// Copyright 2013 bee authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.

package main

import (
	"io/ioutil"
	"os"
	path "path/filepath"
	"runtime"
	"strings"
)

var cmdRun = &Command{
	UsageLine: "run [appname] [watchall] [-main=*.go] [-downdoc=true]  [-gendoc=true]",
	Short:     "run the app and start a Web server for development",
	Long: `
Run command will supervise the file system of the beego project using inotify,
it will recompile and restart the app after any modifications.

`,
}

var mainFiles ListOpts

var downdoc docValue
var gendoc docValue

func init() {
	cmdRun.Run = runApp
	cmdRun.Flag.Var(&mainFiles, "main", "specify main go files")
	cmdRun.Flag.Var(&gendoc, "gendoc", "auto generate the docs")
	cmdRun.Flag.Var(&downdoc, "downdoc", "auto download swagger file when not exist")
}

var appname string

func runApp(cmd *Command, args []string) int {
	exit := make(chan bool)
	crupath, _ := os.Getwd()

	if len(args) == 0 || args[0] == "watchall" {
		appname = path.Base(crupath)
		ColorLog("[INFO] Uses '%s' as 'appname'\n", appname)
	} else {
		appname = args[0]
	}
	Debugf("current path:%s\n", crupath)

	err := loadConfig()
	if err != nil {
		ColorLog("[ERRO] Fail to parse bee.json[ %s ]\n", err)
	}

	var paths []string

	readAppDirectories(crupath, &paths)

	// Because monitor files has some issues, we watch current directory
	// and ignore non-go files.
	gps := GetGOPATHs()
	if len(gps) == 0 {
		ColorLog("[ERRO] Fail to start[ %s ]\n", "$GOPATH is not set or empty")
		os.Exit(2)
	}
	gopath := gps[0]
	for _, p := range conf.DirStruct.Others {
		paths = append(paths, strings.Replace(p, "$GOPATH", gopath, -1))
	}

	files := []string{}
	for _, arg := range mainFiles {
		if len(arg) > 0 {
			files = append(files, arg)
		}
	}

	if gendoc == "true" {
		NewWatcher(paths, files, true)
		Autobuild(files, true)
	} else {
		NewWatcher(paths, files, false)
		Autobuild(files, false)
	}
	if downdoc == "true" {
		if _, err := os.Stat(path.Join(crupath, "swagger")); err != nil {
			if os.IsNotExist(err) {
				downloadFromUrl(swaggerlink, "swagger.zip")
				unzipAndDelete("swagger.zip", "swagger")
			}
		}
	}
	for {
		select {
		case <-exit:
			runtime.Goexit()
		}
	}
	return 0
}

func readAppDirectories(directory string, paths *[]string) {
	fileInfos, err := ioutil.ReadDir(directory)
	if err != nil {
		return
	}

	useDirectory := false
	for _, fileInfo := range fileInfos {
		if strings.HasSuffix(fileInfo.Name(), "docs") {
			continue
		}
		if fileInfo.IsDir() == true && fileInfo.Name()[0] != '.' {
			readAppDirectories(directory+"/"+fileInfo.Name(), paths)
			continue
		}

		if useDirectory == true {
			continue
		}

		if path.Ext(fileInfo.Name()) == ".go" {
			*paths = append(*paths, directory)
			useDirectory = true
		}
	}

	return
}