package main

import (
	"fmt"
	"os/exec"

	"github.com/go-cmd/cmd"
	"github.com/google/uuid"
	"go.wit.com/log"
	"golang.org/x/text/cases"
	"golang.org/x/text/language"
)

// This was just going to be a function to print the results to stdout

// print the protobuf in human form
func (pf *File) printMsgTable() error {
	pf.Bases.printMsg()
	pf.Base.printMsg()

	// everything else
	for _, msg := range pf.MsgNames {
		msg.printMsg()
	}

	log.Printf("\n")
	log.Printf("      %-2s %20s %20s %20s %20s\n", "", "PARENT STRUCT", "VAR STRUCT TYPE", "VAR NAME", "LOCK")
	// for i, s := range slices.Backward(pf.ToSort) {
	for i, s := range pf.ToSort {
		var funcname string
		STRUCT := s.MsgName
		CHILD := s.VarType
		VARNAME := s.VarName
		LOCK := s.Lockname

		log.Printf("SORT: %-2d %20s %20s %20s %20s %s\n", i, STRUCT, CHILD, VARNAME, LOCK, "")

		var FUNCTYPE string
		if STRUCT == VARNAME {
			FUNCTYPE = STRUCT
		} else {
			FUNCTYPE = VARNAME
		}

		if s.VarType+"s" == s.VarName {
			funcname = "func (x *" + FUNCTYPE + ") All() *[]iter" + s.VarType
		} else {
			funcname = "func (x *" + FUNCTYPE + ") all" + s.VarName + "() *[]iter" + s.VarType
		}
		log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
		msg := pf.findMsg(s.VarType)
		if msg == nil {
			return fmt.Errorf("failed to find struct %s", s.VarType)
		}
		for _, v := range msg.Vars {
			if v.HasSort {
				funcname := "func (x *" + FUNCTYPE + ") SortBy" + v.VarName + "(" + v.VarType + ") *[]iter" + s.VarType
				log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
			}
		}

		var ucount int
		for _, v := range msg.Vars {
			if v.HasUnique {
				ucount += 1
				funcname := "func (x *" + FUNCTYPE + ") AppendUnique" + v.VarName + "(" + v.VarType + ")"
				log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
			}
		}
		for _, v := range msg.Vars {
			if v.HasUnique {
				funcname := "func (x *" + FUNCTYPE + ") DeleteBy" + v.VarName + "(" + v.VarType + ") bool"
				log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
			}
		}

		for _, v := range msg.Vars {
			if v.HasUnique {
				funcname = "func (x *" + FUNCTYPE + ") FindBy" + v.VarName + "(a " + v.VarType + ") *" + s.VarType + "(using" + v.VarName + ")"
				log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
			} else {
				if v.VarType == "string" {
					funcname = "func (x *" + FUNCTYPE + ") FindBy" + v.VarName + "(a string) []*" + s.VarType + "  ???"
					log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
				}
			}
		}
		if ucount == 1 {
			for _, v := range msg.Vars {
				if !v.HasUnique {
					continue
				}
				funcname = "func (x *" + FUNCTYPE + ") Insert(a *" + v.VarType + ") (*" + CHILD + ", isNew bool)"
				log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
			}
		}
		if ucount > 1 {
			funcname = "func (x *" + FUNCTYPE + ") Insert(a *" + CHILD + ") (*" + CHILD + ", isNew bool)"
			log.Printf("      %-2s %20s %20s %20s %s %s\n", "", "", "", "", "", funcname)
		}

	}
	return nil
}

func (msg *MsgName) printMsg() {
	var s string
	if msg.DoMutex {
		s += "(mutex) "
	}
	if msg.DoMarshal {
		s += "(marshal) "
	}
	log.Printf("%s %s\n", msg.Name, s)

	for _, v := range msg.Vars {
		var end string
		if v.IsRepeated {
			end += "(repeated) "
		}
		if v.HasSort {
			end += "(sort) "
		}
		if v.HasUnique {
			end += "(unique) "
		}
		log.Printf("\t%s %s %s\n", v.VarName, v.VarType, end)
	}
}

func checkCmd(cmd string) {
	// path, err := exec.LookPath(cmd)
	_, err := exec.LookPath(cmd)
	if err != nil {
		// fmt.Printf("\n%s is not in the PATH\n", cmd)
		userInstructions()
		log.Sleep(2)
	} else {
		// fmt.Printf("%s is available at %s\n", cmd, path)
	}
}

func (pf *File) noPluralMessage() {
	base := cases.Title(language.English, cases.NoLower).String(pf.Filebase)

	log.Info("")
	log.Info("###########################################################################")
	log.Info("Your proto file", pf.Filename, "does not contain the correct 'message' definitions")
	log.Info("")
	log.Info("For autogenpb to work on your file", pf.Filename, ", you must have both names exactly:")
	log.Info("")
	log.Printf("message %s {\n", base)
	log.Info("}")
	log.Printf("message %s {\n", base+"s")
	log.Info("}")
	log.Info("")
	log.Info("###########################################################################")
	badExit(fmt.Errorf("proto file error %s", pf.Filename))
}

// message Fruits {	        	// `autogenpb:marshal` `autogenpb:mutex`
// 	string   uuid	        = 1;    // `autogenpb:uuid:be926ad9-f07f-484c-adf2-d96eeabf3079`
// 	string   version        = 2;    // `autogenpb:version:v0.0.1`
// 	repeated Fruit Fruits   = 3;    // THIS MUST BE "Fruit" and then "Fruit" + "s"
// }

func (pf *File) noUuid() {
	base := cases.Title(language.English, cases.NoLower).String(pf.Filebase)
	id := uuid.New()

	log.Info("")
	log.Info("###########################################################################")
	log.Info("Your proto file", pf.Filename, "is incorrect for 'message' ", base+"s")
	log.Info("")
	log.Info("For autogenpb to work on your file", pf.Filename, ",", base+"s must be exactly:")
	log.Info("")
	log.Info("message", base+"s", "{	        	// `autogenpb:marshal` `autogenpb:mutex`")
	log.Info(" 	string   uuid	        = 1;    // `autogenpb:uuid:" + id.String() + "`")
	log.Info(" 	string   version        = 2;    // `autogenpb:version:v0.0.1`")
	log.Info(" 	repeated", base, base+"s", "   = 3;    // THIS MUST BE ", base, " and then ", base+"s")
	log.Info("}")
	log.Info("")
	log.Info("If you don't have a UUID, you can use the randomly generated one here")
	log.Info("")
	log.Info("###########################################################################")
	badExit(fmt.Errorf("proto file error %s", pf.Filename))
}

func userNotes(result cmd.Status) error {
	log.Info("protoc failed", result.Cmd, "with", result.Exit)
	for _, line := range result.Stdout {
		log.Info("STDOUT:", line)
	}
	for _, line := range result.Stderr {
		log.Info("STDERR:", line)
	}
	userInstructions()
	return fmt.Errorf("protoc failed with %d %v", result.Exit, result.Error)
}

func userInstructions() {
	log.Info("This is likely because you don't have protoc and protoc-gen-go installed")
	log.Info("")
	log.Info("On debian, you can:")
	log.Info("   apt install protobuf-compiler   # for protoc")
	log.Info("   apt install protoc-gen-go       # for protoc-gen-go")
	log.Info("")
}