package main

import (
	"context"
	"fmt"
	"os"
	"time"

	"github.com/spf13/cobra"

	"github.com/multica-ai/multica/server/internal/cli"
)

var runtimeCmd = &cobra.Command{
	Use:   "runtime",
	Short: "Work with agent runtimes",
}

var runtimeListCmd = &cobra.Command{
	Use:   "list",
	Short: "List runtimes in the workspace",
	RunE:  runRuntimeList,
}

var runtimeUsageCmd = &cobra.Command{
	Use:   "usage <runtime-id>",
	Short: "Get token usage for a runtime",
	Args:  exactArgs(1),
	RunE:  runRuntimeUsage,
}

var runtimeActivityCmd = &cobra.Command{
	Use:   "activity <runtime-id>",
	Short: "Get hourly task activity for a runtime",
	Args:  exactArgs(1),
	RunE:  runRuntimeActivity,
}

var runtimeUpdateCmd = &cobra.Command{
	Use:   "update <runtime-id>",
	Short: "Initiate a CLI update on a runtime",
	Args:  exactArgs(1),
	RunE:  runRuntimeUpdate,
}

func init() {
	runtimeCmd.AddCommand(runtimeListCmd)
	runtimeCmd.AddCommand(runtimeUsageCmd)
	runtimeCmd.AddCommand(runtimeActivityCmd)
	runtimeCmd.AddCommand(runtimeUpdateCmd)

	// runtime list
	runtimeListCmd.Flags().String("output", "table", "Output format: table or json")

	// runtime usage
	runtimeUsageCmd.Flags().String("output", "table", "Output format: table or json")
	runtimeUsageCmd.Flags().Int("days", 90, "Number of days of usage data to retrieve (max 365)")

	// runtime activity
	runtimeActivityCmd.Flags().String("output", "table", "Output format: table or json")

	// runtime update
	runtimeUpdateCmd.Flags().String("target-version", "", "Target version to update to (required)")
	runtimeUpdateCmd.Flags().String("output", "json", "Output format: table or json")
	runtimeUpdateCmd.Flags().Bool("wait", false, "Wait for update to complete (poll until done)")
}

// ---------------------------------------------------------------------------
// Runtime commands
// ---------------------------------------------------------------------------

func runRuntimeList(cmd *cobra.Command, _ []string) error {
	client, err := newAPIClient(cmd)
	if err != nil {
		return err
	}

	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()

	var runtimes []map[string]any
	if err := client.GetJSON(ctx, "/api/runtimes", &runtimes); err != nil {
		return fmt.Errorf("list runtimes: %w", err)
	}

	output, _ := cmd.Flags().GetString("output")
	if output == "json" {
		return cli.PrintJSON(os.Stdout, runtimes)
	}

	headers := []string{"ID", "NAME", "MODE", "PROVIDER", "STATUS", "LAST_SEEN"}
	rows := make([][]string, 0, len(runtimes))
	for _, rt := range runtimes {
		rows = append(rows, []string{
			strVal(rt, "id"),
			strVal(rt, "name"),
			strVal(rt, "runtime_mode"),
			strVal(rt, "provider"),
			strVal(rt, "status"),
			strVal(rt, "last_seen_at"),
		})
	}
	cli.PrintTable(os.Stdout, headers, rows)
	return nil
}

func runRuntimeUsage(cmd *cobra.Command, args []string) error {
	client, err := newAPIClient(cmd)
	if err != nil {
		return err
	}

	days, _ := cmd.Flags().GetInt("days")
	if days < 1 || days > 365 {
		return fmt.Errorf("--days must be between 1 and 365")
	}

	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()

	var usage []map[string]any
	path := fmt.Sprintf("/api/runtimes/%s/usage?days=%d", args[0], days)
	if err := client.GetJSON(ctx, path, &usage); err != nil {
		return fmt.Errorf("get runtime usage: %w", err)
	}

	output, _ := cmd.Flags().GetString("output")
	if output == "json" {
		return cli.PrintJSON(os.Stdout, usage)
	}

	headers := []string{"DATE", "PROVIDER", "MODEL", "INPUT_TOKENS", "OUTPUT_TOKENS", "CACHE_READ", "CACHE_WRITE"}
	rows := make([][]string, 0, len(usage))
	for _, u := range usage {
		rows = append(rows, []string{
			strVal(u, "date"),
			strVal(u, "provider"),
			strVal(u, "model"),
			strVal(u, "input_tokens"),
			strVal(u, "output_tokens"),
			strVal(u, "cache_read_tokens"),
			strVal(u, "cache_write_tokens"),
		})
	}
	cli.PrintTable(os.Stdout, headers, rows)
	return nil
}

func runRuntimeActivity(cmd *cobra.Command, args []string) error {
	client, err := newAPIClient(cmd)
	if err != nil {
		return err
	}

	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()

	var activity []map[string]any
	if err := client.GetJSON(ctx, "/api/runtimes/"+args[0]+"/activity", &activity); err != nil {
		return fmt.Errorf("get runtime activity: %w", err)
	}

	output, _ := cmd.Flags().GetString("output")
	if output == "json" {
		return cli.PrintJSON(os.Stdout, activity)
	}

	headers := []string{"HOUR", "COUNT"}
	rows := make([][]string, 0, len(activity))
	for _, a := range activity {
		rows = append(rows, []string{
			strVal(a, "hour"),
			strVal(a, "count"),
		})
	}
	cli.PrintTable(os.Stdout, headers, rows)
	return nil
}

func runRuntimeUpdate(cmd *cobra.Command, args []string) error {
	client, err := newAPIClient(cmd)
	if err != nil {
		return err
	}

	targetVersion, _ := cmd.Flags().GetString("target-version")
	if targetVersion == "" {
		return fmt.Errorf("--target-version is required")
	}

	ctx, cancel := context.WithTimeout(context.Background(), 150*time.Second)
	defer cancel()

	body := map[string]any{
		"target_version": targetVersion,
	}

	var update map[string]any
	if err := client.PostJSON(ctx, "/api/runtimes/"+args[0]+"/update", body, &update); err != nil {
		return fmt.Errorf("initiate update: %w", err)
	}

	wait, _ := cmd.Flags().GetBool("wait")
	if !wait {
		output, _ := cmd.Flags().GetString("output")
		if output == "json" {
			return cli.PrintJSON(os.Stdout, update)
		}
		fmt.Printf("Update initiated: %s (status: %s)\n", strVal(update, "id"), strVal(update, "status"))
		return nil
	}

	// Poll until completed/failed/timeout.
	updateID := strVal(update, "id")
	for {
		select {
		case <-ctx.Done():
			return fmt.Errorf("timed out waiting for update (last status: %s)", strVal(update, "status"))
		case <-time.After(2 * time.Second):
		}

		if err := client.GetJSON(ctx, "/api/runtimes/"+args[0]+"/update/"+updateID, &update); err != nil {
			return fmt.Errorf("get update status: %w", err)
		}

		status := strVal(update, "status")
		if status == "completed" || status == "failed" || status == "timeout" {
			output, _ := cmd.Flags().GetString("output")
			if output == "json" {
				return cli.PrintJSON(os.Stdout, update)
			}
			if status == "completed" {
				fmt.Printf("Update completed: %s\n", strVal(update, "output"))
			} else {
				fmt.Printf("Update %s: %s\n", status, strVal(update, "error"))
			}
			return nil
		}
	}
}
