import json
import csv
import sys

if len(sys.argv) == 1:
    print("No file was provided")
else:
    trace_events = []
    call_stack = []
    with open(sys.argv[1], "r") as in_file:
        csv_reader = csv.reader(in_file, delimiter=',')
        for line in csv_reader:
            if line[0] == "->":
                call_stack.append(line)
            elif line[0] == "<-":
                call = call_stack.pop()
                trace_events.append({
                    "pid": 1,
                    "tid": 1,
                    "ts" : int(call[1]),
                    "dur": int(line[1])-int(call[1]),
                    "ph" : "X",
                    "name": call[2],
                    "args": {
                        "file": f"({call[3]}:{call[4]})"
                    }
                })
            else:
                print("invalid syntax")
                break
    with open("out.json", "w") as out_file:
        out_file.write(json.dumps({"traceEvents": trace_events}, indent=4))