import { Inject, Injectable, Logger } from '@nestjs/common';
import {
  Pothos,
  PothosRef,
  PothosSchema,
  SchemaBuilderToken,
} from '@smatch-corp/nestjs-pothos';
import { Builder } from '../Graphql/graphql.builder';
import { PrismaService } from '../Prisma/prisma.service';
import { MinioService } from '../Minio/minio.service';
import { CenterStatus, Role } from '@prisma/client';
import { MailService } from '../Mail/mail.service';
@Injectable()
export class CenterSchema extends PothosSchema {
  constructor(
    @Inject(SchemaBuilderToken) private readonly builder: Builder,
    private readonly prisma: PrismaService,
    private readonly minioService: MinioService,
    private readonly mailService: MailService,
  ) {
    super();
  }

  @PothosRef()
  center() {
    return this.builder.prismaObject('Center', {
      description: 'A center in the system.',
      fields: (t) => ({
        id: t.exposeID('id', {
          description: 'The unique identifier of the center.',
        }),
        centerOwnerId: t.exposeID('centerOwnerId', {
          description: 'The ID of the center owner.',
        }),
        bank: t.exposeString('bank', {
          description: 'The bank of the center.',
        }),
        bankAccountNumber: t.exposeString('bankAccountNumber', {
          description: 'The bank account number of the center.',
        }),
        name: t.exposeString('name', {
          description: 'The name of the center.',
        }),
        description: t.exposeString('description', {
          description: 'The description of the center.',
        }),
        adminNote: t.relation('adminNote', {
          description: 'The admin note of the center.',
        }),
        logoUrl: t.exposeString('logoUrl', {
          description: 'The URL of the center logo.',
        }),
        logoFile: t.relation('logoFile', {
          description: 'The file associated with the center logo.',
        }),
        location: t.exposeString('location', {
          description: 'The location of the center.',
        }),
        individual: t.exposeBoolean('individual', {
          nullable: true,
          description: 'Whether the center is an individual center.',
        }),
        createdAt: t.expose('createdAt', { type: 'DateTime' }),
        updatedAt: t.expose('updatedAt', { type: 'DateTime' }),
        services: t.relation('services', {
          description: 'The services provided by the center.',
        }),
        centerOwner: t.relation('centerOwner', {
          description: 'The owner of the center.',
        }),
        chatRoom: t.relation('chatRoom', {
          description: 'The chat room associated with the center.',
        }),
        centerMentor: t.relation('centerMentors', {
          description: 'The mentors of the center.',
        }),
        resume: t.relation('resume', {
          description: 'The resume of the center.',
        }),
        centerStatus: t.expose('centerStatus', {
          type: CenterStatus,
          description: 'The status of the center.',
        }),
        uploadedFileId: t.exposeID('uploadedFileId', {
          description: 'The ID of the uploaded file.',
        }),
      }),
    });
  }

  @Pothos()
  init(): void {
    this.builder.queryFields((t) => ({
      centers: t.prismaField({
        description:
          'Retrieve a list of centers with optional filtering, ordering, and pagination.',
        type: [this.center()],
        args: this.builder.generator.findManyArgs('Center'),
        resolve: async (query, root, args) => {
          return await this.prisma.center.findMany({
            ...query,
            skip: args.skip ?? undefined,
            take: args.take ?? undefined,
            orderBy: args.orderBy ?? undefined,
            where: args.filter ?? undefined,
          });
        },
      }),
      center: t.prismaField({
        type: this.center(),
        description: 'Retrieve a single center by its unique identifier.',
        args: this.builder.generator.findUniqueArgs('Center'),
        resolve: async (query, root, args) => {
          return await this.prisma.center.findUnique({
            ...query,
            where: args.where,
          });
        },
      }),
      // get current center of centermentor by providing userId
      centerByCenterMentor: t.prismaField({
        type: this.center(),
        description: 'Retrieve a single center by its unique identifier.',
        args: {
          userId: t.arg({ type: 'String', required: true }),
        },
        resolve: async (query, root, args) => {
          return await this.prisma.center.findFirst({
            where: {
              centerMentors: {
                some: {
                  mentorId: args.userId,
                },
              },
            },
          });
        },
      }),
    }));

    // mutation section
    this.builder.mutationFields((t) => ({
      createCenter: t.prismaField({
        description: 'Create a new center.',
        type: this.center(),
        args: {
          input: t.arg({
            type: this.builder.generator.getCreateInput('Center'),
            required: true,
          }),
        },
        resolve: async (query, root, args) => {
          return await this.prisma.center.create({
            ...query,
            data: args.input,
          });
        },
      }),
      updateCenter: t.prismaField({
        type: this.center(),
        description: 'Update an existing center.',
        args: {
          input: t.arg({
            type: this.builder.generator.getUpdateInput('Center'),
            required: true,
          }),
          where: t.arg({
            type: this.builder.generator.getWhereUnique('Center'),
            required: true,
          }),
        },
        resolve: async (query, root, args) => {
          return await this.prisma.center.update({
            ...query,
            where: args.where,
            data: args.input,
          });
        },
      }),
      deleteCenter: t.prismaField({
        type: this.center(),
        description: 'Delete an existing center.',
        args: {
          where: t.arg({
            type: this.builder.generator.getWhereUnique('Center'),
            required: true,
          }),
        },
        resolve: async (query, root, args) => {
          return await this.prisma.center.delete({
            ...query,
            where: args.where,
          });
        },
      }),
      approveOrRejectCenter: t.prismaField({
        type: this.center(),
        description: 'Approve a center and promote centermentor to mentor',
        args: {
          centerId: t.arg({
            type: 'String',
            required: true,
          }),
          approve: t.arg({
            type: 'Boolean',
            required: true,
          }),
          adminNote: t.arg({
            type: 'String',
            required: false,
          }),
        },
        resolve: async (query, root, args) => {
          return await this.prisma.$transaction(async (prisma) => {
            const center = await prisma.center.findUnique({
              ...query,
              where: {
                id: args.centerId,
              },
            });
            if (!center) {
              throw new Error('Center not found');
            }
            // check if center is already approved or rejected
            if (center.centerStatus !== CenterStatus.PENDING) {
              throw new Error('Center is already approved or rejected');
            }
            // find user and promote to center owner
            const centerOwnerId = center.centerOwnerId;
            if (!centerOwnerId) {
              throw new Error('User not found');
            }
            const centerOwner = await prisma.user.findUnique({
              where: {
                id: centerOwnerId,
              },
            });
            if (!centerOwner) {
              throw new Error('User not found');
            }
            await prisma.user.update({
              where: {
                id: centerOwnerId,
              },
              data: {
                role: Role.CENTER_OWNER,
              },
            });
            // update center status
            const updatedCenter = await prisma.center.update({
              ...query,
              where: {
                id: args.centerId,
              },
              data: {
                centerStatus: args.approve
                  ? CenterStatus.APPROVED
                  : CenterStatus.REJECTED,
              },
            });
            // mail to center owner if approved
            if (args.approve) {
              try {
                await this.mailService.sendTemplateEmail(
                  [centerOwner.email],
                  'Thông báo phê duyệt đăng ký trung tâm',
                  'CenterApproved',
                  {
                    CENTER_NAME: center.name,
                  },
                );
              } catch (error) {
                Logger.error(error, 'CenterSchema');
              }
            }
            if (!args.approve) {
              // mail to center owner if rejected
              try {
                await this.mailService.sendTemplateEmail(
                  [centerOwner.email],
                  'Thông báo từ chối đăng ký trung tâm',
                  'CenterRejected',
                  {
                    CENTER_NAME: center.name,
                    ADMIN_NOTE: args.adminNote,
                  },
                );
              } catch (error) {
                Logger.error(error, 'CenterSchema');
              }
            }
            return updatedCenter;
          });
        },
      }),
    }));
  }
}