package cmd

import (
	"context"
	"errors"
	"fmt"
	"strings"

	"github.com/Pingu-Studio/MaidnCLI/internal/bootstrap"
	"github.com/Pingu-Studio/MaidnCLI/internal/cloudflare"
	"github.com/Pingu-Studio/MaidnCLI/internal/config"
	"github.com/spf13/cobra"
)

var cloudflareTunnelConfigPath string
var cloudflareTunnelHostname string
var cloudflareTunnelService string
var cloudflareTunnelZoneID string

var loadCloudflareTunnelConfig = config.Load
var readCloudflareTunnelSecrets = bootstrap.ReadOperationalSecrets
var writeCloudflareTunnelSecrets = bootstrap.WriteOperationalSecrets
var newCloudflareRouteClient = func(token string) cloudflare.API { return cloudflare.NewClient(token) }
var initializeCloudflareTunnelOpenBao = bootstrap.InitializeOpenBao

var cloudflareTunnelCmd = &cobra.Command{
	Use:   "cloudflare-tunnel",
	Short: "Manage CLI-created Cloudflare Tunnel routes.",
}

var cloudflareTunnelRouteCmd = &cobra.Command{Use: "route"}

var cloudflareTunnelRouteAddCmd = &cobra.Command{
	Use:   "add",
	Short: "Add a proxied public route to the managed tunnel.",
	RunE: func(cmd *cobra.Command, _ []string) error {
		return runCloudflareTunnelRoute(cmd, true)
	},
}

var cloudflareTunnelRouteRemoveCmd = &cobra.Command{
	Use:   "remove",
	Short: "Remove a proxied public route from the managed tunnel.",
	RunE: func(cmd *cobra.Command, _ []string) error {
		return runCloudflareTunnelRoute(cmd, false)
	},
}

func init() {
	rootCmd.AddCommand(cloudflareTunnelCmd)
	cloudflareTunnelCmd.AddCommand(cloudflareTunnelRouteCmd)
	cloudflareTunnelRouteCmd.AddCommand(cloudflareTunnelRouteAddCmd, cloudflareTunnelRouteRemoveCmd)
	cloudflareTunnelCmd.PersistentFlags().StringVar(&cloudflareTunnelConfigPath, "config", "", "Path to bootstrap config YAML")
	for _, command := range []*cobra.Command{cloudflareTunnelRouteAddCmd, cloudflareTunnelRouteRemoveCmd} {
		command.Flags().StringVar(&cloudflareTunnelHostname, "hostname", "", "Public DNS hostname")
		command.Flags().StringVar(&cloudflareTunnelService, "service", "", "Upstream http or https service URL")
		command.Flags().StringVar(&cloudflareTunnelZoneID, "zone-id", "", "Cloudflare zone ID")
		_ = command.MarkFlagRequired("hostname")
		_ = command.MarkFlagRequired("service")
		_ = command.MarkFlagRequired("zone-id")
	}
}

func runCloudflareTunnelRoute(cmd *cobra.Command, add bool) error {
	if cloudflareTunnelConfigPath == "" {
		return errors.New("--config is required")
	}
	if strings.TrimSpace(cloudflareTunnelZoneID) == "" {
		return errors.New("--zone-id is required")
	}
	route, err := cloudflare.NewRoute(cloudflareTunnelHostname, cloudflareTunnelService)
	if err != nil {
		return err
	}
	cfg, err := loadCloudflareTunnelConfig(cloudflareTunnelConfigPath)
	if err != nil {
		return err
	}
	secrets, err := readCloudflareTunnelSecrets(cfg.SOPS.OperationalSecretsPath, cfg.SOPS.AgeKeyPath)
	if err != nil {
		return fmt.Errorf("read encrypted Cloudflare operational state: %w", err)
	}
	token := strings.TrimSpace(secrets["platform/cloudflare"]["api-token"])
	if token == "" {
		return errors.New("encrypted operational secrets requires platform/cloudflare.api-token")
	}
	stored, present, err := cloudflare.ParseStoredTunnel(secrets["platform/cloudflare-tunnel"])
	if err != nil {
		return err
	}
	if !present {
		return errors.New("Cloudflare tunnel credentials and config are not generated; run bootstrap reconcile first")
	}
	ctx := context.Background()
	if cmd != nil && cmd.Context() != nil {
		ctx = cmd.Context()
	}
	client := newCloudflareRouteClient(token)
	if add {
		changed, err := stored.Config.AddRoute(route)
		if err != nil {
			return err
		}
		if err := client.EnsureCNAME(ctx, strings.TrimSpace(cloudflareTunnelZoneID), route.Hostname, stored.Credentials.TunnelID); err != nil {
			return fmt.Errorf("ensure Cloudflare route DNS record: %w", err)
		}
		if !changed {
			return nil
		}
		values, err := stored.Values()
		if err != nil {
			return err
		}
		secrets["platform/cloudflare-tunnel"] = values
		if err := writeCloudflareTunnelSecrets(cfg.SOPS.OperationalSecretsPath, cfg.SOPS.AgeKeyPath, secrets); err != nil {
			return errors.New("save encrypted Cloudflare tunnel route")
		}
		if err := initializeCloudflareTunnelOpenBao(cfg); err != nil {
			return errors.New("Cloudflare tunnel route was saved but OpenBao could not be seeded; rerun bootstrap --config <config> --initialize-openbao")
		}
		return nil
	}
	changed, err := stored.Config.RemoveRoute(route)
	if err != nil {
		return err
	}
	if changed {
		values, err := stored.Values()
		if err != nil {
			return err
		}
		secrets["platform/cloudflare-tunnel"] = values
		if err := writeCloudflareTunnelSecrets(cfg.SOPS.OperationalSecretsPath, cfg.SOPS.AgeKeyPath, secrets); err != nil {
			return errors.New("save encrypted Cloudflare tunnel route")
		}
		if err := initializeCloudflareTunnelOpenBao(cfg); err != nil {
			return errors.New("Cloudflare tunnel route was saved but OpenBao could not be seeded; rerun bootstrap --config <config> --initialize-openbao")
		}
	}
	if err := client.DeleteCNAME(ctx, strings.TrimSpace(cloudflareTunnelZoneID), route.Hostname, stored.Credentials.TunnelID); err != nil {
		return fmt.Errorf("delete Cloudflare route DNS record: %w", err)
	}
	return nil
}