.some((refArg) => refArg.organizationId === organization.id)) {
        await invitation.removeOrganization(organization.id);
      }
    }

    for (const billingPlan of billingPlans) {
      await billingPlan.delete();
    }

    for (const role of roles) {
      const memberUser = await this.receptionRef.userManager.CUser.getInstance({
        id: role.data.userId,
      });
      if (memberUser?.data.connectedOrgs) {
        memberUser.data.connectedOrgs = memberUser.data.connectedOrgs.filter(
          (organizationIdArg) => organizationIdArg !== organization.id
        );
        await memberUser.save();
      }
      await role.delete();
    }

    await organization.delete();
  }

  public async getAllOrganizationsForUser(
    userArg: User,
  ) {
    
    const organizations: Organization[] = [];
    const userRoles = await this.receptionRef.roleManager.getAllRolesForUser(userArg);

    for (const role of userRoles) {
      const organization = await this.receptionRef.organizationmanager.COrganization.getInstance({
        id: role.data.organizationId
      });
      if (!organizations.find(orgArg => orgArg.id === organization.id)) {
        organizations.push(organization);
      }
    }

    return organizations;
  }
}