"""Local PC/Steam/Proton control backend (xdotool/scrot wrappers)."""
import os
import subprocess
import time

import cv2

from ba_auto import config

PROBE_SHOT_PATH = os.path.join(config.SCRATCHPAD_DIR, "probe.png")


def run_command(args, **kwargs):
    kwargs.setdefault("env", config.ENV)
    kwargs.setdefault("check", True)
    return subprocess.run(args, **kwargs)


def focus_game():
    result = run_command(
        ["xdotool", "search", "--name", config.WINDOW_NAME],
        check=False, capture_output=True, text=True,
    )
    window_ids = result.stdout.split()
    if not window_ids:
        raise RuntimeError("Blue Archive window not found. Is the game running?")
    run_command(["xdotool", "windowactivate", window_ids[0]])
    wait(0.5)


def click(x, y):
    # A combined "mousemove X Y click 1" invocation is unreliable here --
    # empirically (see plan.md's click-flakiness writeups) the game's input
    # handler sometimes misses clicks fired before it's processed the move.
    # Splitting into separate commands with a short pause between fixes it.
    run_command(["xdotool", "mousemove", str(x), str(y)])
    wait(0.2)
    run_command(["xdotool", "click", "1"])
    wait(0.5)


def move_mouse(x, y):
    run_command(["xdotool", "mousemove", str(x), str(y)])


def scroll(x, y, direction, clicks=1):
    # xdotool button 4/5 = scroll wheel up/down. A drag (mousedown/move/mouseup)
    # does not register as a list-scroll gesture in this Proton client; the
    # wheel does.
    button = "4" if direction == "up" else "5"
    run_command(["xdotool", "mousemove", str(x), str(y)])
    wait(0.2)
    for _ in range(clicks):
        run_command(["xdotool", "click", button])
        wait(0.15)
    wait(0.3)


def keypress(key):
    run_command(["xdotool", "key", key])
    wait(0.5)


def screenshot(path):
    run_command(["scrot", "-a", "0,0,1920,1200", "-o", path])


def color_at(x, y):
    screenshot(PROBE_SHOT_PATH)
    image = cv2.imread(PROBE_SHOT_PATH)
    b, g, r = image[y, x]
    return int(r), int(g), int(b)


def wait(seconds):
    time.sleep(seconds)