#!/bin/bash
# test_install.sh - Test the install.sh script logic
#
# Tests version detection, URL construction, and error handling
# without requiring a published release.
#
# Usage:
#   ./scripts/test_install.sh
#
# Set GREYWALL_TEST_INSTALL_LIVE=1 to also test against a real release
# (requires a published release on Gitea).

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
INSTALL_SCRIPT="$SCRIPT_DIR/../install.sh"

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

PASSED=0
FAILED=0
SKIPPED=0

pass() { echo -e "Testing: $1... ${GREEN}PASS${NC}"; PASSED=$((PASSED + 1)); }
fail() { echo -e "Testing: $1... ${RED}FAIL${NC} ($2)"; FAILED=$((FAILED + 1)); }
skip() { echo -e "Testing: $1... ${YELLOW}SKIPPED${NC} ($2)"; SKIPPED=$((SKIPPED + 1)); }

echo "Install script: $INSTALL_SCRIPT"
echo "=============================================="

# ============================================================
echo ""
echo "=== Script Sanity ==="
echo ""

# Script exists and is executable
if [[ -f "$INSTALL_SCRIPT" ]]; then
    pass "install.sh exists"
else
    fail "install.sh exists" "file not found at $INSTALL_SCRIPT"
fi

if sh -n "$INSTALL_SCRIPT" 2>/dev/null; then
    pass "install.sh has valid shell syntax"
else
    fail "install.sh has valid shell syntax" "syntax error reported by sh -n"
fi

# ============================================================
echo ""
echo "=== Version Detection ==="
echo ""

# No releases → must fail with clean error (not malformed URL garbage)
output=$(sh "$INSTALL_SCRIPT" 2>&1) || true
if echo "$output" | grep -q "Error: Unable to determine version to install"; then
    pass "no releases → clean error message"
elif echo "$output" | grep -q "Not found\|null\|undefined"; then
    fail "no releases → clean error message" "leaked raw API/HTTP response: $output"
else
    # Could be passing if a real release now exists — check if it downloaded correctly
    if echo "$output" | grep -q "installed successfully"; then
        pass "no releases → clean error message (release exists, install succeeded)"
    else
        fail "no releases → clean error message" "unexpected output: $output"
    fi
fi

# Explicit version arg (v-prefixed) → used as-is
output=$(sh "$INSTALL_SCRIPT" v99.0.0 2>&1) || true
if echo "$output" | grep -q "v99.0.0"; then
    pass "explicit version (v-prefixed) passed through"
else
    fail "explicit version (v-prefixed) passed through" "version not found in output: $output"
fi

# Explicit version arg (no v prefix) → v added automatically
output=$(sh "$INSTALL_SCRIPT" 99.0.0 2>&1) || true
if echo "$output" | grep -q "v99.0.0"; then
    pass "explicit version (no v-prefix) gets v added"
else
    fail "explicit version (no v-prefix) gets v added" "output: $output"
fi

# GREYWALL_VERSION env var respected
output=$(GREYWALL_VERSION=99.1.0 sh "$INSTALL_SCRIPT" 2>&1) || true
if echo "$output" | grep -q "v99.1.0"; then
    pass "GREYWALL_VERSION env var respected"
else
    fail "GREYWALL_VERSION env var respected" "output: $output"
fi

# ============================================================
echo ""
echo "=== URL Construction ==="
echo ""

# Download URL must point to Gitea, not GitHub
output=$(sh "$INSTALL_SCRIPT" v1.2.3 2>&1) || true
if echo "$output" | grep -q "gitea.app.monadical.io"; then
    pass "download URL uses Gitea host"
else
    fail "download URL uses Gitea host" "output: $output"
fi

if echo "$output" | grep -q "github.com"; then
    fail "download URL does not use GitHub" "found github.com in output: $output"
else
    pass "download URL does not use GitHub"
fi

# URL contains the version, binary name, OS, and arch
OS_TITLE="Linux"
if [[ "$(uname -s)" == "Darwin" ]]; then OS_TITLE="Darwin"; fi
ARCH="x86_64"
if [[ "$(uname -m)" == "aarch64" || "$(uname -m)" == "arm64" ]]; then ARCH="arm64"; fi

if echo "$output" | grep -q "greywall_1.2.3_${OS_TITLE}_${ARCH}.tar.gz"; then
    pass "download URL has correct filename format"
else
    fail "download URL has correct filename format" "expected greywall_1.2.3_${OS_TITLE}_${ARCH}.tar.gz in: $output"
fi

# ============================================================
echo ""
echo "=== Error Handling ==="
echo ""

# Non-existent version → curl 404 → clean error, no crash
output=$(sh "$INSTALL_SCRIPT" v0.0.0-nonexistent 2>&1) || true
if echo "$output" | grep -q "Error: Failed to download release"; then
    pass "non-existent version → clean download error"
else
    fail "non-existent version → clean download error" "output: $output"
fi

# ============================================================
echo ""
echo "=== Live Install (optional) ==="
echo ""

if [[ "${GREYWALL_TEST_INSTALL_LIVE:-}" == "1" ]]; then
    # Check a release actually exists before attempting live install
    LATEST_TAG=$(curl -s "https://gitea.app.monadical.io/api/v1/repos/monadical/greywall/releases/latest" \
        2>/dev/null | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' || echo "")
    case "$LATEST_TAG" in
        v[0-9]*)
            TMP_BIN=$(mktemp -d)
            trap 'rm -rf "$TMP_BIN"' EXIT
            install_out=$(HOME="$TMP_BIN" sh "$INSTALL_SCRIPT" 2>&1) || true
            if echo "$install_out" | grep -q "installed successfully"; then
                if [[ -x "$TMP_BIN/.local/bin/greywall" ]]; then
                    pass "live install: binary downloaded and executable"
                    version_out=$("$TMP_BIN/.local/bin/greywall" --version 2>&1)
                    if echo "$version_out" | grep -qE '^greywall v?[0-9]'; then
                        pass "live install: binary runs and reports version"
                    else
                        fail "live install: binary runs and reports version" "output: $version_out"
                    fi
                else
                    fail "live install: binary downloaded and executable" "binary not found at $TMP_BIN/.local/bin/greywall"
                fi
            else
                fail "live install: install succeeded" "output: $install_out"
            fi
            ;;
        *)
            skip "live install (download + run binary)" "no releases published on Gitea yet"
            ;;
    esac
else
    skip "live install (download + run binary)" "set GREYWALL_TEST_INSTALL_LIVE=1 to enable"
fi

# ============================================================
echo ""
echo "=============================================="
echo ""
echo -e "Results: ${GREEN}$PASSED passed${NC}, ${RED}$FAILED failed${NC}, ${YELLOW}$SKIPPED skipped${NC}"
echo ""

[[ $FAILED -eq 0 ]]