package main

import (
	"fmt"
	"os"
)

/*
	this parses the command line arguements using alex flint's go-arg
*/

var argv args

type args struct {
	Checkout *CheckoutCmd `arg:"subcommand:checkout"                  help:"switch git branches"`
	Config   *ConfigCmd   `arg:"subcommand:config"                    help:"show your .config/forge/ settings"`
	Dirty    *EmptyCmd    `arg:"subcommand:dirty"                     help:"check if your git repos are dirty"`
	GitReset *EmptyCmd    `arg:"subcommand:hard-reset"                help:"hard reset your user git branches"`
	List     *FindCmd     `arg:"subcommand:list"                      help:"just show a table of the current state"`
	Patch    *PatchCmd    `arg:"subcommand:patch"                     help:"examine and make patch sets"`
	GitPull  *FindCmd     `arg:"subcommand:pull"                      help:"run 'git pull'"`
	Rescan   *EmptyCmd    `arg:"subcommand:rescan"                    help:"recreate the git protobuf repos.pb file"`
	URL      string       `arg:"--connect"                            help:"gowebd url"`
	Bash     bool         `arg:"--bash"                               help:"generate bash completion"`
	BashAuto []string     `arg:"--auto-complete"                      help:"does the actual autocompletion"`
}

type EmptyCmd struct {
}

type PatchCmd struct {
	List *EmptyCmd `arg:"subcommand:list"          help:"list available patches"`
	Show *EmptyCmd `arg:"subcommand:show"          help:"show a specific patch"`
}

type ConfigAddCmd struct {
	Path        string `arg:"--path"                            help:"absolute path of the git repo"`
	GoPath      string `arg:"--gopath"                          help:"GO path of the git repo"`
	Directory   bool   `arg:"--directory"    default:"false"    help:"repo is a directory to match against"`
	ReadOnly    bool   `arg:"--readonly"     default:"false"    help:"repo is readonly"`
	Writable    bool   `arg:"--writable"     default:"false"    help:"repo is writable"`
	Favorite    bool   `arg:"--favorite"     default:"false"    help:"forge will always go-clone or git clone this"`
	Private     bool   `arg:"--private"      default:"false"    help:"repo can not be published"`
	Interesting bool   `arg:"--interesting"  default:"false"    help:"something you decided was cool"`
	Master      string `arg:"--master"                          help:"the git 'master' or 'main' branch name"`
	Devel       string `arg:"--devel"                           help:"the git devel branch name"`
	User        string `arg:"--user"                            help:"the git user branch name"`
}

type ConfigCmd struct {
	Add      *ConfigAddCmd `arg:"subcommand:add"                      help:"add a config setting"`
	Fix      *EmptyCmd     `arg:"subcommand:fix"                      help:"fix .config/forge/ and/or repos.pb protobuf file"`
	List     *EmptyCmd     `arg:"subcommand:list"                     help:"list your config settings"`
	Delete   string        `arg:"--delete"                            help:"delete this repo"`
	Register string        `arg:"--register"                          help:"register your git URL (foo.com/mystuff) or (github.com/foo/bar)"`
}

type CheckoutCmd struct {
	User   *FindCmd `arg:"subcommand:user"                      help:"git checkout user"`
	Devel  *FindCmd `arg:"subcommand:devel"                     help:"git checkout devel"`
	Master *FindCmd `arg:"subcommand:master"                    help:"git checkout master"`
}

type FindCmd struct {
	All       bool `arg:"--all"                           help:"select every repo (the default)"`
	Mine      bool `arg:"--mine"                          help:"your repos as defined in the forge config"`
	Favorites bool `arg:"--favorites"                     help:"your repos configured as favorites"`
	Private   bool `arg:"--private"                       help:"your private repos from your .config/forge/"`
	Dirty     bool `arg:"--dirty"                         help:"only use dirty git repos"`
	// ReadOnly  bool `arg:"--readonly"                      help:"include read-only repos"`
}

func (args) Version() string {
	return "forge " + VERSION + "    Built on " + BUILDTIME
}

func (a args) Description() string {
	return `
forge -- in the spirit of things like sourceforge

	This supports GO projects so far.
		It will work from ~/go/src or where your go.work file is.
		Since I mostly use ~/go/src, that has been tested more.

Examples:
	forge                                        # opens the GUI
	forge list                                   # show every repo state
	forge dirty                                  # check for dirty git repos
	forge pull                                   # run 'git pull' in every repo
	forge checkout                               # switch git branches

	forge config add --private --path /opt/bob   # add a private repo /opt/bob
	forge config add --directory --writable \
		--gopath 'go.wit.com/user/bob'       # directory contains r/w repos
	forge config add --private --writeable \
		--gopath 'go.wit.com/user/bob/work'  # a GO repo that can not be published

	`
}

// prints help to STDERR
func (args) doBashHelp() {
	name := "forge"
	if argv.BashAuto[1] != "''" {
		// if this is not blank, then the user has typed something
		return
	}
	if argv.BashAuto[0] != name {
		// if this is not the name of the command, the user already started doing something
		return
	}
	if argv.BashAuto[0] == name {
		me.pp.WriteHelp(os.Stderr)
		return
	}
	fmt.Fprintln(os.Stderr, "")
	fmt.Fprintln(os.Stderr, "hello world")
	fmt.Fprintln(os.Stderr, "")
}

func (args) doBashHelpDebug() {
	fmt.Fprintln(os.Stderr, "")
	fmt.Fprintln(os.Stderr, "hello world")
	var more string
	p0 := "0" + argv.BashAuto[0]
	p1 := "1" + argv.BashAuto[1]
	p2 := "2" + argv.BashAuto[2]
	if len(argv.BashAuto[1]) >= 0 {
		more = "more"
	} else {
		more = "less"
	}
	p1a := fmt.Sprintf("1a.%s.%+v.\n", argv.BashAuto[1], len(argv.BashAuto[1]))
	fmt.Fprintln(os.Stderr, "pull something else", argv.BashAuto, len(argv.BashAuto), p0, p1, p2, p1a, "end", more)
	fmt.Fprintln(os.Stderr, "")
}

func (args) doBashAuto() {
	name := "forge"
	argv.doBashHelp()
	switch argv.BashAuto[0] {
	case "checkout":
		fmt.Println("user devel master")
	case "config":
		fmt.Println("add fix list delete")
	case "list":
		fmt.Println("--all --mine --favorites --private")
	case "pull":
		fmt.Println("--all --mine --favorites --private")
	case "patch":
		fmt.Println("--list --submit --show")
	case "dirty":
	case "user":
	case "devel":
	case "master":
	default:
		if argv.BashAuto[0] == name {
			// list the subcommands here
			fmt.Println("--bash checkout config dirty hard-reset list patch pull rescan")
		}
	}
	os.Exit(0)
}

// complete -F forge --bash forge
func (args) doBash() {
	name := "forge"
	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 " + name + " --bash go")
	fmt.Println("")
	fmt.Println("_" + name + "_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=${COMP_WORDS[@]}")
	fmt.Println("")
	fmt.Println("	# this is where we generate the go-arg output")
	fmt.Println("        GOARGS=$(" + name + " --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 _" + name + "_complete " + name)
	fmt.Println("")
	fmt.Println("# copy and paste the above into your bash shell should work")
	os.Exit(0)
}