import {z} from 'zod'

export type YearMonth = string;

export type CreateApiV1ComparisonsArgs = {body: {yearMonth: YearMonth, supplyPoint: {postalCode: string, city: string, residential?: boolean | undefined, meterType?: ('Digital' | 'Analog') | undefined, tariffType?: ('enkelvoudig' | 'tweevoudig' | 'nachtmeter') | undefined, hasExclusiveNightRegister?: boolean | undefined, connectionCapacityInKva?: number | undefined}, consumption: {electricity?: ({totalConsumption?: (number | null) | undefined, dayConsumption?: (number | null) | undefined, nightConsumption?: (number | null) | undefined, peakConsumption?: (number | null) | undefined, exclusiveNightConsumption?: (number | null) | undefined, injection?: (number | null) | undefined, injectionDay?: (number | null) | undefined, injectionNight?: (number | null) | undefined}) | undefined, gas?: {totalConsumption: number} | undefined}, productVersionIds?: (Array<string> | null) | undefined, applicability?: ({hasSolarPanels?: (boolean | null) | undefined, hasElectricVehicle?: (boolean | null) | undefined, interestedInSolarInstallation?: (boolean | null) | undefined}) | undefined}};

export type CreateApiV1ComparisonsOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const country = z.string().min(2).max(2);

export const merchant = z.object({id: z.string(), canonicalName: z.string(), displayName: z.string(), website: z.string().nullable(), hasNativeApp: z.boolean().nullable(), cooperative: z.boolean().nullable(), automatedSwitch: z.boolean(), vregServicecheckRating: z.number().int().gte(1).lte(5).nullable(), vregComplaintsPerThousand: z.number().gte(0).nullable(), country: country});

export const product = z.object({id: z.string(), productName: z.string(), energyType: z.enum(["ELECTRICITY", "GAS"]), priceModel: z.enum(["FIXED", "VARIABLE", "DYNAMIC"]), subType: z.string().nullable(), serviceArea: z.object({country: country, region: z.enum(["Flanders", "BrusselsCapitalRegion", "Wallonia"])}), characteristics: z.object({directDebitOnly: z.boolean().nullable(), emailInvoiceOnly: z.boolean().nullable(), onlineServiceOnly: z.boolean().nullable(), greenEnergy: z.boolean().nullable(), greenEnergyAndLocal: z.boolean().nullable(), contractDuration: z.enum(["1 year", "2 years", "3 years", "4 years", "5 years", "10 years", "UNDETERMINED"]).nullable(), priceCertaintyPeriod: z.enum(["none", "1 month", "2 months", "3 months", "4 months", "5 months", "6 months", "7 months", "8 months", "9 months", "10 months", "11 months", "1 year", "2 years", "3 years", "4 years", "5 years", "10 years"]).nullable(), onlyForClientWithSolar: z.boolean().nullable(), onlyForClientWithEV: z.boolean().nullable(), includesSolarPanels: z.boolean().nullable(), includesChargingStation: z.boolean().nullable(), groupPurchase: z.boolean().nullable(), cooperative: z.boolean().nullable()}), conditions: z.array(z.object({title: z.string(), description: z.string().nullable()})), merchant: merchant});

export const comparisonResult = z.object({electricity: z.array(z.object({productDetails: z.object({merchant: merchant, product: product, version: z.object({id: z.string(), versionDate: z.string(), tariffCardUrl: z.string().nullable(), hasVwalaDiscount: z.boolean(), testAankoopDestinationNl: z.string().optional(), testAankoopDestinationFr: z.string().optional()})}), costBreakdown: z.object({energyCost: z.object({costCategories: z.array(z.object({key: z.string(), lineItems: z.array(z.object({key: z.string(), unitPrice: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()}), quantity: z.object({value: z.number().nullable().optional(), unit: z.string().nullable().optional()}), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), grandTotal: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})}), injectionFee: z.object({costCategories: z.array(z.object({key: z.string(), lineItems: z.array(z.object({key: z.string(), unitPrice: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()}), quantity: z.object({value: z.number().nullable().optional(), unit: z.string().nullable().optional()}), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), grandTotal: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})}).nullable(), discounts: z.object({lineItems: z.array(z.object({name: z.string().optional(), description: z.string().nullable().optional(), valueType: z.string(), originalValue: z.number(), calculatedAmountYearly: z.number(), appliesTo: z.string(), timing: z.string(), timingMonths: z.number().nullable()})), totals: z.object({yearly: z.number(), monthly: z.number()})}).nullable().optional()}), totals: z.object({monthly: z.object({flat: z.number().nullable(), withInjectionSubtracted: z.number().nullable(), withDiscountsApplied: z.number().nullable(), withInjectionAndDiscountsApplied: z.number().nullable()}), yearly: z.object({flat: z.number().nullable(), withInjectionSubtracted: z.number().nullable(), withDiscountsApplied: z.number().nullable(), withInjectionAndDiscountsApplied: z.number().nullable()})}), bestBuy: z.boolean().optional()})), gas: z.array(z.object({productDetails: z.object({merchant: merchant, product: product, version: z.object({id: z.string(), versionDate: z.string(), tariffCardUrl: z.string().nullable(), hasVwalaDiscount: z.boolean(), testAankoopDestinationNl: z.string().optional(), testAankoopDestinationFr: z.string().optional()})}), costBreakdown: z.object({energyCost: z.object({costCategories: z.array(z.object({key: z.string(), lineItems: z.array(z.object({key: z.string(), unitPrice: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()}), quantity: z.object({value: z.number().nullable().optional(), unit: z.string().nullable().optional()}), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), grandTotal: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})}), injectionFee: z.object({costCategories: z.array(z.object({key: z.string(), lineItems: z.array(z.object({key: z.string(), unitPrice: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()}), quantity: z.object({value: z.number().nullable().optional(), unit: z.string().nullable().optional()}), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), total: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})})), grandTotal: z.object({value: z.object({exclVat: z.number().nullable().optional(), inclVat: z.number().nullable().optional()}), unit: z.string().nullable().optional()})}).nullable(), discounts: z.object({lineItems: z.array(z.object({name: z.string().optional(), description: z.string().nullable().optional(), valueType: z.string(), originalValue: z.number(), calculatedAmountYearly: z.number(), appliesTo: z.string(), timing: z.string(), timingMonths: z.number().nullable()})), totals: z.object({yearly: z.number(), monthly: z.number()})}).nullable().optional()}), totals: z.object({monthly: z.object({flat: z.number().nullable(), withInjectionSubtracted: z.number().nullable(), withDiscountsApplied: z.number().nullable(), withInjectionAndDiscountsApplied: z.number().nullable()}), yearly: z.object({flat: z.number().nullable(), withInjectionSubtracted: z.number().nullable(), withDiscountsApplied: z.number().nullable(), withInjectionAndDiscountsApplied: z.number().nullable()})}), bestBuy: z.boolean().optional()}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Compare energy products for a month
 * 
 * POST /v1/comparisons
 */
export const createApiV1Comparisons = async (args: CreateApiV1ComparisonsArgs, options?: CreateApiV1ComparisonsOptions) => {
const {baseUrl = "https://open-energie.api.vwala.be", fetch: fetchFn = fetch, apiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/comparisons${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(comparisonResult, await res.json())
};