// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0

package main

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

	"go.wit.com/lib/gui/shell"
)

/*
	handles shell autocomplete
*/

// used for shell auto completion
// var ARGNAME string = "forge" // todo: get this from $0 ?

func deleteMatch() {
	// f := forgedb.InitSimple()
	fmt.Println("go.wit.com/lib/gui/repostatus todo: need to do this")
}

func (args) doBashAuto() {
	argv.doBashHelp()
	switch argv.BashAuto[0] {
	case "dump":
		fmt.Println("--terminals")
	default:
		if argv.BashAuto[0] == ARGNAME {
			// list the subcommands here
			fmt.Println("--restore save dump dumpx")
		}
	}
	os.Exit(0)
}

// prints help to STDERR // TODO: move everything below this to go-args
func (args) doBashHelp() {
	if len(argv.BashAuto) < 2 {
		fmt.Fprintf(os.Stderr, "something went wrong with the GO args autocomplete in %s\n", ARGNAME)
		return
	}
	if argv.BashAuto[1] != "''" {
		// if this is not blank, then the user has typed something
		return
	}
	if argv.BashAuto[0] != ARGNAME {
		// if this is not the name of the command, the user already started doing something
		return
	}
	if argv.BashAuto[0] == ARGNAME {
		me.pp.WriteHelp(os.Stderr)
		return
	}
	fmt.Fprintln(os.Stderr, "")
	fmt.Fprintln(os.Stderr, "something went wrong with the GO args package")
	fmt.Fprintln(os.Stderr, "")
}

// complete -F forge --bash forge
func (args) doBash() {
	if homeDir, err := os.UserHomeDir(); err == nil {
		filename := filepath.Join(homeDir, ".local/share/bash-completion/completions", ARGNAME)
		if !shell.Exists(filename) {
			if f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err == nil {
				f.Write([]byte(makeBashCompletionText(ARGNAME)))
				f.Close()
			}
		}
	}
	fmt.Println(makeBashCompletionText(ARGNAME))
}

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 " + argname + " --bash go\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("_" + argname + "_complete()\n")
	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=${COMP_WORDS[@]}\n")
	out += fmt.Sprintf("\n")
	out += fmt.Sprintf("	# this is where we generate the go-arg output\n")
	out += fmt.Sprintf("        GOARGS=$(" + argname + " --auto-complete $prev \\'$cur\\' $all)\n")
	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
}