#!/usr/bin/env bash
#
# End-to-end test of fdroid-update.sh: a throwaway index-signing keystore, a
# repo/ directory holding one already-signed fixture APK (from sign-apk.sh --
# binary-repo mode never builds or app-signs anything itself), a real
# `fdroid update` resolved through with-nixpkgs.sh/nixpkgs-pin.
#
# The fixture APK's AndroidManifest.xml is not real binary AXML -- building
# one needs aapt2, i.e. the Android SDK this repo deliberately avoids
# depending on. fdroidserver's own parser (androguard) rejects it and skips
# the app ("Failed to get APK information"), which is expected and asserted
# on below rather than hidden: what this test proves is the *indexing and
# index-signing* pipeline, which is what fdroid-update.sh exists for and
# what fdroid-repo-ci#1 asks to be verified -- "assert the index exists" --
# not that fdroidserver's manifest parser accepts a hand-built fixture.
set -euo pipefail
here=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
source "$here/test_lib.sh"

work=$(mktemp -d)
trap 'rm -rf "$work"' EXIT
cd "$work"
mkdir -p repo

echo "generating throwaway index keystore..."
bash "$here/with-nixpkgs.sh" jdk21 keytool -genkeypair \
  -keystore index.jks -storepass idxpass123 -keypass idxpass123 \
  -alias indexkey -keyalg RSA -keysize 2048 -validity 1 \
  -dname "CN=Index, OU=Test, O=Test, L=Test, S=Test, C=US" >/dev/null 2>&1
assert_file_exists "throwaway index keystore was created" index.jks

echo "signing a fixture APK with sign-apk.sh, to sit in repo/..."
bash "$here/with-nixpkgs.sh" jdk21 keytool -genkeypair \
  -keystore app.jks -storepass apppass123 -keypass apppass123 \
  -alias appkey -keyalg RSA -keysize 2048 -validity 1 \
  -dname "CN=App, OU=Test, O=Test, L=Test, S=Test, C=US" >/dev/null 2>&1
bash "$here/with-nixpkgs.sh" python3 python3 - "$work" <<'PYEOF'
import struct, sys, zipfile

def add_stored(zf, name, data, align=4):
    info = zipfile.ZipInfo(name)
    info.compress_type = zipfile.ZIP_STORED
    header_len = 30 + len(name.encode())
    start = zf.fp.tell() + header_len
    pad = (-start) % align
    if pad:
        if pad < 4:
            pad += align
        extra_len = pad - 4
        info.extra = struct.pack("<HH", 0xD935, extra_len) + b"\x00" * extra_len
    zf.writestr(info, data)

work = sys.argv[1]
with zipfile.ZipFile(f"{work}/unsigned.apk", "w") as zf:
    add_stored(zf, "AndroidManifest.xml", b"0123456789")
PYEOF
export APP_KS_PASS=apppass123
bash "$here/sign-apk.sh" unsigned.apk repo/com.example.testapp_1.apk app.jks appkey APP_KS_PASS \
  --min-sdk-version 21 --max-sdk-version 34 >/dev/null
assert_file_exists "fixture APK signed and placed in repo/" repo/com.example.testapp_1.apk

echo "--- fault: no repo/ directory is refused ---"
assert_failure "fdroid-update.sh refuses a root with no repo/" \
  bash "$here/fdroid-update.sh" "$work/does-not-have-repo" index.jks indexkey IDX_KS_PASS

echo "--- fault: missing password env var is refused ---"
assert_failure "fdroid-update.sh refuses when the password env var is unset" \
  env -u IDX_KS_PASS bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

export IDX_KS_PASS=idxpass123

echo "--- fault: missing FDROID_REPO_URL is refused (fdroid-repo-ci#11) ---"
assert_failure "fdroid-update.sh refuses when FDROID_REPO_URL is unset" \
  env -u FDROID_REPO_URL FDROID_REPO_NAME="weblib" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- fault: missing FDROID_REPO_NAME is refused (fdroid-repo-ci#11) ---"
assert_failure "fdroid-update.sh refuses when FDROID_REPO_NAME is unset" \
  env -u FDROID_REPO_NAME FDROID_REPO_URL="https://example.invalid" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- fault: FDROID_REPO_URL not ending in /repo is refused by fdroidserver itself ---"
assert_failure "fdroid-update.sh (fdroidserver) refuses a repo_url without the /repo suffix" \
  env FDROID_REPO_URL="https://fdroid-repo-ci-test.example.invalid" \
      FDROID_REPO_NAME="fdroid-repo-ci test repo" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- revert: a real run, needs no network ---"
export FDROID_REPO_URL="https://fdroid-repo-ci-test.example.invalid/repo"
export FDROID_REPO_NAME="fdroid-repo-ci test repo"
export FDROID_REPO_DESCRIPTION="a throwaway repo built by test_fdroid_update.sh"
assert_success "fdroid-update.sh runs fdroid update successfully" \
  bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

assert_file_exists "index-v2.json exists and is non-empty" repo/index-v2.json
assert_file_exists "index-v1.jar (signed index) exists and is non-empty" repo/index-v1.jar
assert_file_exists "entry.jar (signed entry, apksigner v1) exists and is non-empty" repo/entry.jar

echo "--- index-v2.json is valid JSON, not just a non-empty file ---"
assert_success "index-v2.json parses as JSON" \
  bash "$here/with-nixpkgs.sh" python3 python3 -c "import json; json.load(open('repo/index-v2.json'))"

echo "--- index-v2.json carries the repo metadata, not fdroidserver's placeholder ---"
assert_success "repo.address is FDROID_REPO_URL, not MyFirstFDroidRepo.org" \
  bash "$here/with-nixpkgs.sh" python3 python3 -c "
import json
repo = json.load(open('repo/index-v2.json'))['repo']
assert repo['address'] == 'https://fdroid-repo-ci-test.example.invalid/repo', repo['address']
assert repo['name']['en-US'] == 'fdroid-repo-ci test repo', repo['name']
assert repo['description']['en-US'] == 'a throwaway repo built by test_fdroid_update.sh', repo['description']
assert 'MyFirstFDroidRepo' not in json.dumps(repo)
"

echo "--- index-v1.jar is a validly signed jar (its own signature, not apksigner's) ---"
assert_success "jarsigner -verify accepts the signed index" \
  bash "$here/with-nixpkgs.sh" jdk21 jarsigner -verify repo/index-v1.jar

echo "--- config.yml never holds a literal password ---"
assert_failure "config.yml has no literal password (uses {env: ...} instead)" \
  grep -q "idxpass123" "$work/config.yml"

echo "--- a value with an embedded single quote survives config.yml round-trip ---"
export FDROID_REPO_NAME="bit's test repo"
assert_success "fdroid-update.sh accepts a name with an embedded quote" \
  bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS
assert_success "the quoted name round-trips through config.yml into index-v2.json" \
  bash "$here/with-nixpkgs.sh" python3 python3 -c "
import json
repo = json.load(open('repo/index-v2.json'))['repo']
assert repo['name']['en-US'] == \"bit's test repo\", repo['name']
"
export FDROID_REPO_NAME="fdroid-repo-ci test repo"

# --- FDROID_PREVIOUS_INDEX (weblib/weblib-viewer#95) ---
#
# The preservation itself is measured by test_preserve_added.py (unit) and,
# end to end, against a copy of the live dev index -- not here: this suite's
# fixture APK is deliberately not parseable by androguard (see the top of
# this file), so `fdroid update` indexes zero packages and there is no
# `added` date to preserve. What IS testable here is the part that runs
# before fdroidserver is ever reached: the contract that a set-but-wrong
# FDROID_PREVIOUS_INDEX aborts loudly rather than silently flattening every
# already-published build's history on the next publish.

echo "--- fault: FDROID_PREVIOUS_INDEX pointing at a file that does not exist is refused ---"
assert_failure "fdroid-update.sh refuses a FDROID_PREVIOUS_INDEX that does not exist" \
  env FDROID_PREVIOUS_INDEX="$work/never-fetched.json" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- fault: a truncated/garbage previous index is refused before fdroid update runs ---"
printf '%s' '{"packages": {"de.example' > "$work/truncated.json"
assert_failure "fdroid-update.sh refuses a previous index that is not valid JSON" \
  env FDROID_PREVIOUS_INDEX="$work/truncated.json" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- fault: valid JSON that is not an index (e.g. an S3 error document) is refused ---"
printf '%s' '{"error": "NoSuchKey"}' > "$work/notanindex.json"
assert_failure "fdroid-update.sh refuses a previous index with no top-level packages" \
  env FDROID_PREVIOUS_INDEX="$work/notanindex.json" \
    bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS

echo "--- a valid previous index is staged, survives the run, and is verified afterwards ---"
# An empty-but-well-formed index is exactly the shape a channel's
# first-ever publish would leave behind, and it proves the staged file does
# not confuse `fdroid update` -- which overwrites it -- while still being
# read back for the after-the-fact check.
printf '%s' '{"repo": {}, "packages": {}}' > "$work/prev-empty.json"
out="$work/prev-empty.log"
if env FDROID_PREVIOUS_INDEX="$work/prev-empty.json" \
     bash "$here/fdroid-update.sh" "$work" index.jks indexkey IDX_KS_PASS >"$out" 2>&1; then
  pass "fdroid-update.sh runs with FDROID_PREVIOUS_INDEX set"
else
  fail "fdroid-update.sh runs with FDROID_PREVIOUS_INDEX set"
  cat "$out" >&2
fi
assert_contains "the previous index was staged for fdroidserver to read" "$out" \
  "fdroid update will carry the 'added' date of 0 known build(s)"
assert_contains "the result was checked, not merely hoped for" "$out" \
  "already-published build(s) kept their original 'added' timestamp"

echo "--- and the staged copy never replaces the freshly generated index ---"
assert_success "index-v2.json after the run is the new one, not the staged previous one" \
  bash "$here/with-nixpkgs.sh" python3 python3 -c "
import json
index = json.load(open('repo/index-v2.json'))
assert index['repo']['address'] == 'https://fdroid-repo-ci-test.example.invalid/repo', index['repo']
"

report_and_exit