#!/bin/sh
# test/check-syntax.sh — static syntax checks for noctalia-greeter
# No runtime required. Run from repo root or any location.
set -e

REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
PASS=0
FAIL=0

ok()   { echo "  [PASS] $1"; PASS=$((PASS+1)); }
fail() { echo "  [FAIL] $1"; echo "         $2"; FAIL=$((FAIL+1)); }

echo "=== noctalia-greeter syntax checks ==="
echo ""

# ── Shell scripts ──────────────────────────────────────────────────────────────
echo "-- Shell syntax (bash -n) --"

for f in \
    "sync/noctalia-greeter-sync" \
    "sync/run" \
    "greetd/start-greeter.sh" \
    "install.sh"
do
    path="$REPO_DIR/$f"
    if [ ! -f "$path" ]; then
        fail "$f" "file not found: $path"
    elif out=$(bash -n "$path" 2>&1); then
        ok "$f"
    else
        fail "$f" "$out"
    fi
done

# ── Embedded Python snippet ────────────────────────────────────────────────────
echo ""
echo "-- Python snippet in noctalia-greeter-sync --"

SYNC="$REPO_DIR/sync/noctalia-greeter-sync"
if [ -f "$SYNC" ]; then
    # Extract python3 heredoc: lines between 'python3 -c "' and closing '"'
    PY_SNIPPET=$(sed -n '/python3 -c "/,/^" /{ /python3 -c "/d; /^" /d; p }' "$SYNC")
    if [ -n "$PY_SNIPPET" ]; then
        if out=$(echo "$PY_SNIPPET" | python3 -c "
import ast, sys
src = sys.stdin.read()
try:
    ast.parse(src)
    print('ok')
except SyntaxError as e:
    print('SyntaxError: ' + str(e))
    sys.exit(1)
" 2>&1); then
            ok "embedded python snippet (ast.parse)"
        else
            fail "embedded python snippet" "$out"
        fi
    else
        fail "embedded python snippet" "could not extract snippet from $SYNC"
    fi
else
    fail "embedded python snippet" "sync script not found"
fi

# ── Niri config ────────────────────────────────────────────────────────────────
echo ""
echo "-- Niri config (niri validate) --"

KDL="$REPO_DIR/greetd/niri-greeter.kdl"
if [ ! -f "$KDL" ]; then
    fail "niri-greeter.kdl" "file not found"
elif ! command -v niri >/dev/null 2>&1; then
    echo "  [SKIP] niri-greeter.kdl — niri not in PATH"
elif out=$(niri validate -c "$KDL" 2>&1); then
    ok "niri-greeter.kdl"
else
    fail "niri-greeter.kdl" "$out"
fi

# ── QML structural check ───────────────────────────────────────────────────────
echo ""
echo "-- QML structural check --"

QML="$REPO_DIR/shell.qml"
if [ ! -f "$QML" ]; then
    fail "shell.qml" "file not found"
elif command -v qmllint >/dev/null 2>&1; then
    if out=$(qmllint "$QML" 2>&1); then
        ok "shell.qml (qmllint)"
    else
        fail "shell.qml (qmllint)" "$out"
    fi
else
    # Fallback: brace/bracket balance via Python
    if out=$(python3 - "$QML" << 'EOF'
import sys

path = sys.argv[1]
src = open(path).read()
depth = 0
in_str = False
str_char = None
i = 0
errors = []

while i < len(src):
    c = src[i]
    if in_str:
        if c == '\\':
            i += 2
            continue
        if c == str_char:
            in_str = False
    else:
        if c in ('"', "'"):
            in_str = True
            str_char = c
        elif c == '{':
            depth += 1
        elif c == '}':
            depth -= 1
            if depth < 0:
                line = src[:i].count('\n') + 1
                errors.append(f"line {line}: unexpected '}}' (depth went negative)")
                depth = 0
    i += 1

if depth != 0:
    errors.append(f"unbalanced braces: depth={depth} at EOF")

# Check imports present
required = ["import Quickshell", "Quickshell.Services.Greetd", "ShellRoot"]
for r in required:
    if r not in src:
        errors.append(f"missing expected token: '{r}'")

if errors:
    for e in errors:
        print(e)
    sys.exit(1)
else:
    print("ok")
EOF
    2>&1); then
        ok "shell.qml (brace balance + required imports)"
    else
        fail "shell.qml" "$out"
    fi
fi

# ── Required files present ─────────────────────────────────────────────────────
echo ""
echo "-- Required files present --"

for f in \
    "shell.qml" \
    "sync/noctalia-greeter-sync" \
    "sync/run" \
    "greetd/niri-greeter.kdl" \
    "greetd/start-greeter.sh" \
    "greetd/config.toml.example" \
    "install.sh" \
    "README.md"
do
    path="$REPO_DIR/$f"
    if [ -f "$path" ]; then
        ok "$f exists"
    else
        fail "$f" "missing: $path"
    fi
done

# ── Permissions check ──────────────────────────────────────────────────────────
echo ""
echo "-- Executable bits --"

for f in \
    "sync/noctalia-greeter-sync" \
    "sync/run" \
    "greetd/start-greeter.sh" \
    "install.sh"
do
    path="$REPO_DIR/$f"
    if [ ! -f "$path" ]; then
        fail "$f" "not found"
    elif [ -x "$path" ]; then
        ok "$f is executable"
    else
        fail "$f" "not executable (chmod +x $path)"
    fi
done

# ── Summary ────────────────────────────────────────────────────────────────────
echo ""
echo "=== Results: $PASS passed, $FAIL failed ==="

[ "$FAIL" -eq 0 ]