"""狂鼠之家收矿与雇佣流程。"""
import time

from .engine import WorkflowError


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

    def wait(self, *names, timeout=None):
        deadline = time.monotonic() + (timeout or self.timeout)
        previous, stable = None, 0
        while time.monotonic() < deadline:
            screenshot = self.desktop.screenshot()
            region = self.region_provider(screenshot)
            frame = self.matcher.frame(screenshot, region)
            found = next((name for name in names
                          if self.matcher.matches(frame, self.flow['states'][name])), None)
            stable = stable + 1 if found and found == previous else 1 if found else 0
            previous = found
            if stable >= 2:
                return found, screenshot, region
            time.sleep(0.25)
        raise WorkflowError('未识别到预期页面 ' + '/'.join(names) + '，已停止。')

    def click(self, action, observation):
        _, screenshot, region = observation
        if self.region_provider(screenshot) != 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'][action], region, screenshot.size)
        self.log('已执行：' + action)

    def pause(self, seconds):
        self.log('等待 %s 秒后执行一键雇佣。' % seconds)
        time.sleep(seconds)

    def run(self, dry_run=False):
        home = self.wait('home')
        if dry_run:
            self.log('首页识别通过。计划：领地 → 狂鼠之家 → 收矿 → 等待 10 秒 → 雇佣 → 返回首页。未点击。')
            return 'preview'

        self.click('territory', home)
        territory = self.wait('territory')
        self.click('rat_house', territory)
        rat = self.wait('collect', 'rat_house')
        if rat[0] == 'rat_house':
            self.log('未发现一键收矿，本次不执行雇佣。')
            self.click('rat_back', rat)
            self.click('territory_back', self.wait('territory'))
            self.wait('home')
            self.log('已确认返回首页。')
            return 'no_collection'
        self.click('collect', rat)
        reward = self.wait('reward')
        self.log('已确认收矿奖励弹框。')
        self.click('dismiss_reward', reward)
        self.pause(self.flow['wait_after_collect_seconds'])
        # This position is only used after a verified collection result was
        # dismissed, when the button changes from 一键收矿 to 一键雇佣.
        self.click('hire_open', self.wait('rat_house'))
        dialog = self.wait('white_compass', 'gold_compass', 'rainbow_detector', 'hire_dialog')
        if dialog[0] == 'hire_dialog':
            self.log('没有可用罗盘或探测仪，关闭雇佣弹框。')
            self.click('close_dialog', dialog)
        else:
            priority = {
                'white_compass': 'select_white',
                'gold_compass': 'select_gold',
                'rainbow_detector': 'select_rainbow',
            }
            self.click(priority[dialog[0]], dialog)
            self.click('hire_confirm', self.wait('hire_dialog'))
            self.wait('rat_house')
            self.log('已完成一键雇佣。')

        self.click('rat_back', self.wait('rat_house'))
        self.click('territory_back', self.wait('territory'))
        self.wait('home')
        self.log('收矿流程完成，已确认返回首页。')
        return 'completed'