// Package cmd provides CLI commands for the gt tool.
package cmd

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

	"github.com/spf13/cobra"
	"github.com/steveyegge/gastown/internal/config"
	"github.com/steveyegge/gastown/internal/git"
	"github.com/steveyegge/gastown/internal/rig"
	"github.com/steveyegge/gastown/internal/style"
	"github.com/steveyegge/gastown/internal/workspace"
)

var rigCmd = &cobra.Command{
	Use:   "rig",
	Short: "Manage rigs in the workspace",
	Long: `Manage rigs (project containers) in the Gas Town workspace.

A rig is a container for managing a project and its agents:
  - refinery/rig/  Canonical main clone (Refinery's working copy)
  - mayor/rig/     Mayor's working clone for this rig
  - crew/<name>/   Human workspace(s)
  - witness/       Witness agent (no clone)
  - polecats/      Worker directories
  - .beads/        Rig-level issue tracking`,
}

var rigAddCmd = &cobra.Command{
	Use:   "add <name> <git-url>",
	Short: "Add a new rig to the workspace",
	Long: `Add a new rig by cloning a repository.

This creates a rig container with:
  - config.json           Rig configuration
  - .beads/               Rig-level issue tracking (initialized)
  - refinery/rig/         Canonical main clone
  - mayor/rig/            Mayor's working clone
  - crew/main/            Default human workspace
  - witness/              Witness agent directory
  - polecats/             Worker directory (empty)

Example:
  gt rig add gastown https://github.com/steveyegge/gastown
  gt rig add my-project git@github.com:user/repo.git --prefix mp`,
	Args: cobra.ExactArgs(2),
	RunE: runRigAdd,
}

var rigListCmd = &cobra.Command{
	Use:   "list",
	Short: "List all rigs in the workspace",
	RunE:  runRigList,
}

var rigRemoveCmd = &cobra.Command{
	Use:   "remove <name>",
	Short: "Remove a rig from the registry (does not delete files)",
	Args:  cobra.ExactArgs(1),
	RunE:  runRigRemove,
}

// Flags
var (
	rigAddPrefix string
	rigAddCrew   string
)

func init() {
	rootCmd.AddCommand(rigCmd)
	rigCmd.AddCommand(rigAddCmd)
	rigCmd.AddCommand(rigListCmd)
	rigCmd.AddCommand(rigRemoveCmd)

	rigAddCmd.Flags().StringVar(&rigAddPrefix, "prefix", "", "Beads issue prefix (default: derived from name)")
	rigAddCmd.Flags().StringVar(&rigAddCrew, "crew", "main", "Default crew workspace name")
}

func runRigAdd(cmd *cobra.Command, args []string) error {
	name := args[0]
	gitURL := args[1]

	// Find workspace
	townRoot, err := workspace.FindFromCwdOrError()
	if err != nil {
		return fmt.Errorf("not in a Gas Town workspace: %w", err)
	}

	// Load rigs config
	rigsPath := filepath.Join(townRoot, "mayor", "rigs.json")
	rigsConfig, err := config.LoadRigsConfig(rigsPath)
	if err != nil {
		// Create new if doesn't exist
		rigsConfig = &config.RigsConfig{
			Version: 1,
			Rigs:    make(map[string]config.RigEntry),
		}
	}

	// Create rig manager
	g := git.NewGit(townRoot)
	mgr := rig.NewManager(townRoot, rigsConfig, g)

	fmt.Printf("Creating rig %s...\n", style.Bold.Render(name))
	fmt.Printf("  Repository: %s\n", gitURL)

	startTime := time.Now()

	// Add the rig
	newRig, err := mgr.AddRig(rig.AddRigOptions{
		Name:        name,
		GitURL:      gitURL,
		BeadsPrefix: rigAddPrefix,
		CrewName:    rigAddCrew,
	})
	if err != nil {
		return fmt.Errorf("adding rig: %w", err)
	}

	// Save updated rigs config
	if err := config.SaveRigsConfig(rigsPath, rigsConfig); err != nil {
		return fmt.Errorf("saving rigs config: %w", err)
	}

	elapsed := time.Since(startTime)

	fmt.Printf("\n%s Rig created in %.1fs\n", style.Success.Render("✓"), elapsed.Seconds())
	fmt.Printf("\nStructure:\n")
	fmt.Printf("  %s/\n", name)
	fmt.Printf("  ├── config.json\n")
	fmt.Printf("  ├── .beads/           (prefix: %s)\n", newRig.Config.Prefix)
	fmt.Printf("  ├── refinery/rig/     (canonical main)\n")
	fmt.Printf("  ├── mayor/rig/        (mayor's clone)\n")
	fmt.Printf("  ├── crew/%s/        (your workspace)\n", rigAddCrew)
	fmt.Printf("  ├── witness/\n")
	fmt.Printf("  └── polecats/\n")

	fmt.Printf("\nNext steps:\n")
	fmt.Printf("  cd %s/crew/%s    # Work in your clone\n", filepath.Join(townRoot, name), rigAddCrew)
	fmt.Printf("  bd ready                 # See available work\n")

	return nil
}

func runRigList(cmd *cobra.Command, args []string) error {
	// Find workspace
	townRoot, err := workspace.FindFromCwdOrError()
	if err != nil {
		return fmt.Errorf("not in a Gas Town workspace: %w", err)
	}

	// Load rigs config
	rigsPath := filepath.Join(townRoot, "mayor", "rigs.json")
	rigsConfig, err := config.LoadRigsConfig(rigsPath)
	if err != nil {
		fmt.Println("No rigs configured.")
		return nil
	}

	if len(rigsConfig.Rigs) == 0 {
		fmt.Println("No rigs configured.")
		fmt.Printf("\nAdd one with: %s\n", style.Dim.Render("gt rig add <name> <git-url>"))
		return nil
	}

	// Create rig manager to get details
	g := git.NewGit(townRoot)
	mgr := rig.NewManager(townRoot, rigsConfig, g)

	fmt.Printf("Rigs in %s:\n\n", townRoot)

	for name := range rigsConfig.Rigs {
		r, err := mgr.GetRig(name)
		if err != nil {
			fmt.Printf("  %s %s\n", style.Warning.Render("!"), name)
			continue
		}

		summary := r.Summary()
		fmt.Printf("  %s\n", style.Bold.Render(name))
		fmt.Printf("    Polecats: %d  Crew: %d\n", summary.PolecatCount, summary.CrewCount)

		agents := []string{}
		if summary.HasRefinery {
			agents = append(agents, "refinery")
		}
		if summary.HasWitness {
			agents = append(agents, "witness")
		}
		if r.HasMayor {
			agents = append(agents, "mayor")
		}
		if len(agents) > 0 {
			fmt.Printf("    Agents: %v\n", agents)
		}
		fmt.Println()
	}

	return nil
}

func runRigRemove(cmd *cobra.Command, args []string) error {
	name := args[0]

	// Find workspace
	townRoot, err := workspace.FindFromCwdOrError()
	if err != nil {
		return fmt.Errorf("not in a Gas Town workspace: %w", err)
	}

	// Load rigs config
	rigsPath := filepath.Join(townRoot, "mayor", "rigs.json")
	rigsConfig, err := config.LoadRigsConfig(rigsPath)
	if err != nil {
		return fmt.Errorf("loading rigs config: %w", err)
	}

	// Create rig manager
	g := git.NewGit(townRoot)
	mgr := rig.NewManager(townRoot, rigsConfig, g)

	if err := mgr.RemoveRig(name); err != nil {
		return fmt.Errorf("removing rig: %w", err)
	}

	// Save updated config
	if err := config.SaveRigsConfig(rigsPath, rigsConfig); err != nil {
		return fmt.Errorf("saving rigs config: %w", err)
	}

	fmt.Printf("%s Rig %s removed from registry\n", style.Success.Render("✓"), name)
	fmt.Printf("\nNote: Files at %s were NOT deleted.\n", filepath.Join(townRoot, name))
	fmt.Printf("To delete: %s\n", style.Dim.Render(fmt.Sprintf("rm -rf %s", filepath.Join(townRoot, name))))

	return nil
}

// Helper to check if path exists
func pathExists(path string) bool {
	_, err := os.Stat(path)
	return err == nil
}