#!/bin/bash
# release.sh — build and publish a PhotoPhetch release to Gitea
#
# Usage:
#   ./release.sh 1.0.0 "First release with Android and iPhone support"
#   ./release.sh 1.1.0                   # prompts for release notes
#
# Requires:
#   - curl (built into macOS)
#   - git
#   - ./gradlew (Gradle wrapper in this directory)
#   - GITEA_TOKEN environment variable, or it will prompt
#     Get a token: https://git.bolenpad.com/user/settings/applications

set -euo pipefail

# ── Config ──────────────────────────────────────────────────────────────────
GITEA_URL="https://git.bolenpad.com"
GITEA_USER="kbolen"
GITEA_REPO="photophetch"

# ── Arguments ───────────────────────────────────────────────────────────────
if [ $# -lt 1 ]; then
    echo "Usage: $0 <version> [release-notes]"
    echo "  Example: $0 1.0.0 'First stable release'"
    exit 1
fi

VERSION="$1"
TAG="v${VERSION}"

# Release notes: from argument, or auto-generate from git log
if [ $# -ge 2 ]; then
    NOTES="$2"
else
    # Auto-generate from git log since last tag (or all commits if no tags yet)
    LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
    if [ -n "$LAST_TAG" ]; then
        RAW_LOG=$(git log "${LAST_TAG}..HEAD" --oneline --no-merges)
        LOG_RANGE="since $LAST_TAG"
    else
        RAW_LOG=$(git log --oneline --no-merges | head -30)
        LOG_RANGE="all commits"
    fi

    echo ""
    echo "Auto-generated release notes ($LOG_RANGE):"
    echo "──────────────────────────────────────────"
    echo "$RAW_LOG"
    echo "──────────────────────────────────────────"
    echo ""
    echo "Accept these as release notes? [y=yes, e=edit, q=quit]"
    read -r CHOICE

    case "$CHOICE" in
        y|Y)
            NOTES="$RAW_LOG"
            ;;
        e|E)
            TMPFILE=$(mktemp /tmp/photophetch-release-notes.XXXXXX.md)
            echo "$RAW_LOG" > "$TMPFILE"
            ${EDITOR:-nano} "$TMPFILE"
            NOTES=$(cat "$TMPFILE")
            rm -f "$TMPFILE"
            ;;
        *)
            echo "Aborted."
            exit 1
            ;;
    esac
fi

# Gitea token
if [ -z "${GITEA_TOKEN:-}" ]; then
    echo "GITEA_TOKEN not set."
    read -rsp "Enter Gitea API token: " GITEA_TOKEN
    echo
fi

# ── Pre-flight checks ────────────────────────────────────────────────────────
echo "→ Checking for uncommitted changes..."
if ! git diff --quiet || ! git diff --cached --quiet; then
    echo "ERROR: Uncommitted changes exist. Commit or stash them first."
    exit 1
fi

echo "→ Checking we're on main..."
BRANCH=$(git rev-parse --abbrev-ref HEAD)
if [ "$BRANCH" != "main" ]; then
    echo "ERROR: Not on main branch (currently on '$BRANCH'). Switch to main first."
    exit 1
fi

echo "→ Checking tag $TAG doesn't already exist..."
if git tag | grep -q "^${TAG}$"; then
    echo "ERROR: Tag $TAG already exists."
    exit 1
fi

# ── Update version in build.gradle.kts ──────────────────────────────────────
echo "→ Updating version to $VERSION in build.gradle.kts..."
sed -i.bak "s/packageVersion = \"[^\"]*\"/packageVersion = \"${VERSION}\"/" build.gradle.kts
rm -f build.gradle.kts.bak

# ── Commit version bump ──────────────────────────────────────────────────────
echo "→ Committing version bump..."
git add build.gradle.kts
git commit -m "Bump version to $VERSION"

# ── Build DMG ───────────────────────────────────────────────────────────────
echo "→ Building DMG (this takes a few minutes)..."
./gradlew packageDmg

DMG_PATH=$(find build/compose/binaries/main/dmg -name "*.dmg" | head -1)
if [ -z "$DMG_PATH" ]; then
    echo "ERROR: No DMG found in build/compose/binaries/main/dmg/"
    exit 1
fi
DMG_NAME=$(basename "$DMG_PATH")
echo "→ Built: $DMG_PATH"

# ── Tag and push ─────────────────────────────────────────────────────────────
echo "→ Creating tag $TAG..."
git tag -a "$TAG" -m "Release $TAG"

echo "→ Pushing commits and tag..."
git push origin main
git push origin "$TAG"

# ── Create Gitea release ─────────────────────────────────────────────────────
echo "→ Creating Gitea release $TAG..."
RELEASE_RESPONSE=$(curl -s -X POST \
    "${GITEA_URL}/api/v1/repos/${GITEA_USER}/${GITEA_REPO}/releases" \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -H "Content-Type: application/json" \
    -d "{
        \"tag_name\": \"${TAG}\",
        \"name\": \"PhotoPhetch ${TAG}\",
        \"body\": \"${NOTES}\",
        \"draft\": false,
        \"prerelease\": false
    }")

RELEASE_ID=$(echo "$RELEASE_RESPONSE" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])" 2>/dev/null)
if [ -z "$RELEASE_ID" ]; then
    echo "ERROR: Failed to create release. Response:"
    echo "$RELEASE_RESPONSE"
    exit 1
fi
echo "→ Created release ID $RELEASE_ID"

# ── Upload DMG ───────────────────────────────────────────────────────────────
echo "→ Uploading $DMG_NAME..."
UPLOAD_RESPONSE=$(curl -s -X POST \
    "${GITEA_URL}/api/v1/repos/${GITEA_USER}/${GITEA_REPO}/releases/${RELEASE_ID}/assets?name=${DMG_NAME}" \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -H "Content-Type: application/octet-stream" \
    --data-binary "@${DMG_PATH}")

DOWNLOAD_URL=$(echo "$UPLOAD_RESPONSE" | python3 -c "import sys,json; print(json.load(sys.stdin).get('browser_download_url',''))" 2>/dev/null)
if [ -z "$DOWNLOAD_URL" ]; then
    echo "WARNING: Upload may have failed. Response:"
    echo "$UPLOAD_RESPONSE"
else
    echo "✓ Released: $DOWNLOAD_URL"
fi

echo ""
echo "✓ Done! PhotoPhetch $TAG released."
echo "  Release page: ${GITEA_URL}/${GITEA_USER}/${GITEA_REPO}/releases/tag/${TAG}"