#!/usr/bin/env bash
# aw-post — Quick-post a scroll from the command line
#
# Usage:
#   aw-post "Title"                      # Create empty post, open for editing
#   aw-post "Title" < body.md            # Pipe body from stdin
#   echo "Post body" | aw-post "Title"   # Pipe body from stdin
#   aw-post --file thoughts.md           # Post from a file (title from first line)
#   aw-post --from-x "Tweet text here"   # Port an X/Twitter post
#
# Creates a markdown file in blog/posts/, rebuilds the blog.

set -euo pipefail

REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
BLOG_DIR="${REPO_DIR}/blog/posts"
DATE=$(date +%Y-%m-%d)

slugify() {
  echo "$1" | tr '[:upper:]' '[:lower:]' | tr ' ' '-' | tr -cd 'a-z0-9-' | head -c 60
}

create_post() {
  local title="$1"
  local body="$2"
  local slug
  slug=$(slugify "$title")
  local filename="${DATE}-${slug}.md"
  local filepath="${BLOG_DIR}/${filename}"

  if [ -f "$filepath" ]; then
    echo "Error: $filepath already exists"
    exit 1
  fi

  cat > "$filepath" << EOF
---
title: "${title}"
date: ${DATE}
---

${body}
EOF

  echo "Created: ${filepath}"
  python3 "${REPO_DIR}/scripts/build.py"
}

# Parse arguments
case "${1:-}" in
  --file)
    # Post from a file — title from first non-empty line
    if [ -z "${2:-}" ] || [ ! -f "${2:-}" ]; then
      echo "Usage: aw-post --file <path-to-markdown>"
      exit 1
    fi
    BODY=$(cat "$2")
    # Extract title: first line starting with # or first non-empty line
    TITLE=$(echo "$BODY" | grep -m1 '^#' | sed 's/^#* *//' || echo "$BODY" | grep -m1 '.' || echo "Untitled")
    if [ -z "$TITLE" ]; then
      TITLE="Untitled"
    fi
    # Strip the title line from body if it was a markdown header
    BODY=$(echo "$BODY" | sed '1{/^#/d;}')
    create_post "$TITLE" "$BODY"
    ;;

  --from-x)
    # Port an X/Twitter post — the text becomes both title and body
    if [ -z "${2:-}" ]; then
      echo "Usage: aw-post --from-x \"Tweet text here\""
      exit 1
    fi
    TEXT="$2"
    # Title: first 60 chars, cleaned up
    TITLE=$(echo "$TEXT" | head -1 | cut -c1-60 | sed 's/[[:space:]]*$//')
    create_post "$TITLE" "$TEXT"
    ;;

  --help|-h)
    echo "aw-post — Quick-post a scroll to The Scrolls"
    echo ""
    echo "Usage:"
    echo "  aw-post \"Title\"                      Create a post (body from stdin)"
    echo "  aw-post --file thoughts.md            Post from a markdown file"
    echo "  aw-post --from-x \"Tweet text\"         Port an X/Twitter post"
    echo "  aw-post --help                        Show this help"
    ;;

  "")
    echo "Usage: aw-post \"Title of the Post\""
    echo "  See: aw-post --help"
    exit 1
    ;;

  *)
    # Standard mode: title as arg, body from stdin
    TITLE="$1"
    BODY=""
    if [ ! -t 0 ]; then
      BODY=$(cat)
    fi
    create_post "$TITLE" "$BODY"
    ;;
esac