import { Inject, Injectable, Logger } from '@nestjs/common'
import { PersonalMilestoneStatus, ScheduleStatus } from '@prisma/client'
import { Pothos, PothosRef, PothosSchema, SchemaBuilderToken } from '@smatch-corp/nestjs-pothos'
import { Builder } from '../Graphql/graphql.builder'
import { PrismaService } from '../Prisma/prisma.service'

@Injectable()
export class PersonalMilestoneSchema extends PothosSchema {
  constructor(
    @Inject(SchemaBuilderToken) private readonly builder: Builder,
    private readonly prisma: PrismaService,
  ) {
    super()
  }

  @PothosRef()
  personalMilestone() {
    return this.builder.prismaObject('PersonalMilestone', {
      fields: (t) => ({
        id: t.exposeID('id', {
          description: 'The ID of the personal milestone.',
        }),
        milestoneOrder: t.exposeInt('milestoneOrder', {
          description: 'The order of the personal milestone.',
        }),
        scheduleId: t.exposeString('scheduleId', {
          description: 'The ID of the schedule the personal milestone belongs to.',
        }),
        schedule: t.relation('schedule', {
          description: 'The schedule the personal milestone belongs to.',
        }),
        userId: t.exposeString('userId', {
          description: 'The ID of the user the personal milestone belongs to.',
        }),
        user: t.relation('user', {
          description: 'The user the personal milestone belongs to.',
        }),
        title: t.exposeString('title', {
          description: 'The title of the personal milestone.',
        }),
        description: t.exposeString('description', {
          description: 'The description of the personal milestone.',
        }),
        status: t.expose('status', {
          type: PersonalMilestoneStatus,
          description: 'The status of the personal milestone.',
        }),
        createdAt: t.expose('createdAt', {
          type: 'DateTime',
          description: 'The date the personal milestone was created.',
        }),
        updatedAt: t.expose('updatedAt', {
          type: 'DateTime',
          description: 'The date the personal milestone was last updated.',
        }),
      }),
    })
  }

  @Pothos()
  init(): void {
    this.builder.queryFields((t) => ({
      personalMilestone: t.prismaField({
        type: this.personalMilestone(),
        args: this.builder.generator.findUniqueArgs('PersonalMilestone'),
        description: 'Retrieve a single personal milestone by its unique identifier.',
        resolve: async (_query, _root, args, ctx, _info) => {
          if (!ctx.me) {
            throw new Error('Cannot get your info')
          }
          return this.prisma.personalMilestone.findUnique({
            where: args.where,
          })
        },
      }),
      personalMilestones: t.prismaField({
        type: [this.personalMilestone()],
        args: this.builder.generator.findManyArgs('PersonalMilestone'),
        description: 'Retrieve multiple personal milestones.',
        resolve: async (_query, _root, args, ctx, _info) => {
          if (!ctx.me) {
            throw new Error('Cannot get your info')
          }
          return this.prisma.personalMilestone.findMany({
            where: args.filter ?? undefined,
            orderBy: args.orderBy ?? undefined,
            skip: args.skip ?? undefined,
            take: args.take ?? undefined,
            cursor: args.cursor ?? undefined,
          })
        },
      }),
    }))
    this.builder.mutationFields((t) => ({
      createManyPersonalMilestones: t.prismaField({
        type: [this.personalMilestone()],
        args: {
          scheduleId: t.arg({
            type: 'String',
            description: 'The ID of the schedule the personal milestone belongs to.',
            required: true,
          }),
          userId: t.arg({
            type: 'String',
            description: 'The ID of the user the personal milestone belongs to.',
            required: true,
          }),
          data: t.arg({
            type: [this.builder.generator.getCreateManyInput('PersonalMilestone', ['schedule', 'user'])],
            description: 'The data for the personal milestone.',
            required: true,
          }),
        },
        description: 'Create multiple personal milestones.',
        resolve: async (_query, _root, args, ctx, _info) => {
          if (!ctx.me) {
            throw new Error('Cannot get your info')
          }
          const userId = ctx.me.id
          const result = await this.prisma.personalMilestone.createManyAndReturn({
            data: args.data.map((data) => ({
              ...data,
              userId,
              scheduleId: args.scheduleId,
            })),
            skipDuplicates: true,
          })
          // update schedule status to IN_PROGRESS
          await this.prisma.schedule.update({
            where: { id: args.scheduleId },
            data: { status: ScheduleStatus.IN_PROGRESS },
          })
          return result
        },
      }),
      updatePersonalMilestone: t.prismaField({
        type: this.personalMilestone(),
        args: {
          where: t.arg({
            type: this.builder.generator.getWhereUnique('PersonalMilestone'),
            description: 'The where clause for the personal milestone.',
            required: true,
          }),
          data: t.arg({
            type: this.builder.generator.getUpdateInput('PersonalMilestone'),
            description: 'The data for the personal milestone.',
            required: true,
          }),
        },
        description: 'Update a personal milestone.',
        resolve: async (_query, _root, args, ctx, _info) => {
          if (!ctx.me) {
            throw new Error('Cannot get your info')
          }
          const userId = ctx.me.id
          return this.prisma.personalMilestone.update({
            where: {
              ...args.where,
              userId,
            },
            data: args.data,
          })
        },
      }),
      deletePersonalMilestone: t.prismaField({
        type: this.personalMilestone(),
        args: {
          personalMilestoneId: t.arg({
            type: 'String',
            description: 'The ID of the personal milestone to delete.',
            required: true,
          }),
        },
        description: 'Delete a personal milestone.',
        resolve: async (_query, _root, args, ctx, _info) => {
          if (!ctx.me) {
            throw new Error('Cannot get your info')
          }
          // check if the user is mentor of the schedule where the personal milestone belongs to
          const personalMilestone = await this.prisma.personalMilestone.findUnique({
            where: { id: args.personalMilestoneId },
          })
          const schedule = await this.prisma.schedule.findUnique({
            where: { id: personalMilestone?.scheduleId },
          })
          if (schedule?.managedServiceId) {
            const managedService = await this.prisma.managedService.findUnique({
              where: { id: schedule.managedServiceId },
            })
            if (managedService?.mentorId !== ctx.me.id) {
              throw new Error('Unauthorized')
            }
          }
          return this.prisma.personalMilestone.delete({
            where: {
              id: args.personalMilestoneId,
            },
          })
        },
      }),
    }))
  }
}