package prep

// initializes logging and command line options

import (
	"fmt"
	"io/ioutil"
	"os"
	"strings"
)

// deprecate this
func Bash3(dest any) *Auto {
	return Autocomplete(dest)
}

// deprecate this
func Bash(dest any) *Auto {
	return Autocomplete(dest)
}

func makeCompletionText(argname string) string {
	sh := getParentProcessName()
	return fmt.Sprintf("# shell might be %s", sh)
}

func makeBashCompletionText(argname string) string {
	var out string

	out += fmt.Sprintf("# add this in your bashrc:\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("# todo: add this to go-arg as a 'hidden' go-arg option --bash\n")
	out += fmt.Sprintf("#\n")
	out += fmt.Sprintf("# Put the below in the file: ~/.local/share/bash-completion/completions/%s\n", argname)
	out += fmt.Sprintf("#\n")
	out += fmt.Sprintf("# todo: make this output work/parse with:\n")
	out += fmt.Sprintf("# complete -C %s --bash go\n", argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("_%s_complete()\n", argname)
	out += fmt.Sprintf("{\n")
	out += fmt.Sprintf("	# sets local to this func vars\n")
	out += fmt.Sprintf("	local cur prev all\n")
	out += fmt.Sprintf("	cur=${COMP_WORDS[COMP_CWORD]}\n")
	out += fmt.Sprintf("	prev=${COMP_WORDS[COMP_CWORD-1]}\n")
	out += fmt.Sprintf("	all=${COMP_WORDS[@]}\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("	# this is where we generate the go-arg output\n")
	out += fmt.Sprintf("        GOARGS=$(%s --auto-complete $prev \\'$cur\\' $all)\n", argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("	# this compares the command line input from the user\n")
	out += fmt.Sprintf("	# to whatever strings we output\n")
	out += fmt.Sprintf("        COMPREPLY=( $(compgen -W \"$GOARGS\" -- $cur) )  # THIS WORKS\n")
	out += fmt.Sprintf("	return 0\n")
	out += fmt.Sprintf("}\n")
	out += fmt.Sprintf("complete -F _%s_complete %s\n", argname, argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("# copy and paste the above into your bash shell should work\n")
	return out
}

func makeBashCompletionText2(argname string) string {
	var out string

	out += fmt.Sprintf("# add this in your bashrc:\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("# todo: add this to go-arg as a 'hidden' go-arg option --bash\n")
	out += fmt.Sprintf("#\n")
	out += fmt.Sprintf("# Put the below in the file: ~/.local/share/bash-completion/completions/%s\n", argname)
	out += fmt.Sprintf("#\n")
	out += fmt.Sprintf("# todo: make this output work/parse with:\n")
	out += fmt.Sprintf("# complete -C %s --bash go\n", argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("_%s_complete()\n", argname)
	out += fmt.Sprintf("{\n")
	out += fmt.Sprintf("	# sets local to this func vars\n")
	out += fmt.Sprintf("	local cur prev all\n")
	out += fmt.Sprintf("	cur=${COMP_WORDS[COMP_CWORD]}\n")
	out += fmt.Sprintf("	# prev=${COMP_WORDS[COMP_CWORD-1]}\n")
	out += fmt.Sprintf("	all=${COMP_WORDS[@]}\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("	# this is where we generate the go-arg output\n")
	out += fmt.Sprintf("        GOARGS=$(%s --auto-complete \\'$cur\\' $all)\n", argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("	# this compares the command line input from the user\n")
	out += fmt.Sprintf("	# to whatever strings we output\n")
	out += fmt.Sprintf("        COMPREPLY=( $(compgen -W \"$GOARGS\" -- $cur) )  # THIS WORKS\n")
	out += fmt.Sprintf("	return 0\n")
	out += fmt.Sprintf("}\n")
	out += fmt.Sprintf("complete -F _%s_complete %s\n", argname, argname)
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("# copy and paste the above into your bash shell should work\n")
	return out
}

func getParentProcessName() string {
	ppid := os.Getppid()
	// On Linux, the command name is in /proc/<pid>/comm
	commPath := fmt.Sprintf("/proc/%d/comm", ppid)
	content, err := ioutil.ReadFile(commPath)
	if err != nil {
		return "unknown"
	}
	// The file content has a trailing newline, so trim it.
	return strings.TrimSpace(string(content))
}

/*

  This script will be placed in a directory in your $fpath (e.g., ~/.zsh/completions/_my-app).

#compdef my-app

# This function will be called by Zsh to get the completions.
_my_app_completions() {
  local -a suggestions

  # Here is the key part:
  # We execute our Go program with the hidden flag and capture its output.
    9   # The `(f)` flag splits the output by line into an array.
   10   suggestions=( ${(f)"$(my-app --_generate_completions)"} )
   11
   12   # Pass the suggestions to the Zsh completion engine.
   13   _describe 'command' suggestions
   14 }
   15
   16 # Tell Zsh to call our function when completing for my-app
   17 _my_app_completions "$@"
*/

// zsh:
/*
#compdef forge

# Zsh completion function for the 'forge' command.

_forge_completions() {
  local -a words
  local -i CURRENT

  # Zsh's equivalent of Bash's COMP_WORDS and COMP_CWORD
  words=("${(@)words}")
  CURRENT=$CURRENT

  # Generate the completion suggestions by calling the forge command.
  # The output is split into an array.
  local -a suggestions
  suggestions=("${(@f)$(forge --auto-complete "'${words[CURRENT]}'" "${words[@]}")}")

  # Pass the suggestions to the Zsh completion system.
  _describe 'completions' suggestions
}

# Register the function to be called for the 'forge' command.
_forge_completions "$@"

*/