package main

import (
	_ "embed"
	"fmt"
	"github.com/ssgo/u"
	"io"
	"os"
	"os/exec"
	"path"
	"path/filepath"
	"regexp"
	"strings"
	"text/template"
)

var version = "v0.0.6"

//go:embed templates/_makePluginCode.go
var makePluginCodeTPL string

//go:embed templates/_main.go
var mainCodeTPL string

//go:embed templates/_main_test.go
var mainTestCodeTPL string

//go:embed templates/_main.js
var mainJSCodeTPL string

//go:embed templates/_plugin.go
var pluginCodeTPL string

//go:embed templates/_plugin_test.go
var pluginTestCodeTPL string

//go:embed templates/_plugin_test.js
var pluginTestJSCodeTPL string

//go:embed templates/_gitignore
var gitignoreTPL string

//go:embed templates/_gitignore_server
var gitignoreServerTPL string

type Command struct {
	Name      string
	ShortName string
	Args      string
	Comment   string
	Func      func([]string)
}

var commands = []Command{
	{"new", "+", "[name]", "create a new project, will create in the current directory if no name is specified", newProject},
	{"new plugin", "+p", "[name]", "create a new plugin project, will create in the current directory if no name is specified", newPluginProject},
	//{"new server", "+s", "[name]", "create a new server project, will create in the current directory if no name is specified", newServerProject},
	//{"new api", "+a", "[path] [method]", "create a new api for server project, will use restful api if specified http method", newServerAPI},
	//{"new game", "+g", "[name]", "create a new game project, will create in the current directory if no name is specified", newServerProject},
	//{"new webkit", "+w", "[name]", "create a new webkit project, will create in the current directory if no name is specified", newServerProject},
	//{"download", "dl", "[plugin name]", "will fetch plugin into project", downloadPlugin},
	{"run", "r", "", "will exec `go run .`", runProject},
	{"watch run", "rr", "[...]", "run project use gowatch, if project files changed will restart auto, ... args see gowatch help https://github.com/ssgo/tool", devProject},
	{"test", "t", "", "will exec `go test -v .`, will exec into tests if exists tests dir", testProject},
	{"watch test", "tt", "[...]", "test project use gowatch, if project files changed will restart auto, ... args see gowatch help https://github.com/ssgo/tool", devTestProject},
	//{"export plugins", "ep", "", "export typescript code for used plugins into \"plugins/\"", makePluginCode},
	{"tidy", "td", "", "tidy project, find imported plugins from .js files add import code to jsImports.go, export typescript code for used plugins into \"plugins/\"", tidy},
	//{"git login", "/lg", "", "login to apigo.cloud/git", },
	//{"git new", "/+", "name", "create new public repository from apigo.cloud/git", },
	//{"git new pri", "/++", "name", "create new private repository from apigo.cloud/git", },
	//{"git clone", "/cl", "name", "clone repository to current dir from apigo.cloud/git", },
	//{"git list", "/l", "", "list current repository tags from apigo.cloud/git", },
	//{"git commit", "/c", "comment", "commit current repository to apigo.cloud/git", },
	//{"git tag", "/t", "tag", "create new tag for current repository and push to apigo.cloud/git", },
	//{"build", "b", "[-m]", "build for current os, output to build/, -m will mix js files into exec file", },
	//{"build mac", "bm", "", "build", },
	//{"build macarm", "bma", "", "build", },
	//{"build win", "bw", "", "build", },
	//{"build win32", "bw32", "", "build", },
	//{"build linux", "bl", "", "build", },
	//{"build linuxarm", "bla", "", "build", },
	//{"build all", "ba", "", "build", },
	//{"publish", "p", "", "publish project to target server", },
	// TODO 从 apigo.cloud/git 中读取信息增加命令，例如：server
	// TODO 从 plugins 中读取信息增加命令，例如：dao
}

func findTool() (goWatchPath string, logVPath string) {
	goWatchPath = "gowatch"
	logVPath = "logv"
	if binPath, err := exec.LookPath("gowatch"); err == nil && binPath != "" {
		goWatchPath = binPath
	}
	if binPath, err := exec.LookPath("logv"); err == nil && binPath != "" {
		logVPath = binPath
	}
	return goWatchPath, logVPath
}

func checkSSGOTool() {
	goWatchPath, logVPath := findTool()
	if goWatchPath == "gowatch" || logVPath == "logv" {
		_ = runCommand("go", "get", "-u", "github.com/ssgo/tool")
		if goWatchPath == "gowatch" {
			_ = runCommand("go", "install", "github.com/ssgo/tool/gowatch")
		}
		if logVPath == "logv" {
			_ = runCommand("go", "install", "github.com/ssgo/tool/logv")
		}
	}
}

func checkProjectPath(args []string) string {
	if len(args) > 0 {
		if err := os.Mkdir(args[0], 0755); err != nil {
			fmt.Println(u.BRed("mkdir error: " + err.Error()))
			return ""
		}
		if err := os.Chdir(args[0]); err != nil {
			fmt.Println(u.BRed("chdir error: " + err.Error()))
			return ""
		}
		return args[0]
	} else {
		if pathname, err := os.Getwd(); err != nil {
			fmt.Println(u.BRed("getwd error: " + err.Error()))
			return ""
		} else {
			return path.Base(pathname)
		}
	}
}

func newProject(args []string) {
	if name := checkProjectPath(args); name != "" {
		_ = runCommand("go", "mod", "init", name)
		_ = runCommand("go", "mod", "edit", "-go=1.18")
		_ = runCommand("go", "get", "-u", "apigo.cloud/git/apigo/gojs")
		_ = runCommand("go", "get", "-u", "apigo.cloud/git/apigo/plugins")
		writeFile("main.go", mainCodeTPL, map[string]any{"name": name})
		writeFile("main_test.go", mainTestCodeTPL, map[string]any{"name": name})
		writeFile("main.js", mainJSCodeTPL, map[string]any{"name": name})
		writeFile(".gitignore", gitignoreTPL, map[string]any{"name": name})
		_ = runCommand("go", "mod", "tidy")
		checkSSGOTool()
		fmt.Println(u.BGreen("new project " + name + " created"))
	}
}

func newPluginProject(args []string) {
	if name := checkProjectPath(args); name != "" {
		_ = runCommand("go", "mod", "init", name)
		_ = runCommand("go", "mod", "edit", "-go=1.18")
		_ = runCommand("go", "get", "-u", "apigo.cloud/git/apigo/plugin")
		writeFile("plugin.go", pluginCodeTPL, map[string]any{"name": name})
		writeFile(".gitignore", gitignoreTPL, map[string]any{"name": name})
		_ = runCommand("go", "mod", "tidy")
		_ = os.Mkdir("tests", 0755)
		_ = os.Chdir("tests")
		_ = runCommand("go", "mod", "init", "tests")
		_ = runCommand("go", "mod", "edit", "-go=1.18")
		_ = runCommand("go", "mod", "edit", "-require=current-plugin@v0.0.0")
		_ = runCommand("go", "mod", "edit", "-replace=current-plugin@v0.0.0=../")
		_ = runCommand("go", "get", "-u", "apigo.cloud/git/apigo/plugin")
		_ = runCommand("go", "get", "-u", "apigo.cloud/git/apigo/gojs")
		writeFile("plugin_test.go", pluginTestCodeTPL, map[string]any{"name": name})
		writeFile("plugin_test.js", pluginTestJSCodeTPL, map[string]any{"name": name})
		_ = runCommand("go", "mod", "tidy")
		checkSSGOTool()
		fmt.Println(u.BGreen("new plugin " + name + " created"))
	}
}

func newServerProject(args []string) {
}

func newServerAPI(args []string) {
}

func _runProject(args []string, isWatch bool) {
	_ = runCommand("go", "mod", "tidy")
	goBinPath, logVPath := findTool()
	if isWatch {
		args = append(args, "-pt", ".go,.js,.yml", "run", ".")
	} else {
		goBinPath = "go"
		args = append(args, "run", ".")
	}
	_ = runCommandPipe(logVPath, goBinPath, args...)
}

func runProject(args []string) {
	_runProject(args, false)
}

func devProject(args []string) {
	_runProject(args, true)
}

func testProject(args []string) {
	_testProject(args, false)
}

func devTestProject(args []string) {
	_testProject(args, true)
}

func _testProject(args []string, isWatch bool) {
	if u.FileExists("tests") {
		if u.FileExists(filepath.Join("tests", "go.mod")) {
			_ = os.Chdir("tests")
			if isWatch {
				args = append(args, "-p", "..")
			}
			isRun := false
			for _, f := range u.ReadDirN(".") {
				if strings.HasSuffix(f.Name, ".go") {
					goStr := u.ReadFileN(f.FullName)
					if strings.Contains(goStr, "package main") && !strings.Contains(goStr, "package main_test") {
						isRun = true
					}
					break
				}
			}
			if !isRun {
				args = append(args, "test", "-v", ".")
			} else {
				args = append(args, "run", ".")
			}
		} else {
			args = append(args, "test", "-v", "tests")
		}
	} else {
		args = append(args, "test", "-v", ".")
	}
	_ = runCommand("go", "mod", "tidy")
	goWatchPath, logVPath := findTool()
	if isWatch {
		args2 := append([]string{"-pt", ".go,.js,.yml"}, args...)
		_ = runCommandPipe(logVPath, goWatchPath, args2...)
	} else {
		_ = runCommandPipe(logVPath, "go", args...)
	}
}

var pkgMatcher = regexp.MustCompile(`(?im)^\s*(import)?\s*_\s+"([\w-_/.]+)"`)
var importMatcher = regexp.MustCompile(`(?im)^\s*import\s+([\w{}, ]+)\s+from\s+['"]([\w./\\\- ]+)['"]`)

func makeJsImports(path string, jsImports *[]string, pkgName string) {
	if u.FileExists(filepath.Join(path, "go.mod")) {
		if m := modNameMatcher.FindStringSubmatch(u.ReadFileN(filepath.Join(path, "go.mod"))); m != nil {
			if pkgName != m[1] {
				return
			}
		}
	}
	for _, f := range u.ReadDirN(path) {
		filename := f.Name
		fullName := filepath.Join(path, filename)
		if !strings.HasPrefix(filename, ".") && !strings.HasPrefix(filename, "_") && filename != "_makePluginCode" && filename != "node_modules" && filename != "www" && filename != "src" {
			if f.IsDir {
				makeJsImports(fullName, jsImports, pkgName)
			} else if strings.HasSuffix(filename, ".js") {
				if code, err := u.ReadFile(fullName); err == nil {
					for _, m := range importMatcher.FindAllStringSubmatch(code, 1024) {
						if !strings.HasPrefix(m[2], ".") && !strings.HasPrefix(m[2], "_") && m[2] != "current-plugin" && m[2] != "console" && m[2] != "logger" {
							if !u.FileExists(filepath.Join(path, m[2])) {
								*jsImports = u.AppendUniqueString(*jsImports, m[2])
							}
						}
					}
				}
			}
		}
	}
}

func makePluginCodeImports(from string, imports *[]string, parentModuleName string) {
	jsImports := make([]string, 0)
	currentParentModuleName := parentModuleName
	if u.FileExists(filepath.Join(from, "go.mod")) {
		pkgName := ""
		if m := modNameMatcher.FindStringSubmatch(u.ReadFileN(filepath.Join(from, "go.mod"))); m != nil {
			pkgName = m[1]
		}
		makeJsImports(from, &jsImports, pkgName)
		parentModuleName = pkgName
	}

	currentPkgName := ""
	for _, f := range u.ReadDirN(from) {
		if f.IsDir {
			if !strings.HasPrefix(f.Name, ".") {
				makePluginCodeImports(filepath.Join(from, f.Name), imports, parentModuleName)
			}
		} else {
			if strings.HasSuffix(f.Name, ".go") && !strings.HasPrefix(f.Name, ".") && f.Name != "makePluginCode.go" {
				if code, err := u.ReadFile(filepath.Join(from, f.Name)); err == nil {
					if m := pkgNameMatcher.FindStringSubmatch(code); m != nil {
						currentPkgName = m[1]
					}
					for _, m := range pkgMatcher.FindAllStringSubmatch(code, 1024) {
						if m[2] != "current-plugin" && !strings.HasPrefix(f.Name, "jsImports") {
							*imports = u.AppendUniqueString(*imports, m[2])
						}
					}
				}
			}
		}
	}

	if currentPkgName != "" && u.FileExists(filepath.Join(from, "go.mod")) {
		pkgList := make([]string, 0)
		for _, plgPkg := range jsImports {
			if plgPkg != currentParentModuleName && !u.StringIn(*imports, plgPkg) {
				pkgList = append(pkgList, plgPkg)
				*imports = u.AppendUniqueString(*imports, plgPkg)
			}
		}
		if len(pkgList) > 0 {
			_ = u.WriteFile(filepath.Join(from, u.StringIf(strings.HasSuffix(currentPkgName, "_test"), "jsImports_test.go", "jsImports.go")), `package `+currentPkgName+`
import _ "`+strings.Join(pkgList, "\"\nimport _ \"")+`"
`)
		}
	}
}

func writeFile(filename string, fileContent string, data any) {
	if fp, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0600); err == nil {
		tpl, _ := template.New(filename).Parse(fileContent)
		if err = tpl.Execute(fp, data); err != nil {
			fmt.Println(u.Red(err.Error()))
		}
		_ = fp.Close()
	} else {
		fmt.Println(u.Red(err.Error()))
	}
}

var replaceMatcher = regexp.MustCompile(`([a-zA-Z0-9._\-/]+)\s+(v[0-9.]+)\s+=>\s+([a-zA-Z0-9._\-/\\]+)`)
var modNameMatcher = regexp.MustCompile(`(?m)^module\s+([a-zA-Z0-9._\-/]+)$`)
var pkgNameMatcher = regexp.MustCompile(`(?m)^package\s+([a-zA-Z0-9._\-/]+)$`)

func tidy(args []string) {
	// 判断是否可执行项目（不创建指向项目本身的 import _）
	isMainProject := false
	isEmptyProject := true
	if files, err := os.ReadDir("."); err == nil {
		for _, f := range files {
			if !f.IsDir() && strings.HasSuffix(f.Name(), ".go") {
				isEmptyProject = false
				code, _ := u.ReadFile(f.Name())
				if strings.Contains(code, "package main") || strings.Contains(code, "func main(") {
					isMainProject = true
					break
				}
			}
		}
	}

	// 扫描用到的插件（import _）
	imports := make([]string, 0)
	makePluginCodeImports(".", &imports, "")

	findGoModCode, _ := u.ReadFile("go.mod")
	goModCode := "module main\ngo 1.18\n"
	currentModuleName := "current-project"
	if !isMainProject {
		if m := modNameMatcher.FindStringSubmatch(findGoModCode); m != nil {
			currentModuleName = m[1]
		}
		goModCode += "require " + currentModuleName + " v0.0.0 // indirect\nreplace " + currentModuleName + " v0.0.0 => ../\n"
	}

	// 扫描 replace，处理路径后加入到 _makePluginCode/go.mod
	for _, m := range replaceMatcher.FindAllStringSubmatch(findGoModCode, 100) {
		replacePath := m[3]
		if absPath, err := filepath.Abs(m[3]); err == nil {
			replacePath = absPath
		}
		goModCode += fmt.Sprintln("replace", m[1], m[2], "=>", replacePath)
	}

	if !isMainProject && !isEmptyProject {
		imports = append(imports, currentModuleName)
	}

	_ = u.WriteFile("_makePluginCode/go.mod", goModCode)
	writeFile("_makePluginCode/main.go", makePluginCodeTPL, map[string]any{"imports": imports})
	_ = os.Chdir("_makePluginCode")
	defer func() {
		_ = os.Chdir("..")
		_ = os.RemoveAll("_makePluginCode")
	}()
	_ = runCommand("go", "mod", "tidy")
	if err := runCommand("go", "run", "."); err != nil {
		fmt.Println(u.Red(err.Error()))
	}
}

func runCommand(name string, args ...string) error {
	cmd := exec.Command(name, args...)
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	return cmd.Run()
}

func runCommandPipe(pipeCommandName, commandName string, args ...string) error {
	cmd1 := exec.Command(commandName, args...)
	cmd2 := exec.Command(pipeCommandName)

	r, w := io.Pipe()
	wClosed := false
	defer func() {
		if !wClosed {
			w.Close()
		}
	}()
	cmd1.Stdin = os.Stdin
	cmd1.Stdout = w
	cmd1.Stderr = w
	cmd2.Stdin = r
	cmd2.Stdout = os.Stdout
	cmd2.Stderr = os.Stderr
	if err := cmd2.Start(); err != nil {
		return err
	}
	if err := cmd1.Start(); err != nil {
		return err
	}
	if err := cmd1.Wait(); err != nil {
		return err
	}
	w.Close()
	wClosed = true
	// 等待第二个命令完成
	if err := cmd2.Wait(); err != nil {
		return err
	}
	return nil
}

func main() {
	if len(os.Args) > 1 {
		cmd1 := os.Args[1]
		cmd2 := cmd1
		if len(os.Args) > 2 {
			cmd2 += " " + os.Args[2]
		}
		for _, cmdInfo := range commands {
			if cmd1 == cmdInfo.Name || cmd1 == cmdInfo.ShortName {
				cmdInfo.Func(os.Args[2:])
				return
			} else if cmd2 == cmdInfo.Name {
				cmdInfo.Func(os.Args[3:])
				return
			}
		}
	}

	fmt.Println("tools for apigo.cloud")
	fmt.Println("version ", version)
	fmt.Println()
	fmt.Println("Usage:")
	fmt.Println(" ", u.Cyan("ag [command] [...]"))
	fmt.Println(" ", u.Magenta("ag [short command] [...]"))
	fmt.Println()
	fmt.Println("Commands:")
	for _, cmdInfo := range commands {
		padStr := ""
		padN := 30 - len(cmdInfo.Name) - len(cmdInfo.ShortName) - len(cmdInfo.Args)
		if padN > 0 {
			padStr = strings.Repeat(" ", padN)
		}
		fmt.Println(" ", u.Cyan(cmdInfo.Name), u.Dim("[")+u.Magenta(cmdInfo.ShortName)+u.Dim("]"), cmdInfo.Args, padStr, cmdInfo.Comment)
	}
	fmt.Println()
	fmt.Println("Examples:")
	fmt.Println(" ", u.Magenta("ag +"), "          create a new simple project with Hello World")
	fmt.Println(" ", u.Magenta("ag +p ali"), "     create a new plugin project named ali for use aliyun services")
	fmt.Println()
}