import { Injectable, Logger, OnApplicationBootstrap } from "@nestjs/common";
import { RbacRepository } from "./repositories/rbac.repository";

@Injectable()
export class RbacService implements OnApplicationBootstrap {
	private readonly logger = new Logger(RbacService.name);

	constructor(private readonly rbacRepository: RbacRepository) {}

	async onApplicationBootstrap() {
		this.logger.log("RbacService initialized, checking roles...");
		await this.seedRoles();
	}

	async seedRoles() {
		try {
			const count = await this.rbacRepository.countRoles();
			if (count === 0) {
				this.logger.log("No roles found, seeding default roles...");
				const defaultRoles = [
					{
						name: "Administrator",
						slug: "admin",
						description: "Full system access",
					},
					{
						name: "Moderator",
						slug: "moderator",
						description: "Access to moderation tools",
					},
					{ name: "User", slug: "user", description: "Standard user access" },
				];

				for (const role of defaultRoles) {
					await this.rbacRepository.createRole(
						role.name,
						role.slug,
						role.description,
					);
					this.logger.log(`Created role: ${role.slug}`);
				}
				this.logger.log("Default roles seeded successfully.");
			} else {
				this.logger.log(`${count} roles already exist, skipping seeding.`);
			}
		} catch (error) {
			this.logger.error("Error during roles seeding:", error);
		}
	}

	async getUserRoles(userId: string) {
		return this.rbacRepository.findRolesByUserId(userId);
	}

	async getUserPermissions(userId: string) {
		return this.rbacRepository.findPermissionsByUserId(userId);
	}

	async countAdmins() {
		return this.rbacRepository.countAdmins();
	}

	async assignRoleToUser(userId: string, roleSlug: string) {
		return this.rbacRepository.assignRole(userId, roleSlug);
	}
}