package threadspost

import (
	"strings"
)

// FormatDraftText normalizes generated post bodies without destroying the author's voice.
func FormatDraftText(text string) string {
	text = strings.ReplaceAll(text, "\r\n", "\n")
	text = strings.ReplaceAll(text, "\r", "\n")
	text = strings.TrimSpace(text)
	if text == "" {
		return ""
	}

	lines := strings.Split(text, "\n")
	out := make([]string, 0, len(lines))
	blankCount := 0
	for _, line := range lines {
		line = strings.TrimSpace(line)
		if line == "" {
			blankCount++
			if blankCount <= 1 && len(out) > 0 {
				out = append(out, "")
			}
			continue
		}
		blankCount = 0
		out = append(out, line)
	}
	for len(out) > 0 && out[len(out)-1] == "" {
		out = out[:len(out)-1]
	}
	return ClampPublish(strings.Join(out, "\n"))
}