#!/usr/bin/env bash
# Rewrite cross-repo URLs in tracked docs/config for the target Git host.
# Usage: rewrite-git-host-urls.sh github|kalinamall|papatramp
set -euo pipefail

TARGET="${1:?usage: rewrite-git-host-urls.sh github|kalinamall|papatramp}"
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$ROOT"

case "$TARGET" in
  github)
    BASE='https://github.com/PTah'
    BLOB_SUFFIX='/blob/main'
  ;;
  kalinamall)
    BASE='https://git.kalinamall.ru/PapaTramp'
    BLOB_SUFFIX='/src/branch/main'
  ;;
  papatramp)
    BASE='https://git.papatramp.ru/PTah'
    BLOB_SUFFIX='/src/branch/main'
  ;;
  *)
    echo "unknown target: $TARGET" >&2
    exit 1
  ;;
esac

# Order matters: longer patterns first.
PATTERNS=(
  's|https://github.com/PTah/\([^)/"'"'"' ]*\)/blob/main/|'"${BASE}"'/\1'"${BLOB_SUFFIX}"'/|g'
  's|https://git.kalinamall.ru/PapaTramp/\([^)/"'"'"' ]*\)/src/branch/main/|'"${BASE}"'/\1'"${BLOB_SUFFIX}"'/|g'
  's|https://git.papatramp.ru/PTah/\([^)/"'"'"' ]*\)/src/branch/main/|'"${BASE}"'/\1'"${BLOB_SUFFIX}"'/|g'
  's|https://github.com/PTah/|'"${BASE}"'/|g'
  's|https://git.kalinamall.ru/PapaTramp/|'"${BASE}"'/|g'
  's|https://git.papatramp.ru/PTah/|'"${BASE}"'/|g'
  's|github.com/PTah/|'"${BASE#https://}"'/|g'
  's|git.kalinamall.ru/PapaTramp/|'"${BASE#https://}"'/|g'
  's|git.papatramp.ru/PTah/|'"${BASE#https://}"'/|g'
)

FILES=()
while IFS= read -r -d '' f; do
  FILES+=("$f")
done < <(git ls-files '*.md' '*.json' '*.service' '*.example' '*.sh' '*.ps1' '*.yml' '*.yaml' 2>/dev/null | tr '\n' '\0')

if [ "${#FILES[@]}" -eq 0 ]; then
  echo "no files to rewrite" >&2
  exit 0
fi

for f in "${FILES[@]}"; do
  [ -f "$f" ] || continue
  tmp="$(mktemp)"
  cp "$f" "$tmp"
  for pat in "${PATTERNS[@]}"; do
    sed -i "$pat" "$tmp" 2>/dev/null || sed -i '' "$pat" "$tmp"
  done
  if ! cmp -s "$f" "$tmp"; then
    mv "$tmp" "$f"
    echo "updated: $f"
  else
    rm -f "$tmp"
  fi
done

echo "rewrite-git-host-urls: target=$TARGET base=$BASE"