package queues

import (
	"encoding/json"
	"fmt"
	"strings"
	"xcecli/common/request"
	"xcecli/config"
	"xcecli/models"

	"github.com/spf13/cobra"
)

// QueueController queue controller
type QueueController struct {
	configManager *config.ConfigManager
	action        string
	queueNames    []string
	comment       string
	allQueues     bool
}

// NewQueueController create queue controller
func NewQueueController(configManager *config.ConfigManager, action string) *QueueController {
	return &QueueController{
		configManager: configManager,
		action:        action,
		queueNames:    []string{},
	}
}

// Run execute queue control
func (c *QueueController) RunQueuesControl() error {
	// get server info and verify authentication
	serverInfo, _ := c.configManager.GetServerInfo()
	// create API client
	apiClient := request.NewAPIClient(serverInfo.URL)

	// handle all queues case
	if c.allQueues {
		c.queueNames = []string{"all"}
	}

	// if no queue names are specified, return an error
	if len(c.queueNames) == 0 {
		return fmt.Errorf("must specify queue names or use --all option")
	}

	// create request
	req := models.QueueControlRequest{
		ControlAction: c.action,
		QueueName:     c.queueNames,
		Comment:       c.comment,
	}

	// convert request to JSON bytes
	reqData, err := json.Marshal(req)
	if err != nil {
		errMsg := request.ExtractErrorMessage(err)
		return fmt.Errorf("failed to encode request data: [%s]", errMsg)
	}

	// send request
	var resp models.QueueControlResponse
	err = apiClient.PostRequestToAPIServer(
		serverInfo.Token,
		"/xce/v1/queues/control",
		reqData,
		&resp,
	)

	if err != nil {
		return err
	}

	if len(c.queueNames) == 1 && c.queueNames[0] == "all" {
		for _, data := range resp.Data.Accepted {
			fmt.Printf("queue <%s> is being <%s>\n", data.QueueName, c.action)
		}
		for _, queue := range resp.Data.Failed {
			fmt.Printf("queue <%s> cannot be <%s> for reason <%s>\n", queue.QueueName, c.action, queue.Msg)
		}
	} else {
		for _, data := range resp.Data.Accepted {
			fmt.Printf("queue <%s> is being <%s>\n", data.QueueName, c.action)
		}
		for _, queue := range resp.Data.Failed {
			fmt.Printf("queue <%s> cannot be <%s> for reason <%s>\n", queue.QueueName, c.action, queue.Msg)
		}
	}
	return nil
}

// Parse parse command line arguments
func (c *QueueController) ParseCmdArgs(cmd *cobra.Command, args []string) error {
	// handle queue name parameters
	if len(args) > 0 {
		// Split comma-separated queue names
		for _, arg := range args {
			queues := strings.Split(arg, ",")
			c.queueNames = append(c.queueNames, queues...)
		}
	}

	return nil
}

// NewOpenQueuesCmd create open queues command
func NewOpenQueuesCmd(configManager *config.ConfigManager) *cobra.Command {
	controller := NewQueueController(configManager, "open")

	cmd := &cobra.Command{
		Use:   "open",
		Short: "Open queues",
		Long: `Open queues by queue name.
Opens queues to accept new job submissions.

Examples:
  xce queues open normal priority   # open specific queues
  xce queues open --all             # open all queues`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := controller.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := controller.RunQueuesControl(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// add control options
	flags := cmd.Flags()
	flags.BoolVarP(&controller.allQueues, "all", "a", false, "apply to all queues")
	flags.StringVarP(&controller.comment, "comment", "c", "", "add comment for this operation")

	return cmd
}

// NewCloseQueuesCmd create close queues command
func NewCloseQueuesCmd(configManager *config.ConfigManager) *cobra.Command {
	controller := NewQueueController(configManager, "close")

	cmd := &cobra.Command{
		Use:   "close",
		Short: "Close queues",
		Long: `Close queues by queue name.
Closes queues to prevent new job submissions.

Examples:
  xce queues close normal priority  # close specific queues
  xce queues close --all            # close all queues`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := controller.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := controller.RunQueuesControl(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// add control options
	flags := cmd.Flags()
	flags.BoolVarP(&controller.allQueues, "all", "a", false, "apply to all queues")
	flags.StringVarP(&controller.comment, "comment", "c", "", "add comment for this operation")

	return cmd
}

// NewActiveQueuesCmd create active queues command
func NewActiveQueuesCmd(configManager *config.ConfigManager) *cobra.Command {
	controller := NewQueueController(configManager, "active")

	cmd := &cobra.Command{
		Use:   "active",
		Short: "Active queues",
		Long: `Active queues by queue name.

Examples:
  xce queues active   # queues_name status close/d`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := controller.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := controller.RunQueuesControl(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// add control options
	flags := cmd.Flags()
	flags.BoolVarP(&controller.allQueues, "all", "a", false, "apply to all queues")
	flags.StringVarP(&controller.comment, "comment", "c", "", "add comment for this operation")

	return cmd
}

func NewDeactiveQueuesCmd(configManager *config.ConfigManager) *cobra.Command {
	controller := NewQueueController(configManager, "deactive")

	cmd := &cobra.Command{
		Use:   "deactive",
		Short: "Deactive queues",
		Long: `Deactive queues by queue name.

Examples:
  xce queues deactive   # queues_name status close/d`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := controller.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := controller.RunQueuesControl(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// add control options
	flags := cmd.Flags()
	flags.BoolVarP(&controller.allQueues, "all", "a", false, "apply to all queues")
	flags.StringVarP(&controller.comment, "comment", "c", "", "add comment for this operation")

	return cmd
}