import { FastifyInstance } from 'fastify'
import { Like, Repository, Not } from 'typeorm'
import Decimal from 'decimal.js'
import { SysConfig } from '../entities/sys-config.entity'
import { CreateSysConfigBody } from '../dto/sys-config.dto'
import { UpdateSysConfigBody } from '../dto/sys-config.dto'
import { ConfigType } from '../entities/sys-config.entity'

export class SysConfigService {
  private app: FastifyInstance
  private sysConfigRepository: Repository<SysConfig>

  constructor(app: FastifyInstance) {
    this.app = app
    this.sysConfigRepository = app.dataSource.getRepository(SysConfig)
  }

  async getSysConfig(name: string) {
    const sysConfig = await this.sysConfigRepository.findOneOrFail({ where: { name } })
    return sysConfig
  }

  async maxTransferAmount(defaultAmount: Decimal) {
    const sysConfig = await this.sysConfigRepository.findOne({ where: { name: 'max_transfer_amount' } })
    if (sysConfig) {
      return new Decimal(sysConfig.value)
    }
    await this.sysConfigRepository.save({ name: 'max_transfer_amount', value: defaultAmount.toString() })
    return defaultAmount
  }

  async replaceType(defaultValue: number) {
    try {
      const sysConfig = await this.sysConfigRepository.findOne({ where: { name: 'replace_type' } })
      if (sysConfig) {
        return Number(sysConfig.value)
      }
      await this.sysConfigRepository.save({ name: 'replace_type', value: defaultValue.toString() })
    } catch (e) {
      this.app.log.error(e, 'get replaceType error')
    }
    return defaultValue
  }

  async getSensitiveWords() {
    try {
      const config = await this.sysConfigRepository.findOne({ where: { name: 'sensitive_words' } })
      if (config) {
        return { value: config.value }
      }
    } catch (e) {
      this.app.log.error(e, 'get sensitiveWords error')
    }
    return null
  }

  async updateSensitiveWords(words: string) {
    try {
      const config = await this.sysConfigRepository.findOne({ where: { name: 'sensitive_words' } })
      if (config) {
        config.value = words
        const sysConfig = await this.sysConfigRepository.save(config)
        return {
          value: sysConfig.value
        }
      }
      await this.sysConfigRepository.save({ name: 'sensitive_words', value: words })
    } catch (e) {
      this.app.log.error(e, 'update sensitiveWords error')
    }
  }

  async create(data: CreateSysConfigBody) {
    const existingConfig = await this.sysConfigRepository.findOne({ where: { name: data.name } })
    if (existingConfig) {
      throw new Error('配置名称已存在')
    }
    const config = this.sysConfigRepository.create(data)
    return await this.sysConfigRepository.save(config)
  }

  async update(name: string, data: UpdateSysConfigBody) {
    const config = await this.getSysConfig(name)
    Object.assign(config, data)
    return await this.sysConfigRepository.save(config)
  }

  async delete(name: string) {
    const config = await this.getSysConfig(name)
    return await this.sysConfigRepository.remove(config)
  }

  async list(page: number = 0, size: number = 20, name?: string, type?: ConfigType) {
    const where: any = {
      name: Not('sensitive_words')
    }

    if (name) {
      where.name = Like(`%${name}%`)
    }

    if (type) {
      where.type = type
    }

    const [data, total] = await this.sysConfigRepository.findAndCount({
      where,
      skip: page * size,
      take: size,
      order: {
        id: 'ASC'
      }
    })

    return {
      data,
      meta: {
        page,
        size,
        total,
        totalPages: Math.ceil(total / size)
      }
    }
  }

  async getConfigTypes() {
    return Object.values(ConfigType)
  }
}