#!/usr/bin/env bash
# End-to-end test of the print loop, with every machine faked: upload a file to
# the REAL object store through the presigned URL the API hands out, let the
# REAL scheduler dispatch it over the REAL /ws/edge/v1 to a stand-in gateway,
# which downloads it from the REAL presigned GET and hashes it, then reports
# the print running and finished. The job must be completed, and the bytes the
# gateway received must be the bytes uploaded.
#
# SAFETY: dispatch is ON here, deliberately - so this is only safe because the
# only gateway this backend instance can have is the stand-in (a real proxy
# would have to be pointed at this instance's random port). No printer is
# touched.
#
# Needs the real object-store settings: set -a; . ../dev-secrets.sh; set +a
#
# This is the test that the unit tests cannot be. tests/authz.test.ts proves
# tokens are verified and that the role ladder orders correctly; only this
# proves that each route actually asks, that scoping is applied in the query
# rather than after it, and that credentials stay out of responses - the three
# things that were wrong when every route was unauthenticated.
#
# Four users, two organisations, no printers or gateways needed:
#   owner_a, operator_a, viewer_a  in org A, which owns farm A and printer A
#   outsider_b                     in org B, which owns nothing
#
# Usage:
#   scripts/dev-env.sh up && scripts/dev-env.sh schema
#   scripts/e2e-authz.sh
#
#   KEEP_DATA=1   leave the seeded organisations behind for inspection
set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$REPO_ROOT"

PORT="${PORT:-3037}"
AUTH_PORT="${AUTH_PORT:-3038}"
BASE="http://localhost:$PORT"
DATABASE_URL="${DATABASE_URL:-postgres://continuum:continuum@localhost:5432/continuum}"
VALKEY_URL="${VALKEY_URL:-redis://localhost:6379}"
EDGE_JWT_SECRET="${EDGE_JWT_SECRET:-e2e-edge-secret}"
# Presigning a PUT is local HMAC with no network call, so POST /jobs works
# offline - but the SDK refuses to sign with empty credentials.
R2_ACCESS_KEY_ID="${R2_ACCESS_KEY_ID:-}"
R2_SECRET_ACCESS_KEY="${R2_SECRET_ACCESS_KEY:-}"
R2_ENDPOINT="${R2_ENDPOINT:-}"
export DATABASE_URL VALKEY_URL EDGE_JWT_SECRET PORT
export R2_ACCESS_KEY_ID R2_SECRET_ACCESS_KEY R2_ENDPOINT

WORK="$(mktemp -d)"
BACKEND_PID=""
AUTH_PID=""
FAILURES=0

# `uuidgen` is not installed everywhere; the kernel's generator always is.
new_uuid() {
  if [ -r /proc/sys/kernel/random/uuid ]; then
    cat /proc/sys/kernel/random/uuid
  else
    python3 -c 'import uuid; print(uuid.uuid4())'
  fi
}

# Uses DATABASE_URL rather than a hardcoded localhost. The backend under test
# reads that variable, so a psql pointed anywhere else seeds fixtures into a
# different database than the one being exercised - and the failure message
# below names DATABASE_URL, which would then be naming a URL nothing tried.
psql_q() { psql "$DATABASE_URL" -tAq -c "$1"; }

cleanup() {
  local rc=$?
  # Never `kill $PID` with an unset PID: `kill 0` signals the whole process
  # group, which includes this script and whatever launched it.
  local pids=()
  [ -n "$BACKEND_PID" ] && pids+=("$BACKEND_PID")
  [ -n "$AUTH_PID" ] && pids+=("$AUTH_PID")
  if [ ${#pids[@]} -gt 0 ]; then
    kill "${pids[@]}" 2>/dev/null || true
    sleep 0.3
    kill -9 "${pids[@]}" 2>/dev/null || true
  fi
  if [ -z "${KEEP_DATA:-}" ]; then
    for org in "${ORG_A:-}" "${ORG_B:-}"; do
      [ -n "$org" ] && psql_q "DELETE FROM organisations WHERE id = '$org'" >/dev/null 2>&1 || true
    done
  fi
  if [ $rc -ne 0 ]; then
    echo
    echo "--- backend log (tail) ---"; tail -30 "$WORK/backend.log" 2>/dev/null || true
    echo "--- fake gateway log ---"; cat "$WORK/gw.log" 2>/dev/null || true
  fi
  rm -rf "$WORK"
  exit $rc
}
trap cleanup EXIT

fail() { echo "FAIL: $*" >&2; exit 1; }
ok()   { echo "  ok: $*"; }
bad()  { echo "  FAILED: $*" >&2; FAILURES=$((FAILURES + 1)); }

# `req <method> <path> <token|-> [json body]` -> prints the status code,
# leaves the response body in $WORK/last.json.
req() {
  local method="$1" path="$2" token="$3" body="${4:-}"
  local args=(-s -o "$WORK/last.json" -w '%{http_code}' -X "$method" "$BASE$path")
  [ "$token" != "-" ] && args+=(-H "authorization: Bearer $token")
  [ -n "$body" ] && args+=(-H 'content-type: application/json' -d "$body")
  curl "${args[@]}"
}

# `expect <code> <method> <path> <token> [body] -- <description>`
expect() {
  local want="$1"; shift
  local method="$1" path="$2" token="$3"; shift 3
  local body=""
  if [ "${1:-}" != "--" ]; then body="$1"; shift; fi
  shift # the --
  local what="$*"
  local got; got="$(req "$method" "$path" "$token" "$body")"
  if [ "$got" = "$want" ]; then
    ok "$what ($got)"
  else
    bad "$what: expected $want, got $got - $(head -c 300 "$WORK/last.json")"
  fi
}

body_has()    { grep -q "$1" "$WORK/last.json" || bad "expected '$1' in: $(head -c 300 "$WORK/last.json")"; }
body_lacks()  { grep -q "$1" "$WORK/last.json" && bad "'$1' leaked into: $(head -c 300 "$WORK/last.json")" || true; }
json()        { python3 -c "import json,sys; d=json.load(sys.stdin); print($1)" < "$WORK/last.json"; }

# --- 0. preconditions ------------------------------------------------------

echo "==> checking the database is up and migrated"
psql_q "SELECT 1" >/dev/null 2>&1 || fail "no database at $DATABASE_URL - run scripts/dev-env.sh up"
psql_q "SELECT org_id FROM farms LIMIT 0" >/dev/null 2>&1 \
  || fail "farms.org_id is missing - run scripts/dev-env.sh schema"
psql_q "SELECT role FROM org_members LIMIT 0" >/dev/null 2>&1 \
  || fail "org_members is missing - run scripts/dev-env.sh schema"
ok "schema has the org layer"

# --- 1. the issuer and the backend ----------------------------------------

echo "==> starting the dev-auth JWKS issuer on :$AUTH_PORT"
bun scripts/dev-auth.ts --port "$AUTH_PORT" > "$WORK/auth.log" 2>&1 &
AUTH_PID=$!
AUTH_URL="http://localhost:$AUTH_PORT"
for _ in $(seq 1 40); do
  curl -sf "$AUTH_URL/auth/v1/.well-known/jwks.json" >/dev/null 2>&1 && break
  sleep 0.25
done
curl -sf "$AUTH_URL/auth/v1/.well-known/jwks.json" >/dev/null 2>&1 \
  || fail "the dev-auth issuer did not come up: $(cat "$WORK/auth.log")"
export SUPABASE_URL="$AUTH_URL"
ok "issuer up, SUPABASE_URL=$SUPABASE_URL"

mint() { curl -sf "$AUTH_URL/token?sub=$1" | python3 -c 'import json,sys; print(json.load(sys.stdin)["access_token"])'; }


echo "==> starting continuum-backend on :$PORT"
bun run src/index.ts > "$WORK/backend.log" 2>&1 &
BACKEND_PID=$!
for _ in $(seq 1 60); do
  curl -sf "$BASE/health" >/dev/null 2>&1 && break
  sleep 0.5
done
curl -sf "$BASE/health" >/dev/null 2>&1 || fail "backend did not become healthy: $(cat "$WORK/backend.log")"
ok "backend healthy"

# --- 2. a farm with one idle printer and a stand-in gateway ----------------

OWNER_ID="$(new_uuid)"; OWNER="$(mint "$OWNER_ID")"
expect 201 POST /orgs "$OWNER" '{"name":"e2e job-flow org"}' -- "create an org"
ORG_A="$(json 'd["id"]')"
expect 201 POST /farms "$OWNER" "{\"name\":\"e2e job-flow farm\",\"orgId\":\"$ORG_A\"}" -- "create a farm"
FARM_A="$(json 'd["id"]')"
expect 201 POST /printers "$OWNER" \
  "{\"farmId\":\"$FARM_A\",\"name\":\"Fake P1\",\"vendor\":\"bambu\",\"gatewayPrinterId\":\"fakep\"}" -- "claim a printer"
PRINTER_A="$(json 'd["id"]')"
expect 200 POST "/farms/$FARM_A/edge-proxy-token" "$OWNER" -- "mint the gateway token"
PROXY_TOKEN="$(json 'd["edgeProxyToken"]')"
expect 200 POST /auth/edge-token - "{\"farmId\":\"$FARM_A\",\"edgeProxyToken\":\"$PROXY_TOKEN\"}" -- "trade it for an edge JWT"
EDGE_JWT="$(json 'd["token"]')"
FRAMES="$WORK/frames.jsonl"; : > "$FRAMES"
FARM_ID="$FARM_A" REPORT_IDLE=fakep bun scripts/fake-gateway-serve.ts "ws://localhost:$PORT/ws/edge/v1" "$EDGE_JWT" 90 "$FRAMES" > "$WORK/gw.log" 2>&1 &
GW_PID=$!
for _ in $(seq 1 40); do grep -q ready "$WORK/gw.log" 2>/dev/null && break; sleep 0.25; done
grep -q ready "$WORK/gw.log" || fail "the stand-in gateway did not connect: $(cat "$WORK/gw.log")"
for _ in $(seq 1 40); do
  [ "$(psql_q "SELECT status FROM printers WHERE id='$PRINTER_A'")" = "idle" ] && break
  sleep 0.25
done
[ "$(psql_q "SELECT status FROM printers WHERE id='$PRINTER_A'")" = "idle" ] && ok "the printer reports idle" || fail "the printer never reported idle"

# --- 3. upload, dispatch, print --------------------------------------------

echo "==> upload a file through the presigned URL"
head -c 200000 /dev/urandom > "$WORK/cube.3mf"
WANT="$(sha256sum "$WORK/cube.3mf" | cut -d' ' -f1)"
expect 201 POST /jobs "$OWNER" "{\"farmId\":\"$FARM_A\",\"fileName\":\"cube.3mf\",\"contentType\":\"application/octet-stream\"}" -- "queue a job"
JOB_A="$(json 'd["job"]["id"]')"
OBJECT_KEY="$(json 'd["job"]["r2ObjectKey"]')"
UPLOAD_URL="$(json 'd["uploadUrl"]')"
cleanup_object() { [ -n "${OBJECT_KEY:-}" ] && bun -e "
import { s3 } from './src/s3';
import { DeleteObjectCommand } from '@aws-sdk/client-s3';
await s3.send(new DeleteObjectCommand({ Bucket: process.env.R2_BUCKET ?? 'continuum', Key: process.argv[1] }));
" "$OBJECT_KEY" >/dev/null 2>&1 || true; }
trap 'cleanup_object; cleanup' EXIT
CODE="$(curl -s -o /dev/null -w '%{http_code}' -X PUT -H 'Content-Type: application/octet-stream' --data-binary @"$WORK/cube.3mf" "$UPLOAD_URL")"
[ "$CODE" = "200" ] && ok "the file reached the object store (HTTP 200)" || fail "the upload returned HTTP $CODE"

echo "==> the scheduler dispatches it and the print runs to completion"
SEEN=""
for _ in $(seq 1 80); do
  STATUS="$(psql_q "SELECT status FROM print_jobs WHERE id='$JOB_A'")"
  case " $SEEN " in *" $STATUS "*) ;; *) SEEN="$SEEN $STATUS" ;; esac
  [ "$STATUS" = "completed" ] && break
  [ "$STATUS" = "failed" ] && break
  sleep 1
done
[ "$STATUS" = "completed" ] && ok "the job completed (saw:$SEEN)" || bad "the job ended as '$STATUS' (saw:$SEEN)"
case "$SEEN" in *printing*) ok "it was seen printing on the way" ;; *) bad "the job was never printing: $SEEN" ;; esac

python3 - "$FRAMES" "$WANT" <<'PYCHK' && ok "the gateway got start_print for this job, and downloaded exactly the bytes that were uploaded" || bad "the gateway's view does not match: $(cat "$FRAMES")"
import json,sys
frames=[json.loads(l) for l in open(sys.argv[1])]
start=[f for f in frames if f["type"]=="start_print"]
dl=[f for f in frames if f["type"]=="downloaded"]
assert len(start)==1, f"expected one start_print, got {len(start)}"
assert start[0]["file_name"]=="cube.3mf" and start[0]["printer_id"]=="fakep", start[0]
assert len(dl)==1 and dl[0]["sha256"]==sys.argv[2] and dl[0]["bytes"]==200000, dl
PYCHK

kill "$GW_PID" 2>/dev/null || true

echo
if [ "$FAILURES" -eq 0 ]; then
  echo "PASS - a file went from upload to a finished print, byte for byte, through every real component but the printer."
else
  echo "FAIL - $FAILURES assertion(s) failed." >&2
  exit 1
fi