#!/usr/bin/env bash
# .gitea/workflows/scripts/decide.sh — merge-gate decision job for Gitea Actions.
# Reads upstream job results (Gitea/GitHub Actions values: success | failure |
# skipped | cancelled) from env and applies the R-TEST-03 rule honestly.
#
#   R_LINT R_L0 R_L1   L0/L1 layers (run in CI, no cluster). Any failure -> BLOCK.
#   R_CONF             L2/L3 conformance job:
#                        success  -> green
#                        failure/cancelled -> BLOCK
#                        skipped + CLUSTER_AVAILABLE=true  -> BLOCK (should have run)
#                        skipped + no cluster -> UNVERIFIED (Phase 0), do NOT fake green
#
# Set REQUIRE_CLUSTER_TESTS=true (Phase 1+) to turn any unverified cluster-needing
# touched requirement into a hard block.
set -uo pipefail
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${HERE}/../../.." && pwd)"

: "${R_LINT:=}"; : "${R_L0:=}"; : "${R_L1:=}"; : "${R_CONF:=}"
: "${CLUSTER_AVAILABLE:=false}"
: "${REQUIRE_CLUSTER_TESTS:=false}"

sm() { [ -n "${GITHUB_STEP_SUMMARY:-}" ] && printf '%s\n' "$*" >> "$GITHUB_STEP_SUMMARY" || true; }
say() { printf '%s\n' "$*" >&2; }

cluster_on() { case "$CLUSTER_AVAILABLE" in true|1|yes) return 0;; *) return 1;; esac; }

block=0
sm "## Merge gate decision (R-TEST-03)"
sm ""
sm "| Stage | Result |"
sm "|---|---|"

for pair in "lint:$R_LINT" "l0:$R_L0" "l1:$R_L1"; do
  name="${pair%%:*}"; res="${pair#*:}"
  case "$res" in
    success)   say "[ ok ] ${name}: green"; sm "| ${name} | pass |" ;;
    skipped|"") say "[warn] ${name}: skipped/unwired (Phase 0 placeholder) — not green"; sm "| ${name} | skipped |" ;;
    *)         say "[FAIL] ${name}: ${res} -> BLOCK"; sm "| ${name} | **FAIL** |"; block=1 ;;
  esac
done

# Touched-requirement subset for reporting UNVERIFIED items.
mapfile -t reqs < <("${REPO_ROOT}/ci/touched-requirements.sh" 2>/dev/null || true)

case "$R_CONF" in
  success)
    say "[ ok ] conformance (L2/L3): green"; sm "| conformance (L2/L3) | pass |" ;;
  failure|cancelled)
    say "[FAIL] conformance (L2/L3): ${R_CONF} -> BLOCK"; sm "| conformance (L2/L3) | **FAIL** |"; block=1 ;;
  skipped|"")
    if cluster_on; then
      say "[FAIL] conformance skipped but CLUSTER_AVAILABLE=true -> BLOCK"
      sm "| conformance (L2/L3) | **FAIL (skipped w/ cluster)** |"; block=1
    else
      sm "| conformance (L2/L3) | skipped — cluster required (Phase 0) |"
      if [ "${#reqs[@]}" -gt 0 ]; then
        say "[warn] L2/L3 UNVERIFIED (no cluster) for touched requirements: ${reqs[*]}"
        sm ""
        sm "> **UNVERIFIED (no cluster, Phase 0):** ${reqs[*]}"
        if [ "$REQUIRE_CLUSTER_TESTS" = "true" ]; then
          say "[FAIL] REQUIRE_CLUSTER_TESTS=true and requirements unverified -> BLOCK"; block=1
        fi
      else
        say "[skip] L2/L3 skipped; no cluster-needing requirements touched"
      fi
    fi ;;
  *)
    say "[FAIL] conformance: unexpected result '${R_CONF}' -> BLOCK"; block=1 ;;
esac

sm ""
if [ "$block" -eq 0 ]; then
  say "MERGE GATE: PASS"
  sm "**Result: PASS** — touched-requirement subset green for the layers that can run this phase."
  exit 0
else
  say "MERGE GATE: BLOCKED"
  sm "**Result: BLOCKED** — see failures above."
  exit 1
fi