#!/bin/bash
# master_test_run.sh — 测试三个 case 的 t00 全流程
# 步骤: 生成初始条件 → blockMesh → interFoam → 验证 → 后处理 HDF5

set -euo pipefail

WORKSPACE="/home/alanz/openfoam-workspace"
SCRIPTS="$WORKSPACE/scripts"
TEST_DIR="/tmp/test_run"
CASES=("dam_break" "rising_bubble" "droplet_impact")

# ─── OpenFOAM 环境 ───────────────────────────────────────────────────
export WM_PROJECT=OpenFOAM
export WM_PROJECT_VERSION=v1906
export WM_PROJECT_DIR=/usr/share/openfoam
export FOAM_ETC=/usr/share/openfoam/etc
export FOAM_APPBIN=/usr/bin
export FOAM_LIBBIN=/usr/lib
export PATH=$FOAM_APPBIN:$PATH
export LD_LIBRARY_PATH=$FOAM_LIBBIN:$LD_LIBRARY_PATH

echo "============================================================"
echo "master_test_run.sh — 三 case t00 全流程测试"
echo "时间: $(date)"
echo "============================================================"

# ─── Step 1: 生成初始条件 ────────────────────────────────────────────
echo ""
echo "=== Step 1: 生成初始条件 (num-trajs=1) ==="
rm -rf "$TEST_DIR"
python3 "$SCRIPTS/gen_init_conditions.py" \
    --templates "$WORKSPACE/cases" \
    --output "$TEST_DIR" \
    --num-trajs 1 \
    -v 2>&1

# ─── Step 2: 验证 alpha ─────────────────────────────────────────────
echo ""
echo "=== Step 2: 验证三个 case 的 alpha.water ==="
for case in "${CASES[@]}"; do
    alpha_file="$TEST_DIR/$case/t00/0/alpha.water"
    if [ ! -f "$alpha_file" ]; then
        echo "ERROR: $alpha_file 不存在"
        exit 1
    fi

    python3 -c "
with open('$alpha_file') as f:
    lines = f.readlines()
vals = []
in_data = False
for line in lines:
    s = line.strip()
    if s == '(':
        in_data = True
        continue
    if s == ')' or s == ');':
        break
    if in_data:
        try:
            vals.append(float(s))
        except:
            pass
nonzero = sum(1 for v in vals if v > 0)
print(f'  $case: {len(vals)} cells, {nonzero} nonzero, sum={sum(vals):.0f}')
if nonzero == 0 and '$case' == 'droplet_impact':
    print('  ERROR: droplet_impact alpha 全为 0!')
    exit(1)
" 2>&1
done

# ─── Step 3: 运行 OpenFOAM ──────────────────────────────────────────
echo ""
echo "=== Step 3: 运行 OpenFOAM interFoam ==="
for case in "${CASES[@]}"; do
    case_dir="$TEST_DIR/$case/t00"
    echo ""
    echo "--- $case/t00 ---"
    cd "$case_dir"

    # 清理旧数据
    rm -f log.*
    rm -rf processor*
    for ts_dir in [0-9]*; do
        ts_name=$(basename "$ts_dir")
        if [ "$ts_name" != "0" ]; then
            rm -rf "$ts_dir"
        fi
    done

    # blockMesh
    echo "  blockMesh..."
    blockMesh > log.blockMesh 2>&1
    if [ $? -ne 0 ]; then
        echo "  ERROR: blockMesh failed"
        tail -20 log.blockMesh
        exit 1
    fi
    echo "  blockMesh OK"

    # interFoam
    echo "  interFoam (开始运行)..."
    START_T=$(date +%s)
    interFoam > log.interFoam 2>&1
    END_T=$(date +%s)
    ELAPSED=$((END_T - START_T))

    if [ $? -ne 0 ]; then
        echo "  ERROR: interFoam failed (${ELAPSED}s)"
        tail -20 log.interFoam
        exit 1
    fi

    # 验证完成标记
    if grep -q "^End" log.interFoam; then
        echo "  interFoam OK (${ELAPSED}s) — End 标记确认"
    else
        echo "  WARNING: 未找到 End 标记 (${ELAPSED}s)"
        tail -5 log.interFoam
    fi

    # 统计时间步目录
    N_DIRS=$(ls -d [0-9]* 2>/dev/null | grep -v "^0$" | wc -l)
    echo "  输出时间步: $N_DIRS"
done

# ─── Step 4: 后处理 HDF5 ────────────────────────────────────────────
echo ""
echo "=== Step 4: 后处理 HDF5 ==="
python3 "$SCRIPTS/postprocess_to_hdf5.py" \
    --input "$TEST_DIR" \
    -v 2>&1

# ─── Step 5: 验证 HDF5 ─────────────────────────────────────────────
echo ""
echo "=== Step 5: 验证 HDF5 输出 ==="
for case in "${CASES[@]}"; do
    h5_file="$TEST_DIR/$case/traj_0000.h5"
    if [ -f "$h5_file" ]; then
        python3 -c "
import h5py
with h5py.File('$h5_file', 'r') as f:
    alpha = f['alpha']
    times = f.attrs.get('times', [])
    print(f'  $case: shape={alpha.shape}, times={len(times)} frames')
    print(f'    alpha range: [{alpha[:].min():.4f}, {alpha[:].max():.4f}]')
    if len(times) > 1:
        print(f'    t range: [{times[0]:.4f}, {times[-1]:.4f}] s')
" 2>&1
    else
        echo "  ERROR: $h5_file 不存在"
    fi
done

echo ""
echo "============================================================"
echo "master_test_run.sh 完成"
echo "时间: $(date)"
echo "测试数据: $TEST_DIR"
echo "============================================================"