package httputil

import (
	"encoding/json"
	"errors"
	"log/slog"
	"net/http"
	"server/internal/model/common"
	"server/internal/pkg/errs"
	validatorI18 "server/internal/pkg/validator"
	"strings"

	"github.com/go-playground/validator/v10"
)

func respondWithJSON(w http.ResponseWriter, code int, data any) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.WriteHeader(code)
	if err := json.NewEncoder(w).Encode(data); err != nil {
		slog.Error("respondWithJSON: failed to encode response", "error", err)
	}
}

func Ok(w http.ResponseWriter, data ...any) {
	resp := common.Response{
		Message: "ok",
	}

	if len(data) > 0 && data[0] != nil {
		resp.Data = data[0]
	}

	respondWithJSON(w, http.StatusOK, resp)
}

func OkWithPage(w http.ResponseWriter, pageResp *common.PageResponse) {
	pageResp.Message = "ok"
	respondWithJSON(w, http.StatusOK, pageResp)
}

// Fail 响应失败
func Fail(w http.ResponseWriter, err error) {
	var msg string
	// 默认code 500
	httpStatusCode := http.StatusInternalServerError

	var validationErrs validator.ValidationErrors
	var appErr *errs.AppError
	if errors.As(err, &validationErrs) {
		httpStatusCode = http.StatusBadRequest
		msgs := validatorI18.Translate(err)
		msg = strings.Join(msgs, "; ")
	} else if errors.As(err, &appErr) {
		httpStatusCode = appErr.HTTPCode
		msg = appErr.Msg
	} else {
		msg = err.Error()
	}

	resp := common.Response{
		Message: msg,
	}

	respondWithJSON(w, httpStatusCode, resp)
}