import { Inject, Injectable } from '@nestjs/common';
import { and, eq, gte, ilike, lte, ne, or, sql } from 'drizzle-orm';
import { NodePgDatabase } from 'drizzle-orm/node-postgres';
import { WINSTON_MODULE_PROVIDER } from 'nest-winston';
import { BusinessListing, CommercialPropertyListing } from 'src/models/db.model.js';
import { Logger } from 'winston';
import * as schema from '../drizzle/schema.js';
import { PG_CONNECTION, businesses, commercials } from '../drizzle/schema.js';
import { FileService } from '../file/file.service.js';
import { JwtUser, ListingCriteria, emailToDirName } from '../models/main.model.js';

@Injectable()
export class ListingsService {
  constructor(
    @Inject(WINSTON_MODULE_PROVIDER) private readonly logger: Logger,
    @Inject(PG_CONNECTION) private conn: NodePgDatabase<typeof schema>,
    private fileService: FileService,
  ) {}
  private getConditions(criteria: ListingCriteria, table: typeof businesses | typeof commercials, user: JwtUser): any[] {
    const conditions = [];
    if (criteria.type) {
      conditions.push(eq(table.type, criteria.type));
    }
    if (criteria.state) {
      conditions.push(eq(table.state, criteria.state));
    }
    if (criteria.minPrice) {
      conditions.push(gte(table.price, criteria.minPrice));
    }
    if (criteria.maxPrice) {
      conditions.push(lte(table.price, criteria.maxPrice));
    }
    if (criteria.realEstateChecked) {
      conditions.push(eq(businesses.realEstateIncluded, true));
    }
    if (criteria.title) {
      conditions.push(ilike(table.title, `%${criteria.title}%`));
    }
    return conditions;
  }
  // ##############################################################
  // Listings general
  // ##############################################################

  async findCommercialPropertyListings(criteria: ListingCriteria, user: JwtUser): Promise<any> {
    const start = criteria.start ? criteria.start : 0;
    const length = criteria.length ? criteria.length : 12;
    const conditions = this.getConditions(criteria, commercials, user);
    if (!user || (!user?.roles?.includes('ADMIN') ?? false)) {
      conditions.push(or(eq(commercials.draft, false), eq(commercials.imagePath, emailToDirName(user?.username))));
    }
    const [data, total] = await Promise.all([
      this.conn
        .select()
        .from(commercials)
        .where(and(...conditions))
        .offset(start)
        .limit(length),
      this.conn
        .select({ count: sql`count(*)` })
        .from(commercials)
        .where(and(...conditions))
        .then(result => Number(result[0].count)),
    ]);
    return { total, data };
  }
  async findBusinessListings(criteria: ListingCriteria, user: JwtUser): Promise<any> {
    const start = criteria.start ? criteria.start : 0;
    const length = criteria.length ? criteria.length : 12;
    const conditions = this.getConditions(criteria, businesses, user);
    if (!user || (!user?.roles?.includes('ADMIN') ?? false)) {
      conditions.push(or(eq(businesses.draft, false), eq(businesses.imageName, emailToDirName(user?.username))));
    }
    const [data, total] = await Promise.all([
      this.conn
        .select()
        .from(businesses)
        .where(and(...conditions))
        .offset(start)
        .limit(length),
      this.conn
        .select({ count: sql`count(*)` })
        .from(businesses)
        .where(and(...conditions))
        .then(result => Number(result[0].count)),
    ]);
    return { total, data };
  }
  async findCommercialPropertiesById(id: string, user: JwtUser): Promise<CommercialPropertyListing> {
    let result = await this.conn
      .select()
      .from(commercials)
      .where(and(sql`${commercials.id} = ${id}`));
    result = result.filter(r => !r.draft || r.imagePath === emailToDirName(user?.username) || user?.roles.includes('ADMIN'));
    return result[0] as CommercialPropertyListing;
  }
  async findBusinessesById(id: string, user: JwtUser): Promise<CommercialPropertyListing> {
    let result = await this.conn
      .select()
      .from(businesses)
      .where(and(sql`${businesses.id} = ${id}`));
    result = result.filter(r => !r.draft || r.imageName === emailToDirName(user?.username) || user?.roles.includes('ADMIN'));
    return result[0] as BusinessListing;
  }
  async findCommercialPropertiesByEmail(email: string, user: JwtUser): Promise<CommercialPropertyListing[]> {
    const conditions = [];
    conditions.push(eq(commercials.imagePath, emailToDirName(email)));
    if (email !== user?.username && (!user?.roles?.includes('ADMIN') ?? false)) {
      conditions.push(ne(commercials.draft, true));
    }
    return (await this.conn
      .select()
      .from(commercials)
      .where(and(...conditions))) as CommercialPropertyListing[];
  }
  async findBusinessesByEmail(email: string, user: JwtUser): Promise<BusinessListing[]> {
    const conditions = [];
    conditions.push(eq(businesses.imageName, emailToDirName(email)));
    if (email !== user?.username && (!user?.roles?.includes('ADMIN') ?? false)) {
      conditions.push(ne(businesses.draft, true));
    }
    return (await this.conn
      .select()
      .from(businesses)
      .where(and(...conditions))) as CommercialPropertyListing[];
  }
  async findByImagePath(imagePath: string, serial: string): Promise<CommercialPropertyListing> {
    const result = await this.conn
      .select()
      .from(commercials)
      .where(and(sql`${commercials.imagePath} = ${imagePath}`, sql`${commercials.serialId} = ${serial}`));
    return result[0] as CommercialPropertyListing;
  }
  async createListing(data: BusinessListing | CommercialPropertyListing, table: typeof businesses | typeof commercials): Promise<BusinessListing | CommercialPropertyListing> {
    data.created = new Date();
    data.updated = new Date();
    const [createdListing] = await this.conn.insert(table).values(data).returning();
    return createdListing as BusinessListing | CommercialPropertyListing;
  }

  async updateCommercialPropertyListing(id: string, data: CommercialPropertyListing): Promise<BusinessListing | CommercialPropertyListing> {
    data.updated = new Date();
    data.created = new Date(data.created);
    const imageOrder = await this.fileService.getPropertyImages(data.imagePath, String(data.serialId));
    let difference = imageOrder.filter(x => !data.imageOrder.includes(x)).concat(data.imageOrder.filter(x => !imageOrder.includes(x)));
    if (difference.length > 0) {
      this.logger.warn(`changes between image directory and imageOrder in listing ${data.serialId}: ${difference.join(',')}`);
      data.imageOrder = imageOrder;
    }
    const [updateListing] = await this.conn.update(commercials).set(data).where(eq(commercials.id, id)).returning();
    return updateListing as BusinessListing | CommercialPropertyListing;
  }
  async updateBusinessListing(id: string, data: BusinessListing): Promise<BusinessListing | CommercialPropertyListing> {
    data.updated = new Date();
    data.created = new Date(data.created);
    const [updateListing] = await this.conn.update(businesses).set(data).where(eq(businesses.id, id)).returning();
    return updateListing as BusinessListing | CommercialPropertyListing;
  }
  async deleteListing(id: string, table: typeof businesses | typeof commercials): Promise<void> {
    await this.conn.delete(table).where(eq(table.id, id));
  }
  async getStates(table: typeof businesses | typeof commercials): Promise<any[]> {
    return await this.conn
      .select({ state: table.state, count: sql<number>`count(${table.id})`.mapWith(Number) })
      .from(table)
      .groupBy(sql`${table.state}`)
      .orderBy(sql`count desc`);
  }
  // ##############################################################
  // Images for commercial Properties
  // ##############################################################
  async deleteImage(imagePath: string, serial: string, name: string) {
    const listing = (await this.findByImagePath(imagePath, serial)) as unknown as CommercialPropertyListing;
    const index = listing.imageOrder.findIndex(im => im === name);
    if (index > -1) {
      listing.imageOrder.splice(index, 1);
      await this.updateCommercialPropertyListing(listing.id, listing);
    }
  }
  async addImage(imagePath: string, serial: string, imagename: string) {
    const listing = (await this.findByImagePath(imagePath, serial)) as unknown as CommercialPropertyListing;
    listing.imageOrder.push(imagename);
    await this.updateCommercialPropertyListing(listing.id, listing);
  }
}