#!/bin/bash
set -euo pipefail

GITEA_URL="$1"
OWNER="$2"
REPO="$3"
TAG="$4"
VERSION="$5"
TOKEN="$6"
CHANNEL="${7:-stable}"   # "stable" or "edge"

API_URL="${GITEA_URL}/api/v1"
PACKAGES_DIR="dist/packages"
BINARIES_DIR="dist/bin"
SKIP_RELEASE_CREATION=false

echo "Release configuration:"
echo "   Repository: ${OWNER}/${REPO}"
echo "   Tag: ${TAG}"
echo "   Version: ${VERSION}"
echo ""

# Check if release already exists
echo "Checking if release ${TAG} exists..."
RELEASE_ID=$(curl -s -H "Authorization: token ${TOKEN}" \
    "${API_URL}/repos/${OWNER}/${REPO}/releases/tags/${TAG}" \
    | jq -r '.id // empty')

if [ -n "$RELEASE_ID" ]; then
    echo "Release ${TAG} exists (ID: ${RELEASE_ID})"
    echo "Updating existing release assets..."

    # Get existing assets
    EXISTING_ASSETS=$(curl -s -H "Authorization: token ${TOKEN}" \
        "${API_URL}/repos/${OWNER}/${REPO}/releases/${RELEASE_ID}/assets" \
        | jq -r '.[].id')

    # Delete old assets
    for ASSET_ID in $EXISTING_ASSETS; do
        ASSET_NAME=$(curl -s -H "Authorization: token ${TOKEN}" \
            "${API_URL}/repos/${OWNER}/${REPO}/releases/${RELEASE_ID}/assets/${ASSET_ID}" \
            | jq -r '.name')

            if [[ "$ASSET_NAME" == *.deb ]] || [[ "$ASSET_NAME" == wild-central-* ]] || [[ "$ASSET_NAME" == "SHA256SUMS" ]]; then
            echo "   Deleting old asset: ${ASSET_NAME}"
            curl -s -X DELETE -H "Authorization: token ${TOKEN}" \
                "${API_URL}/repos/${OWNER}/${REPO}/releases/${RELEASE_ID}/assets/${ASSET_ID}"
        fi
    done

    echo "Cleaned up old package assets"
    SKIP_RELEASE_CREATION=true
fi

# Extract changelog section for this version
CHANGELOG_SECTION=""
if [ -f "../CHANGELOG.md" ]; then
    CHANGELOG_SECTION=$(awk "/^## \[${VERSION}\]/{found=1; next} /^## \[/{if(found) exit} found{print}" ../CHANGELOG.md | sed '/^$/d')
fi

INSTALL_DOCS="### Installation

#### Full Installation (.deb package)

Download the appropriate .deb package for your architecture:

- **arm64**: \`wild-central_${VERSION}_arm64.deb\` — Raspberry Pi 4/5, ARM servers
- **amd64**: \`wild-central_${VERSION}_amd64.deb\` — x86_64 systems

\`\`\`bash
wget ${GITEA_URL}/${OWNER}/${REPO}/releases/download/v${VERSION}/wild-central_${VERSION}_amd64.deb
sudo dpkg -i wild-central_${VERSION}_amd64.deb
sudo apt-get install -f
sudo systemctl enable --now wild-central
\`\`\`

#### Standalone Binary

- \`wild-central-{arch}\` — Daemon binary only (Docker/K8s)

#### Verification

\`\`\`bash
wget ${GITEA_URL}/${OWNER}/${REPO}/releases/download/v${VERSION}/SHA256SUMS
sha256sum -c SHA256SUMS
\`\`\`"

if [ -n "$CHANGELOG_SECTION" ]; then
    BODY="${CHANGELOG_SECTION}

---

${INSTALL_DOCS}"
else
    BODY="${INSTALL_DOCS}"
fi

# Set release name and prerelease flag based on channel
if [ "$CHANNEL" = "edge" ]; then
    RELEASE_NAME="Wild Central (edge) — ${VERSION}"
    IS_PRERELEASE=true
else
    RELEASE_NAME="Wild Central ${VERSION}"
    IS_PRERELEASE=false
fi

# Create new release if it doesn't exist
if [ "$SKIP_RELEASE_CREATION" != "true" ]; then
    echo "Creating new release ${TAG}..."
    RELEASE_DATA=$(jq -n \
        --arg tag "${TAG}" \
        --arg name "${RELEASE_NAME}" \
        --arg body "${BODY}" \
        --argjson prerelease "${IS_PRERELEASE}" \
        '{"tag_name": $tag, "name": $name, "body": $body, "draft": false, "prerelease": $prerelease}')

    RELEASE_RESPONSE=$(curl -s -X POST -H "Authorization: token ${TOKEN}" \
        -H "Content-Type: application/json" \
        -d "${RELEASE_DATA}" \
        "${API_URL}/repos/${OWNER}/${REPO}/releases")

    RELEASE_ID=$(echo "${RELEASE_RESPONSE}" | jq -r '.id')

    if [ -z "$RELEASE_ID" ] || [ "$RELEASE_ID" = "null" ]; then
        echo "Failed to create release"
        echo "${RELEASE_RESPONSE}" | jq .
        exit 1
    fi

    echo "Created release ${TAG} (ID: ${RELEASE_ID})"
fi

# Generate checksums
echo ""
echo "Generating checksums..."
cd dist
sha256sum packages/*.deb bin/wild-central-* > SHA256SUMS
echo "Created SHA256SUMS"
cd ..

# Upload artifacts
echo ""
echo "Uploading release artifacts..."

upload_file() {
    local FILE="$1"
    local FILENAME=$(basename "$FILE")

    echo "   Uploading ${FILENAME}..."

    UPLOAD_RESPONSE=$(curl -s -X POST \
        -H "Authorization: token ${TOKEN}" \
        -F "attachment=@${FILE}" \
        "${API_URL}/repos/${OWNER}/${REPO}/releases/${RELEASE_ID}/assets?name=${FILENAME}")

    ASSET_ID=$(echo "${UPLOAD_RESPONSE}" | jq -r '.id')

    if [ -z "$ASSET_ID" ] || [ "$ASSET_ID" = "null" ]; then
        echo "   Failed to upload ${FILENAME}"
        echo "${UPLOAD_RESPONSE}" | jq .
        return 1
    else
        echo "   Uploaded ${FILENAME}"
        return 0
    fi
}

# Upload .deb packages
for DEB in ${PACKAGES_DIR}/wild-central_${VERSION}_*.deb; do
    if [ ! -f "$DEB" ]; then
        echo "No .deb files found for version ${VERSION} in ${PACKAGES_DIR}"
        exit 1
    fi
    upload_file "$DEB"
done

# Upload standalone daemon binaries
for BINARY in ${BINARIES_DIR}/wild-central-*; do
    if [ -f "$BINARY" ]; then
        upload_file "$BINARY"
    fi
done

# Upload checksums
upload_file "dist/SHA256SUMS"

echo ""
echo "Release complete!"
echo "View at: ${GITEA_URL}/${OWNER}/${REPO}/releases/tag/${TAG}"