import { Injectable } from '@nestjs/common';
import { Prisma } from '@prisma/client';
import { PrismaService } from 'src/core/database/prisma.service';
import { TourStateMetaObjectType } from './accounting-arg.types';
import {
  AccountingFilter,
  createPrismaQueryFromAccountingFilters,
} from './accounting-filter';
import { AccountingState } from './accounting-state';

@Injectable()
export class AccountingValidationRepository {
  constructor(private readonly prisma: PrismaService) {}

  async findByState(
    state: AccountingState,
    filter: AccountingFilter,
    take?: number,
    skip?: number,
  ) {
    const checkValue = this.getCheckValueForAccountingState(state);
    const query: Prisma.TourFindManyArgs = {
      ...{
        ...(skip ? { skip, take: 10 } : {}),
        ...(take ? { take } : {}),
        ...(take && !skip ? { skip: 0 } : {}),
      },
      where: {
        check: checkValue,
        ...(checkValue === 2 && !filter?.deviation
          ? { revenueDeviation: { not: 0 } }
          : {}),
        empty: {
          not: null,
        },
        ticketId: {
          not: null,
        },
        AND: [
          ...createPrismaQueryFromAccountingFilters(filter),
          {
            OR: [
              {
                carName: null,
              },
              {
                AND: [
                  {
                    carName: {
                      not: 'Storno',
                    },
                  },
                  {
                    carName: {
                      not: 'Löschen',
                    },
                  },
                  {
                    carName: {
                      not: 'Abgabe',
                    },
                  },
                ],
              },
            ],
          },
          {
            deletedAt: null,
          },
          {
            OR: [
              { patientId: null },
              {
                AND: [
                  {
                    patientId: {
                      // Pause
                      not: 'b7424477-a4b2-42f7-b7e7-a4bef24f6979',
                    },
                  },
                  {
                    patientId: {
                      // Feierabend
                      not: '3554e1a9-9c07-45e5-b53c-692a77e4fa9a',
                    },
                  },
                ],
              },
            ],
          },
        ],
      },
      orderBy: { createdAt: 'desc' },
    };

    const [tours, count] = await this.prisma.$transaction([
      this.prisma.tour.findMany({ ...query }),
      this.prisma.tour.count({ where: query.where }),
    ]);
    return {
      tours,
      total: count,
    };
  }

  async calculateTourStateMeta(
    state: AccountingState,
  ): Promise<TourStateMetaObjectType> {
    const checkValue = this.getCheckValueForAccountingState(state);
    const ticketWithCurrentStateAndTours: Prisma.TourWhereInput = {
      check: checkValue,
      ...(checkValue === 2 ? { revenueDeviation: { not: 0 } } : {}),
      empty: {
        not: null,
      },
      ticketId: {
        not: null,
      },
      AND: [
        {
          OR: [
            {
              carName: null,
            },
            {
              AND: [
                {
                  carName: {
                    not: 'Storno',
                  },
                },
                {
                  carName: {
                    not: 'Löschen',
                  },
                },
                {
                  carName: {
                    not: 'Abgabe',
                  },
                },
              ],
            },
          ],
        },
        {
          deletedAt: null,
        },
        {
          OR: [
            { patientId: null },
            {
              AND: [
                {
                  patientId: {
                    // Pause
                    not: 'b7424477-a4b2-42f7-b7e7-a4bef24f6979',
                  },
                },
                {
                  patientId: {
                    // Feierabend
                    not: '3554e1a9-9c07-45e5-b53c-692a77e4fa9a',
                  },
                },
              ],
            },
          ],
        },
      ],
    };

    const [count, revenueSum] = await this.prisma.$transaction([
      this.prisma.tour.count({
        where: { ...ticketWithCurrentStateAndTours },
      }),
      this.prisma.tour.aggregate({
        _sum: {
          revenue: true,
        },
        where: {
          ...ticketWithCurrentStateAndTours,
        },
      }),
    ]);

    return {
      count,
      revenueSum: revenueSum._sum.revenue ?? 0,
    };
  }

  findTicketByTicketId(ticketId: string) {
    return this.prisma.ticket.findFirst({
      where: {
        id: ticketId,
      },
    });
  }

  private getCheckValueForAccountingState(state: AccountingState): number {
    switch (state) {
      case AccountingState.Billable:
        return 0;
      case AccountingState.PreparedForBilling:
        return 1;
      case AccountingState.Billed:
        return 2;
    }
  }
}