package main

import (
	"context"
	"fmt"
	"os"
	"sort"
	"strings"

	"github.com/spf13/cobra"
	"github.com/steveyegge/beads/internal/syncbranch"
)

var configCmd = &cobra.Command{
	Use:   "config",
	Short: "Manage configuration settings",
	Long: `Manage configuration settings for external integrations and preferences.

Configuration is stored per-project in .beads/*.db and is version-control-friendly.

Common namespaces:
  - jira.*     Jira integration settings
  - linear.*   Linear integration settings
  - github.*   GitHub integration settings
  - custom.*   Custom integration settings

Examples:
  bd config set jira.url "https://company.atlassian.net"
  bd config set jira.project "PROJ"
  bd config get jira.url
  bd config list
  bd config unset jira.url`,
}

var configSetCmd = &cobra.Command{
	Use:   "set <key> <value>",
	Short: "Set a configuration value",
	Args:  cobra.ExactArgs(2),
	Run: func(_ *cobra.Command, args []string) {
		// Config operations work in direct mode only
		if err := ensureDirectMode("config set requires direct database access"); err != nil {
			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
			os.Exit(1)
		}

		key := args[0]
		value := args[1]

		ctx := context.Background()
		
		// Special handling for sync.branch to apply validation
		if strings.TrimSpace(key) == syncbranch.ConfigKey {
			if err := syncbranch.Set(ctx, store, value); err != nil {
				fmt.Fprintf(os.Stderr, "Error setting config: %v\n", err)
				os.Exit(1)
			}
		} else {
			if err := store.SetConfig(ctx, key, value); err != nil {
				fmt.Fprintf(os.Stderr, "Error setting config: %v\n", err)
				os.Exit(1)
			}
		}

		if jsonOutput {
			outputJSON(map[string]string{
				"key":   key,
				"value": value,
			})
		} else {
			fmt.Printf("Set %s = %s\n", key, value)
		}
	},
}

var configGetCmd = &cobra.Command{
	Use:   "get <key>",
	Short: "Get a configuration value",
	Args:  cobra.ExactArgs(1),
	Run: func(cmd *cobra.Command, args []string) {
		// Config operations work in direct mode only
		if err := ensureDirectMode("config get requires direct database access"); err != nil {
			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
			os.Exit(1)
		}

		key := args[0]

		ctx := context.Background()
		var value string
		var err error
		
		// Special handling for sync.branch to support env var override
		if strings.TrimSpace(key) == syncbranch.ConfigKey {
			value, err = syncbranch.Get(ctx, store)
		} else {
			value, err = store.GetConfig(ctx, key)
		}
		
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error getting config: %v\n", err)
			os.Exit(1)
		}

		if jsonOutput {
			outputJSON(map[string]string{
				"key":   key,
				"value": value,
			})
		} else {
			if value == "" {
				fmt.Printf("%s (not set)\n", key)
			} else {
				fmt.Printf("%s\n", value)
			}
		}
	},
}

var configListCmd = &cobra.Command{
	Use:   "list",
	Short: "List all configuration",
	Run: func(cmd *cobra.Command, args []string) {
		// Config operations work in direct mode only
		if err := ensureDirectMode("config list requires direct database access"); err != nil {
			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
			os.Exit(1)
		}

		ctx := context.Background()
		config, err := store.GetAllConfig(ctx)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error listing config: %v\n", err)
			os.Exit(1)
		}

		if jsonOutput {
			outputJSON(config)
			return
		}

		if len(config) == 0 {
			fmt.Println("No configuration set")
			return
		}

		// Sort keys for consistent output
		keys := make([]string, 0, len(config))
		for k := range config {
			keys = append(keys, k)
		}
		sort.Strings(keys)

		fmt.Println("\nConfiguration:")
		for _, k := range keys {
			fmt.Printf("  %s = %s\n", k, config[k])
		}
	},
}

var configUnsetCmd = &cobra.Command{
	Use:   "unset <key>",
	Short: "Delete a configuration value",
	Args:  cobra.ExactArgs(1),
	Run: func(cmd *cobra.Command, args []string) {
		// Config operations work in direct mode only
		if err := ensureDirectMode("config unset requires direct database access"); err != nil {
			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
			os.Exit(1)
		}

		key := args[0]

		ctx := context.Background()
		if err := store.DeleteConfig(ctx, key); err != nil {
			fmt.Fprintf(os.Stderr, "Error deleting config: %v\n", err)
			os.Exit(1)
		}

		if jsonOutput {
			outputJSON(map[string]string{
				"key": key,
			})
		} else {
			fmt.Printf("Unset %s\n", key)
		}
	},
}

func init() {
	configCmd.AddCommand(configSetCmd)
	configCmd.AddCommand(configGetCmd)
	configCmd.AddCommand(configListCmd)
	configCmd.AddCommand(configUnsetCmd)
	rootCmd.AddCommand(configCmd)
}