package main

import (
	"fmt"
	"os"
	"strings"
)

/*
	handles shell autocomplete
*/

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

func (args) doBashAuto() {
	argv.doBashHelp()
	switch argv.BashAuto[0] {
	case "list":
		fmt.Println("--all --mine --favorites --private")
	case "debian":
		fmt.Println("--dry-run")
	case "upgrade":
		fmt.Println("--dry-run")
	case "build":
		fmt.Println("--verbose")
	case "install":
		fmt.Println("--verbose")
	case "repomap-clone":
		fmt.Println("--repomap")
	default:
		if strings.HasSuffix(argv.BashAuto[0], ARGNAME) {
			// list the subcommands here
			fmt.Println("--bash list build debian install repomap-clone upgrade")
		}
	}
	os.Exit(0)
}

// prints help to STDERR // TODO: move everything below this to go-args
func (args) doBashHelp() {
	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.argpp.WriteHelp(os.Stderr)
		// return
	}
	fmt.Fprintln(os.Stderr, "")
	fmt.Fprintln(os.Stderr, "list:           show every package on mirrors.wit.com")
	fmt.Fprintln(os.Stderr, "build:          go build every package that identifies as a binary")
	fmt.Fprintln(os.Stderr, "install:        go install every package into ~/go/bin")
	fmt.Fprintln(os.Stderr, "repomap-clone:  go-clone every package from a gowebd repomap")
	fmt.Fprintln(os.Stderr, "")
}

// complete -F forge --bash forge
func (args) doBash() {
	fmt.Println("# add this in your bashrc:")
	fmt.Println("")
	fmt.Println("# todo: add this to go-arg as a 'hidden' go-arg option --bash")
	fmt.Println("#")
	fmt.Println("# todo: make this output work/parse with:")
	fmt.Println("# complete -C " + ARGNAME + " --bash go")
	fmt.Println("")
	fmt.Println("_" + ARGNAME + "_complete()")
	fmt.Println("{")
	fmt.Println("	# sets local to this func vars")
	fmt.Println("	local cur prev all")
	fmt.Println("	cur=${COMP_WORDS[COMP_CWORD]}")
	fmt.Println("	prev=${COMP_WORDS[COMP_CWORD-1]}")
	fmt.Println("	all=${COMP_WORDS[@]}")
	fmt.Println("")
	fmt.Println("	# this is where we generate the go-arg output")
	fmt.Println("        GOARGS=$(" + ARGNAME + " --auto-complete $prev \\'$cur\\' $all)")
	fmt.Println("")
	fmt.Println("	# this compares the command line input from the user")
	fmt.Println("	# to whatever strings we output")
	fmt.Println("        COMPREPLY=( $(compgen -W \"$GOARGS\" -- $cur) )  # THIS WORKS")
	fmt.Println("	return 0")
	fmt.Println("}")
	fmt.Println("complete -F _" + ARGNAME + "_complete " + ARGNAME)
	fmt.Println("")
	fmt.Println("# copy and paste the above into your bash shell should work")
	os.Exit(0)
}