package main

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

	"github.com/spf13/cobra"
)

var rootCmd = &cobra.Command{
	Use:   "dev",
	Short: "Development script runner",
	Long:  "A CLI tool for managing and running development scripts",
	RunE: func(cmd *cobra.Command, args []string) error {
		return cmd.Help()
	},
}

var runCmd = &cobra.Command{
	Use:   "run [script-filters...] [-- script-args...]",
	Short: "Run scripts matching filters (or all if no filters)",
	Long: `Run scripts matching filters. Use -- to pass arguments to scripts.

Scripts marked with "# REQUIRES: sudo" will automatically run with elevated privileges.

Examples:
  dev run tools/dev.sh                    # Run specific script
  dev run tools/dev.sh -- arg1 arg2       # Run with arguments
  dev run --verbose install -- --force    # Run with flags
`,
	ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
		if err := ensureRunsDir(); err != nil {
			return nil, cobra.ShellCompDirectiveNoFileComp
		}

		scripts, err := findScripts(nil)
		if err != nil {
			return nil, cobra.ShellCompDirectiveNoFileComp
		}

		var completions []string
		for _, script := range scripts {
			desc := script.Desc
			if script.RequiresSudo {
				desc = desc + " [SUDO]"
			}
			completions = append(completions, fmt.Sprintf("%s\t%s", script.RelPath, desc))
		}
		return completions, cobra.ShellCompDirectiveNoFileComp
	},
	RunE: func(cmd *cobra.Command, args []string) error {
		// Parse arguments manually to handle -- separator
		var filters []string
		var scriptArgs []string

		// Find "run" command position and -- separator in raw args
		cmdPos := -1
		separatorPos := -1
		rawArgs := os.Args

		for i, arg := range rawArgs {
			if arg == "run" {
				cmdPos = i
				break
			}
		}

		if cmdPos >= 0 {
			for i := cmdPos + 1; i < len(rawArgs); i++ {
				if rawArgs[i] == "--" {
					separatorPos = i
					break
				}
			}
		}

		if separatorPos >= 0 {
			// Get everything between 'run' and '--' as filters
			filters = rawArgs[cmdPos+1 : separatorPos]
			// Remove any flags from filters
			for i := 0; i < len(filters); i++ {
				if strings.HasPrefix(filters[i], "-") {
					filters = append(filters[:i], filters[i+1:]...)
					i--
				}
			}
			// Get everything after '--' as script args
			scriptArgs = rawArgs[separatorPos+1:]
		} else {
			// No '--' separator found, consider all non-flag args as filters
			for _, arg := range args {
				if !strings.HasPrefix(arg, "-") {
					filters = append(filters, arg)
				}
			}
		}

		if err := ensureRunsDir(); err != nil {
			return err
		}

		scripts, err := findScripts(filters)
		if err != nil {
			return err
		}

		if len(scripts) == 0 {
			if len(filters) > 0 {
				warn("No scripts match filters: %s", strings.Join(filters, ", "))
			} else {
				warn("No scripts found. Use 'dev new <name>' to create one")
			}
			return nil
		}

		for _, script := range scripts {
			if config.DryRun {
				argsStr := ""
				if len(scriptArgs) > 0 {
					argsStr = fmt.Sprintf(" with args: %s", strings.Join(scriptArgs, " "))
				}
				sudoStr := ""
				if script.RequiresSudo {
					sudoStr = " (with sudo)"
				}
				log("Would run: %s%s%s", script.RelPath, argsStr, sudoStr)
			} else {
				if err := executeScript(script, scriptArgs, config.Verbose); err != nil {
					errorLog("❌ %s failed", script.RelPath)
					if !config.Verbose {
						fmt.Printf("   Check log: %s\n", filepath.Join(config.LogsDir, strings.TrimSuffix(script.Name, filepath.Ext(script.Name))+".log"))
					}
				} else {
					if script.RequiresSudo {
						sudoLog("✅ %s completed (elevated)", script.RelPath)
					} else {
						log("✅ %s completed", script.RelPath)
					}
				}
			}
		}
		return nil
	},
}

var listCmd = &cobra.Command{
	Use:     "ls",
	Aliases: []string{"list"},
	Short:   "List all available scripts",
	RunE: func(cmd *cobra.Command, args []string) error {
		if err := ensureRunsDir(); err != nil {
			return err
		}

		scripts, err := findScripts(nil)
		if err != nil {
			return err
		}

		if len(scripts) == 0 {
			warn("No scripts found in %s", config.RunsDir)
			fmt.Println("Use 'dev new <n>' to create a new script")
			return nil
		}

		fmt.Printf("Available scripts in %s:\n\n", config.RunsDir)
		for _, script := range scripts {
			if script.RequiresSudo {
				fmt.Printf("  %s%s%s - %s %s[SUDO]%s\n",
					Blue, script.RelPath, NC, script.Desc, Purple, NC)
			} else {
				fmt.Printf("  %s%s%s - %s\n",
					Blue, script.RelPath, NC, script.Desc)
			}
		}

		sudoCount := 0
		for _, script := range scripts {
			if script.RequiresSudo {
				sudoCount++
			}
		}

		fmt.Printf("\nTotal: %d scripts", len(scripts))
		if sudoCount > 0 {
			fmt.Printf(" (%d require elevated privileges)", sudoCount)
		}
		fmt.Println()
		return nil
	},
}

var newCmd = &cobra.Command{
	Use:   "new <name>",
	Short: "Create a new script template",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		return createNewScript(args[0])
	},
}

var pushCmd = &cobra.Command{
	Use:     "push",
	Aliases: []string{"u", "ush"},
	Short:   "Commit, scan for secrets, and push to git origin",
	RunE: func(cmd *cobra.Command, args []string) error {
		return handlePush()
	},
}

var depsCmd = &cobra.Command{
	Use:   "deps",
	Short: "Install dependencies",
	RunE: func(cmd *cobra.Command, args []string) error {
		return checkDependencies()
	},
}

var completionCmd = &cobra.Command{
	Use:   "completion [bash|zsh|fish]",
	Short: "Generate completion script",
	Long: `To load completions:

Bash:
  $ source <(dev completion bash)

  # To load completions for each session, execute once:
  # Linux:
  $ dev completion bash > /etc/bash_completion.d/dev
  # macOS:
  $ dev completion bash > $(brew --prefix)/etc/bash_completion.d/dev

Zsh:
  # If shell completion is not already enabled in your environment,
  # you will need to enable it.  You can execute the following once:
  $ echo "autoload -U compinit; compinit" >> ~/.zshrc

  # To load completions for each session, execute once:
  $ dev completion zsh > "${fpath[1]}/_dev"

  # You will need to start a new shell for this setup to take effect.
`,
	DisableFlagsInUseLine: true,
	ValidArgs:             []string{"bash", "zsh", "fish"},
	Args:                  cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
	RunE: func(cmd *cobra.Command, args []string) error {
		switch args[0] {
		case "bash":
			return rootCmd.GenBashCompletion(os.Stdout)
		case "zsh":
			return rootCmd.GenZshCompletion(os.Stdout)
		case "fish":
			return rootCmd.GenFishCompletion(os.Stdout, true)
		}
		return nil
	},
}