// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

package list

import (
	"encoding/json"
	"fmt"
	"strconv"

	"github.com/spf13/cobra"
	"go.probo.inc/probo/pkg/cli/api"
	"go.probo.inc/probo/pkg/cmd/cmdutil"
)

const listQuery = `
query($id: ID!, $first: Int, $after: CursorKey, $orderBy: SCIMEventOrder) {
  node(id: $id) {
    __typename
    ... on SCIMConfiguration {
      events(first: $first, after: $after, orderBy: $orderBy) {
        totalCount
        edges {
          node {
            id
            method
            path
            statusCode
            userName
            ipAddress
            createdAt
          }
        }
        pageInfo {
          hasNextPage
          endCursor
        }
      }
    }
  }
}
`

type scimEvent struct {
	ID         string `json:"id"`
	Method     string `json:"method"`
	Path       string `json:"path"`
	StatusCode int    `json:"statusCode"`
	UserName   string `json:"userName"`
	IPAddress  string `json:"ipAddress"`
	CreatedAt  string `json:"createdAt"`
}

func NewCmdList(f *cmdutil.Factory) *cobra.Command {
	var (
		flagLimit    int
		flagOrderDir string
		flagOutput   *string
	)

	cmd := &cobra.Command{
		Use:   "list <scim-configuration-id>",
		Short: "List SCIM events for a configuration",
		Example: `  # List recent SCIM events
  prb scim event list <scim-configuration-id>

  # List oldest first
  prb scim event list <scim-configuration-id> --order-direction ASC`,
		Aliases: []string{"ls"},
		Args:    cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := cmdutil.ValidateOutputFlag(flagOutput); err != nil {
				return err
			}

			cfg, err := f.Config()
			if err != nil {
				return err
			}

			host, hc, err := cfg.DefaultHost()
			if err != nil {
				return err
			}

			client := api.NewClient(
				host,
				hc.Token,
				"/api/connect/v1/graphql",
				cfg.HTTPTimeoutDuration(),
				cmdutil.TokenRefreshOption(cfg, host, hc),
			)

			variables := map[string]any{
				"id": args[0],
				"orderBy": map[string]any{
					"field":     "CREATED_AT",
					"direction": flagOrderDir,
				},
			}

			events, totalCount, err := api.Paginate(
				client,
				listQuery,
				variables,
				flagLimit,
				func(data json.RawMessage) (*api.Connection[scimEvent], error) {
					var resp struct {
						Node *struct {
							Typename string                    `json:"__typename"`
							Events   api.Connection[scimEvent] `json:"events"`
						} `json:"node"`
					}
					if err := json.Unmarshal(data, &resp); err != nil {
						return nil, err
					}

					if resp.Node == nil {
						return nil, fmt.Errorf("SCIM configuration %s not found", args[0])
					}

					if resp.Node.Typename != "SCIMConfiguration" {
						return nil, fmt.Errorf("expected SCIMConfiguration node, got %s", resp.Node.Typename)
					}

					return &resp.Node.Events, nil
				},
			)
			if err != nil {
				return err
			}

			if *flagOutput == cmdutil.OutputJSON {
				return cmdutil.PrintJSON(f.IOStreams.Out, events)
			}

			if len(events) == 0 {
				_, _ = fmt.Fprintln(f.IOStreams.Out, "No SCIM events found.")
				return nil
			}

			rows := make([][]string, 0, len(events))
			for _, e := range events {
				rows = append(rows, []string{
					e.ID,
					e.Method,
					e.Path,
					strconv.Itoa(e.StatusCode),
					e.UserName,
					cmdutil.FormatTime(e.CreatedAt),
				})
			}

			t := cmdutil.NewTable("ID", "METHOD", "PATH", "STATUS", "USER", "CREATED").Rows(rows...)

			_, _ = fmt.Fprintln(f.IOStreams.Out, t)

			if totalCount > len(events) {
				_, _ = fmt.Fprintf(
					f.IOStreams.ErrOut,
					"\nShowing %d of %d events\n",
					len(events),
					totalCount,
				)
			}

			return nil
		},
	}

	cmd.Flags().IntVarP(&flagLimit, "limit", "L", 30, "Maximum number of events to list")
	cmd.Flags().StringVar(&flagOrderDir, "order-direction", "DESC", "Sort direction (ASC, DESC)")
	flagOutput = cmdutil.AddOutputFlag(cmd)

	return cmd
}