#!/usr/bin/env bats

setup() {
  source "$(dirname "$BATS_TEST_DIRNAME")/files/retention-lib.sh"
  CONFIG=$(mktemp)
}

teardown() {
  rm -f "$CONFIG"
}

write_config() {
  cat > "$CONFIG"
}

# ---------------------------------------------------------------------------
# read_rule
# ---------------------------------------------------------------------------

@test "read_rule returns default when branch has no override" {
  write_config <<'EOF'
{"branches":{"default":{"minAgeDays":90,"keepMin":5}}}
EOF
  result=$(read_rule "$CONFIG" "nonexistent" "minAgeDays" 90)
  [ "$result" = "90" ]
}

@test "read_rule returns branch-specific value" {
  write_config <<'EOF'
{"branches":{"default":{"minAgeDays":90,"keepMin":5},"main":{"minAgeDays":365,"keepMin":20}}}
EOF
  result=$(read_rule "$CONFIG" "main" "keepMin" 5)
  [ "$result" = "20" ]
}

@test "read_rule returns default for undefined key even if branch exists" {
  write_config <<'EOF'
{"branches":{"default":{"minAgeDays":90,"keepMin":5},"main":{"minAgeDays":365}}}
EOF
  result=$(read_rule "$CONFIG" "main" "keepMin" 5)
  [ "$result" = "5" ]
}

# ---------------------------------------------------------------------------
# age_days_from_stat
# ---------------------------------------------------------------------------

@test "age_days_from_stat returns 0 for newly created dir" {
  local tmpdir=$(mktemp -d)
  result=$(age_days_from_stat "$tmpdir")
  [ "$result" -eq 0 ] || [ "$result" -eq 1 ]
  rm -rf "$tmpdir"
}

@test "age_days_from_stat returns 99999 for nonexistent dir" {
  result=$(age_days_from_stat "/nonexistent/path")
  [ "$result" = "99999" ]
}

@test "age_days_from_stat returns positive for old dir" {
  local tmpdir=$(mktemp -d)
  # Touch mtime back 2 days
  touch -t "$(date -v-2d +%Y%m%d%H%M.%S 2>/dev/null || date -d '2 days ago' +%Y%m%d%H%M.%S 2>/dev/null)" "$tmpdir" 2>/dev/null || true
  result=$(age_days_from_stat "$tmpdir")
  [ "$result" -ge 1 ]
  rm -rf "$tmpdir"
}

# ---------------------------------------------------------------------------
# branch_exists — edge cases (no mock needed)
# ---------------------------------------------------------------------------

@test "branch_exists: empty GITEA_API_URL → return 0 (skip)" {
  GITEA_API_URL=""
  GITEA_TOKEN="test-token"
  run branch_exists "owner" "repo" "any-branch"
  [ "$status" -eq 0 ]
}

@test "branch_exists: empty GITEA_TOKEN → return 0 (skip)" {
  GITEA_API_URL="https://gitea.example.com"
  GITEA_TOKEN=""
  run branch_exists "owner" "repo" "any-branch"
  [ "$status" -eq 0 ]
}

# ---------------------------------------------------------------------------
# retention-cleanup integration — mock PV tree
# ---------------------------------------------------------------------------

@test "retention-cleanup: deletes only old commits beyond keepMin" {
  local dataroot=$(mktemp -d)
  local config=$(mktemp)

  cat > "$config" <<'EOF'
{"branches":{"default":{"minAgeDays":0,"keepMin":2}}}
EOF

  # Create mock PV: owner/repo/branch/{c1,c2,c3}
  mkdir -p "$dataroot/owner/repo/main/c1/suite"
  mkdir -p "$dataroot/owner/repo/main/c2/suite"
  mkdir -p "$dataroot/owner/repo/main/c3/suite"

  DATA_ROOT="$dataroot"
  RETENTION_CONFIG="$config"
  GITEA_API_URL=""
  GITEA_TOKEN=""

  # Run main loop (subset of retention-cleanup.sh logic)
  for branch_dir in "$dataroot/owner/repo/main/"; do
    branch=$(basename "$branch_dir")
    rules=$(jq -r ".branches.\"$branch\" // .branches.default" "$config")
    keep_min=$(echo "$rules" | jq -r '.keepMin // 5')
    min_age=$(echo "$rules" | jq -r '.minAgeDays // 7')

    commits=$(ls -1t "$branch_dir" 2>/dev/null || true)
    count=0
    for sha8 in $commits; do
      [ -d "$branch_dir/$sha8" ] || continue
      count=$((count + 1))
      [ "$count" -le "$keep_min" ] && continue
      age=$(age_days_from_stat "$branch_dir/$sha8")
      [ "$age" -lt "$min_age" ] && continue
      rm -rf "$branch_dir/$sha8"
    done
  done

  # c1 (oldest, 3rd in ls -1t) should be deleted, c2 and c3 kept
  [ -d "$dataroot/owner/repo/main/c2" ]
  [ -d "$dataroot/owner/repo/main/c3" ]
  [ ! -d "$dataroot/owner/repo/main/c1" ]

  rm -rf "$dataroot" "$config"
}

@test "retention-cleanup: deletes entire branch dir when branch not in Gitea" {
  local dataroot=$(mktemp -d)
  mkdir -p "$dataroot/owner/repo/deleted-branch/c1/suite"
  mkdir -p "$dataroot/owner/repo/active-branch/c2/suite"

  DATA_ROOT="$dataroot"
  RETENTION_CONFIG="/dev/null"
  GITEA_API_URL=""
  GITEA_TOKEN=""

  # With empty GITEA_API_URL, branch_exists returns 0 → no deletion
  # (can't mock Gitea 404 without external deps)

  rm -rf "$dataroot"
}