package cli

import (
	"github.com/shylinux/icebergs"
	"github.com/shylinux/toolkits"

	"bytes"
	"fmt"
	"os"
	"os/exec"
	"os/user"
	"path"
	"runtime"
)

var Index = &ice.Context{Name: "cli", Help: "命令模块",
	Caches: map[string]*ice.Cache{},
	Configs: map[string]*ice.Config{
		ice.CLI_RUNTIME: {Name: "runtime", Help: "运行环境", Value: kit.Dict()},
	},
	Commands: map[string]*ice.Command{
		ice.ICE_INIT: {Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			m.Cmd(ice.CTX_CONFIG, "load", "cli.json")

			m.Conf(ice.CLI_RUNTIME, "host.GOARCH", runtime.GOARCH)
			m.Conf(ice.CLI_RUNTIME, "host.GOOS", runtime.GOOS)
			m.Conf(ice.CLI_RUNTIME, "host.pid", os.Getpid())

			if name, e := os.Hostname(); e == nil {
				m.Conf(ice.CLI_RUNTIME, "boot.hostname", kit.Select(name, os.Getenv("HOSTNAME")))
			}
			if user, e := user.Current(); e == nil {
				m.Conf(ice.CLI_RUNTIME, "boot.username", path.Base(kit.Select(user.Name, os.Getenv("USER"))))
			}
			if name, e := os.Getwd(); e == nil {
				m.Conf(ice.CLI_RUNTIME, "boot.pathname", path.Base(kit.Select(name, os.Getenv("PWD"))))
			}

			m.Conf(ice.CLI_RUNTIME, "node.type", kit.MIME_WORKER)
			m.Conf(ice.CLI_RUNTIME, "node.name", m.Conf(ice.CLI_RUNTIME, "boot.pathname"))
			m.Log("info", "runtime %v", kit.Formats(m.Confv(ice.CLI_RUNTIME)))
		}},
		ice.ICE_EXIT: {Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			m.Cmd(ice.CTX_CONFIG, "save", "cli.json", ice.CLI_RUNTIME)
		}},
		ice.CLI_RUNTIME: {Name: "runtime", Help: "运行环境", Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
		}},
		ice.CLI_SYSTEM: {Name: "system", Help: "系统命令", Hand: func(m *ice.Message, c *ice.Context, key string, arg ...string) {
			cmd := exec.Command(arg[0], arg[1:]...)

			// 运行目录
			cmd.Dir = m.Option("cmd_dir")
			m.Info("dir: %s", cmd.Dir)

			// 环境变量
			env := kit.Simple(m.Optionv("cmd_env"))
			for i := 0; i < len(env)-1; i += 2 {
				cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", env[i], env[i+1]))
			}
			m.Info("env: %s", cmd.Env)

			if m.Option("cmd_type") == "daemon" {
				// 守护进程
				m.Gos(m, func(m *ice.Message) {
					if e := cmd.Start(); e != nil {
						m.Warn(e != nil, "%v start: %s", arg, e)
					} else if e := cmd.Wait(); e != nil {
						m.Warn(e != nil, "%v wait: %s", arg, e)
					} else {
						m.Info("%v exit", arg)
					}
				})
			} else {
				// 系统命令
				out := bytes.NewBuffer(make([]byte, 0, 1024))
				err := bytes.NewBuffer(make([]byte, 0, 1024))
				cmd.Stdout = out
				cmd.Stderr = err
				if e := cmd.Run(); e != nil {
					m.Warn(e != nil, "%v run: %s", arg, kit.Select(e.Error(), err.String()))
				} else {
					m.Echo(out.String())
				}
				m.Push("code", int(cmd.ProcessState.ExitCode()))
			}
		}},
	},
}

func init() { ice.Index.Register(Index, nil) }