package gojs

import (
	"apigo.cloud/git/apigo/plugin"
	"apigo.cloud/git/apigo/qjs"
	"errors"
	"fmt"
	"github.com/ssgo/log"
	"github.com/ssgo/u"
	"regexp"
	"strings"
)

var pluginNameMatcher = regexp.MustCompile(`(\w+?)\.`)

type JSRuntime struct {
	freeJsValues []quickjs.Value
	rt           quickjs.Runtime
	JsCtx        *quickjs.Context
	GoCtx        *plugin.Context
	logger       *log.Logger
	plugins      map[string]*plugin.Plugin
}

func (rt *JSRuntime) Close() {
	for _, v := range rt.freeJsValues {
		v.Free()
	}
	rt.freeJsValues = make([]quickjs.Value, 0)
	rt.JsCtx.Close()
	rt.rt.Close()
}

func (rt *JSRuntime) initCode(code string) {
	tryPlugins := map[string]bool{}
	for _, m := range pluginNameMatcher.FindAllStringSubmatch(code, 1024) {
		tryPlugins[m[1]] = true
	}

	for _, plg := range plugin.List() {
		if tryPlugins[plg.Id] && rt.plugins[plg.Id] == nil {
			rt.plugins[plg.Id] = &plg
			rt.JsCtx.Globals().Set(plg.Id, MakeJsValueForPlugin(rt.GoCtx, plg.Objects, plg.Id, false))
			if plg.JsCode != "" {
				if result, err := rt.JsCtx.Eval(plg.JsCode); err != nil {
					stack := GetJSError(err, plg.JsCode)
					rt.logger.Error(err.Error(), "stack", stack)
				} else {
					result.Free()
				}
			}
		}
	}
}

func (rt *JSRuntime) run(code string) (out interface{}, err error, stack string) {
	if r, err := rt.JsCtx.Eval(code); err == nil {
		result := MakeFromJsValue(r)
		r.Free()
		return result, nil, ""
	} else {
		// 检查错误
		stack := GetJSError(err, code)
		rt.logger.Error(err.Error(), "stack", stack)
		return nil, err, stack
	}
}

func (rt *JSRuntime) Exec(code string) (err error, stack string) {
	rt.initCode(code)
	_, err, stack = rt.run(code)
	return err, stack
}

func (rt *JSRuntime) Run(code string) (out interface{}, err error, stack string) {
	rt.initCode(code)
	return rt.run("(function(){" + code + "})()")
}

func SetPluginsConfig(conf map[string]plugin.Config) {
	for _, plg := range plugin.List() {
		if plg.Init != nil {
			plg.Init(conf[plg.Id])
		}
	}
}

func New(globals map[string]interface{}, logger *log.Logger) *JSRuntime {
	if logger == nil {
		logger = log.DefaultLogger
	}

	// 初始化JS虚拟机
	jsRt := quickjs.NewRuntime()
	jsCtx := jsRt.NewContext()
	goCtx := plugin.NewContext(map[string]interface{}{
		"*log.Logger":      logger,
		"*quickjs.Context": jsCtx,
	})

	rt := &JSRuntime{
		freeJsValues: make([]quickjs.Value, 0),
		rt:           jsRt,
		JsCtx:        jsCtx,
		GoCtx:        goCtx,
		logger:       logger,
		plugins:      map[string]*plugin.Plugin{},
	}

	rt.GoCtx.SetData("_freeJsValues", &rt.freeJsValues)

	// 全局变量
	if globals != nil {
		for k, obj := range globals {
			rt.JsCtx.Globals().Set(k, MakeJsValue(rt.GoCtx, obj, false))
		}
	}

	// 注入 console
	rt.JsCtx.Globals().Set("console", MakeJsValue(rt.GoCtx, map[string]interface{}{
		"log": func(args ...interface{}) {
			fmt.Println(args...)
		},
		"info": func(args ...interface{}) {
			fmt.Println(u.Cyan(fmt.Sprintln(args...)))
		},
		"warn": func(args ...interface{}) {
			fmt.Println(u.BYellow(fmt.Sprintln(args...)))
		},
		"error": func(args ...interface{}) {
			fmt.Println(u.BRed(fmt.Sprintln(args...)))
		},
	}, false))

	return rt
}

func Run(code string, globals map[string]interface{}, logger *log.Logger) (out interface{}, err error, stack string) {
	rt := New(globals, logger)
	defer func() {
		if err := recover(); err != nil {
			rt.logger.Error(u.String(err))
		}
		rt.Close()
	}()
	return rt.Run(code)
}

var jsErrorCodeMatcher = regexp.MustCompile(`code:(\d+)`)

func GetJSError(err error, code string) string {
	if err != nil {
		var jsErr *quickjs.Error
		if errors.As(err, &jsErr) {
			// 在错误信息中加入代码
			codeLines := strings.Split(code, "\n")
			return jsErrorCodeMatcher.ReplaceAllStringFunc(jsErr.Stack, func(s2 string) string {
				errorLineNumber := u.Int(jsErrorCodeMatcher.FindStringSubmatch(s2)[1])
				errorLine := ""
				if len(codeLines) >= errorLineNumber {
					errorLine = codeLines[errorLineNumber-1]
				}
				return s2 + " ```" + errorLine + "```"
			})
		} else {
			return err.Error()
		}
	} else {
		return ""
	}
}