package monitoring

import (
	"fmt"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"time"

	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

// OperationsCLI provides command-line interface for operations management
type OperationsCLI struct {
	manager    *OperationsManager
	configPath string
	logger     *logrus.Logger
}

// NewOperationsCLI creates a new operations CLI
func NewOperationsCLI(configPath string, logger *logrus.Logger) *OperationsCLI {
	return &OperationsCLI{
		configPath: configPath,
		logger:     logger,
	}
}

// CreateRootCommand creates the root operations command
func (cli *OperationsCLI) CreateRootCommand() *cobra.Command {
	rootCmd := &cobra.Command{
		Use:   "operations",
		Short: "Debian Forge Operations Management",
		Long:  "Manage backup, recovery, and testing operations for Debian Forge",
		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
			return cli.initializeManager()
		},
	}

	// Add subcommands
	rootCmd.AddCommand(cli.createBackupCommand())
	rootCmd.AddCommand(cli.createRecoveryCommand())
	rootCmd.AddCommand(cli.createTestingCommand())
	rootCmd.AddCommand(cli.createConfigCommand())
	rootCmd.AddCommand(cli.createStatusCommand())

	return rootCmd
}

// initializeManager initializes the operations manager
func (cli *OperationsCLI) initializeManager() error {
	// Load configuration
	config, err := LoadOperationsConfig(cli.configPath)
	if err != nil {
		return fmt.Errorf("failed to load configuration: %w", err)
	}

	// Validate configuration
	configManager := &OperationsConfigManager{configPath: cli.configPath, config: config}
	if err := configManager.ValidateConfig(); err != nil {
		return fmt.Errorf("configuration validation failed: %w", err)
	}

	// Create operations manager
	cli.manager = NewOperationsManager(config, cli.logger)
	return nil
}

// createBackupCommand creates the backup command
func (cli *OperationsCLI) createBackupCommand() *cobra.Command {
	backupCmd := &cobra.Command{
		Use:   "backup",
		Short: "Manage backup operations",
		Long:  "Create, list, and manage backup operations",
	}

	// Create backup subcommand
	createCmd := &cobra.Command{
		Use:   "create [strategy]",
		Short: "Create a new backup",
		Long:  "Create a new backup using the specified strategy",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.createBackup(args[0])
		},
	}

	// List backups subcommand
	listCmd := &cobra.Command{
		Use:   "list",
		Short: "List available backups",
		Long:  "List all available backup strategies and recent backups",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.listBackups()
		},
	}

	// Schedule backup subcommand
	scheduleCmd := &cobra.Command{
		Use:   "schedule [schedule]",
		Short: "Schedule a backup",
		Long:  "Schedule a backup using the specified schedule",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.scheduleBackup(args[0])
		},
	}

	backupCmd.AddCommand(createCmd, listCmd, scheduleCmd)
	return backupCmd
}

// createRecoveryCommand creates the recovery command
func (cli *OperationsCLI) createRecoveryCommand() *cobra.Command {
	recoveryCmd := &cobra.Command{
		Use:   "recovery",
		Short: "Manage recovery operations",
		Long:  "Execute recovery plans and manage recovery procedures",
	}

	// Execute recovery subcommand
	executeCmd := &cobra.Command{
		Use:   "execute [plan] [backup]",
		Short: "Execute a recovery plan",
		Long:  "Execute a recovery plan using the specified backup",
		Args:  cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.executeRecovery(args[0], args[1])
		},
	}

	// List recovery plans subcommand
	listCmd := &cobra.Command{
		Use:   "list",
		Short: "List recovery plans",
		Long:  "List all available recovery plans",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.listRecoveryPlans()
		},
	}

	// Show recovery procedure subcommand
	showCmd := &cobra.Command{
		Use:   "show [procedure]",
		Short: "Show recovery procedure details",
		Long:  "Show detailed information about a recovery procedure",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.showRecoveryProcedure(args[0])
		},
	}

	recoveryCmd.AddCommand(executeCmd, listCmd, showCmd)
	return recoveryCmd
}

// createTestingCommand creates the testing command
func (cli *OperationsCLI) createTestingCommand() *cobra.Command {
	testingCmd := &cobra.Command{
		Use:   "testing",
		Short: "Manage recovery testing",
		Long:  "Run and manage recovery testing scenarios",
	}

	// Run test subcommand
	runCmd := &cobra.Command{
		Use:   "run [scenario]",
		Short: "Run a test scenario",
		Long:  "Run a recovery test scenario",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.runTest(args[0])
		},
	}

	// List test scenarios subcommand
	listCmd := &cobra.Command{
		Use:   "list",
		Short: "List test scenarios",
		Long:  "List all available test scenarios",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.listTestScenarios()
		},
	}

	// Show test results subcommand
	resultsCmd := &cobra.Command{
		Use:   "results [test-id]",
		Short: "Show test results",
		Long:  "Show results for a specific test",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.showTestResults(args[0])
		},
	}

	testingCmd.AddCommand(runCmd, listCmd, resultsCmd)
	return testingCmd
}

// createConfigCommand creates the configuration command
func (cli *OperationsCLI) createConfigCommand() *cobra.Command {
	configCmd := &cobra.Command{
		Use:   "config",
		Short: "Manage operations configuration",
		Long:  "View and modify operations configuration",
	}

	// Show configuration subcommand
	showCmd := &cobra.Command{
		Use:   "show",
		Short: "Show current configuration",
		Long:  "Show current operations configuration",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.showConfig()
		},
	}

	// Update configuration subcommand
	updateCmd := &cobra.Command{
		Use:   "update [key] [value]",
		Short: "Update configuration",
		Long:  "Update a configuration value",
		Args:  cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.updateConfig(args[0], args[1])
		},
	}

	// Validate configuration subcommand
	validateCmd := &cobra.Command{
		Use:   "validate",
		Short: "Validate configuration",
		Long:  "Validate current configuration",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.validateConfig()
		},
	}

	configCmd.AddCommand(showCmd, updateCmd, validateCmd)
	return configCmd
}

// createStatusCommand creates the status command
func (cli *OperationsCLI) createStatusCommand() *cobra.Command {
	statusCmd := &cobra.Command{
		Use:   "status",
		Short: "Show operations status",
		Long:  "Show current status of operations systems",
		RunE: func(cmd *cobra.Command, args []string) error {
			return cli.showStatus()
		},
	}

	return statusCmd
}

// Backup operations
func (cli *OperationsCLI) createBackup(strategyID string) error {
	cli.logger.Infof("Creating backup using strategy: %s", strategyID)
	
	job, err := cli.manager.backup.CreateBackup(strategyID)
	if err != nil {
		return fmt.Errorf("backup creation failed: %w", err)
	}

	fmt.Printf("Backup created successfully:\n")
	fmt.Printf("  ID: %s\n", job.ID)
	fmt.Printf("  Strategy: %s\n", job.StrategyID)
	fmt.Printf("  Status: %s\n", job.Status)
	fmt.Printf("  Size: %d bytes\n", job.Size)
	fmt.Printf("  Duration: %v\n", job.Duration)
	fmt.Printf("  Path: %s\n", job.Path)
	if job.Checksum != "" {
		fmt.Printf("  Checksum: %s\n", job.Checksum)
	}

	return nil
}

func (cli *OperationsCLI) listBackups() error {
	fmt.Printf("Available Backup Strategies:\n")
	fmt.Printf("============================\n")
	
	for id, strategy := range cli.manager.backup.strategies {
		fmt.Printf("  %s:\n", id)
		fmt.Printf("    Name: %s\n", strategy.Name)
		fmt.Printf("    Description: %s\n", strategy.Description)
		fmt.Printf("    Type: %s\n", strategy.Type)
		fmt.Printf("    Enabled: %t\n", strategy.Enabled)
		fmt.Printf("    Compression: %t\n", strategy.Compression)
		fmt.Printf("    Encryption: %t\n", strategy.Encryption)
		fmt.Printf("    Paths: %v\n", strategy.Paths)
		fmt.Printf("    Exclude: %v\n", strategy.Exclude)
		fmt.Printf("\n")
	}

	fmt.Printf("Backup Schedules:\n")
	fmt.Printf("=================\n")
	
	for id, schedule := range cli.manager.backup.schedules {
		fmt.Printf("  %s:\n", id)
		fmt.Printf("    Name: %s\n", schedule.Name)
		fmt.Printf("    Description: %s\n", schedule.Description)
		fmt.Printf("    Type: %s\n", schedule.Type)
		fmt.Printf("    Interval: %v\n", schedule.Interval)
		fmt.Printf("    Enabled: %t\n", schedule.Enabled)
		fmt.Printf("    Next Run: %v\n", schedule.NextRun)
		fmt.Printf("\n")
	}

	return nil
}

func (cli *OperationsCLI) scheduleBackup(scheduleID string) error {
	schedule, exists := cli.manager.backup.schedules[scheduleID]
	if !exists {
		return fmt.Errorf("backup schedule not found: %s", scheduleID)
	}

	if !schedule.Enabled {
		return fmt.Errorf("backup schedule is disabled: %s", scheduleID)
	}

	fmt.Printf("Scheduling backup for: %s\n", schedule.Name)
	fmt.Printf("  Type: %s\n", schedule.Type)
	fmt.Printf("  Interval: %v\n", schedule.Interval)
	fmt.Printf("  Next Run: %v\n", schedule.NextRun)

	// In production, this would actually schedule the backup
	cli.logger.Infof("Backup scheduled for: %s", scheduleID)
	return nil
}

// Recovery operations
func (cli *OperationsCLI) executeRecovery(planID string, backupID string) error {
	cli.logger.Infof("Executing recovery plan: %s with backup: %s", planID, backupID)
	
	if err := cli.manager.recovery.ExecuteRecovery(planID, backupID); err != nil {
		return fmt.Errorf("recovery execution failed: %w", err)
	}

	fmt.Printf("Recovery plan executed successfully: %s\n", planID)
	return nil
}

func (cli *OperationsCLI) listRecoveryPlans() error {
	fmt.Printf("Available Recovery Plans:\n")
	fmt.Printf("=========================\n")
	
	for id, plan := range cli.manager.recovery.plans {
		fmt.Printf("  %s:\n", id)
		fmt.Printf("    Name: %s\n", plan.Name)
		fmt.Printf("    Description: %s\n", plan.Description)
		fmt.Printf("    Priority: %s\n", plan.Priority)
		fmt.Printf("    RTO: %v\n", plan.RTO)
		fmt.Printf("    RPO: %v\n", plan.RPO)
		fmt.Printf("    Enabled: %t\n", plan.Enabled)
		fmt.Printf("    Procedures: %v\n", plan.Procedures)
		fmt.Printf("\n")
	}

	return nil
}

func (cli *OperationsCLI) showRecoveryProcedure(procedureID string) error {
	procedure, exists := cli.manager.recovery.procedures[procedureID]
	if !exists {
		return fmt.Errorf("recovery procedure not found: %s", procedureID)
	}

	fmt.Printf("Recovery Procedure: %s\n", procedure.Name)
	fmt.Printf("=====================\n")
	fmt.Printf("  ID: %s\n", procedure.ID)
	fmt.Printf("  Description: %s\n", procedure.Description)
	fmt.Printf("  Type: %s\n", procedure.Type)
	fmt.Printf("  Risk Level: %s\n", procedure.RiskLevel)
	fmt.Printf("  Estimated Time: %v\n", procedure.EstimatedTime)
	fmt.Printf("  Enabled: %t\n", procedure.Enabled)
	fmt.Printf("  Prerequisites: %v\n", procedure.Prerequisites)
	
	fmt.Printf("\n  Steps:\n")
	for i, step := range procedure.Steps {
		fmt.Printf("    %d. %s\n", i+1, step.Name)
		fmt.Printf("       Description: %s\n", step.Description)
		fmt.Printf("       Command: %s %v\n", step.Command, step.Args)
		fmt.Printf("       Timeout: %v\n", step.Timeout)
		if step.Rollback != "" {
			fmt.Printf("       Rollback: %s\n", step.Rollback)
		}
		fmt.Printf("\n")
	}

	return nil
}

// Testing operations
func (cli *OperationsCLI) runTest(scenarioID string) error {
	cli.logger.Infof("Running test scenario: %s", scenarioID)
	
	result, err := cli.manager.testing.RunTest(scenarioID)
	if err != nil {
		return fmt.Errorf("test execution failed: %w", err)
	}

	fmt.Printf("Test scenario completed successfully:\n")
	fmt.Printf("  ID: %s\n", result.ID)
	fmt.Printf("  Scenario: %s\n", result.ScenarioID)
	fmt.Printf("  Status: %s\n", result.Status)
	fmt.Printf("  Duration: %v\n", result.Duration)
	fmt.Printf("  Results: %v\n", result.Results)

	return nil
}

func (cli *OperationsCLI) listTestScenarios() error {
	fmt.Printf("Available Test Scenarios:\n")
	fmt.Printf("=========================\n")
	
	for id, scenario := range cli.manager.testing.scenarios {
		fmt.Printf("  %s:\n", id)
		fmt.Printf("    Name: %s\n", scenario.Name)
		fmt.Printf("    Description: %s\n", scenario.Description)
		fmt.Printf("    Type: %s\n", scenario.Type)
		fmt.Printf("    Enabled: %t\n", scenario.Enabled)
		fmt.Printf("    Steps: %d\n", len(scenario.Steps))
		fmt.Printf("    Expected: %v\n", scenario.Expected)
		fmt.Printf("\n")
	}

	return nil
}

func (cli *OperationsCLI) showTestResults(testID string) error {
	result, exists := cli.manager.testing.results[testID]
	if !exists {
		return fmt.Errorf("test result not found: %s", testID)
	}

	fmt.Printf("Test Result: %s\n", testID)
	fmt.Printf("============\n")
	fmt.Printf("  Scenario: %s\n", result.ScenarioID)
	fmt.Printf("  Status: %s\n", result.Status)
	fmt.Printf("  Start Time: %v\n", result.StartTime)
	fmt.Printf("  End Time: %v\n", result.EndTime)
	fmt.Printf("  Duration: %v\n", result.Duration)
	
	if result.Error != "" {
		fmt.Printf("  Error: %s\n", result.Error)
	}
	
	fmt.Printf("  Results: %v\n", result.Results)
	fmt.Printf("  Metadata: %v\n", result.Metadata)

	return nil
}

// Configuration operations
func (cli *OperationsCLI) showConfig() error {
	if cli.manager.config == nil {
		return fmt.Errorf("no configuration loaded")
	}

	fmt.Printf("Operations Configuration:\n")
	fmt.Printf("========================\n")
	fmt.Printf("  Enabled: %t\n", cli.manager.config.Enabled)
	fmt.Printf("  Backup Path: %s\n", cli.manager.config.BackupPath)
	fmt.Printf("  Recovery Path: %s\n", cli.manager.config.RecoveryPath)
	fmt.Printf("  Retention Days: %d\n", cli.manager.config.RetentionDays)
	fmt.Printf("  Compression: %t\n", cli.manager.config.Compression)
	fmt.Printf("  Encryption: %t\n", cli.manager.config.Encryption)
	
	if len(cli.manager.config.Metadata) > 0 {
		fmt.Printf("  Metadata:\n")
		for key, value := range cli.manager.config.Metadata {
			fmt.Printf("    %s: %s\n", key, value)
		}
	}

	return nil
}

func (cli *OperationsCLI) updateConfig(key string, value string) error {
	configManager := &OperationsConfigManager{configPath: cli.configPath, config: cli.manager.config}
	
	updates := make(map[string]interface{})
	
	// Parse value based on key type
	switch key {
	case "enabled", "compression", "encryption":
		if boolVal, err := strconv.ParseBool(value); err == nil {
			updates[key] = boolVal
		} else {
			return fmt.Errorf("invalid boolean value for %s: %s", key, value)
		}
	case "retention_days":
		if intVal, err := strconv.Atoi(value); err == nil {
			updates[key] = intVal
		} else {
			return fmt.Errorf("invalid integer value for %s: %s", key, value)
		}
	case "backup_path", "recovery_path":
		updates[key] = value
	default:
		return fmt.Errorf("unknown configuration key: %s", key)
	}

	if err := configManager.UpdateConfig(updates); err != nil {
		return fmt.Errorf("failed to update configuration: %w", err)
	}

	fmt.Printf("Configuration updated: %s = %s\n", key, value)
	return nil
}

func (cli *OperationsCLI) validateConfig() error {
	configManager := &OperationsConfigManager{configPath: cli.configPath, config: cli.manager.config}
	
	if err := configManager.ValidateConfig(); err != nil {
		return fmt.Errorf("configuration validation failed: %w", err)
	}

	fmt.Printf("Configuration validation passed\n")
	return nil
}

// Status operations
func (cli *OperationsCLI) showStatus() error {
	fmt.Printf("Operations System Status:\n")
	fmt.Printf("=========================\n")
	
	// Backup system status
	fmt.Printf("Backup System:\n")
	fmt.Printf("  Status: Active\n")
	fmt.Printf("  Strategies: %d\n", len(cli.manager.backup.strategies))
	fmt.Printf("  Schedules: %d\n", len(cli.manager.backup.schedules))
	fmt.Printf("  Storage Path: %s\n", cli.manager.backup.storage.path)
	
	// Recovery system status
	fmt.Printf("\nRecovery System:\n")
	fmt.Printf("  Status: Active\n")
	fmt.Printf("  Procedures: %d\n", len(cli.manager.recovery.procedures))
	fmt.Printf("  Plans: %d\n", len(cli.manager.recovery.plans))
	
	// Testing system status
	fmt.Printf("\nTesting System:\n")
	fmt.Printf("  Status: Active\n")
	fmt.Printf("  Scenarios: %d\n", len(cli.manager.testing.scenarios))
	fmt.Printf("  Results: %d\n", len(cli.manager.testing.results))
	
	// Data persistence status
	fmt.Printf("\nData Persistence:\n")
	fmt.Printf("  Status: Active\n")
	fmt.Printf("  Replication: %t\n", cli.manager.persistence.config.Replication)
	fmt.Printf("  Replica Count: %d\n", cli.manager.persistence.config.ReplicaCount)

	return nil
}