package main

import (
	"fmt"
	"io"
)

// generate Delete() functions

func (msg *MsgName) addDeleteFunc(w io.Writer, FRUIT, APPLES, APPLE string) string {
	LOCK := msg.getLockname("x")
	funcdef := "func (x *" + FRUIT + ") Delete(y *" + APPLE + ") bool"

	fmt.Fprintln(w, funcdef, "{")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	for i, _ := range x."+APPLES+" {")
	fmt.Fprintln(w, "		if x."+APPLES+"[i] == y {")
	fmt.Fprintln(w, "			x."+APPLES+"[i] = x."+APPLES+"[len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			x."+APPLES+" = x."+APPLES+"[:len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			return true")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "	return false")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")

	return funcdef
}

func (msg *MsgName) deleteBy(w io.Writer, FRUIT, APPLES, APPLE, COLOR, FUNCNAME, VARNAME string) string {
	LOCK := msg.getLockname("x")
	funcdef := "func (x *" + FRUIT + ") " + FUNCNAME + "(s string) bool"

	fmt.Fprintln(w, funcdef, "{")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	for i, _ := range x."+APPLES+" {")
	fmt.Fprintln(w, "		if x."+APPLES+"[i]."+VARNAME+" == s {")
	fmt.Fprintln(w, "			x."+APPLES+"[i] = x."+APPLES+"[len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			x."+APPLES+" = x."+APPLES+"[:len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			return true")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "	return false")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")

	return funcdef
}

// this tries to return the deleted one but is wrong/gives warning if mutex lock is in struct
func (msg *MsgName) deleteByWithCopy(w io.Writer, FRUIT, APPLES, APPLE, COLOR, FUNCNAME, VARNAME string) string {
	LOCK := msg.getLockname("x")

	funcdef := "func (x *" + FRUIT + ") " + FUNCNAME + "(s string) *" + APPLE

	fmt.Fprintln(w, "// TESTING fails with 'go vet' warning")
	fmt.Fprintln(w, funcdef, "{")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	var newr "+APPLE)
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	for i, _ := range x."+APPLES+" {")
	fmt.Fprintln(w, "		if x."+APPLES+"[i]."+VARNAME+" == s {")
	fmt.Fprintln(w, "			newr = *x."+APPLES+"[i]")
	fmt.Fprintln(w, "			x."+APPLES+"[i] = x."+APPLES+"[len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			x."+APPLES+" = x."+APPLES+"[:len(x."+APPLES+")-1]")
	fmt.Fprintln(w, "			return &newr")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "	return nil")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")

	return funcdef
}