#!/usr/bin/env bash
set -euo pipefail

# =============================================================================
# phase6_post_check.sh — Verify Phase 6 (GitHub Push Mirrors) succeeded
# Checks for each repo:
#   1. Push mirror config exists in Gitea
#   2. Triggers sync and verifies GitHub has matching latest commit
# Exits 0 only if ALL checks pass.
# =============================================================================

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "${SCRIPT_DIR}/lib/common.sh"

load_env
require_vars GITEA_ADMIN_TOKEN GITEA_INTERNAL_URL GITEA_ORG_NAME \
             GITHUB_USERNAME GITHUB_TOKEN \
             REPO_1_NAME REPO_2_NAME REPO_3_NAME

log_info "=== Phase 6 Post-Check ==="

REPOS=("$REPO_1_NAME" "$REPO_2_NAME" "$REPO_3_NAME")
PASS=0
FAIL=0

run_check() {
  local description="$1"; shift
  if "$@" 2>/dev/null; then
    log_success "$description"
    PASS=$((PASS + 1))
  else
    log_error "FAIL: $description"
    FAIL=$((FAIL + 1))
  fi
}

for repo in "${REPOS[@]}"; do
  log_info "--- Checking repo: ${repo} ---"

  # Check 1: Push mirror exists
  check_mirror_exists() {
    local mirrors
    mirrors=$(gitea_api GET "/repos/${GITEA_ORG_NAME}/$1/push_mirrors")
    local count
    count=$(printf '%s' "$mirrors" | jq 'length')
    [[ "$count" -gt 0 ]]
  }
  run_check "Push mirror exists for ${repo}" check_mirror_exists "$repo"

  # Check 2: Latest commit SHA matches between Gitea and GitHub
  # Trigger a sync first, then compare HEAD commits
  check_commit_sync() {
    # Trigger sync
    gitea_api POST "/repos/${GITEA_ORG_NAME}/$1/push_mirrors-sync" "" >/dev/null 2>&1 || true
    # Brief wait for sync to propagate
    sleep 3

    # Get Gitea's latest commit
    local gitea_sha github_sha
    gitea_sha=$(gitea_api GET "/repos/${GITEA_ORG_NAME}/$1/commits?limit=1" | jq -r '.[0].sha')
    # Get GitHub's latest commit
    github_sha=$(github_api GET "/repos/${GITHUB_USERNAME}/$1/commits?per_page=1" | jq -r '.[0].sha')

    [[ "$gitea_sha" == "$github_sha" ]]
  }
  run_check "Latest commit synced to GitHub for ${repo}" check_commit_sync "$repo"
done

# Summary
printf '\n'
log_info "Results: ${PASS} passed, ${FAIL} failed"

if [[ $FAIL -gt 0 ]]; then
  log_error "Phase 6 post-check FAILED"
  exit 1
else
  log_success "Phase 6 post-check PASSED — push mirrors working"
  exit 0
fi