package handler

import (
	"context"
	"database/sql"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
)

// Remove a specified VM from the inventory
func (h *Handler) VcCleanup(w http.ResponseWriter, r *http.Request) {
	ctx := context.Background()

	// Get the parameters
	vcUrl := r.URL.Query().Get("vc_url")
	if vcUrl != "" {
		h.Logger.Debug("Checking inventory table for vCenter", "url", vcUrl)
		_, err := h.Database.Queries().GetInventoryVcUrl(ctx, vcUrl)

		if err != nil {
			if errors.Is(err, sql.ErrNoRows) {
				h.Logger.Error("No VMs found for vcenter", "url", vcUrl)
				w.Header().Set("Content-Type", "application/json")
				w.WriteHeader(http.StatusBadRequest)
				json.NewEncoder(w).Encode(map[string]string{
					"status":  "ERROR",
					"message": fmt.Sprintf("No match to vcenter details specified. vc_url: '%s'", vcUrl),
				})
				return
			} else {
				h.Logger.Error("Error checking for vcenter to cleanup", "error", err, "url", vcUrl)
				w.Header().Set("Content-Type", "application/json")
				w.WriteHeader(http.StatusBadRequest)
				json.NewEncoder(w).Encode(map[string]string{
					"status":  "ERROR",
					"message": fmt.Sprintf("Error checking for vcenter to cleanup. error: '%s'", err),
				})
				return
			}
		} else {
			// delete the VMs
			err = h.Database.Queries().InventoryCleanupVcenter(ctx, vcUrl)
			if err != nil {
				h.Logger.Error("Error cleaning up VMs from Inventory table", "error", err, "url", vcUrl)
				w.Header().Set("Content-Type", "application/json")
				w.WriteHeader(http.StatusBadRequest)
				json.NewEncoder(w).Encode(map[string]string{
					"status":  "ERROR",
					"message": fmt.Sprintf("Error cleaning up VMs from Inventory table. error: '%s'", err),
				})
				return
			} else {
				// Successful cleanup
				h.Logger.Debug("VMs successfully removed from inventory for vcenter", "url", vcUrl)
				w.Header().Set("Content-Type", "application/json")
				w.WriteHeader(http.StatusOK)
				json.NewEncoder(w).Encode(map[string]string{
					"status":  "OK",
					"message": fmt.Sprintf("Removed VMs from Inventory table for vcenter '%s'", vcUrl),
				})
				return
			}
		}
	} else {
		h.Logger.Error("Parameters not correctly specified", "url", vcUrl)
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusBadRequest)
		json.NewEncoder(w).Encode(map[string]string{
			"status":  "ERROR",
			"message": fmt.Sprintf("Parameters not correctly specified. vc_url: '%s'", vcUrl),
		})
		return
	}
}