package cli

import (
	"fmt"

	"github.com/urfave/cli/v2"
)

// deployCommand creates the 'deploy' command group
func deployCommand() *cli.Command {
	return &cli.Command{
		Name:  "deploy",
		Usage: "Deploy agents to hosted environments",
		Subcommands: []*cli.Command{
			deployCloudRunCommand(),
			deployAgentEngineCommand(),
		},
	}
}

// deployCloudRunCommand creates the 'deploy cloud-run' subcommand
func deployCloudRunCommand() *cli.Command {
	flags := append(commonServiceFlags(), webServerFlags()...)
	flags = append(flags, []cli.Flag{
		&cli.StringFlag{
			Name:     "project",
			Usage:    "Google Cloud project to deploy to",
			Required: true,
		},
		&cli.StringFlag{
			Name:     "region",
			Usage:    "Google Cloud region to deploy to",
			Required: true,
		},
		&cli.StringFlag{
			Name:  "service-name",
			Usage: "Cloud Run service name",
			Value: "adk-default-service-name",
		},
		&cli.StringFlag{
			Name:  "app-name",
			Usage: "App name for the ADK API server",
		},
		&cli.BoolFlag{
			Name:  "with-ui",
			Usage: "Deploy with web UI",
		},
		&cli.StringFlag{
			Name:  "temp-folder",
			Usage: "Temporary folder for deployment files",
		},
		&cli.StringFlag{
			Name:  "adk-version",
			Usage: "ADK version to use",
			Value: "latest",
		},
	}...)

	return &cli.Command{
		Name:      "cloud-run",
		Usage:     "Deploy agent to Google Cloud Run",
		ArgsUsage: "AGENT_PATH",
		Flags:     flags,
		Action:    deployCloudRunAction,
	}
}

func deployCloudRunAction(c *cli.Context) error {
	agentPath := c.Args().First()
	if agentPath == "" {
		return fmt.Errorf("AGENT_PATH is required")
	}

	project := c.String("project")
	region := c.String("region")
	serviceName := c.String("service-name")
	appName := c.String("app-name")
	withUI := c.Bool("with-ui")
	tempFolder := c.String("temp-folder")
	adkVersion := c.String("adk-version")

	fmt.Printf("Deploying agent to Cloud Run...\n")
	fmt.Printf("Agent path: %s\n", agentPath)
	fmt.Printf("Project: %s\n", project)
	fmt.Printf("Region: %s\n", region)
	fmt.Printf("Service name: %s\n", serviceName)
	if appName != "" {
		fmt.Printf("App name: %s\n", appName)
	}
	fmt.Printf("With UI: %v\n", withUI)
	if tempFolder != "" {
		fmt.Printf("Temp folder: %s\n", tempFolder)
	}
	fmt.Printf("ADK version: %s\n", adkVersion)

	// TODO: Implement Cloud Run deployment
	// This would involve:
	// 1. Creating a temporary directory with deployment files
	// 2. Generating Dockerfile for the agent
	// 3. Building and pushing container image
	// 4. Deploying to Cloud Run using gcloud CLI or Cloud Build

	return fmt.Errorf("cloud-run deployment not yet implemented")
}

// deployAgentEngineCommand creates the 'deploy agent-engine' subcommand
func deployAgentEngineCommand() *cli.Command {
	return &cli.Command{
		Name:      "agent-engine",
		Usage:     "Deploy agent to Google Agent Engine",
		ArgsUsage: "AGENT_PATH",
		Flags: []cli.Flag{
			&cli.StringFlag{
				Name:     "project",
				Usage:    "Google Cloud project to deploy to",
				Required: true,
			},
			&cli.StringFlag{
				Name:     "region",
				Usage:    "Google Cloud region to deploy to",
				Required: true,
			},
			&cli.StringFlag{
				Name:     "staging-bucket",
				Usage:    "GCS bucket for staging deployment artifacts",
				Required: true,
			},
			&cli.BoolFlag{
				Name:  "trace-to-cloud",
				Usage: "Enable Cloud Trace for Agent Engine",
			},
			&cli.StringFlag{
				Name:  "display-name",
				Usage: "Display name of the agent in Agent Engine",
			},
			&cli.StringFlag{
				Name:  "description",
				Usage: "Description of the agent in Agent Engine",
			},
			&cli.StringFlag{
				Name:  "adk-app",
				Usage: "Go file for defining the ADK application",
				Value: "agent_engine_app.go",
			},
			&cli.StringFlag{
				Name:  "temp-folder",
				Usage: "Temporary folder for deployment files",
			},
			&cli.StringFlag{
				Name:  "env-file",
				Usage: "Path to .env file for environment variables",
			},
			&cli.StringFlag{
				Name:  "requirements-file",
				Usage: "Path to go.mod file to use",
			},
		},
		Action: deployAgentEngineAction,
	}
}

func deployAgentEngineAction(c *cli.Context) error {
	agentPath := c.Args().First()
	if agentPath == "" {
		return fmt.Errorf("AGENT_PATH is required")
	}

	project := c.String("project")
	region := c.String("region")
	stagingBucket := c.String("staging-bucket")
	traceToCloud := c.Bool("trace-to-cloud")
	displayName := c.String("display-name")
	description := c.String("description")
	adkApp := c.String("adk-app")
	tempFolder := c.String("temp-folder")
	envFile := c.String("env-file")
	requirementsFile := c.String("requirements-file")

	fmt.Printf("Deploying agent to Agent Engine...\n")
	fmt.Printf("Agent path: %s\n", agentPath)
	fmt.Printf("Project: %s\n", project)
	fmt.Printf("Region: %s\n", region)
	fmt.Printf("Staging bucket: %s\n", stagingBucket)
	fmt.Printf("Trace to cloud: %v\n", traceToCloud)
	if displayName != "" {
		fmt.Printf("Display name: %s\n", displayName)
	}
	if description != "" {
		fmt.Printf("Description: %s\n", description)
	}
	fmt.Printf("ADK app: %s\n", adkApp)
	if tempFolder != "" {
		fmt.Printf("Temp folder: %s\n", tempFolder)
	}
	if envFile != "" {
		fmt.Printf("Env file: %s\n", envFile)
	}
	if requirementsFile != "" {
		fmt.Printf("Requirements file: %s\n", requirementsFile)
	}

	// TODO: Implement Agent Engine deployment
	// This would involve:
	// 1. Creating deployment package with Go agent
	// 2. Uploading to staging bucket
	// 3. Deploying to Agent Engine using appropriate APIs

	return fmt.Errorf("agent-engine deployment not yet implemented")
}
