package cli

import (
	"bytes"
	"io"
	"os"
	"os/exec"
	"strings"

	ice "shylinux.com/x/icebergs"
	"shylinux.com/x/icebergs/base/ctx"
	"shylinux.com/x/icebergs/base/mdb"
	kit "shylinux.com/x/toolkits"
)

func _system_show(m *ice.Message, cmd *exec.Cmd) {
	// 输入流
	if r, ok := m.Optionv(CMD_INPUT).(io.Reader); ok {
		cmd.Stdin = r
	}

	// 输出流
	if w, ok := m.Optionv(CMD_OUTPUT).(io.Writer); ok {
		cmd.Stdout, cmd.Stderr = w, w
		if w, ok := m.Optionv(CMD_ERRPUT).(io.Writer); ok {
			cmd.Stderr = w
		}
	} else {
		out := bytes.NewBuffer(make([]byte, 0, ice.MOD_BUFS))
		err := bytes.NewBuffer(make([]byte, 0, ice.MOD_BUFS))
		defer func() {
			m.Push(CMD_OUT, out.String())
			m.Push(CMD_ERR, err.String())
			m.Echo(kit.Select(out.String(), err.String()))
		}()

		cmd.Stdout, cmd.Stderr = out, err
	}

	// 执行命令
	if e := cmd.Run(); e != nil {
		m.Warn(e != nil, cmd.Args, " ", e.Error())
	} else {
		m.Cost("code", cmd.ProcessState.ExitCode(), "args", cmd.Args)
	}

	m.Push(kit.MDB_TIME, m.Time())
	m.Push(CMD_CODE, int(cmd.ProcessState.ExitCode()))
}
func SystemProcess(m *ice.Message, text string, arg ...string) {
	if len(arg) > 0 && arg[0] == RUN {
		m.Cmdy(SYSTEM, arg[1:])
		return
	}

	m.Cmdy(ctx.COMMAND, SYSTEM)
	m.ProcessField(SYSTEM, RUN)
	m.Push(ARG, kit.Split(text))
}
func IsSuccess(m *ice.Message) bool {
	return m.Append(CMD_CODE) == "0"
}

const (
	CMD_DIR  = "cmd_dir"
	CMD_ENV  = "cmd_env"
	CMD_TYPE = "cmd_type"

	CMD_INPUT  = "cmd_input"
	CMD_OUTPUT = "cmd_output"
	CMD_ERRPUT = "cmd_errput"

	CMD_CODE = "cmd_code"
	CMD_ERR  = "cmd_err"
	CMD_OUT  = "cmd_out"
)

const (
	GOARCH  = "goarch"
	GOOS    = "goos"
	LINUX   = "linux"
	DARWIN  = "darwin"
	WINDOWS = "windows"
	AMD64   = "amd64"
	I386    = "i386"
	ARM     = "arm"

	SOURCE = "source"
	TARGET = "target"

	USER = "USER"
	HOME = "HOME"
	PATH = "PATH"
)
const SYSTEM = "system"

func init() {
	Index.Merge(&ice.Context{Configs: map[string]*ice.Config{
		SYSTEM: {Name: SYSTEM, Help: "系统命令", Value: kit.Data()},
	}, Commands: map[string]*ice.Command{
		SYSTEM: {Name: "system cmd run:button", Help: "系统命令", Hand: func(m *ice.Message, c *ice.Context, key string, arg ...string) {
			if len(arg) == 0 {
				m.Fields(len(arg), "time,id,cmd")
				m.Cmdy(mdb.SELECT, SYSTEM, "", mdb.LIST)
				return
			}
			m.Grow(SYSTEM, "", kit.Dict(kit.MDB_TIME, m.Time(), CMD, strings.Join(arg, " ")))

			if len(arg) == 1 {
				arg = kit.Split(arg[0])
			}
			cmd := exec.Command(arg[0], arg[1:]...)

			// 运行目录
			if cmd.Dir = m.Option(CMD_DIR); len(cmd.Dir) > 0 {
				m.Log_EXPORT(kit.MDB_META, SYSTEM, CMD_DIR, cmd.Dir)
				if _, e := os.Stat(cmd.Dir); e != nil && os.IsNotExist(e) {
					os.MkdirAll(cmd.Dir, ice.MOD_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, kit.Format("%s=%s", env[i], env[i+1]))
			}
			if len(cmd.Env) > 0 {
				m.Log_EXPORT(kit.MDB_META, SYSTEM, CMD_ENV, cmd.Env)
			}

			switch m.Option(CMD_TYPE) {
			case DAEMON:
				_daemon_show(m, cmd, m.Option(CMD_OUTPUT), m.Option(CMD_ERRPUT))
			default:
				_system_show(m, cmd)
			}
		}},
	}})
}