// v1handlers.go：HTTP 兜底面 /v1/search /v1/read（与 MCP tools/call 共用同一内核）。
package gateway

import (
	"net/http"

	"onesvm.com/onesvm/browser-server/internal/contract"
)

// handleV1Search POST /v1/search。
func (s *Server) handleV1Search(w http.ResponseWriter, r *http.Request, a *consumerAuth) {
	var in contract.SearchInput
	if err := jsonDecode(r, &in); err != nil {
		s.writeErr(w, r, contract.CodeUnavailable, "请求体非法 JSON: "+err.Error(), http.StatusBadRequest, "", nil)
		return
	}
	s.runAndRespond(w, r, a, runCtx{Intent: "search", Search: &in})
}

// handleV1Read POST /v1/read。
func (s *Server) handleV1Read(w http.ResponseWriter, r *http.Request, a *consumerAuth) {
	var in contract.ReadInput
	if err := jsonDecode(r, &in); err != nil {
		s.writeErr(w, r, contract.CodeUnavailable, "请求体非法 JSON: "+err.Error(), http.StatusBadRequest, "", nil)
		return
	}
	s.runAndRespond(w, r, a, runCtx{Intent: "read", Read: &in})
}

// runAndRespond 共用响应路径：管线 → 信封/错误输出。
func (s *Server) runAndRespond(w http.ResponseWriter, r *http.Request, a *consumerAuth, rc runCtx) {
	rc.Auth = a
	rc.W = w
	rc.R = r
	res := s.pipeline(rc)
	switch {
	case res.HTTPStatus != http.StatusOK && res.Body == nil:
		// 前置错误（401/402/403/429/503）
		w.Header().Set("Content-Type", "application/json")
		if res.RetryAfterS != nil {
			setRetryAfter(w, *res.RetryAfterS)
		}
		for k, v := range res.Headers {
			w.Header().Set(k, v)
		}
		w.WriteHeader(res.HTTPStatus)
		_, _ = w.Write(res.Body2)
	case res.Body != nil:
		// 完整信封（成功或 200 信封错误）
		for k, v := range res.Headers {
			w.Header().Set(k, v)
		}
		s.writeEnvelope(w, r, a, res.Body)
	default:
		s.writeErr(w, r, contract.CodeUpstream, "空管线结果", http.StatusInternalServerError, "", nil)
	}
}

// setRetryAfter Retry-After 头。
func setRetryAfter(w http.ResponseWriter, secs int) {
	w.Header().Set("Retry-After", itoa(secs))
}