package gojs

import (
	"apigo.cloud/git/apigo/plugin"
	"github.com/ssgo/u"
	"path"
	"reflect"
	"regexp"
	"runtime"
	"strings"
)

type ArgInfo struct {
	index       int
	isVariadic  bool
	isOutArg    bool
	isFunc      bool
	isSkip      bool
	isOptional  bool
	funcInArgs  []ArgInfo
	funcOutArgs []ArgInfo
	Name        string
	Type        string
}

var numberMatcher = regexp.MustCompile("[a-z0-9]*(int|float)[a-z0-9]*")
var mapMatcher = regexp.MustCompile("map\\[(\\w+)](\\w+)")

func makeArgTypeString(argType string) string {
	if strings.Contains(argType, "interface {}") {
		argType = strings.ReplaceAll(argType, "interface {}", "any")
	}
	if strings.HasPrefix(argType, "*") {
		argType = argType[1:]
	}
	if strings.HasPrefix(argType, "[]") {
		argType = argType[2:] + "[]"
	}
	if strings.Contains(argType, "int") || strings.Contains(argType, "float") {
		argType = numberMatcher.ReplaceAllString(argType, "number")
	}
	if strings.Contains(argType, "bool") {
		argType = strings.ReplaceAll(argType, "bool", "boolean")
	}
	if strings.Contains(argType, "booleanean") {
		argType = strings.ReplaceAll(argType, "booleanean", "boolean")
	}
	if strings.HasPrefix(argType, "map[") {
		argType = mapMatcher.ReplaceAllString(argType, "Map<$1, $2>")
	}
	//if strings.ContainsRune(argType, '.') {
	//	argType = argType[strings.LastIndexByte(argType, '.')+1:]
	//}
	return argType
}

func (argInfo *ArgInfo) String() string {
	argType := argInfo.Type
	if argInfo.isFunc {
		argType = "(" + makeInArgsString(argInfo.funcInArgs) + ") => " + makeOutArgsString(argInfo.funcOutArgs)
	} else {
		argType = makeArgTypeString(argType)
	}
	if argInfo.isOutArg {
		return argType
	} else {
		argName := argInfo.Name
		if argName == "" {
			argName = "arg" + u.String(argInfo.index+1)
		}
		if argInfo.isVariadic {
			argName = "..." + argName
		}
		return argName + u.StringIf(argInfo.isOptional, "?: ", ": ") + argType
	}
}

func makeInArgs(args []ArgInfo) []string {
	arr := make([]string, 0)
	for _, arg := range args {
		if !arg.isSkip {
			arr = append(arr, arg.String())
		}
	}
	return arr
}

func makeInArgsString(args []ArgInfo) string {
	return strings.Join(makeInArgs(args), ", ")
}

func makeOutArgsString(args []ArgInfo) string {
	arr := makeInArgs(args)
	if len(arr) == 0 {
		return "void"
	} else if len(arr) == 1 {
		return arr[0]
	} else {
		return "[" + strings.Join(arr, ", ") + "]"
	}
}

func makeFuncArgsNames(v reflect.Value, inArgs []ArgInfo, isMethod bool) {
	fp := runtime.FuncForPC(v.Pointer())
	file, lineNo := fp.FileLine(fp.Entry())
	if file != "<autogenerated>" && u.FileExists(file) {
		lines, _ := u.ReadFileLines(file)
		if len(lines) >= lineNo {
			line := lines[lineNo-1]
			if !strings.Contains(line, "func") && lineNo-2 >= 0 && strings.Contains(lines[lineNo-2], "func") {
				line = lines[lineNo-2]
			}
			line = strings.ReplaceAll(line, "interface{}", "any")
			pos := strings.Index(line, "func")
			if pos != -1 {
				line = strings.TrimSpace(line[pos+4:])
				if isMethod {
					// skip method this arg
					pos = strings.Index(line, "(")
					if pos != -1 {
						line = strings.TrimSpace(line[pos+1:])
						makeFuncArgsName(line, inArgs[1:])
					}
				} else {
					makeFuncArgsName(line, inArgs)
				}
			}
		}
	}
}

func makeFuncArgsName(line string, inArgs []ArgInfo) {
	pos := strings.Index(line, "(")
	if pos != -1 {
		line = strings.TrimSpace(line[pos+1:])
		for i := 0; i < len(inArgs); i++ {
			// find param name
			pos = strings.Index(line, " ")
			// support combined args a, b string
			pos1 := strings.Index(line, ",")
			if pos1 != -1 && pos1 < pos {
				inArgs[i].Name = line[0:pos1]
				line = strings.TrimSpace(line[pos1+1:])
				continue
			}
			if pos != -1 {
				inArgs[i].Name = line[0:pos]
				line = strings.TrimSpace(line[pos+1:])
			}
			// skip inline func
			if strings.HasPrefix(line, "func") {
				line = strings.TrimSpace(line[4:])
				leftQuotes := 0
				quoteStarted := false
				for pos = 0; pos < len(line); pos++ {
					if line[pos] == '(' {
						leftQuotes++
						quoteStarted = true
						continue
					}
					if quoteStarted && line[pos] == ')' {
						leftQuotes--
					}
					if quoteStarted && leftQuotes == 0 {
						break
					}
				}
				makeFuncArgsName(line, inArgs[i].funcInArgs)
				line = strings.TrimSpace(line[pos+1:])
			}
			// skip ,
			pos = strings.Index(line, ",")
			if pos != -1 {
				line = strings.TrimSpace(line[pos+1:])
			}
		}
	}
}

func makeFieldElemType(t reflect.Type, existsClasses *map[string]bool, classes *[]string, isSkip bool) string {
	originT := t
	if t.Kind() == reflect.Pointer {
		t = t.Elem()
	}
	if t.Kind() == reflect.Map {
		if t.Elem().Kind() == reflect.Struct && !isSkip {
			makeClass(t.Elem(), existsClasses, classes)
		}
		et := t.Elem()
		if et.Kind() == reflect.Pointer {
			et = et.Elem()
		}
		if et.Kind() == reflect.Struct || et.Kind() == reflect.Map || (et.Kind() == reflect.Slice && et.Elem().Kind() != reflect.Uint8) {
			return "Map<" + makeArgTypeString(t.Key().String()) + ", " + makeFieldElemType(t.Elem(), existsClasses, classes, isSkip) + ">"
		}
		return "Object"
	} else if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
		if t.Elem().Kind() == reflect.Struct && !isSkip {
			makeClass(t.Elem(), existsClasses, classes)
		}
		return "Array<" + makeFieldElemType(t.Elem(), existsClasses, classes, isSkip) + ">"
	} else if t.Kind() == reflect.Struct {
		if !isSkip {
			makeClass(originT, existsClasses, classes)
		}
		return makeArgTypeString(t.Name())
	} else {
		return makeArgTypeString(t.String())
	}
}

func makeClass(t reflect.Type, existsClasses *map[string]bool, classes *[]string) {
	originT := t
	if t.Kind() == reflect.Pointer {
		t = t.Elem()
	}
	if !(*existsClasses)[t.Name()] {
		(*existsClasses)[t.Name()] = true
		classItems := make([]string, 0)
		implements := make([]string, 0)
		for i := 0; i < t.NumField(); i++ {
			if !t.Field(i).IsExported() {
				continue
			}
			ft := t.Field(i).Type
			if ft.Kind() == reflect.Pointer {
				ft = ft.Elem()
			}
			ftStr := makeFieldElemType(ft, existsClasses, classes, false)
			if t.Field(i).Anonymous {
				implements = append(implements, ftStr)
				continue
			}
			classItems = append(classItems, "  "+u.GetLowerName(t.Field(i).Name)+": "+ftStr)
		}
		for i := 0; i < originT.NumMethod(); i++ {
			if !originT.Method(i).IsExported() {
				continue
			}
			inArgs, outArgs := makeFuncInOutArgs(originT.Method(i).Type, existsClasses, classes)
			if len(inArgs) > 0 {
				inArgs[0].isSkip = true
			}
			makeFuncArgsNames(originT.Method(i).Func, inArgs, true)
			classItems = append(classItems, "  "+u.GetLowerName(originT.Method(i).Name)+"("+makeInArgsString(inArgs)+"): "+makeOutArgsString(outArgs))
		}
		implementsStr := ""
		if len(implements) > 0 {
			implementsStr = " extends " + strings.Join(implements, ", ")
		}
		newClass := append([]string{}, "interface "+t.Name()+implementsStr+" {")
		newClass = append(newClass, classItems...)
		newClass = append(newClass, "}")
		*classes = append(*classes, strings.Join(newClass, "\n"))
	}
}

func makeFuncInOutArgs(t reflect.Type, existsClasses *map[string]bool, classes *[]string) (inArgs []ArgInfo, outArgs []ArgInfo) {
	inArgs = make([]ArgInfo, t.NumIn())
	outArgs = make([]ArgInfo, t.NumOut())
	// *plugin.Context
	for i := t.NumIn() - 1; i >= 0; i-- {
		arg := t.In(i)
		isSkip := false
		if arg.String() == "*plugin.Context" {
			isSkip = true
		}
		argInfo := ArgInfo{
			index:      i,
			isOutArg:   false,
			isFunc:     false,
			isSkip:     isSkip,
			isOptional: arg.Kind() == reflect.Pointer,
			isVariadic: t.IsVariadic() && i == t.NumIn()-1,
			Name:       "",
			Type:       makeFieldElemType(arg, existsClasses, classes, isSkip),
		}
		//originArg := arg
		//if arg.Kind() == reflect.Pointer {
		//	arg = arg.Elem()
		//}
		if arg.Kind() == reflect.Func {
			argInfo.isFunc = true
			argInfo.funcInArgs, argInfo.funcOutArgs = makeFuncInOutArgs(arg, existsClasses, classes)
		}
		//if !argInfo.isSkip && arg.Kind() == reflect.Struct {
		//	makeClass(originArg, existsClasses, classes)
		//}
		inArgs[i] = argInfo
	}
	for i := t.NumOut() - 1; i >= 0; i-- {
		arg := t.Out(i)
		isSkip := false
		if arg.String() == "error" {
			isSkip = true
		}
		argInfo := ArgInfo{
			index:      i,
			isOutArg:   true,
			isFunc:     false,
			isSkip:     isSkip,
			isVariadic: false,
			Name:       "",
			Type:       makeFieldElemType(arg, existsClasses, classes, isSkip),
		}
		//originArg := arg
		//if arg.Kind() == reflect.Pointer {
		//	arg = arg.Elem()
		//}
		//if !argInfo.isSkip && arg.Kind() == reflect.Struct {
		//	makeClass(originArg, existsClasses, classes)
		//}
		outArgs[i] = argInfo
	}
	return inArgs, outArgs
}

func findObject(v reflect.Value, level int, existsClasses *map[string]bool) (codes []string, classes []string) {
	codes = make([]string, 0)
	classes = make([]string, 0)
	if v.Kind() == reflect.Interface {
		v = v.Elem()
	}
	originT := v.Type()
	v = u.FinalValue(v)
	t := originT
	if t.Kind() == reflect.Pointer {
		t = t.Elem()
	}
	indent := strings.Repeat("  ", level)
	if t.Kind() == reflect.Map {
		codes = append(codes, "{")
		for _, k := range v.MapKeys() {
			codes2, classes2 := findObject(v.MapIndex(k), level+1, existsClasses)
			classes = append(classes, classes2...)
			codes = append(codes, indent+"  \""+k.String()+"\": "+strings.Join(codes2, "\n")+",")
		}
		codes = append(codes, indent+"}")
	} else if t.Kind() == reflect.Struct {
		makeClass(originT, existsClasses, &classes)
		codes = append(codes, "null as "+t.Name())
	} else if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
		codes = append(codes, "[")
		for i := 0; i < v.Len(); i++ {
			codes2, classes2 := findObject(v.Index(i), level+1, existsClasses)
			classes = append(classes, classes2...)
			codes = append(codes, indent+"  "+strings.Join(codes2, "\n")+",")
		}
		codes = append(codes, indent+"]")
	} else if t.Kind() == reflect.Func {
		inArgs, outArgs := makeFuncInOutArgs(t, existsClasses, &classes)
		makeFuncArgsNames(v, inArgs, false)
		codes = append(codes, "function ("+makeInArgsString(inArgs)+"): "+makeOutArgsString(outArgs)+" {return}")
	} else {
		codes = append(codes, u.Json(v.Interface()))
	}
	return codes, classes
}

func MakeAllPluginCode() {
	for _, plg := range plugin.List() {
		code := MakePluginCode(&plg)
		_ = u.WriteFile(path.Join("plugins", plg.Id+".ts"), code)
	}
}

func MakePluginCode(plg *plugin.Plugin) string {
	if plg == nil {
		return ""
	}
	existsClasses := make(map[string]bool)
	codes, classes := findObject(reflect.ValueOf(plg.Objects), 0, &existsClasses)
	return strings.Join(classes, "\n\n") + "\n\nexport default " + strings.Join(codes, "\n")
}