#!/bin/bash
set -euo pipefail

ENTRYPOINT="$1"
FLAGS_STRING="${2:-}"
IFS=' ' read -r -a DENOCOMPILE_FLAGS <<< "$FLAGS_STRING"

TAG_NAME=$(git describe --tags --abbrev=0)
REPO_NAME=$(basename -s .git "$(git config --get remote.origin.url)")
OWNER_NAME=$(basename "$(dirname "$(git config --get remote.origin.url)")")
TMPDIR=$(mktemp -d)

echo "Building for tag: $TAG_NAME"
echo "Using entrypoint: $ENTRYPOINT"
echo "With flags: ${DENOCOMPILE_FLAGS[*]}"

platforms=(
  "x86_64-unknown-linux-gnu"
  "x86_64-pc-windows-msvc"
  "x86_64-apple-darwin"
)

for target in "${platforms[@]}"; do
  echo "Compiling for $target"
  outfile="${TMPDIR}/${REPO_NAME}-${target}"
  [[ "$target" == *"windows"* ]] && outfile="${outfile}.exe"

  deno compile \
    --target="$target" \
    --output="$outfile" \
    "${DENOCOMPILE_FLAGS[@]}" \
    "$ENTRYPOINT"
done

API_URL="${CI_SERVER_URL:-https://gitea.example.com}/api/v1"
RELEASE_ENDPOINT="$API_URL/repos/$OWNER_NAME/$REPO_NAME/releases"

# Get commits since the last tag
PREV_TAG=$(git describe --tags --abbrev=0 "$TAG_NAME"^ 2>/dev/null || echo "")
if [[ -n "$PREV_TAG" ]]; then
  echo "Generating changelog from $PREV_TAG to $TAG_NAME"
  COMMITS=$(git log "$PREV_TAG..$TAG_NAME" --pretty=format:"%s (%an)" --no-merges)
else
  echo "No previous tag found, generating changelog from initial commit"
  COMMITS=$(git log --pretty=format:"%s (%an)" --no-merges)
fi

# Group commits by type
CHANGELOG=""
append_section() {
  local TYPE="$1"
  local TITLE="$2"
  local EMOJI="$3"
  local MATCHED=$(echo "$COMMITS" | grep -E "^${TYPE}: " || true)
  if [[ -n "$MATCHED" ]]; then
    CHANGELOG+="## $EMOJI $TITLE\\n"
    while IFS= read -r line; do
      # Remove prefix (e.g., "feat: ")
      local CLEANED=$(echo "$line" | sed -E "s/^${TYPE}: //")
      CHANGELOG+="- $CLEANED\\n"
    done <<< "$MATCHED"
    CHANGELOG+="\\n"
  fi
}

append_section "feat" "Features" "✨"
append_section "fix" "Fixes" "🐛"
append_section "chore" "Chores" "🧹"
append_section "refactor" "Refactors" "🔧"
append_section "docs" "Documentation" "📝"
append_section "test" "Tests" "🧪"
append_section "style" "Style" "🎨"
append_section "ci" "CI/CD" "⚙️"

# Escape quotes for JSON
CHANGELOG_ESCAPED=$(printf "%s" "$CHANGELOG" | sed 's/"/\\"/g')

RELEASE_BODY=""

if [[ -f "CHANGELOG.md" ]]; then
  echo "Looking for manual changelog entry for $TAG_NAME..."
  MANUAL_SECTION=$(awk "/^## \\[?$TAG_NAME\\]? /{flag=1; next} /^## /{flag=0} flag" CHANGELOG.md)

  if [[ -n "$MANUAL_SECTION" ]]; then
    echo "Manual entry found for $TAG_NAME"

    if grep -q '<!-- auto-changelog -->' <<< "$MANUAL_SECTION"; then
      echo "Injecting auto-changelog into manual entry"
      FINAL_SECTION=$(sed "s|<!-- auto-changelog -->|$CHANGELOG|" <<< "$MANUAL_SECTION")
    else
      FINAL_SECTION="$MANUAL_SECTION"
    fi

    # Escape quotes and newlines
    RELEASE_BODY=$(printf "%s" "$FINAL_SECTION" | sed ':a;N;$!ba;s/\n/\\n/g; s/"/\\"/g')
  fi
fi

# Fallback to full auto-changelog
if [[ -z "$RELEASE_BODY" ]]; then
  echo "Using full auto-generated changelog"
  RELEASE_BODY="$CHANGELOG_ESCAPED"
fi


IS_PRERELEASE="false"
if [[ "$TAG_NAME" =~ -[0-9A-Za-z] ]]; then
  IS_PRERELEASE="true"
fi

echo "Creating release $TAG_NAME (prerelease: $IS_PRERELEASE)..."

RELEASE_JSON=$(curl -sS -X POST "$RELEASE_ENDPOINT" \
  -H "Authorization: token $GITEA_TOKEN" \
  -H "Content-Type: application/json" \
  -d @- <<EOF
{
  "tag_name": "$TAG_NAME",
  "name": "$TAG_NAME",
  "draft": false,
  "prerelease": $IS_PRERELEASE,
  "body": "$RELEASE_BODY"
}
EOF
)

UPLOAD_URL=$(echo "$RELEASE_JSON" | jq -r '.upload_url // .assets_url')

for file in "$TMPDIR"/*; do
  FILENAME=$(basename "$file")
  echo "Uploading $FILENAME..."
  curl -sS -X POST "$UPLOAD_URL" \
    -H "Authorization: token $GITEA_TOKEN" \
    -F name="$FILENAME" \
    -F attachment=@"$file"
done