package rest

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

	"github.com/explorer/backend/auth"
)

// handleMembershipTiers returns the canonical set of institutional tiers
// with their labels and default explorer access tracks.
// GET /api/v1/membership/tiers
func (s *Server) handleMembershipTiers(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeMethodNotAllowed(w)
		return
	}

	tiers := auth.ListTiers()
	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(map[string]interface{}{
		"tiers": tiers,
	})
}

// handleMembershipMembers returns all active institutional members.
// GET /api/v1/membership/members
func (s *Server) handleMembershipMembers(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeMethodNotAllowed(w)
		return
	}

	if !s.requireDB(w) {
		return
	}

	store := auth.NewMembershipStore(s.db)
	members, err := store.ListMembers(r.Context())
	if err != nil {
		writeInternalError(w, err.Error())
		return
	}
	if members == nil {
		members = []auth.InstitutionalMember{}
	}

	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(map[string]interface{}{
		"members": members,
		"total":   len(members),
	})
}

// handleMembershipMemberDetail returns a single member by slug.
// GET /api/v1/membership/members/{slug}
func (s *Server) handleMembershipMemberDetail(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeMethodNotAllowed(w)
		return
	}

	if !s.requireDB(w) {
		return
	}

	slug := strings.TrimPrefix(r.URL.Path, "/api/v1/membership/members/")
	if slug == "" {
		writeError(w, http.StatusBadRequest, "MISSING_SLUG", "Member slug is required")
		return
	}

	store := auth.NewMembershipStore(s.db)
	member, err := store.GetMemberBySlug(r.Context(), slug)
	if err != nil {
		writeInternalError(w, err.Error())
		return
	}
	if member == nil {
		writeNotFound(w, "Member")
		return
	}

	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(map[string]interface{}{
		"member": member,
	})
}