// Command pgtidy is the PgTidy CLI: a PostgreSQL formatter and linter.
package main

import (
	"fmt"
	"io"
	"os"
)

// version is overridden at build time via -ldflags "-X main.version=...".
var version = "dev"

func main() {
	os.Exit(run(os.Args[1:], os.Stdin, os.Stdout, os.Stderr))
}

func run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
	if len(args) == 0 {
		usage(stderr)
		return 2
	}
	switch args[0] {
	case "fmt", "format":
		return cmdFmt(args[1:], stdin, stdout, stderr)
	case "lint":
		return cmdLint(args[1:], stdin, stdout, stderr)
	case "lsp":
		return cmdLsp(args[1:], stdin, stdout, stderr)
	case "config":
		return cmdConfig(args[1:], stdin, stdout, stderr)
	case "version", "--version", "-v":
		fmt.Fprintf(stdout, "pgtidy %s\n", version)
		return 0
	case "help", "-h", "--help":
		usage(stdout)
		return 0
	default:
		fmt.Fprintf(stderr, "pgtidy: unknown command %q\n", args[0])
		usage(stderr)
		return 2
	}
}

func usage(w io.Writer) {
	fmt.Fprint(w, `pgtidy — PostgreSQL formatter and linter

Usage:
  pgtidy fmt    [flags] [files...]  Format SQL/PL-pgSQL (stdin if no files)
  pgtidy lint   [flags] [files...]  Lint SQL (stdin if no files)
  pgtidy config                     Print effective configuration
  pgtidy lsp                        Start LSP server (stdio, for editors)
  pgtidy version                    Print version
  pgtidy help                       Show this help

fmt flags:
  -w, --write    Rewrite files in place
  -l, --list     List files whose formatting differs (no writes)
  -d, --diff     Print unified diff of changes
      --check    Exit non-zero if any input is not already formatted (CI)

lint flags:
  --only=ID,...  Enable only the specified rule IDs (comma-separated)

Run 'pgtidy lint --help' for the full rule list.
`)
}