#!/bin/bash
# validate-code-integrity.sh - EPIC-008
# Valida que el codigo funcional permanece intacto durante purga
# Version: 1.0.0

set -e

PROJECT=$1
MODE=$2
PROJECT_PATH="/home/isem/workspace-v1/projects/$PROJECT"
BACKUP_PATH="/home/isem/workspace-v1-bckp/projects/$PROJECT"
BASELINE_FILE="$PROJECT_PATH/.code-checksums.txt"

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

# Validar argumento
if [ -z "$PROJECT" ]; then
    echo -e "${RED}ERROR: Uso: $0 <proyecto> [--generate-baseline]${NC}"
    echo "Ejemplo: $0 gamilit"
    echo "Ejemplo: $0 gamilit --generate-baseline"
    exit 1
fi

# Validar proyecto existe
if [ ! -d "$PROJECT_PATH" ]; then
    echo -e "${RED}ERROR: Proyecto '$PROJECT' no existe${NC}"
    exit 1
fi

# Funcion para generar checksums de codigo
generate_checksums() {
    local path=$1
    local checksums=""

    # Archivos TypeScript/JavaScript en apps/
    if [ -d "$path/apps" ]; then
        checksums+=$(find "$path/apps" -type f \( -name "*.ts" -o -name "*.tsx" -o -name "*.js" -o -name "*.jsx" \) \
            ! -path "*/node_modules/*" ! -path "*/.next/*" ! -path "*/dist/*" ! -path "*/.turbo/*" \
            -exec md5sum {} \; 2>/dev/null | sort)
        checksums+=$'\n'
    fi

    # Archivos SQL en database/
    if [ -d "$path/database" ]; then
        checksums+=$(find "$path/database" -type f \( -name "*.sql" -o -name "*.ts" \) \
            -exec md5sum {} \; 2>/dev/null | sort)
    fi

    echo "$checksums"
}

# Modo: Generar baseline
if [ "$MODE" == "--generate-baseline" ]; then
    echo "=== GENERANDO BASELINE DE CHECKSUMS: $PROJECT ==="
    echo ""

    generate_checksums "$PROJECT_PATH" > "$BASELINE_FILE"

    total=$(wc -l < "$BASELINE_FILE" 2>/dev/null || echo 0)
    echo -e "${GREEN}Baseline guardado: $BASELINE_FILE${NC}"
    echo "Total archivos: $total"
    exit 0
fi

# Modo: Validacion
echo "=== VALIDACION DE INTEGRIDAD: $PROJECT ==="
echo ""

APPS_OK=true
DB_OK=true
CONFIGS_OK=true
TOTAL_DIFFS=0

# 1. Comparar apps/ con backup
echo "Comparando apps/..."
if [ -d "$BACKUP_PATH/apps" ] && [ -d "$PROJECT_PATH/apps" ]; then
    diff_output=$(diff -rq "$BACKUP_PATH/apps" "$PROJECT_PATH/apps" \
        --exclude="node_modules" --exclude=".next" --exclude="dist" --exclude=".turbo" \
        --exclude=".cache" --exclude="coverage" --exclude=".nyc_output" 2>&1 || true)

    if [ -z "$diff_output" ]; then
        echo -e "  apps/: ${GREEN}IDENTICO${NC}"
    else
        echo -e "  apps/: ${RED}DIFERENCIAS DETECTADAS${NC}"
        APPS_OK=false
        diff_count=$(echo "$diff_output" | wc -l)
        TOTAL_DIFFS=$((TOTAL_DIFFS + diff_count))
    fi
elif [ ! -d "$BACKUP_PATH/apps" ]; then
    echo -e "  apps/: ${YELLOW}NO EXISTE EN BACKUP${NC}"
else
    echo -e "  apps/: ${YELLOW}NO EXISTE EN PROYECTO${NC}"
fi

# 2. Comparar database/ con backup
echo "Comparando database/..."
if [ -d "$BACKUP_PATH/database" ] && [ -d "$PROJECT_PATH/database" ]; then
    diff_output=$(diff -rq "$BACKUP_PATH/database" "$PROJECT_PATH/database" 2>&1 || true)

    if [ -z "$diff_output" ]; then
        echo -e "  database/: ${GREEN}IDENTICO${NC}"
    else
        echo -e "  database/: ${RED}DIFERENCIAS DETECTADAS${NC}"
        DB_OK=false
        diff_count=$(echo "$diff_output" | wc -l)
        TOTAL_DIFFS=$((TOTAL_DIFFS + diff_count))
    fi
elif [ ! -d "$BACKUP_PATH/database" ]; then
    echo -e "  database/: ${YELLOW}NO EXISTE EN BACKUP (OK)${NC}"
else
    echo -e "  database/: ${YELLOW}NO EXISTE EN PROYECTO${NC}"
fi

# 3. Comparar archivos de configuracion
echo "Comparando configuraciones..."
for config in package.json tsconfig.json docker-compose.yml; do
    if [ -f "$BACKUP_PATH/$config" ] && [ -f "$PROJECT_PATH/$config" ]; then
        if diff -q "$BACKUP_PATH/$config" "$PROJECT_PATH/$config" > /dev/null 2>&1; then
            echo -e "  $config: ${GREEN}IDENTICO${NC}"
        else
            echo -e "  $config: ${YELLOW}DIFERENTE${NC}"
            # No marcamos como error, solo warning
        fi
    elif [ -f "$BACKUP_PATH/$config" ]; then
        echo -e "  $config: ${YELLOW}FALTA EN PROYECTO${NC}"
    fi
done

# Resultado final
echo ""
echo "=== RESULTADO ==="
if [ "$APPS_OK" = true ] && [ "$DB_OK" = true ]; then
    echo -e "${GREEN}PASS: Codigo funcional intacto${NC}"
    echo ""
    echo "Resumen:"
    echo "  apps/: OK"
    echo "  database/: OK"
    echo "  diferencias: 0"
    exit 0
else
    echo -e "${RED}FAIL: Se detectaron diferencias en codigo funcional${NC}"
    echo ""
    echo "Resumen:"
    echo "  apps/: $([ "$APPS_OK" = true ] && echo "OK" || echo "DIFERENCIAS")"
    echo "  database/: $([ "$DB_OK" = true ] && echo "OK" || echo "DIFERENCIAS")"
    echo "  total_diferencias: $TOTAL_DIFFS"
    echo ""
    echo -e "${YELLOW}ADVERTENCIA: Verificar manualmente antes de continuar${NC}"
    exit 1
fi