package main

import (
	"fmt"
	"io"
)

func (msg *MsgName) getLockname(s string) string {
	if argv.Mutex {
		// use the mutex lock from the modified protoc.pb.go file
		return s + ".Lock"
	}
	// a single global lock by struct name
	return msg.Lockname
}

func (msg *MsgName) appendUnique(w io.Writer, FRUIT, APPLES, APPLE string, COLORS []string) {
	LOCK := msg.getLockname("x")

	fmt.Fprintln(w, "// TESTING")
	fmt.Fprintln(w, "// enforces "+APPLE+" is unique in "+FRUIT+"."+APPLES)
	fmt.Fprintln(w, "func (x *"+FRUIT+") AppendUnique(newP *"+APPLE+") bool {")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	for _, COLOR := range COLORS {
		fmt.Fprintln(w, "	for _, p := range x."+APPLES+" {")
		fmt.Fprintln(w, "		if p."+COLOR+" == newP."+COLOR+" {")
		fmt.Fprintln(w, "			return false")
		fmt.Fprintln(w, "		}")
		fmt.Fprintln(w, "	}")
	}
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	x."+APPLES+" = append(x."+APPLES+", newP)")
	fmt.Fprintln(w, "	return true")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")
}

func (msg *MsgName) appendUniqueBy(w io.Writer, FRUIT, APPLES, APPLE, COLOR string) {
	LOCK := msg.getLockname("x")

	fmt.Fprintln(w, "// TESTING")
	fmt.Fprintln(w, "// enforces "+APPLE+"."+COLOR+" is unique in "+FRUIT+"."+APPLES)
	fmt.Fprintln(w, "func (x *"+FRUIT+") AppendUniqueBy"+COLOR+"(newP *"+APPLE+") bool {")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	for _, p := range x."+APPLES+" {")
	fmt.Fprintln(w, "		if p."+COLOR+" == newP."+COLOR+" {")
	fmt.Fprintln(w, "			return false")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	x."+APPLES+" = append(x."+APPLES+", newP)")
	fmt.Fprintln(w, "	return true")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")
}