#!/bin/bash
################################################################################
# Integration Test Suite for WordPress Cron Manager
# Purpose: Validate script functionality and catch regressions
################################################################################

SCRIPT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/modules/website/wordpress/wordpress-cron-manager.sh"
TEST_COUNT=0
PASSED_COUNT=0
FAILED_COUNT=0

# Color codes
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

test_start() {
    TEST_COUNT=$((TEST_COUNT + 1))
    echo -e "\n${BLUE}[TEST $TEST_COUNT]${NC} $1"
}

test_pass() {
    PASSED_COUNT=$((PASSED_COUNT + 1))
    echo -e "${GREEN}✓ PASS${NC}: $1"
}

test_fail() {
    FAILED_COUNT=$((FAILED_COUNT + 1))
    echo -e "${RED}✗ FAIL${NC}: $1"
}

test_info() {
    echo -e "${YELLOW}ℹ${NC} $1"
}

# Test 1: Script exists
test_script_exists() {
    test_start "Script file exists"
    if [ -f "$SCRIPT" ]; then
        test_pass "Script found at: $SCRIPT"
    else
        test_fail "Script not found: $SCRIPT"
    fi
}

# Test 2: Script is executable
test_script_executable() {
    test_start "Script is executable"
    if [ -x "$SCRIPT" ]; then
        test_pass "Script has execute permission"
    else
        test_fail "Script is not executable"
        return 1
    fi
}

# Test 3: Bash syntax validation
test_bash_syntax() {
    test_start "Bash syntax validation"
    if bash -n "$SCRIPT" 2>/dev/null; then
        test_pass "No syntax errors"
    else
        test_fail "Syntax errors detected"
        bash -n "$SCRIPT" 2>&1 | head -5
        return 1
    fi
}

# Test 4: Help flag works
test_help_flag() {
    test_start "Help flag functionality (--help)"
    output=$($SCRIPT --help 2>&1 | head -5)
    if echo "$output" | grep -q "Usage"; then
        test_pass "Help output generated"
    else
        test_fail "Help flag not working properly"
        return 1
    fi
}

# Test 5: Grep for key functions (non-execution test)
test_functions_defined() {
    test_start "Key functions defined in script"
    local functions="initialize_wp_cache get_wp_search_paths validate_wordpress_site is_empty is_set"
    local missing=0
    
    for func in $functions; do
        if grep -q "^$func()" "$SCRIPT"; then
            test_info "✓ Found function: $func"
        else
            test_fail "Missing function: $func"
            missing=$((missing + 1))
        fi
    done
    
    if [ $missing -eq 0 ]; then
        test_pass "All key functions defined"
    else
        test_fail "$missing functions missing"
        return 1
    fi
}

# Test 6: Check for helper functions
test_helper_functions_defined() {
    test_start "Helper functions defined"
    local helpers="is_file_valid is_user_valid is_wp_configured is_cron_job_exists has_sufficient_disk_space"
    local count=0
    
    for helper in $helpers; do
        if grep -q "^$helper()" "$SCRIPT"; then
            count=$((count + 1))
        fi
    done
    
    if [ $count -ge 3 ]; then
        test_pass "Helper functions defined ($count/5)"
    else
        test_fail "Insufficient helper functions ($count/5)"
    fi
}

# Test 7: Error code constants
test_error_codes_defined() {
    test_start "Error code constants defined"
    if grep -q "ERR_SUCCESS\|ERR_INVALID_USER\|ERR_FILE_NOT_FOUND" "$SCRIPT"; then
        test_pass "Error code constants found"
    else
        test_fail "Error code constants not found"
        return 1
    fi
}

# Test 8: Report generation functions
test_report_functions() {
    test_start "Report generation functions"
    local funcs="generate_json_report generate_csv_report report_save"
    local count=0
    
    for func in $funcs; do
        if grep -q "^$func()" "$SCRIPT"; then
            count=$((count + 1))
        fi
    done
    
    if [ $count -eq 3 ]; then
        test_pass "Report functions defined ($count/3)"
    else
        test_fail "Report functions incomplete ($count/3)"
    fi
}

# Test 9: Rollback functions
test_rollback_functions() {
    test_start "Rollback support functions"
    local funcs="rollback_init rollback_create_checkpoint rollback_all"
    local count=0
    
    for func in $funcs; do
        if grep -q "^$func()" "$SCRIPT"; then
            count=$((count + 1))
        fi
    done
    
    if [ $count -eq 3 ]; then
        test_pass "Rollback functions defined ($count/3)"
    else
        test_fail "Rollback functions incomplete ($count/3)"
    fi
}

# Test 10: Configuration support
test_config_support() {
    test_start "Configuration file support"
    if grep -q "load_config_file\|/etc/wordpress-cron-manager.conf" "$SCRIPT"; then
        test_pass "Configuration file support implemented"
    else
        test_fail "Configuration file support not found"
        return 1
    fi
}

# Test 11: Progress tracking
test_progress_tracking() {
    test_start "Progress tracking functions"
    local funcs="show_progress show_progress_bar show_spinner"
    local count=0
    
    for func in $funcs; do
        if grep -q "^$func()" "$SCRIPT"; then
            count=$((count + 1))
        fi
    done
    
    if [ $count -ge 2 ]; then
        test_pass "Progress tracking defined ($count/3)"
    else
        test_fail "Progress tracking incomplete ($count/3)"
    fi
}

# Test 12: Regex helpers
test_regex_helpers() {
    test_start "Regex pattern helpers"
    local helpers="grep_wp_config_define grep_disabled_wp_cron grep_in_crontab"
    local count=0
    
    for helper in $helpers; do
        if grep -q "^$helper()" "$SCRIPT"; then
            count=$((count + 1))
        fi
    done
    
    if [ $count -eq 3 ]; then
        test_pass "Regex helpers defined ($count/3)"
    else
        test_fail "Regex helpers incomplete ($count/3)"
    fi
}

# Test 13: Function registry
test_function_registry() {
    test_start "Function registry metadata"
    if grep -q "FUNCTION_REGISTRY" "$SCRIPT"; then
        test_pass "Function registry implemented"
    else
        test_fail "Function registry not found"
        return 1
    fi
}

# Test 14: Line count (sanity check)
test_script_size() {
    test_start "Script size sanity check"
    local lines=$(wc -l < "$SCRIPT")
    if [ "$lines" -gt 2000 ]; then
        test_pass "Script size reasonable: $lines lines"
    else
        test_fail "Script size too small: $lines lines (expected >2000)"
    fi
}

# Test 15: Git commits
test_git_history() {
    test_start "Optimization commits in git history"
    local opt_commits=$(cd "$(dirname $SCRIPT)/../../../" && git log --oneline | grep -c "OPTIMIZE\|ADVANCED")
    if [ $opt_commits -gt 5 ]; then
        test_pass "Multiple optimization commits found: $opt_commits"
    else
        test_fail "Insufficient optimization commits: $opt_commits"
    fi
}

# Summary
print_summary() {
    echo ""
    echo "================================================================================"
    echo "INTEGRATION TEST SUMMARY"
    echo "================================================================================"
    echo "Total Tests: $TEST_COUNT"
    echo -e "${GREEN}Passed: $PASSED_COUNT${NC}"
    echo -e "${RED}Failed: $FAILED_COUNT${NC}"
    
    if [ $FAILED_COUNT -eq 0 ]; then
        echo -e "\n${GREEN}✓ ALL TESTS PASSED${NC}"
        return 0
    else
        echo -e "\n${RED}⚠ SOME TESTS FAILED (but script may still work)${NC}"
        return 1
    fi
}

# Main execution
echo "================================================================================"
echo "WordPress Cron Manager - Integration Test Suite"
echo "================================================================================"

test_script_exists
test_script_executable
test_bash_syntax
test_help_flag
test_functions_defined
test_helper_functions_defined
test_error_codes_defined
test_report_functions
test_rollback_functions
test_config_support
test_progress_tracking
test_regex_helpers
test_function_registry
test_script_size
test_git_history

print_summary