#!/bin/bash
# notify-gitea.sh - Create Gitea issues for systemd service failures
#
# Usage: notify-gitea.sh <service-name> <status>
#   status: "success" or "failure"
#   Only creates an issue on failure; success is logged but ignored.
#
# Configuration:
#   Set these environment variables or create /etc/notify-gitea.conf:
#     GITEA_URL      - Base URL of your Gitea instance (e.g., https://gitea.example.com)
#     GITEA_TOKEN    - API token with repo write access
#     GITEA_OWNER    - Repository owner (user or org)
#     GITEA_REPO     - Repository name

set -euo pipefail

SERVICE_NAME="${1:-unknown}"
STATUS="${2:-unknown}"
HOSTNAME=$(hostname)
TIMESTAMP=$(date '+%Y-%m-%d %H:%M:%S %Z')

# Load config from file if not set
if [[ -f /etc/notify-gitea.conf ]]; then
    source /etc/notify-gitea.conf
fi

# Validate required variables
for var in GITEA_URL GITEA_TOKEN GITEA_OWNER GITEA_REPO; do
    if [[ -z "${!var:-}" ]]; then
        echo "Error: $var not set" >&2
        exit 1
    fi
done

# Only create issues on failure
if [[ "$STATUS" == "success" ]]; then
    echo "Service ${SERVICE_NAME} succeeded - no issue created"
    exit 0
fi

# Get recent logs for context (last 20 lines)
# Try system journal first, fall back to user journal
RECENT_LOGS=$(journalctl -u "$SERVICE_NAME" -n 20 --no-pager 2>/dev/null)
if [[ -z "$RECENT_LOGS" || "$RECENT_LOGS" == *"-- No entries --"* ]]; then
    RECENT_LOGS=$(journalctl --user-unit "$SERVICE_NAME" -n 20 --no-pager 2>/dev/null || echo "No logs available")
fi

# Build issue title and body
TITLE="[${HOSTNAME}] Service failure: ${SERVICE_NAME}"

BODY="## Service Failure Report

**Service:** \`${SERVICE_NAME}\`
**Host:** \`${HOSTNAME}\`
**Time:** ${TIMESTAMP}
**Status:** ${STATUS}

## Recent Logs

\`\`\`
${RECENT_LOGS}
\`\`\`
"

# Create JSON payload using jq for proper escaping
PAYLOAD=$(jq -n \
    --arg title "$TITLE" \
    --arg body "$BODY" \
    '{title: $title, body: $body}')

# Create the issue via Gitea API
API_URL="${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${GITEA_REPO}/issues"

RESPONSE=$(curl -s -w "\n%{http_code}" \
    -X POST \
    -H "Content-Type: application/json" \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -d "$PAYLOAD" \
    "$API_URL")

HTTP_CODE=$(echo "$RESPONSE" | tail -1)
BODY_RESPONSE=$(echo "$RESPONSE" | sed '$d')

if [[ "$HTTP_CODE" -ge 200 && "$HTTP_CODE" -lt 300 ]]; then
    ISSUE_NUMBER=$(echo "$BODY_RESPONSE" | jq -r '.number // "unknown"')
    ISSUE_URL=$(echo "$BODY_RESPONSE" | jq -r '.html_url // "unknown"')
    echo "Issue #${ISSUE_NUMBER} created for ${SERVICE_NAME} failure"
    echo "URL: ${ISSUE_URL}"
else
    echo "Error creating issue: HTTP ${HTTP_CODE}" >&2
    echo "$BODY_RESPONSE" >&2
    exit 1
fi