#!/bin/bash
#
# 檢查系統資源使用狀況
#

echo "=========================================="
echo "  System Resource Check"
echo "=========================================="
echo ""

# CPU 資訊
echo "[1/5] CPU Information:"
lscpu | grep -E "^CPU\(s\)|^Model name|^Thread"
echo ""

# 記憶體使用
echo "[2/5] Memory Usage:"
free -h
echo ""

# 磁碟使用
echo "[3/5] Disk Usage:"
df -h | grep -E "^Filesystem|/$|/data"
echo ""

# Docker 資源使用
echo "[4/5] Docker Resource Usage:"
docker stats --no-stream --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}"
echo ""

# PostgreSQL 容器資源
echo "[5/5] PostgreSQL Containers:"
docker ps --filter "ancestor=postgres:16-alpine" --format "table {{.Names}}\t{{.Status}}\t{{.Size}}"
echo ""

echo "=========================================="
echo "  Resource Summary"
echo "=========================================="
echo ""

# 計算 PostgreSQL 容器數量和總記憶體
PG_COUNT=$(docker ps | grep postgres | wc -l)
echo "Current PostgreSQL containers: $PG_COUNT"
echo ""

# 預估資源需求
echo "Estimated resource requirements:"
echo ""
echo "Option A: Shared PostgreSQL (1 container)"
echo "  ├── CPU: ~2-5%"
echo "  ├── Memory: ~100-200 MB"
echo "  └── Disk: ~500 MB"
echo ""
echo "Option B: Microservices (3 containers)"
echo "  ├── CPU: ~6-15%"
echo "  ├── Memory: ~300-600 MB"
echo "  └── Disk: ~1.5 GB"
echo ""

# 系統規格回顧
echo "Your Ubuntu Server specs:"
echo "  ├── CPU: 12th Gen Intel Core i5-12400F"
echo "  ├── RAM: 32 GB"
echo "  └── Storage: SSD 216GB + HDD 931GB"
echo ""
echo "Recommendation: You have MORE than enough resources!"
echo "                Both options are viable."
echo ""