"""底部公会按钮上方的互助领取流程。"""
import time
from .engine import WorkflowError


class GuildHelpRunner:
    def __init__(self, desktop, matcher, flow, region_provider, log=print, timeout=12):
        self.desktop, self.matcher, self.flow = desktop, matcher, flow
        self.region_provider, self.log, self.timeout = region_provider, log, timeout

    def observe(self):
        shot = self.desktop.screenshot(); region = self.region_provider(shot)
        return shot, region, self.matcher.frame(shot, region)

    def wait_reward(self):
        deadline = time.monotonic() + self.timeout; stable = 0
        while time.monotonic() < deadline:
            shot, region, frame = self.observe()
            if self.matcher.matches(frame, self.flow['reward']):
                stable += 1
                if stable >= 2: return shot, region
            else: stable = 0
            time.sleep(.25)
        raise WorkflowError('互助后未识别到奖励弹框，已停止。')

    def run(self, dry_run=False):
        shot, region, frame = self.observe()
        spec = self.flow['help_button']; score, location = self.matcher.locate(frame, spec)
        if score < spec.get('threshold', .86):
            self.log('当前一级页面没有互助握手入口，本次跳过。'); return 'no_help'
        x, y, width, height = location
        point = ((x + width / 2) / 562, (y + height / 2) / 1002)
        if dry_run:
            self.log('已识别互助握手入口，计划点击并关闭奖励弹框。未点击。'); return 'preview'
        if self.region_provider(shot) != region: raise WorkflowError('识别后游戏窗口移动，已停止，请重新运行。')
        self.desktop.click(point, region, shot.size, hold=.8); self.log('已执行：互助。')
        reward_shot, reward_region = self.wait_reward()
        if self.region_provider(reward_shot) != reward_region: raise WorkflowError('识别后游戏窗口移动，已停止，请重新运行。')
        self.desktop.click(self.flow['clicks']['dismiss_reward'], reward_region, reward_shot.size, hold=.8)
        self.log('已确认互助奖励并关闭弹框。'); return 'claimed'