#!/usr/bin/env python3
import csv
import os

ROOT = "/home/carlos/projects/gem5"
OUT_DATA = os.path.join(ROOT, "gem5-data", "SmartEdgeAI", "results")
OUT_IOT = os.path.join(ROOT, "iot", "results")

src = os.path.join(OUT_DATA, "summary.csv")
dst_data = os.path.join(OUT_DATA, "summary_energy.csv")
dst_iot = os.path.join(OUT_IOT, "summary_energy.csv")

# Your model constants (document in Methods)
EPI_PJ = {"big": 200.0, "little": 80.0, "hybrid": 104.0}
E_MEM_PJ = 600.0
DROWSY_SCALE = 0.85

rows = []
if not os.path.exists(src):
    print(f"[energy] ERROR: Source file {src} does not exist")
    exit(1)

with open(src) as f:
    r = csv.DictReader(f)
    for row in r:
        # Handle empty or invalid values
        try:
            insts = float(row["insts"]) if row["insts"] else 0.0
            secs = float(row["sim_seconds"]) if row["sim_seconds"] else 0.0
            mr = float(row["l2_miss_rate"]) if row["l2_miss_rate"] else 0.0
        except (ValueError, TypeError):
            print(f"[energy] WARNING: Invalid data in row: {row}")
            insts = 0.0
            secs = 0.0
            mr = 0.0
            
        core = row["core"]
        drowsy = int(row["drowsy"]) if row["drowsy"] else 0
        epi = EPI_PJ.get(core, EPI_PJ["little"])

        l2_misses = mr * insts
        energy = (epi * 1e-12) * insts + (E_MEM_PJ * 1e-12) * l2_misses
        if drowsy == 1:
            energy *= DROWSY_SCALE
        power = energy / secs if secs > 0 else 0.0
        edp = energy * secs

        row.update(
            {
                "energy_J": f"{energy:.6f}",
                "power_W": f"{power:.6f}",
                "edp": f"{edp:.6e}",
                "epi_model_pJ": f"{epi:.1f}",
            }
        )
        rows.append(row)

if not rows:
    print(f"[energy] ERROR: No data found in {src}")
    exit(1)

for path in (dst_data, dst_iot):
    with open(path, "w", newline="") as f:
        w = csv.DictWriter(f, fieldnames=list(rows[0].keys()))
        w.writeheader()
        w.writerows(rows)
print(f"[energy] wrote {dst_data} and mirrored to {dst_iot}")