package cmd

import (
	"fmt"
	"io/fs"
	"os"
	"path/filepath"
	"strings"
	"text/template"

	"github.com/samber/lo"
	"github.com/spf13/cobra"
	"go.ipao.vip/atomctl/v2/pkg/utils/gomod"
	"go.ipao.vip/atomctl/v2/templates"
)

// CommandNewProvider 注册 new_provider 命令
func CommandNewJob(root *cobra.Command) {
	cmd := &cobra.Command{
		Use:   "job",
		Short: "创建新的 job",
		Long: `在 app/jobs 下渲染创建任务模板文件。

行为：
- 名称转换：输入名的 Snake 与 Pascal 形式分别用于文件名与导出名
- 输出到 app/jobs/<snake>.go
- --dry-run 仅打印渲染与写入动作；--dir 指定输出基目录（默认 .）

示例：
  atomctl new job SendDailyReport`,
		Args: cobra.ExactArgs(1),
		RunE: commandNewJobE,
	}

	root.AddCommand(cmd)
}

func commandNewJobE(cmd *cobra.Command, args []string) error {
	snakeName := lo.SnakeCase(args[0])
	camelName := lo.PascalCase(args[0])

	// shared flags
	dryRun, _ := cmd.Flags().GetBool("dry-run")
	baseDir, _ := cmd.Flags().GetString("dir")

	basePath := filepath.Join(baseDir, "app/jobs")

	path, err := os.Getwd()
	if err != nil {
		return err
	}

	path, _ = filepath.Abs(path)
	err = gomod.Parse(filepath.Join(path, "go.mod"))
	if err != nil {
		return err
	}

	if dryRun {
		fmt.Printf("[dry-run] mkdir -p %s\n", basePath)
	} else {
		if err := os.MkdirAll(basePath, os.ModePerm); err != nil {
			return err
		}
	}

	err = fs.WalkDir(templates.Jobs, "jobs", func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		}

		if d.IsDir() {
			return nil
		}

		if strings.HasPrefix(snakeName, "job_") {
			snakeName = "job_" + snakeName
		}

		filePath := filepath.Join(basePath, snakeName+".go")
		tmpl, err := template.ParseFS(templates.Jobs, path)
		if err != nil {
			return err
		}

		if dryRun {
			fmt.Printf("[dry-run] render > %s\n", filePath)
			return nil
		}

		destFile, err := os.Create(filePath)
		if err != nil {
			return err
		}
		defer destFile.Close()

		return tmpl.Execute(destFile, map[string]string{
			"Name":       camelName,
			"ModuleName": gomod.GetModuleName(),
		})
	})
	if err != nil {
		return err
	}

	fmt.Printf("job 已创建: %s\n", snakeName)
	return nil
}