package handlers

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

	"aggios-app/backend/internal/domain"
	"aggios-app/backend/internal/service"
)

// TenantHandler handles tenant/agency listing endpoints
type TenantHandler struct {
	tenantService *service.TenantService
}

// NewTenantHandler creates a new tenant handler
func NewTenantHandler(tenantService *service.TenantService) *TenantHandler {
	return &TenantHandler{
		tenantService: tenantService,
	}
}

// ListAll lists all agencies/tenants (SUPERADMIN only)
func (h *TenantHandler) ListAll(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	tenants, err := h.tenantService.ListAll()
	if err != nil {
		http.Error(w, "Internal server error", http.StatusInternalServerError)
		return
	}

	if tenants == nil {
		tenants = []*domain.Tenant{}
	}

	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	json.NewEncoder(w).Encode(tenants)
}