// Package server wires the HTTP surface for tenant-registry.
//
// All routes are registered in NewRouter; per-concern handlers live in
// peer files (tenants.go, catalog.go, apikeys.go, audit.go).
package server

import (
	"log/slog"
	"net/http"

	"gitea.meghsakha.com/platform/tenant-registry/internal/config"
	"gitea.meghsakha.com/platform/tenant-registry/internal/store"
)

// Server bundles the dependencies every handler needs.
type Server struct {
	Cfg   *config.Config
	Log   *slog.Logger
	Store store.Store
}

// NewRouter builds the http.Handler with logging middleware applied.
func NewRouter(s *Server) http.Handler {
	mux := http.NewServeMux()

	// health + status
	mux.HandleFunc("GET /healthz", s.healthz)
	mux.HandleFunc("GET /readyz", s.readyz)

	// tenants
	mux.HandleFunc("POST /v1/tenants", s.createTenant)
	mux.HandleFunc("GET /v1/tenants/{id}", s.getTenant)
	mux.HandleFunc("GET /v1/tenants/by-slug/{slug}", s.getTenantBySlug)
	mux.HandleFunc("POST /v1/tenants/{id}/activate", s.activateTenant)
	mux.HandleFunc("POST /v1/tenants/{id}/cancel", s.cancelTenant)

	// entitlements — top-level path so it doesn't conflict with
	// /v1/tenants/by-slug/{slug} (Go 1.22 ServeMux can't disambiguate
	// /v1/tenants/{id}/products vs /v1/tenants/by-slug/{slug=products}).
	mux.HandleFunc("GET /v1/entitlements", s.listTenantProducts)

	// catalog
	mux.HandleFunc("GET /v1/catalog", s.getCatalog)
	mux.HandleFunc("POST /v1/catalog/request", s.catalogRequest)
	mux.HandleFunc("POST /v1/catalog/trial-request", s.catalogTrialRequest)

	// api keys — same disambiguation: list lives at /v1/api-keys?tenant_id=X
	// instead of /v1/tenants/{id}/api-keys.
	mux.HandleFunc("POST /v1/api-keys", s.createAPIKey)
	mux.HandleFunc("GET /v1/api-keys", s.listAPIKeys)
	mux.HandleFunc("DELETE /v1/api-keys/{id}", s.revokeAPIKey)
	mux.HandleFunc("POST /v1/internal/api-keys/verify", s.verifyAPIKey)

	// audit
	mux.HandleFunc("POST /v1/audit", s.appendAudit)
	mux.HandleFunc("GET /v1/audit", s.listAudit)

	return logRequest(s.Log)(mux)
}

func (s *Server) healthz(w http.ResponseWriter, _ *http.Request) {
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}

func (s *Server) readyz(w http.ResponseWriter, r *http.Request) {
	if err := s.Store.Ping(r.Context()); err != nil {
		writeError(w, http.StatusServiceUnavailable, "store_unavailable", err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"status": "ready"})
}