import sys
import time
from pathlib import Path

import httpx
import psutil
import psycopg

from com import FilterAction, eval_config, parse_graph, progressbar

config = eval_config()
conn: psycopg.Connection = config["connect"]()
token: str = config["token"]
api: str = config["api"]

graph = parse_graph()
print("reading filterlist")
filtered = Path("filtered.list").read_text().strip().splitlines()
filtered = list(map(lambda line: line.split(' '), filtered))

print("building queue")
queue = []

def enqueue(note, action):
    for reply in note["replies"]:
        enqueue(graph[reply], action)
    for quote in note["quotes"]:
        enqueue(graph[quote], action)
    if "self" in note["flags"]:
        queue.append((note["id"], action))

for id, action in filtered:
    enqueue(graph[id], FilterAction(action))

class CustomETA(progressbar.ETA):
    def __init__(self, *args, **kwargs):
        self.history = []
        self.lastval = None
        progressbar.ETA.__init__(self, *args, **kwargs)

    def _calculate_eta(self, progress, data, value, elapsed):
        if self.lastval != value:
            self.history = [*self.history[-9:], elapsed.total_seconds()]
            self.lastval = value
        per_item = (self.history[-1] - self.history[0]) / len(self.history)
        remaining = (progress.max_value - value) * per_item
        spent = elapsed.total_seconds() - self.history[-1]
        return max(remaining - spent, 0)

pb = progressbar.ProgressBar(
    0,
    len(queue),
    widgets=[
        progressbar.Variable("message", format="{formatted_value}"),
        " ",
        progressbar.Percentage(),
        " ",
        progressbar.Bar(),
        " ",
        progressbar.SimpleProgress("%(value_s)s/%(max_value_s)s"),
        " ",
        CustomETA(),
    ],
    variables={"status": "work"}
)
pb.update(0) # force initial display
client = httpx.Client(timeout=60)
seeking = False
last_req = 0

for note, action in queue:

    # seek through queue
    # helps prevent rate limits on resumed deletions
    if seeking:
        while True:
            resp = client.post(f"{api}/notes/show", json={
                "i": token,
                "noteId": note,
            })
            if resp.status_code == 502:
                pb.update(message="down")
                time.sleep(1)
                continue
            break
        if resp.status_code == 404:
            pb.increment(message="seeking")
            continue
        seeking = False

    # wait for queue to empty
    while True:
        resp = client.post(f"{api}/admin/queue/stats", json={"i": token})
        if resp.status_code == 502:
            pb.update(message="down")
            time.sleep(1)
            continue
        Path('queue-stats.dump').write_text(f"status:{resp.status_code}\nbody:\n{resp.text}")
        deliver_waiting = resp.json()["deliver"]["waiting"]
        obliterate_waiting = resp.json()["obliterate"]["waiting"]
        if deliver_waiting < 100 and obliterate_waiting < 50000:
            break
        pb.update(message=f"queue ({deliver_waiting}/{obliterate_waiting})")
        time.sleep(10)

    # make sure there's enough memory for new jobs
    while True:
        vmem = psutil.virtual_memory()
        if vmem.available > (512 * 1024 * 1024):
            break
        pb.update(message="memory")
        time.sleep(10)

    # prevent api rate limiting
    req_delay = time.time() - last_req
    if req_delay < 30:
        pb.update(message="delaying")
        time.sleep(req_delay)

    # queue new deletions
    err = 0
    while True:
        resp = client.post(f"{api}/notes/delete", json={
            "i": token,
            "noteId": note,
            "obliterate": action == FilterAction.Obliterate,
        })
        if resp.status_code == 429:
            pb.update(status="limit")
            time.sleep(1)
            continue
        elif resp.status_code == 502:
            pb.update(status="down")
            time.sleep(1)
            continue
        elif resp.status_code >= 400:
            body = resp.json()
            if body["error"]["code"] == "NO_SUCH_NOTE":
                pb.increment(message="seeking")
                seeking = True
                break
            elif body["error"]["code"] == "QUEUE_FULL":
                print("\nobliterate queue overflowed, exiting to save server")
                break
            err += 1
            if err > 3:
                raise Exception(f"{body['error']['code']}: {body['error']['message']}")
            sys.stdout.write("\r")
            print(f"err {body['error']['code']} {body['error']['message']} ")
            time.sleep(30)
        pb.increment(message="deleting")
        last_req = time.time()
        break

pb.finish()