package cmd

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"github.com/spf13/cobra"
	"github.com/iwasforcedtobehere/git-automation-cli/internal/git"
	"github.com/iwasforcedtobehere/git-automation-cli/internal/validation"
)

var commitCmd = &cobra.Command{
	Use:   "commit",
	Short: "Commit utilities",
	Long: `Create and manage Git commits with templates and helpers.
Supports conventional commit format and commit message templates.`,
}

var commitCreateCmd = &cobra.Command{
	Use:   "create [message]",
	Short: "Create a new commit",
	Args:  cobra.MinimumNArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		message := strings.Join(args, " ")
		
		// Validate Git repository
		if validationResult := validation.ValidateGitRepository(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Validate commit message
		if validationResult := validation.ValidateCommitMessage(message); !validationResult.IsValid {
			return fmt.Errorf("invalid commit message: %s", validationResult.GetErrors())
		}
		
		// Check if working directory is clean
		if validationResult := validation.ValidateWorkingDirectory(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Add all changes
		if err := git.AddAll(ctx); err != nil {
			return fmt.Errorf("failed to add changes: %w", err)
		}
		
		// Create commit
		if err := git.Commit(ctx, message); err != nil {
			return fmt.Errorf("failed to create commit: %w", err)
		}
		
		fmt.Printf("Created commit: %s\n", message)
		return nil
	},
}

var commitAmendCmd = &cobra.Command{
	Use:   "amend",
	Short: "Amend the last commit",
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		
		// Validate Git repository
		if validationResult := validation.ValidateGitRepository(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Check if working directory is clean
		if validationResult := validation.ValidateWorkingDirectory(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Add all changes
		if err := git.AddAll(ctx); err != nil {
			return fmt.Errorf("failed to add changes: %w", err)
		}
		
		// Amend commit
		var err error
		_, err = git.Run(ctx, "commit", "--amend", "--no-edit")
		if err != nil {
			return fmt.Errorf("failed to amend commit: %w", err)
		}
		
		fmt.Println("Amended last commit")
		return nil
	},
}

var commitFixupCmd = &cobra.Command{
	Use:   "fixup [commit]",
	Short: "Create a fixup commit",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		commit := args[0]
		
		// Validate Git repository
		if validationResult := validation.ValidateGitRepository(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Check if working directory is clean
		if validationResult := validation.ValidateWorkingDirectory(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Add all changes
		if err := git.AddAll(ctx); err != nil {
			return fmt.Errorf("failed to add changes: %w", err)
		}
		
		// Create fixup commit
		var err error
		_, err = git.Run(ctx, "commit", "--fixup", commit)
		if err != nil {
			return fmt.Errorf("failed to create fixup commit: %w", err)
		}
		
		fmt.Printf("Created fixup commit for %s\n", commit)
		return nil
	},
}

var commitConventionalCmd = &cobra.Command{
	Use:   "conventional",
	Short: "Create a conventional commit",
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		
		// Get commit type
		fmt.Println("Select commit type:")
		fmt.Println("1. feat: A new feature")
		fmt.Println("2. fix: A bug fix")
		fmt.Println("3. docs: Documentation only changes")
		fmt.Println("4. style: Changes that do not affect the meaning of the code")
		fmt.Println("5. refactor: A code change that neither fixes a bug nor adds a feature")
		fmt.Println("6. perf: A code change that improves performance")
		fmt.Println("7. test: Adding missing tests or correcting existing tests")
		fmt.Println("8. build: Changes that affect the build system or external dependencies")
		fmt.Println("9. ci: Changes to our CI configuration files and scripts")
		fmt.Println("10. chore: Other changes that don't modify src or test files")
		
		var choice int
		fmt.Print("Enter choice (1-10): ")
		fmt.Scanln(&choice)
		
		var commitType string
		switch choice {
		case 1:
			commitType = "feat"
		case 2:
			commitType = "fix"
		case 3:
			commitType = "docs"
		case 4:
			commitType = "style"
		case 5:
			commitType = "refactor"
		case 6:
			commitType = "perf"
		case 7:
			commitType = "test"
		case 8:
			commitType = "build"
		case 9:
			commitType = "ci"
		case 10:
			commitType = "chore"
		default:
			return fmt.Errorf("invalid choice")
		}
		
		// Get scope
		fmt.Print("Enter scope (optional, press Enter to skip): ")
		reader := bufio.NewReader(os.Stdin)
		scope, _ := reader.ReadString('\n')
		scope = strings.TrimSpace(scope)
		
		// Get description
		fmt.Print("Enter description: ")
		description, _ := reader.ReadString('\n')
		description = strings.TrimSpace(description)
		if description == "" {
			return fmt.Errorf("description is required")
		}
		
		// Get body (optional)
		fmt.Print("Enter detailed description (optional, press Enter to skip): ")
		body, _ := reader.ReadString('\n')
		body = strings.TrimSpace(body)
		
		// Build commit message
		var message string
		if scope != "" {
			message = fmt.Sprintf("%s(%s): %s", commitType, scope, description)
		} else {
			message = fmt.Sprintf("%s: %s", commitType, description)
		}
		
		if body != "" {
			message += "\n\n" + body
		}
		
		// Validate Git repository
		if validationResult := validation.ValidateGitRepository(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Validate conventional commit message
		if validationResult := validation.ValidateConventionalCommit(message); !validationResult.IsValid {
			return fmt.Errorf("invalid conventional commit message: %s", validationResult.GetErrors())
		}
		
		// Check if working directory is clean
		if validationResult := validation.ValidateWorkingDirectory(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Add all changes
		if err := git.AddAll(ctx); err != nil {
			return fmt.Errorf("failed to add changes: %w", err)
		}
		
		// Create commit
		if err := git.Commit(ctx, message); err != nil {
			return fmt.Errorf("failed to create commit: %w", err)
		}
		
		fmt.Printf("Created conventional commit: %s\n", message)
		return nil
	},
}

var commitSignoffCmd = &cobra.Command{
	Use:   "signoff [message]",
	Short: "Create a commit with sign-off",
	Args:  cobra.MinimumNArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		message := strings.Join(args, " ")
		
		// Validate Git repository
		if validationResult := validation.ValidateGitRepository(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Validate commit message
		if validationResult := validation.ValidateCommitMessage(message); !validationResult.IsValid {
			return fmt.Errorf("invalid commit message: %s", validationResult.GetErrors())
		}
		
		// Check if working directory is clean
		if validationResult := validation.ValidateWorkingDirectory(ctx); !validationResult.IsValid {
			return fmt.Errorf(validationResult.GetErrors())
		}
		
		// Add all changes
		if err := git.AddAll(ctx); err != nil {
			return fmt.Errorf("failed to add changes: %w", err)
		}
		
		// Create commit with sign-off
		var err error
		_, err = git.Run(ctx, "commit", "-s", "-m", message)
		if err != nil {
			return fmt.Errorf("failed to create commit: %w", err)
		}
		
		fmt.Printf("Created signed-off commit: %s\n", message)
		return nil
	},
}

func init() {
	rootCmd.AddCommand(commitCmd)
	commitCmd.AddCommand(commitCreateCmd)
	commitCmd.AddCommand(commitAmendCmd)
	commitCmd.AddCommand(commitFixupCmd)
	commitCmd.AddCommand(commitConventionalCmd)
	commitCmd.AddCommand(commitSignoffCmd)
}