package auth

import (
	"nixcn-cms/internal/exception"
	"nixcn-cms/service/service_auth"
	"nixcn-cms/utils"

	"github.com/gin-gonic/gin"
)

// Redirect handles the post-verification callback and redirects the user to the target application.
//	@Summary		Handle Auth Callback and Redirect
//	@Description	Verifies the temporary email code, ensures the user exists (or creates one), validates the client's redirect URI, and finally performs a 302 redirect with a new authorization code.
//	@Tags			Authentication
//	@Accept			x-www-form-urlencoded
//	@Produce		json
//	@Produce		html
//	@Param			client_id		query		string						true	"Client Identifier"
//	@Param			redirect_uri	query		string						true	"Target Redirect URI"
//	@Param			code			query		string						true	"Temporary Verification Code"
//	@Param			state			query		string						false	"Opaque state used to maintain state between the request and callback"
//	@Success		302				{string}	string						"Redirect to the provided RedirectUri with a new code"
//	@Failure		400				{object}	utils.RespStatus{data=nil}	"Invalid Input / Client Not Found / URI Mismatch"
//	@Failure		403				{object}	utils.RespStatus{data=nil}	"Invalid or Expired Verification Code"
//	@Failure		500				{object}	utils.RespStatus{data=nil}	"Internal Server Error"
//	@Router			/auth/redirect [get]
func (self *AuthHandler) Redirect(c *gin.Context) {
	data := &service_auth.RedirectData{
		ClientId:    c.Query("client_id"),
		RedirectUri: c.Query("redirect_uri"),
		State:       c.Query("state"),
		Code:        c.Query("code"),
	}

	if data.ClientId == "" || data.RedirectUri == "" || data.Code == "" {
		errorCode := new(exception.Builder).
			SetStatus(exception.StatusUser).
			SetService(exception.ServiceAuth).
			SetEndpoint(exception.EndpointAuthServiceRedirect).
			SetType(exception.TypeCommon).
			SetOriginal(exception.CommonErrorInvalidInput).
			SetError(nil).
			Throw(c).
			String()
		utils.HttpResponse(c, 400, errorCode)
		return
	}

	result := self.svc.Redirect(&service_auth.RedirectPayload{
		Context: c,
		Data:    data,
	})

	if result.Common.Exception.Original != exception.CommonSuccess {
		utils.HttpResponse(c, result.Common.HttpCode, result.Common.Exception.String())
		return
	}

	c.Redirect(302, result.Data)
}