package cli

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

	"github.com/spf13/cobra"

	"git.unkin.net/unkin/teabot/internal/config"
)

func newConfigCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "config",
		Short: "Inspect and scaffold teabot configuration",
	}
	cmd.AddCommand(newConfigInitCmd())
	cmd.AddCommand(newConfigShowCmd())
	return cmd
}

func newConfigInitCmd() *cobra.Command {
	var force bool
	cmd := &cobra.Command{
		Use:   "init",
		Short: "Write an example config file",
		RunE: func(cmd *cobra.Command, _ []string) error {
			path := configPath
			if _, err := os.Stat(path); err == nil && !force {
				return fmt.Errorf("config %s already exists (use --force to overwrite)", path)
			}
			if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
				return err
			}
			if err := os.WriteFile(path, []byte(config.Example), 0o644); err != nil {
				return err
			}
			_, err := fmt.Fprintf(cmd.OutOrStdout(),
				"wrote example config to %s\nedit it, then create the referenced tea config files with `tea logins add`.\n",
				path)
			return err
		},
	}
	cmd.Flags().BoolVar(&force, "force", false, "overwrite an existing config file")
	return cmd
}

func newConfigShowCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "show",
		Short: "Validate and print the effective configuration",
		RunE: func(cmd *cobra.Command, _ []string) error {
			cfg, err := config.Load(configPath)
			if err != nil {
				return err
			}
			lines := []string{
				fmt.Sprintf("config:         %s", configPath),
				fmt.Sprintf("gitea_url:      %s", cfg.GiteaURL),
				fmt.Sprintf("state_dir:      %s", cfg.StateDirOrDefault()),
				fmt.Sprintf("poll_interval:  %s", cfg.PollInterval),
				fmt.Sprintf("job_timeout:    %s", cfg.JobTimeout),
				fmt.Sprintf("max_concurrent: %d", cfg.MaxConcurrent),
				fmt.Sprintf("job_image:      %s", cfg.JobImage),
				fmt.Sprintf("claude_config:  %s", cfg.ClaudeConfigDir),
			}
			if cfg.AnthropicBaseURL != "" {
				lines = append(lines, "anthropic_base_url: "+cfg.AnthropicBaseURL)
			}
			if cfg.AnthropicAPIKey != "" {
				lines = append(lines, "anthropic_api_key: (set)")
			}
			lines = append(lines, "repos:")
			for _, r := range cfg.Repos {
				lines = append(lines, "  - "+r)
			}
			lines = append(lines, "personalities:")
			for _, p := range cfg.Personalities {
				lines = append(lines, fmt.Sprintf("  - %s (role=%s, login=%s)", p.Name, p.Role, p.Login))
			}
			_, err = fmt.Fprintln(cmd.OutOrStdout(), strings.Join(lines, "\n"))
			return err
		},
	}
}