package executor

import (
	logger2 "agent-go/logger"
	"bufio"
	"bytes"
	"fmt"
	"os/exec"
	"strings"
)

type ExecutionMessage struct {
	NeedResultReplay  bool       `json:"needResultReplay"`
	DurationTask      bool       `json:"durationTask,default:false"`
	Type              string     `json:"type"`
	FuncContent       []string   `json:"funcContent"`
	SingleLineCommand []string   `json:"singleLineCommand"`
	MultiLineCommand  [][]string `json:"multiLineCommand"`
	PipeLineCommand   [][]string `json:"pipeLineCommand"`
	ResultKey         string     `json:"resultKey"`
}

var log = logger2.Log

var AgentOsOperatorCache = &AgentOsOperator{}

func Execute(em *ExecutionMessage) ([]string, error) {

	var resultLog []string
	var err error
	var realCommand [][]string
	ok := true

	if strings.HasPrefix(em.Type, "BASE") {
		// base function
		if len(em.FuncContent) > 1 {
			ok, resultLog = AgentOsOperatorCache.Exec(em.FuncContent[0], em.FuncContent[1:]...)
		} else {
			ok, resultLog = AgentOsOperatorCache.Exec(em.FuncContent[0])
		}
		if ok {
			return resultLog, nil
		}

	} else if strings.HasPrefix(em.Type, "APP") {
		// app function
		if len(em.FuncContent) > 1 {
			ok, resultLog = AgentOsOperatorCache.Deploy(em.FuncContent[0], em.FuncContent[1:]...)
		} else {
			ok, resultLog = AgentOsOperatorCache.Deploy(em.FuncContent[0])
		}
		if ok {
			return resultLog, nil
		} else {
			return resultLog, nil
		}

	} else {
		// shell command

		if em.PipeLineCommand != nil && len(em.PipeLineCommand) != 0 {
			// 管道命令
			resultLog, err = PipeLineCommandExecutor(em.PipeLineCommand)
			realCommand = em.PipeLineCommand
		} else if em.MultiLineCommand != nil && len(em.MultiLineCommand) != 0 {
			// 多行命令
			resultLog, err = MultiLineCommandExecutor(em.MultiLineCommand)
			realCommand = em.MultiLineCommand
		} else {
			// 单行命令
			resultLog, err = FormatAllCommandExecutor(em.SingleLineCommand)
			realCommand = [][]string{em.SingleLineCommand}
		}
	}

	// 归一化错误和日志
	if err != nil {
		resultLog = append(resultLog, "↓↓↓ 命令 Error 如下 ↓↓↓", err.Error())
	}

	// debug
	commandResult := fmt.Sprintf("Excution Comand are=> %v, Executor Result: %v", realCommand, resultLog)
	log.Debug(commandResult)

	return resultLog, err
}

func PipeLineCommandExecutor(pipeLineCommand [][]string) ([]string, error) {

	var resultSlice []string
	var output []byte
	var err error

	tmp := make([]string, len(pipeLineCommand))
	for index, pipe := range pipeLineCommand {
		tmp[index] = strings.Join(pipe, " ")
	}
	pipelineCommandString := strings.Join(tmp, " | ")

	resultSlice = append(resultSlice, fmt.Sprintf(" ========= 命令为 ====> %s", pipelineCommandString))

	for _, pipeCommand := range pipeLineCommand {
		if len(pipeCommand) == 0 {
			continue
		}

		command := exec.Command(pipeCommand[0], pipeCommand[1:]...)
		if len(output) > 0 {
			command.Stdin = bytes.NewBuffer(output)
		}

		output, err = command.CombinedOutput()
		if err != nil {
			log.ErrorF("Pipeline Command Command Error => %v", err.Error())

			// 收集错误的信息
			resultSlice = append(resultSlice, "↓↓↓ 命令 错误 如下 ↓↓↓", string(output))
			return resultSlice, err
		}
	}

	// 正常的输出
	resultSlice = append(resultSlice, "↓↓↓ 命令 输出 如下 ↓↓↓", string(output))
	return resultSlice, err
}

func MultiLineCommandExecutor(multiLineCommandExecutor [][]string) ([]string, error) {

	var res []string
	for _, singleLineCommand := range multiLineCommandExecutor {
		singleLogs, err := FormatAllCommandExecutor(singleLineCommand)
		res = append(res, singleLogs...)
		if err != nil {
			log.Error(fmt.Sprintf("Execution error ! command is %v, error is %v", singleLineCommand, err))
			return res, err
		}
	}

	return res, nil
}

// SingleLineCommandExecutor 执行单行命令
func SingleLineCommandExecutor(singleLineCommand []string) ([]string, error) {

	cmd := exec.Command(singleLineCommand[0], singleLineCommand[1:]...)
	var out bytes.Buffer
	cmd.Stdout = &out
	cmd.Stderr = &out

	err := cmd.Run()

	scanner := bufio.NewScanner(&out)
	var result []string
	for scanner.Scan() {
		result = append(result, scanner.Text())
	}

	if err != nil {
		return nil, err
	}

	return result, nil
}