#!/usr/bin/env bash
set -euo pipefail

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

pass() { echo "  PASS: $1"; PASS=$((PASS + 1)); }
fail() { echo "  FAIL: $1"; FAIL=$((FAIL + 1)); }

TEMP_HOME="$(mktemp -d)"
trap 'rm -rf "$TEMP_HOME"' EXIT

echo "Running install.sh..."
HOME="$TEMP_HOME" bash "$REPO_ROOT/scripts/install.sh" > /dev/null

echo ""
echo "--- providers/claude-code/ → ~/.claude/ ---"
while IFS= read -r -d '' src; do
    rel="${src#"$REPO_ROOT/providers/claude-code/"}"
    [[ "$rel" == "provider-manifest.sh" ]] && continue
    dest="$TEMP_HOME/.claude/$rel"
    if diff -q "$src" "$dest" > /dev/null 2>&1; then
        pass "$rel deployed and matches source"
    else
        fail "$rel — missing or differs from source"
    fi
done < <(find "$REPO_ROOT/providers/claude-code" -type f -print0)

echo ""
echo "--- core/ → ~/.claude/core/ ---"
while IFS= read -r -d '' src; do
    rel="${src#"$REPO_ROOT/core/"}"
    dest="$TEMP_HOME/.claude/core/$rel"
    if diff -q "$src" "$dest" > /dev/null 2>&1; then
        pass "$rel deployed and matches source"
    else
        fail "$rel — missing or differs from source"
    fi
done < <(find "$REPO_ROOT/core" -type f -print0)

echo ""
echo "--- no orphaned files in core/ ---"
while IFS= read -r -d '' deployed; do
    rel="${deployed#"$TEMP_HOME/.claude/core/"}"
    src="$REPO_ROOT/core/$rel"
    if [[ -f "$src" ]]; then
        pass "core/$rel has a source file"
    else
        fail "core/$rel is orphaned — deleted from source but still deployed"
    fi
done < <(find "$TEMP_HOME/.claude/core" -type f -print0)

echo ""
echo "--- core/AGENTS.md → ~/.agents/AGENTS.md (0015) ---"
if diff -q "$REPO_ROOT/core/AGENTS.md" "$TEMP_HOME/.agents/AGENTS.md" > /dev/null 2>&1; then
    pass "core/AGENTS.md deployed and matches source"
else
    fail "\$HOME/.agents/AGENTS.md — missing or differs from source"
fi

echo ""
echo "--- idempotency: second run state is correct ---"
if HOME="$TEMP_HOME" bash "$REPO_ROOT/scripts/install.sh" > /dev/null 2>&1; then
    pass "second run exits zero"
else
    fail "second run failed"
fi

# AGENTS.md still correct after second run
if diff -q "$REPO_ROOT/core/AGENTS.md" "$TEMP_HOME/.agents/AGENTS.md" > /dev/null 2>&1; then
    pass "idempotent: ~/.agents/AGENTS.md correct after second install"
else
    fail "idempotent: ~/.agents/AGENTS.md corrupted after second install"
fi

echo ""
echo "Results: $PASS passed, $FAIL failed"
[[ $FAIL -eq 0 ]]