package prep

// initializes logging and command line options

import (
	"fmt"
	"os"
	"strings"

	"go.wit.com/log"
)

func parseArgv(argname string) *Auto {
	pb := new(Auto)
	pb.Argname = argname
	if len(os.Args) == 0 {
		return pb
	}

	if len(os.Args) > 1 && os.Args[1] == "--bash" {
		pb.SetupAuto = true
		return pb
	}

	// HACK: set debug flag if --autodebug is passed
	for _, s := range os.Args {
		if s == "--autodebug" {
			pb.Debug = true
		}
	}

	if len(os.Args) > 1 && os.Args[1] == pb.Argname {
		pb.IsAuto = true
		parts := strings.Split(os.Getenv("COMP_LINE"), " ")
		pb.Debug = true
		log.Fprintf(os.Stderr, "\n")
		pb.Debugf("MATCH Partial os.Args=%v COMP_LINE=%v", os.Args, os.Getenv("COMP_LINE"))
		// log.Fprintf(os.Stdout, "jcarr")
		if len(parts) > 0 {
			pb.Arg0 = parts[0]
		}
		pb.Arg1 = os.Args[1]
		os.Exit(0)
	}

	if len(os.Args) > 1 && os.Args[1] == "--version" {
		if myAuto.buildtime != nil {
			// if binary defined buildtime() then process standard version output here
			doVersion(pb)
			os.Exit(0)
		}
	}
	if len(os.Args) == 0 {
		return pb
	}

	if len(os.Args) == 1 {
		pb.Arg0 = os.Args[0]
		return pb
	}
	if os.Args[1] != "--auto-complete" {
		pb.Cmd = os.Args[1]
		return pb
	}

	// should we do auto complete here?
	if len(os.Args) > 1 && os.Args[1] == "--auto-complete" {
		pb.IsAuto = true
		pb.Arg0 = os.Args[0]
		pb.Arg1 = os.Args[1]
		pb.Partial = os.Args[2]
		pb.Arg3 = os.Args[3]
		if len(os.Args) < 5 {
			// the user is doing autocomplete on the command itself
			pb.Partial = ""
			pb.Cmd = ""
			pb.Argv = []string{""}
			return pb
		}
		if pb.Partial == "''" {
			pb.Partial = ""
		}
		// pb.Argv = os.Args[4:]
		for _, s := range os.Args[4:] {
			if s == "--autodebug" {
				continue
			}
			tmp := strings.Trim(pb.Partial, "'")
			if tmp == s {
				// don't put pb.Partial into Argv
				continue
			}
			pb.Argv = append(pb.Argv, s)
		}
		// set pb.Cmd to the first thing that doesn't have a '-' arg
		for _, s := range pb.Argv {
			if strings.HasPrefix(s, "-") {
				continue
			}
			pb.Cmd = s
			break
		}
		if pb.Partial == "'"+pb.Cmd+"'" {
			// not really a command, it's just a partially inputed string from the user
			pb.Cmd = ""
		}
		// try to figure out what the last argv is
		for _, s := range pb.Argv {
			p := fmt.Sprintf("'%s'", s)
			if pb.Partial == p {
				pb.Debugf("DEBUG: Last argv MATCHES Partial %s %s", s, p)
				continue
			} else {
				pb.Debugf("DEBUG: Last argv DOES NOT MATCH Partial %s %s", s, p)
			}
			pb.Last = s
			if strings.HasPrefix(s, "-") {
				// skip args like -test --verbose when sending subcommands to go-args for help text
				continue
			}
			pb.Goargs = append(pb.Goargs, s)
		}
		// if pb.Cmd == "" {
		// 	pb.Cmd = strings.Join(pb.Argv, "BLAH")
		// }
	}
	return pb
}