#!/usr/bin/env bash
# Milestone fieldtest — scenario 1: THE NEWCOMER CLI PATH
#
# A downstream user with nothing but the public docs (aura's rustdoc module
# blurb: "aura run bootstraps a built-in sample signal-quality harness ...
# prints the run's metrics + manifest as canonical JSON to stdout") invokes the
# real binary and checks the milestone promise end to end:
#   - a single-line JSON RunReport with the documented {manifest, metrics} shape
#   - exit 0
#   - byte-identical across two runs (C1 determinism)
#   - a NON-degenerate populated trace (C22 "newcomer sees a populated trace")
#   - the bad-args / usage contract
#
# Run from the repo root. Builds from HEAD first (never a stale artifact).
set -u
cd "$(git rev-parse --show-toplevel)"
cargo build -q -p aura-cli || { echo "BUILD FAILED"; exit 1; }
BIN=target/debug/aura

fail=0

A=$("$BIN" run); ea=$?
B=$("$BIN" run); eb=$?

echo "report: $A"
[ "$ea" -eq 0 ] && [ "$eb" -eq 0 ] || { echo "FAIL: run exit $ea/$eb (want 0)"; fail=1; }
[ "$A" = "$B" ] || { echo "FAIL: two runs differ (C1)"; fail=1; }
# single line: no embedded newline
[ "$(printf '%s' "$A" | wc -l)" -eq 0 ] || { echo "FAIL: not single-line"; fail=1; }
# documented shape
case "$A" in
  *'"manifest"'*'"metrics"'*'"total_pips"'*'"max_drawdown"'*'"exposure_sign_flips"'*) ;;
  *) echo "FAIL: missing documented {manifest,metrics} keys"; fail=1;;
esac
# NON-degenerate: at least one of the metrics is non-zero (a populated trace).
# The synthetic sample stream rises then reverses -> 1 sign flip, real drawdown.
case "$A" in
  *'"exposure_sign_flips":0'*) echo "FAIL: degenerate trace (0 sign flips)"; fail=1;;
esac

# bad-args contract: no subcommand and unknown subcommand -> exit 2, usage on
# stderr, empty stdout.
"$BIN" >/tmp/ms1_o 2>/tmp/ms1_e; e=$?
[ "$e" -eq 2 ] || { echo "FAIL: no-arg exit $e (want 2)"; fail=1; }
[ -s /tmp/ms1_o ] && { echo "FAIL: no-arg wrote stdout"; fail=1; }
grep -q usage /tmp/ms1_e || { echo "FAIL: no usage on stderr"; fail=1; }

"$BIN" frobnicate >/tmp/ms1_o 2>/tmp/ms1_e; e=$?
[ "$e" -eq 2 ] || { echo "FAIL: bad-subcmd exit $e (want 2)"; fail=1; }

# OBSERVED ANOMALY (recorded, not asserted): `aura run extra junk` -> exit 0,
# trailing args silently ignored. Documented as a spec_gap in the spec.
"$BIN" run extra junk >/tmp/ms1_o 2>/dev/null; echo "run+junk exit: $? (observed lenient)"

[ "$fail" -eq 0 ] && echo "SCENARIO 1: PASS" || echo "SCENARIO 1: FAIL"
exit "$fail"