import {
  Context,
  DAL,
  FindConfig,
  InternalModuleDeclaration,
  ModuleJoinerConfig,
  PricingContext,
  PricingFilters,
  PricingTypes,
} from "@medusajs/types"
import { Currency, MoneyAmount, PriceSet, RuleType } from "@models"
import {
  CurrencyService,
  MoneyAmountService,
  PriceSetService,
  RuleTypeService,
} from "@services"

import {
  InjectManager,
  InjectTransactionManager,
  MedusaContext,
  shouldForceTransaction,
} from "@medusajs/utils"

import { joinerConfig } from "../joiner-config"

type InjectedDependencies = {
  baseRepository: DAL.RepositoryService
  currencyService: CurrencyService<any>
  moneyAmountService: MoneyAmountService<any>
  ruleTypeService: RuleTypeService<any>
  priceSetService: PriceSetService<any>
}

export default class PricingModuleService<
  TPriceSet extends PriceSet = PriceSet,
  TMoneyAmount extends MoneyAmount = MoneyAmount,
  TCurrency extends Currency = Currency,
  TRuleType extends RuleType = RuleType
> implements PricingTypes.IPricingModuleService
{
  protected baseRepository_: DAL.RepositoryService
  protected readonly currencyService_: CurrencyService<TCurrency>
  protected readonly moneyAmountService_: MoneyAmountService<TMoneyAmount>
  protected readonly ruleTypeService_: RuleTypeService<TRuleType>
  protected readonly priceSetService_: PriceSetService<TPriceSet>

  constructor(
    {
      baseRepository,
      moneyAmountService,
      currencyService,
      ruleTypeService,
      priceSetService,
    }: InjectedDependencies,
    protected readonly moduleDeclaration: InternalModuleDeclaration
  ) {
    this.baseRepository_ = baseRepository
    this.currencyService_ = currencyService
    this.moneyAmountService_ = moneyAmountService
    this.ruleTypeService_ = ruleTypeService
    this.priceSetService_ = priceSetService
  }

  __joinerConfig(): ModuleJoinerConfig {
    return joinerConfig
  }

  @InjectManager("baseRepository_")
  async calculatePrices(
    pricingFilters: PricingFilters,
    pricingContext: PricingContext = { context: {} },
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.CalculatedPriceSetDTO> {
    // Keeping this whole logic raw in here for now as they will undergo
    // some changes, will abstract them out once we have a final version
    const context = pricingContext.context || {}
    const priceSetFilters: PricingTypes.FilterablePriceSetProps = {
      id: pricingFilters.id,
    }

    const priceSets = await this.list(
      priceSetFilters,
      {
        select: [
          "id",
          "money_amounts.id",
          "money_amounts.currency_code",
          "money_amounts.amount",
          "money_amounts.min_quantity",
          "money_amounts.max_quantity",
        ],
        relations: ["money_amounts"],
      },
      sharedContext
    )

    const calculatedPrices = priceSets.map(
      (priceSet): PricingTypes.CalculatedPriceSetDTO => {
        // TODO: This will change with the rules engine selection,
        // making a DB query directly instead
        // This should look for a default price when no rules apply
        // When no price is set, return null values for all cases
        const selectedMoneyAmount = priceSet.money_amounts?.find(
          (ma) =>
            context.currency_code && ma.currency_code === context.currency_code
        )

        return {
          id: priceSet.id,
          amount: selectedMoneyAmount?.amount || null,
          currency_code: selectedMoneyAmount?.currency_code || null,
          min_quantity: selectedMoneyAmount?.min_quantity || null,
          max_quantity: selectedMoneyAmount?.max_quantity || null,
        }
      }
    )

    return JSON.parse(JSON.stringify(calculatedPrices))
  }

  @InjectManager("baseRepository_")
  async retrieve(
    id: string,
    config: FindConfig<PricingTypes.PriceSetDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.PriceSetDTO> {
    const priceSet = await this.priceSetService_.retrieve(
      id,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.PriceSetDTO>(priceSet, {
      populate: true,
    })
  }

  @InjectManager("baseRepository_")
  async list(
    filters: PricingTypes.FilterablePriceSetProps = {},
    config: FindConfig<PricingTypes.PriceSetDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.PriceSetDTO[]> {
    const priceSets = await this.priceSetService_.list(
      filters,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.PriceSetDTO[]>(
      priceSets,
      {
        populate: true,
      }
    )
  }

  @InjectManager("baseRepository_")
  async listAndCount(
    filters: PricingTypes.FilterablePriceSetProps = {},
    config: FindConfig<PricingTypes.PriceSetDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<[PricingTypes.PriceSetDTO[], number]> {
    const [priceSets, count] = await this.priceSetService_.listAndCount(
      filters,
      config,
      sharedContext
    )

    return [
      await this.baseRepository_.serialize<PricingTypes.PriceSetDTO[]>(
        priceSets,
        {
          populate: true,
        }
      ),
      count,
    ]
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async create(
    data: PricingTypes.CreatePriceSetDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const priceSets = await this.priceSetService_.create(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.PriceSetDTO[]>(
      priceSets,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async update(
    data: PricingTypes.UpdatePriceSetDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const priceSets = await this.priceSetService_.update(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.PriceSetDTO[]>(
      priceSets,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async delete(
    ids: string[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<void> {
    await this.priceSetService_.delete(ids, sharedContext)
  }

  @InjectManager("baseRepository_")
  async retrieveMoneyAmount(
    id: string,
    config: FindConfig<PricingTypes.MoneyAmountDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.MoneyAmountDTO> {
    const moneyAmount = await this.moneyAmountService_.retrieve(
      id,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.MoneyAmountDTO>(
      moneyAmount,
      {
        populate: true,
      }
    )
  }

  @InjectManager("baseRepository_")
  async listMoneyAmounts(
    filters: PricingTypes.FilterableMoneyAmountProps = {},
    config: FindConfig<PricingTypes.MoneyAmountDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.MoneyAmountDTO[]> {
    const moneyAmounts = await this.moneyAmountService_.list(
      filters,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.MoneyAmountDTO[]>(
      moneyAmounts,
      {
        populate: true,
      }
    )
  }

  @InjectManager("baseRepository_")
  async listAndCountMoneyAmounts(
    filters: PricingTypes.FilterableMoneyAmountProps = {},
    config: FindConfig<PricingTypes.MoneyAmountDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<[PricingTypes.MoneyAmountDTO[], number]> {
    const [moneyAmounts, count] = await this.moneyAmountService_.listAndCount(
      filters,
      config,
      sharedContext
    )

    return [
      await this.baseRepository_.serialize<PricingTypes.MoneyAmountDTO[]>(
        moneyAmounts,
        {
          populate: true,
        }
      ),
      count,
    ]
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async createMoneyAmounts(
    data: PricingTypes.CreateMoneyAmountDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const moneyAmounts = await this.moneyAmountService_.create(
      data,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.MoneyAmountDTO[]>(
      moneyAmounts,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async updateMoneyAmounts(
    data: PricingTypes.UpdateMoneyAmountDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const moneyAmounts = await this.moneyAmountService_.update(
      data,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.MoneyAmountDTO[]>(
      moneyAmounts,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async deleteMoneyAmounts(
    ids: string[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<void> {
    await this.moneyAmountService_.delete(ids, sharedContext)
  }

  @InjectManager("baseRepository_")
  async retrieveCurrency(
    code: string,
    config: FindConfig<PricingTypes.CurrencyDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.CurrencyDTO> {
    const currency = await this.currencyService_.retrieve(
      code,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.CurrencyDTO>(currency, {
      populate: true,
    })
  }

  @InjectManager("baseRepository_")
  async listCurrencies(
    filters: PricingTypes.FilterableCurrencyProps = {},
    config: FindConfig<PricingTypes.CurrencyDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.CurrencyDTO[]> {
    const currencies = await this.currencyService_.list(
      filters,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.CurrencyDTO[]>(
      currencies,
      {
        populate: true,
      }
    )
  }

  @InjectManager("baseRepository_")
  async listAndCountCurrencies(
    filters: PricingTypes.FilterableCurrencyProps = {},
    config: FindConfig<PricingTypes.CurrencyDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<[PricingTypes.CurrencyDTO[], number]> {
    const [currencies, count] = await this.currencyService_.listAndCount(
      filters,
      config,
      sharedContext
    )

    return [
      await this.baseRepository_.serialize<PricingTypes.CurrencyDTO[]>(
        currencies,
        {
          populate: true,
        }
      ),
      count,
    ]
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async createCurrencies(
    data: PricingTypes.CreateCurrencyDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const currencies = await this.currencyService_.create(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.CurrencyDTO[]>(
      currencies,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async updateCurrencies(
    data: PricingTypes.UpdateCurrencyDTO[],
    @MedusaContext() sharedContext: Context = {}
  ) {
    const currencies = await this.currencyService_.update(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.CurrencyDTO[]>(
      currencies,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async deleteCurrencies(
    currencyCodes: string[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<void> {
    await this.currencyService_.delete(currencyCodes, sharedContext)
  }

  @InjectManager("baseRepository_")
  async retrieveRuleType(
    id: string,
    config: FindConfig<PricingTypes.RuleTypeDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.RuleTypeDTO> {
    const ruleType = await this.ruleTypeService_.retrieve(
      id,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.RuleTypeDTO>(ruleType, {
      populate: true,
    })
  }

  @InjectManager("baseRepository_")
  async listRuleTypes(
    filters: PricingTypes.FilterableRuleTypeProps = {},
    config: FindConfig<PricingTypes.RuleTypeDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.RuleTypeDTO[]> {
    const ruleTypes = await this.ruleTypeService_.list(
      filters,
      config,
      sharedContext
    )

    return this.baseRepository_.serialize<PricingTypes.RuleTypeDTO[]>(
      ruleTypes,
      {
        populate: true,
      }
    )
  }

  @InjectManager("baseRepository_")
  async listAndCountRuleTypes(
    filters: PricingTypes.FilterableRuleTypeProps = {},
    config: FindConfig<PricingTypes.RuleTypeDTO> = {},
    @MedusaContext() sharedContext: Context = {}
  ): Promise<[PricingTypes.RuleTypeDTO[], number]> {
    const [ruleTypes, count] = await this.ruleTypeService_.listAndCount(
      filters,
      config,
      sharedContext
    )

    return [
      await this.baseRepository_.serialize<PricingTypes.RuleTypeDTO[]>(
        ruleTypes,
        {
          populate: true,
        }
      ),
      count,
    ]
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async createRuleTypes(
    data: PricingTypes.CreateRuleTypeDTO[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.RuleTypeDTO[]> {
    const ruleTypes = await this.ruleTypeService_.create(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.RuleTypeDTO[]>(
      ruleTypes,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async updateRuleTypes(
    data: PricingTypes.UpdateRuleTypeDTO[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<PricingTypes.RuleTypeDTO[]> {
    const ruleTypes = await this.ruleTypeService_.update(data, sharedContext)

    return this.baseRepository_.serialize<PricingTypes.RuleTypeDTO[]>(
      ruleTypes,
      {
        populate: true,
      }
    )
  }

  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
  async deleteRuleTypes(
    ruleTypes: string[],
    @MedusaContext() sharedContext: Context = {}
  ): Promise<void> {
    await this.ruleTypeService_.delete(ruleTypes, sharedContext)
  }
}