// server/supabase/functions/_shared/payple.ts
// Payple 결제 API 래퍼 — 파트너 인증, 빌링 결제, 취소, 빌링키 해지

// ── 타입 ──────────────────────────────────────────────

export interface PaypleConfig {
  cstId: string
  custKey: string
  refundKey: string
  clientKey: string
  isTest: boolean
  baseUrl: string        // 'https://cpay.payple.kr' or 'https://democpay.payple.kr'
}

export interface PaypleAuthResult {
  PCD_CST_ID: string     // 암호화된 상점 ID
  PCD_CUST_KEY: string   // 암호화된 고객 키
  PCD_AUTH_KEY: string    // 인증 토큰
  PCD_PAY_HOST: string   // 결제 요청 호스트
  PCD_PAY_URL: string    // 결제 요청 URL
}

export interface PaypleBillingResult {
  PCD_PAY_RST: 'success' | 'error'
  PCD_PAY_CODE: string
  PCD_PAY_MSG: string
  PCD_PAY_OID: string
  PCD_PAY_TYPE: string
  PCD_PAY_TOTAL: string
  PCD_PAY_CARDNAME?: string
  PCD_PAY_CARDNUM?: string
  PCD_PAY_CARDAUTHNO?: string
  PCD_PAY_CARDTRADENUM?: string
  PCD_PAY_CARDRECEIPT?: string
  PCD_PAYER_ID?: string
}

export interface PaypleCancelResult {
  PCD_PAY_RST: 'success' | 'error'
  PCD_PAY_CODE: string
  PCD_PAY_MSG: string
  PCD_PAY_OID: string
  PCD_REFUND_TOTAL: string
}

// ── 환경변수에서 설정 로드 ──────────────────────────────

export function getPaypleConfig(): PaypleConfig {
  // @ts-expect-error — Deno.env
  const cstId = Deno.env.get('PAYPLE_CST_ID') ?? 'test'
  // @ts-expect-error — Deno.env
  const custKey = Deno.env.get('PAYPLE_CUST_KEY') ?? 'abcd1234567890'
  // @ts-expect-error — Deno.env
  const refundKey = Deno.env.get('PAYPLE_REFUND_KEY') ?? 'a41ce010ede9fcbfb3be86b24858806596a9db68b79d138b147c3e563e1829a0'
  // @ts-expect-error — Deno.env
  const clientKey = Deno.env.get('PAYPLE_CLIENT_KEY') ?? 'test_DF55F29DA654A8CBC0F0A9DD4B556486'

  const isTest = cstId === 'test'
  const baseUrl = isTest ? 'https://democpay.payple.kr' : 'https://cpay.payple.kr'

  return { cstId, custKey, refundKey, clientKey, isTest, baseUrl }
}

// ── Referer 헤더 ──────────────────────────────────────

function getReferer(): string {
  // @ts-expect-error — Deno.env
  const siteUrl = Deno.env.get('PAYPLE_SITE_URL') ?? Deno.env.get('SITE_URL') ?? 'https://d3ro.dev'
  return siteUrl
}

// ── 파트너 인증 ───────────────────────────────────────

export async function paypleAuth(
  config: PaypleConfig,
  options?: {
    cancelFlag?: boolean    // PCD_PAYCANCEL_FLAG
    simpleFlag?: boolean    // PCD_SIMPLE_FLAG (빌링 결제용)
    payWork?: string        // PCD_PAY_WORK (PUSERDEL 등)
  }
): Promise<PaypleAuthResult> {
  const body: Record<string, string> = {
    cst_id: config.cstId,
    custKey: config.custKey,
  }

  if (options?.cancelFlag) {
    body['PCD_PAYCANCEL_FLAG'] = 'Y'
  } else if (options?.simpleFlag) {
    body['PCD_PAY_TYPE'] = 'card'
    body['PCD_SIMPLE_FLAG'] = 'Y'
  } else if (options?.payWork) {
    body['PCD_PAY_WORK'] = options.payWork
  }

  const resp = await fetch(`${config.baseUrl}/php/auth.php`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'no-cache',
      'Referer': getReferer(),
    },
    body: JSON.stringify(body),
  })

  if (!resp.ok) {
    throw new Error(`Payple auth failed: HTTP ${resp.status}`)
  }

  const data = await resp.json() as Record<string, string>
  if (data['result'] !== 'success') {
    throw new Error(`Payple auth error: ${data['result_msg'] ?? data['cst_id'] ?? 'unknown'}`)
  }

  return {
    PCD_CST_ID: data['cst_id'] ?? '',
    PCD_CUST_KEY: data['custKey'] ?? '',
    PCD_AUTH_KEY: data['AuthKey'] ?? '',
    PCD_PAY_HOST: data['PCD_PAY_HOST'] ?? config.baseUrl,
    PCD_PAY_URL: data['PCD_PAY_URL'] ?? '',
  }
}

// ── 빌링키로 결제 ────────────────────────────────────

export async function paypleBilling(
  config: PaypleConfig,
  auth: PaypleAuthResult,
  params: {
    payerId: string           // PCD_PAYER_ID (빌링키)
    amount: number            // 결제 금액 (원)
    orderId: string           // 주문번호
    goodsName: string         // 상품명
  }
): Promise<PaypleBillingResult> {
  const url = auth.PCD_PAY_HOST
    ? `${auth.PCD_PAY_HOST}/php/SimplePayCardAct.php?ACT_=PAYM`
    : `${config.baseUrl}/php/SimplePayCardAct.php?ACT_=PAYM`

  const resp = await fetch(url, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'no-cache',
      'Referer': getReferer(),
    },
    body: JSON.stringify({
      PCD_CST_ID: auth.PCD_CST_ID,
      PCD_CUST_KEY: auth.PCD_CUST_KEY,
      PCD_AUTH_KEY: auth.PCD_AUTH_KEY,
      PCD_PAY_TYPE: 'card',
      PCD_PAYER_ID: params.payerId,
      PCD_PAY_GOODS: params.goodsName,
      PCD_PAY_TOTAL: String(params.amount),
      PCD_PAY_OID: params.orderId,
      PCD_SIMPLE_FLAG: 'Y',
    }),
  })

  if (!resp.ok) {
    throw new Error(`Payple billing failed: HTTP ${resp.status}`)
  }

  const data = await resp.json() as PaypleBillingResult
  if (data.PCD_PAY_RST !== 'success') {
    throw new Error(`Payple billing error: ${data.PCD_PAY_MSG} (${data.PCD_PAY_CODE})`)
  }

  return data
}

// ── 결제 취소/환불 ────────────────────────────────────

export async function paypleCancel(
  config: PaypleConfig,
  auth: PaypleAuthResult,
  params: {
    payOid: string           // 원거래 주문번호
    payDate: string          // 결제일자 (YYYYMMDD)
    refundTotal: number      // 환불 금액
  }
): Promise<PaypleCancelResult> {
  const resp = await fetch(`${config.baseUrl}/php/account/api/cPayCAct.php`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'no-cache',
      'Referer': getReferer(),
    },
    body: JSON.stringify({
      PCD_CST_ID: auth.PCD_CST_ID,
      PCD_CUST_KEY: auth.PCD_CUST_KEY,
      PCD_AUTH_KEY: auth.PCD_AUTH_KEY,
      PCD_REFUND_KEY: config.refundKey,
      PCD_PAYCANCEL_FLAG: 'Y',
      PCD_PAY_OID: params.payOid,
      PCD_PAY_DATE: params.payDate,
      PCD_REFUND_TOTAL: String(params.refundTotal),
    }),
  })

  if (!resp.ok) {
    throw new Error(`Payple cancel failed: HTTP ${resp.status}`)
  }

  const data = await resp.json() as PaypleCancelResult
  if (data.PCD_PAY_RST !== 'success') {
    throw new Error(`Payple cancel error: ${data.PCD_PAY_MSG} (${data.PCD_PAY_CODE})`)
  }

  return data
}

// ── 빌링키 해지 ──────────────────────────────────────

export async function paypleDeleteBillingKey(
  config: PaypleConfig,
  auth: PaypleAuthResult,
  payerId: string
): Promise<void> {
  const url = auth.PCD_PAY_HOST
    ? `${auth.PCD_PAY_HOST}/php/cPayUser/api/cPayUserAct.php?ACT_=PUSERDEL`
    : `${config.baseUrl}/php/cPayUser/api/cPayUserAct.php?ACT_=PUSERDEL`

  const resp = await fetch(url, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'no-cache',
      'Referer': getReferer(),
    },
    body: JSON.stringify({
      PCD_CST_ID: auth.PCD_CST_ID,
      PCD_CUST_KEY: auth.PCD_CUST_KEY,
      PCD_AUTH_KEY: auth.PCD_AUTH_KEY,
      PCD_PAYER_ID: payerId,
    }),
  })

  if (!resp.ok) {
    throw new Error(`Payple delete billing key failed: HTTP ${resp.status}`)
  }

  const data = await resp.json() as { PCD_PAY_RST: string; PCD_PAY_MSG?: string }
  if (data.PCD_PAY_RST !== 'success') {
    throw new Error(`Payple delete billing key error: ${data.PCD_PAY_MSG ?? 'unknown'}`)
  }
}

// ── 주문번호 생성 유틸리티 ─────────────────────────────

export function generateOrderId(userId: string): string {
  const now = new Date()
  const ts = now.toISOString().replace(/[-:T.Z]/g, '').substring(0, 14)
  const short = userId.substring(0, 8)
  return `D3RO-${ts}-${short}`
}

// ── 구독 기간 계산 ────────────────────────────────────

export function calcSubscriptionPeriod(): { start: string; end: string } {
  const now = new Date()
  const end = new Date(now)
  end.setMonth(end.getMonth() + 1)
  return {
    start: now.toISOString(),
    end: end.toISOString(),
  }
}

// ── 티어별 가격 ──────────────────────────────────────

export const TIER_PRICE: Record<string, number> = {
  pro: 9900,
  pro_plus: 29900,
}

export const TIER_GOODS_NAME: Record<string, string> = {
  pro: 'D3RO Voice Pro',
  pro_plus: 'D3RO Voice Pro+',
}