package server

import (
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"strings"

	"scm.bstein.dev/bstein/soteria/internal/api"
)

func (s *Server) handlePolicies(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:
		writeJSON(w, http.StatusOK, api.BackupPolicyListResponse{Policies: s.listPolicies()})
	case http.MethodPost:
		r.Body = http.MaxBytesReader(w, r.Body, 1<<20)
		var req api.BackupPolicyUpsertRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			writeError(w, http.StatusBadRequest, fmt.Sprintf("invalid JSON: %v", err))
			return
		}
		policy, err := s.upsertPolicy(r.Context(), req)
		if err != nil {
			writeError(w, http.StatusBadRequest, err.Error())
			return
		}
		writeJSON(w, http.StatusOK, policy)
	default:
		writeError(w, http.StatusMethodNotAllowed, "method not allowed")
	}
}

func (s *Server) handlePolicyByID(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodDelete {
		writeError(w, http.StatusMethodNotAllowed, "method not allowed")
		return
	}
	encodedID := strings.TrimPrefix(r.URL.Path, "/v1/policies/")
	if encodedID == "" {
		writeError(w, http.StatusBadRequest, "policy id is required")
		return
	}
	id, err := url.PathUnescape(encodedID)
	if err != nil {
		writeError(w, http.StatusBadRequest, "invalid policy id")
		return
	}
	removed, err := s.deletePolicy(r.Context(), id)
	if err != nil {
		writeError(w, http.StatusBadGateway, err.Error())
		return
	}
	if !removed {
		writeError(w, http.StatusNotFound, "policy not found")
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"deleted": id})
}