"""
人类行为模拟工具
模拟真实用户的行为模式，包括打字、点击、滚动等。
"""

import random
import asyncio
from typing import Optional, Tuple, List
from playwright.async_api import Page, Locator, ElementHandle

from ..config.settings import settings
from .logger import get_logger

logger = get_logger(__name__)


class HumanBehaviorSimulator:
    """人类行为模拟器"""

    def __init__(self, config=None):
        """
        初始化人类行为模拟器

        Args:
            config: 人类行为配置，如果为None则使用默认配置
        """
        self.config = config or settings.human_behavior
        self.typing_speed = self.config.typing_speed  # (min, max) ms/字符
        self.pause_probability = self.config.pause_probability
        self.random_delay_range = self.config.random_delay_range  # (min, max) 秒
        self.click_delay_range = self.config.click_delay_range
        self.scroll_delay_range = self.config.scroll_delay_range

    async def human_type(
        self,
        page: Page,
        selector: str,
        text: str,
        clear_first: bool = True,
        delay: Optional[Tuple[float, float]] = None
    ):
        """
        模拟人类输入文字

        Args:
            page: Playwright页面对象
            selector: 元素选择器
            text: 要输入的文本
            clear_first: 是否先清空输入框
            delay: 自定义打字延迟范围
        """
        try:
            element = await page.wait_for_selector(selector, timeout=10000)
            if not element:
                logger.warning(f"未找到输入元素: {selector}")
                return False

            # 确保元素可见和可编辑
            await element.scroll_into_view_if_needed()
            await element.wait_for_element_state("visible")

            # 聚焦元素
            await element.click()

            # 清空输入框
            if clear_first:
                await element.fill("")

            # 分批输入文字，模拟真实打字
            words = text.split()
            for i, word in enumerate(words):
                # 输入单词
                for char in word:
                    char_delay = delay or self.typing_speed
                    delay_ms = random.randint(*char_delay)
                    await element.type(char, delay=delay_ms)

                    # 随机暂停
                    if random.random() < self.pause_probability:
                        pause_time = random.uniform(*self.random_delay_range)
                        await asyncio.sleep(pause_time)

                # 如果不是最后一个单词，添加空格
                if i < len(words) - 1:
                    await element.type(" ", delay=random.randint(*self.typing_speed))

            logger.debug(f"人类化输入完成: {selector} -> {text[:20]}...")
            return True

        except Exception as e:
            logger.error(f"人类化输入失败: {selector} - {e}")
            return False

    async def human_click(
        self,
        page: Page,
        selector: str,
        position: Optional[Tuple[float, float]] = None,
        modifiers: Optional[List[str]] = None,
        delay: Optional[float] = None
    ):
        """
        模拟人类点击

        Args:
            page: Playwright页面对象
            selector: 元素选择器
            position: 点击位置 (x, y)
            modifiers: 修饰键列表 ['Ctrl', 'Shift', 'Alt', 'Meta']
            delay: 点击前延迟时间
        """
        try:
            element = await page.wait_for_selector(selector, timeout=10000)
            if not element:
                logger.warning(f"未找到点击元素: {selector}")
                return False

            # 等待元素可见和可点击
            await element.scroll_into_view_if_needed()
            await element.wait_for_element_state("visible")

            # 添加随机延迟
            click_delay = delay or random.uniform(*self.click_delay_range)
            await asyncio.sleep(click_delay)

            # 模拟鼠标移动到元素位置
            bbox = await element.bounding_box()
            if bbox:
                # 在元素内部随机选择点击位置
                if not position:
                    x = bbox['x'] + bbox['width'] * random.uniform(0.2, 0.8)
                    y = bbox['y'] + bbox['height'] * random.uniform(0.2, 0.8)
                    position = (x, y)

                # 移动鼠标到点击位置
                await page.mouse.move(position[0], position[1])

                # 小幅随机移动，模拟真实手部抖动
                offset_x = random.uniform(-2, 2)
                offset_y = random.uniform(-2, 2)
                await page.mouse.move(position[0] + offset_x, position[1] + offset_y)

                # 点击
                await page.mouse.click(position[0] + offset_x, position[1] + offset_y, modifiers=modifiers or [])
            else:
                # 如果无法获取边界框，直接点击元素
                await element.click(modifiers=modifiers or [])

            logger.debug(f"人类化点击完成: {selector}")
            return True

        except Exception as e:
            logger.error(f"人类化点击失败: {selector} - {e}")
            return False

    async def human_scroll(
        self,
        page: Page,
        distance: int = 300,
        direction: str = "down",
        steps: int = 3
    ):
        """
        模拟人类滚动

        Args:
            page: Playwright页面对象
            distance: 滚动距离
            direction: 滚动方向 ('up', 'down', 'left', 'right')
            steps: 滚动步数
        """
        try:
            if direction not in ['up', 'down', 'left', 'right']:
                direction = 'down'

            # 计算每步滚动距离
            step_distance = distance / steps

            for i in range(steps):
                if direction == 'down':
                    await page.mouse.wheel(0, step_distance)
                elif direction == 'up':
                    await page.mouse.wheel(0, -step_distance)
                elif direction == 'right':
                    await page.mouse.wheel(step_distance, 0)
                elif direction == 'left':
                    await page.mouse.wheel(-step_distance, 0)

                # 每步之间添加随机延迟
                scroll_delay = random.uniform(*self.scroll_delay_range)
                await asyncio.sleep(scroll_delay)

            logger.debug(f"人类化滚动完成: {direction} {distance}px")
            return True

        except Exception as e:
            logger.error(f"人类化滚动失败: {e}")
            return False

    async def human_select_option(
        self,
        page: Page,
        selector: str,
        value: str,
        delay: Optional[float] = None
    ):
        """
        模拟人类选择下拉选项

        Args:
            page: Playwright页面对象
            selector: 下拉框选择器
            value: 选项值
            delay: 操作前延迟
        """
        try:
            element = await page.wait_for_selector(selector, timeout=10000)
            if not element:
                logger.warning(f"未找到下拉框: {selector}")
                return False

            # 滚动到元素
            await element.scroll_into_view_if_needed()

            # 添加随机延迟
            if delay:
                await asyncio.sleep(delay)
            else:
                await asyncio.sleep(random.uniform(*self.random_delay_range))

            # 点击下拉框
            await element.click()

            # 等待选项出现并选择
            option_selector = f"{selector} option[value='{value}']"
            await page.wait_for_selector(option_selector, timeout=5000)
            await page.select_option(selector, value)

            logger.debug(f"人类化选择完成: {selector} -> {value}")
            return True

        except Exception as e:
            logger.error(f"人类化选择失败: {selector} - {e}")
            return False

    async def human_drag_and_drop(
        self,
        page: Page,
        source_selector: str,
        target_selector: str,
        delay: Optional[float] = None
    ):
        """
        模拟人类拖拽操作

        Args:
            page: Playwright页面对象
            source_selector: 源元素选择器
            target_selector: 目标元素选择器
            delay: 操作前延迟
        """
        try:
            source_element = await page.wait_for_selector(source_selector, timeout=10000)
            target_element = await page.wait_for_selector(target_selector, timeout=10000)

            if not source_element or not target_element:
                logger.warning(f"未找到拖拽元素: {source_selector} -> {target_selector}")
                return False

            # 获取元素位置
            source_bbox = await source_element.bounding_box()
            target_bbox = await target_element.bounding_box()

            if not source_bbox or not target_bbox:
                logger.error("无法获取元素位置信息")
                return False

            # 添加随机延迟
            if delay:
                await asyncio.sleep(delay)
            else:
                await asyncio.sleep(random.uniform(*self.random_delay_range))

            # 开始拖拽
            source_x = source_bbox['x'] + source_bbox['width'] / 2
            source_y = source_bbox['y'] + source_bbox['height'] / 2
            target_x = target_bbox['x'] + target_bbox['width'] / 2
            target_y = target_bbox['y'] + target_bbox['height'] / 2

            await page.mouse.move(source_x, source_y)
            await page.mouse.down()

            # 模拟拖拽路径（不是直线）
            steps = 10
            for i in range(1, steps + 1):
                progress = i / steps
                # 添加一些曲线变化
                curve = math.sin(progress * math.pi) * 20
                x = source_x + (target_x - source_x) * progress + random.uniform(-curve, curve)
                y = source_y + (target_y - source_y) * progress + random.uniform(-curve, curve)
                await page.mouse.move(x, y)
                await asyncio.sleep(0.05)

            await page.mouse.up()

            logger.debug(f"人类化拖拽完成: {source_selector} -> {target_selector}")
            return True

        except Exception as e:
            logger.error(f"人类化拖拽失败: {e}")
            return False

    async def random_wait(self, min_seconds: float = 1.0, max_seconds: float = 3.0):
        """
        随机等待

        Args:
            min_seconds: 最小等待时间
            max_seconds: 最大等待时间
        """
        wait_time = random.uniform(min_seconds, max_seconds)
        await asyncio.sleep(wait_time)
        logger.debug(f"随机等待: {wait_time:.2f}秒")

    async def simulate_reading(self, page: Page, reading_time: float = 5.0):
        """
        模拟阅读行为

        Args:
            page: Playwright页面对象
            reading_time: 阅读时间（秒）
        """
        try:
            # 在阅读期间进行轻微的滚动和鼠标移动
            start_time = asyncio.get_event_loop().time()

            while asyncio.get_event_loop().time() - start_time < reading_time:
                # 轻微滚动
                scroll_distance = random.randint(-50, 50)
                await page.mouse.wheel(0, scroll_distance)

                # 鼠标小幅移动
                viewport = page.viewport_size
                if viewport:
                    x = random.randint(100, viewport['width'] - 100)
                    y = random.randint(100, viewport['height'] - 100)
                    await page.mouse.move(x, y)

                # 等待随机时间
                await asyncio.sleep(random.uniform(0.5, 1.5))

            logger.debug(f"模拟阅读完成: {reading_time}秒")
            return True

        except Exception as e:
            logger.error(f"模拟阅读失败: {e}")
            return False

    async def random_mouse_movement(self, page: Page, duration: float = 2.0):
        """
        随机鼠标移动

        Args:
            page: Playwright页面对象
            duration: 移动持续时间（秒）
        """
        try:
            viewport = page.viewport_size
            if not viewport:
                return False

            start_time = asyncio.get_event_loop().time()
            current_x = viewport['width'] / 2
            current_y = viewport['height'] / 2

            while asyncio.get_event_loop().time() - start_time < duration:
                # 生成随机目标位置
                target_x = random.randint(50, viewport['width'] - 50)
                target_y = random.randint(50, viewport['height'] - 50)

                # 平滑移动到目标位置
                steps = 20
                for i in range(steps + 1):
                    progress = i / steps
                    x = current_x + (target_x - current_x) * progress
                    y = current_y + (target_y - current_y) * progress
                    await page.mouse.move(x, y)
                    await asyncio.sleep(0.03)

                current_x, current_y = target_x, target_y
                await asyncio.sleep(random.uniform(0.1, 0.3))

            logger.debug(f"随机鼠标移动完成: {duration}秒")
            return True

        except Exception as e:
            logger.error(f"随机鼠标移动失败: {e}")
            return False


# 创建全局实例
human_behavior = HumanBehaviorSimulator()

# 导入math模块用于拖拽中的曲线计算
import math