package main

import (
	"fmt"
	"io"

	"go.wit.com/log"
)

// generates Find()

// but really it has Append(), Delete() and some other stuff

func (msg *MsgName) getLockname(s string) string {
	// leave this function stubbed in for development of autogenpb
	//	if argv.Mutex {
	//		// use the mutex lock from the modified protoc.pb.go file
	//		return s + ".Lock"
	//		// return s // causes Marshal() to panic? always use the variable name 'Lock'?
	//	}
	// a single global lock by struct name
	return msg.Lockname
}

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

	fmt.Fprintln(w, "// find a dependancy by the go path")
	fmt.Fprintln(w, "func (x *"+FRUIT+") FindBy"+COLOR+"(s string) *"+APPLE+" {")
	fmt.Fprintln(w, "	if x == nil {")
	fmt.Fprintln(w, "		return nil")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	"+LOCK+".RLock()")
	fmt.Fprintln(w, "	defer "+LOCK+".RUnlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	for i, _ := range x."+APPLES+" {")
	fmt.Fprintln(w, "		if x."+APPLES+"[i]."+COLOR+" == s {")
	fmt.Fprintln(w, "			return x."+APPLES+"[i]")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "	return nil")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")
}

// I like these functions the best.
func (msg *MsgName) simpleAppend(w io.Writer, FRUIT, APPLES, APPLE string) {
	LOCK := msg.getLockname("x")

	log.Printf("\t\t(x %s) APPEND(%s)\n", FRUIT, APPLE)
	// append -- no check at all
	fmt.Fprintln(w, "// just a simple Append() shortcut (but still uses the mutex lock)")
	fmt.Fprintln(w, "func (x *"+FRUIT+") Append(y *"+APPLE+") {")
	fmt.Fprintln(w, "	"+LOCK+".Lock()")
	fmt.Fprintln(w, "	defer "+LOCK+".Unlock()")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	x."+APPLES+" = append(x."+APPLES+", y)")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")
}

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

	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, "")
	fmt.Fprintln(w, "	for _, p := range x."+APPLES+" {")
	for _, COLOR := range COLORS {
		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, "// 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, "")
}

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

	fmt.Fprintln(w, "func (x *"+FRUIT+") DeleteBy"+COLOR+"(s string) bool {")
	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]."+COLOR+" == 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, "")
}

// 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 string) {
	LOCK := msg.getLockname("x")

	fmt.Fprintln(w, "// TESTING fails with 'go vet' warning")
	fmt.Fprintln(w, "func (x *"+FRUIT+") DeleteBy"+COLOR+"(s string) *"+APPLE+" {")
	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]."+COLOR+" == 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, "")
}

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

	fmt.Fprintln(w, "// useful? remindme:1y")
	fmt.Fprintln(w, "// returns an "+APPLE+" if "+COLOR+" matches, otherwise create")
	fmt.Fprintln(w, "func (x *"+FRUIT+") InsertBy"+COLOR+" (y string) *"+APPLE+" {")
	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+" == y {")
	fmt.Fprintln(w, "			return p")
	fmt.Fprintln(w, "		}")
	fmt.Fprintln(w, "	}")
	fmt.Fprintln(w, "")
	fmt.Fprintln(w, "	z := new("+APPLE+")")
	fmt.Fprintln(w, "	z."+COLOR+" = y")
	fmt.Fprintln(w, "	x."+APPLES+" = append(x."+APPLES+", z)")
	fmt.Fprintln(w, "	return z")
	fmt.Fprintln(w, "}")
	fmt.Fprintln(w, "")
}