package cmd

import (
    "fmt"
    "os"

    "github.com/spf13/cobra"
)

// completionCmd represents the completion command
var completionCmd = &cobra.Command{
    Use:   "completion [bash|zsh|fish|powershell]",
    Short: "Generate completion script",
    Long: `Generate shell completion script for {{.CLIName}}.

The completion script must be evaluated to provide interactive
completion. This can be done by sourcing it from your shell profile.

Bash:
    source <({{.CLIName}} completion bash)

    # To load completions for each session, execute once:
    # Linux:
    {{.CLIName}} completion bash > /etc/bash_completion.d/{{.CLIName}}
    # macOS:
    {{.CLIName}} completion bash > /usr/local/etc/bash_completion.d/{{.CLIName}}

Zsh:
    # If shell completion is not already enabled, enable it:
    echo "autoload -U compinit; compinit" >> ~/.zshrc

    # To load completions for each session, execute once:
    {{.CLIName}} completion zsh > "${fpath[1]}/_{{.CLIName}}"

    # You will need to start a new shell for this setup to take effect.

Fish:
    {{.CLIName}} completion fish | source

    # To load completions for each session, execute once:
    {{.CLIName}} completion fish > ~/.config/fish/completions/{{.CLIName}}.fish

PowerShell:
    {{.CLIName}} completion powershell | Out-String | Invoke-Expression

    # To load completions for every new session:
    {{.CLIName}} completion powershell > {{.CLIName}}.ps1
    # and source this file from your PowerShell profile.
`,
    DisableFlagsInUseLine: true,
    ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
    Args:                  cobra.ExactArgs(1),
    RunE: func(cmd *cobra.Command, args []string) error {
        switch args[0] {
        case "bash":
            return cmd.Root().GenBashCompletion(os.Stdout)
        case "zsh":
            return cmd.Root().GenZshCompletion(os.Stdout)
        case "fish":
            return cmd.Root().GenFishCompletion(os.Stdout, true)
        case "powershell":
            return cmd.Root().GenPowerShellCompletionWithDesc(os.Stdout)
        default:
            return fmt.Errorf("unsupported shell type: %s", args[0])
        }
    },
}

func init() {
    rootCmd.AddCommand(completionCmd)
}