#!/usr/bin/env bash
# This script demonstrates how to construct a Go pseudo-version for a commit from the
# "caddy-dns/namecheap" repository using curl, jq, and date.
#
# The pseudoversion format is:
#   0.0.0-YYYYMMDDHHMMSS-<short-commit-hash>
#
# Steps:
#
# 1. Query the GitHub API for the commit metadata. (The URL is:
#      https://api.github.com/repos/caddy-dns/namecheap/commits/HEAD
#    You can replace HEAD with a specific commit SHA if needed.)
#
# 2. Extract the commit date. The GitHub API returns the date in ISO 8601 format, e.g.,
#    "2025-02-15T18:47:56Z".
#
# 3. Convert that date to UTC timestamp in the format YYYYMMDDHHMMSS.
#
# 4. Extract the full commit SHA and take its first 12 characters.
#
# 5. Combine these values in the form: "0.0.0-<timestamp>-<short-hash>", resulting in a pseudo-version,
#    like: "0.0.0-20250215184756-635a4c34fd25"
#
# Example:
#   Given:
#     Commit date = "2025-02-15T18:47:56Z"
#     Commit SHA  = "635a4c34fd25d48df62f8e9d5485ac9026796a83"
#   The pseudo-version will be:
#     0.0.0-20250215184756-635a4c34fd25

# Set the commit reference (or use a specific commit SHA instead of "HEAD")
COMMIT_REF="HEAD"

# Fetch commit metadata from GitHub API
COMMIT_JSON=$(curl -s "https://api.github.com/repos/caddy-dns/namecheap/commits/$COMMIT_REF")

# Extract the commit date (author date)
COMMIT_DATE=$(echo "$COMMIT_JSON" | jq -r '.commit.author.date')

# Convert the date to UTC (should already be in UTC if it ends with 'Z') and format it as YYYYMMDDHHMMSS
TIMESTAMP=$(date -u -d "$COMMIT_DATE" +"%Y%m%d%H%M%S")

# Extract the full commit hash and get the first 12 characters
FULL_HASH=$(echo "$COMMIT_JSON" | jq -r '.sha')
SHORT_HASH=${FULL_HASH:0:12}

# Construct the pseudo-version string
PSEUDO_VERSION="0.0.0-${TIMESTAMP}-${SHORT_HASH}"

echo "Pseudo-Version: $PSEUDO_VERSION"