import { Injectable } from '@nestjs/common';
import { InjectDataSource } from '@nestjs/typeorm';
import { DataSource } from 'typeorm';

@Injectable()
export class EmsService {
    constructor(
        @InjectDataSource('emsConnection')
        private dataSource: DataSource
    ) { }

    async getTypeRoles(): Promise<any[]> {
        const result = await this.dataSource.query(`
            SELECT * FROM "TypeRoles";
            `)
        return result
    }

    async getImages(city_id?: number, offset?: number, limit?: number): Promise<any[]> {
        const result = await this.dataSource.query(`
            SELECT * FROM "images"
            ${city_id ? `WHERE city_id = ${city_id}` : ''}
            ORDER BY city_id
            OFFSET ${offset || 0} ROWS
            FETCH NEXT ${limit || 10} ROWS ONLY;
            `)
        return result
    }

    async getFigures(year: number, city_id: number, offset?: number, limit?: number): Promise<any[]> {
        const result = await this.dataSource.query(`
            SELECT * FROM figures f
            JOIN vObjects o ON f.object_id = o.object_id WHERE o.id_city = ${city_id} AND f.year = ${year}
            ORDER BY f.year
            OFFSET ${Number(offset) || 0} ROWS
            FETCH NEXT ${Number(limit) || 10} ROWS ONLY;
            `)
        return result
    }
}