package comm

import (
	"net/http"
	"strings"

	"github.com/GMWalletApp/epusdt/model/request"
	"github.com/GMWalletApp/epusdt/model/response"
	"github.com/GMWalletApp/epusdt/model/service"
	"github.com/GMWalletApp/epusdt/util/constant"
	"github.com/labstack/echo/v4"
)

// CheckoutCounter 收银台
// @Summary      Checkout counter page
// @Description  Return checkout initialization data when the order exists. This endpoint only confirms order existence and returns base order data; call /pay/check-status/{trade_id} for the current order status (1=waiting payment, 2=paid, 3=expired, 4=waiting token/network selection).
// @Description  When status=4, actual_amount is 0 and token/network/receive_address are empty; this state is produced by GMPay placeholders or EPay submit.php when no token/network request values or defaults resolve to a concrete payment asset. The cashier should guide the payer to choose an on-chain token/network or OkPay and then call /pay/switch-network.
// @Description  For EPay orders with a merchant return_url, the response redirect_url is rewritten to the internal /pay/return/{trade_id} hop; the database still stores the merchant's raw return_url.
// @Tags         Payment
// @Produce      json
// @Param        trade_id path string true "Trade ID"
// @Success      200 {object} response.ApiResponse{data=response.CheckoutCounterResponse}
// @Failure      400 {object} response.ApiResponse "Order not found (status_code=10008) or other request error"
// @Router       /pay/checkout-counter-resp/{trade_id} [get]
func (c *BaseCommController) CheckoutCounter(ctx echo.Context) (err error) {
	tradeId := ctx.Param("trade_id")
	resp, err := service.GetCheckoutCounterByTradeId(tradeId)
	if err != nil {
		return c.FailJson(ctx, err)
	}

	return c.SucJson(ctx, resp)
}

// ReturnToMerchant performs the browser-facing EPay success return hop.
// Non-EPay or not-yet-paid orders are sent back to the checkout counter.
// @Summary      Return to merchant (EPAY compat)
// @Description  Browser-facing success return hop for EPay orders. Paid EPay orders are redirected to the merchant return_url with signed legacy EPay query params. Orders that are not EPay or not yet paid are redirected back to the checkout counter.
// @Description  The signed query params reuse the stored request type. On this branch that means either alipay or a supported token.network selector; if the original request omitted type, type=alipay is returned for compatibility.
// @Description  This route also returns explicit business errors when the merchant return_url is missing, the order API key is unavailable, or EPay signature construction fails.
// @Tags         Payment
// @Produce      html
// @Param        trade_id path string true "Trade ID"
// @Success      302 "Redirect to merchant return_url or checkout counter"
// @Failure      400 {object} response.ApiResponse "Stable errno in status_code: 10008 order not found, 10044 invalid order redirect url, 10045 order api key unavailable, 10046 failed to build epay return signature"
// @Router       /pay/return/{trade_id} [get]
func (c *BaseCommController) ReturnToMerchant(ctx echo.Context) error {
	tradeID := ctx.Param("trade_id")
	redirect, err := service.ResolveEPayReturnRedirect(tradeID)
	if err != nil {
		return c.FailJson(ctx, err)
	}
	if redirect.IsMerchantRedirect {
		ctx.Response().Header().Set("Cache-Control", "no-store")
	}
	return ctx.Redirect(http.StatusFound, redirect.TargetURL)
}

// CheckStatus 支付状态检测
// @Summary      Check payment status
// @Description  Return the current order status by trade ID. Status: 1=waiting payment, 2=paid, 3=expired, 4=waiting token/network selection.
// @Tags         Payment
// @Produce      json
// @Param        trade_id path string true "Trade ID"
// @Success      200 {object} response.ApiResponse{data=response.CheckStatusResponse}
// @Failure      400 {object} response.ApiResponse "Order not found (status_code=10008) or other request error"
// @Router       /pay/check-status/{trade_id} [get]
func (c *BaseCommController) CheckStatus(ctx echo.Context) (err error) {
	tradeId := ctx.Param("trade_id")
	order, err := service.GetOrderInfoByTradeId(tradeId)
	if err != nil {
		return c.FailJson(ctx, err)
	}
	resp := response.CheckStatusResponse{
		TradeId: order.TradeId,
		Status:  order.Status,
	}
	return c.SucJson(ctx, resp)
}

// SubmitTxHash 手动提交交易 hash 补单
// @Summary      Submit transaction hash
// @Description  Submit an on-chain transaction hash from the cashier. The hash is verified against the order and, when valid, the same manual payment processing path used by admin mark-paid is executed. OkPay/provider orders are not supported.
// @Description  TON accepts canonical ton:<receive_raw>:<lt>:<hash>, lt:hash, or a unique recent hash-only reference for the order receive address.
// @Description  Aptos accepts a transaction hash.
// @Description  Aptos automatic scanning polls fullnode ledger-version transaction ranges with a runtime cursor.
// @Tags         Payment
// @Accept       json
// @Produce      json
// @Param        trade_id path string true "Trade ID"
// @Param        request body request.ManualPaymentRequest true "Transaction hash payload"
// @Success      200 {object} response.ApiResponse{data=response.ManualPaymentResponse}
// @Failure      400 {object} response.ApiResponse "Stable errno in status_code: 10008 order not found, 10009 invalid params, 10013 not waiting payment, 10038 verification failed, 10039 unsupported provider, 10007 hash already processed"
// @Router       /pay/submit-tx-hash/{trade_id} [post]
func (c *BaseCommController) SubmitTxHash(ctx echo.Context) (err error) {
	tradeId := ctx.Param("trade_id")
	req := new(request.ManualPaymentRequest)
	if err = ctx.Bind(req); err != nil {
		return c.FailJson(ctx, constant.ParamsMarshalErr)
	}
	req.BlockTransactionId = strings.TrimSpace(req.BlockTransactionId)
	if err = c.ValidateStruct(ctx, req); err != nil {
		return c.FailJson(ctx, err)
	}

	resp, err := service.SubmitCashierManualPayment(tradeId, req.BlockTransactionId)
	if err != nil {
		return c.FailJson(ctx, err)
	}
	return c.SucJson(ctx, resp)
}