import cv2
import numpy as np
from scipy import signal
from module.base.timer import Timer
from module.base.utils import area_size, crop, rgb2luma, load_image
from module.logger import logger
from module.ui.scroll import Scroll
from tasks.base.ui import UI
from tasks.combat.assets.assets_combat_support import COMBAT_SUPPORT_ADD, COMBAT_SUPPORT_LIST, \
    COMBAT_SUPPORT_LIST_SCROLL, COMBAT_SUPPORT_SELECTED
from tasks.combat.assets.assets_combat_team import COMBAT_TEAM_SUPPORT, COMBAT_TEAM_DISMISSSUPPORT


class SupportCharacter:
    _image_cache = {}

    def __init__(self, name, screenshot, similarity=0.85):
        self.name = name
        self.image = self._scale_character()
        self.screenshot = screenshot
        self.similarity = similarity
        self.button = self._find_character()

    def __bool__(self):
        # __bool__ is called when use an object of the class in a boolean context
        return self.button is not None

    def _scale_character(self):
        """
        Returns:
            Image: Character image after scaled
        """

        if self.name in SupportCharacter._image_cache:
            logger.info(f"Using cached image of {self.name}")
            return SupportCharacter._image_cache[self.name]

        img = load_image(f"assets/character/{self.name}.png")
        scaled_img = cv2.resize(img, (85, 82))
        SupportCharacter._image_cache[self.name] = scaled_img
        logger.info(f"Character {self.name} image cached")
        return scaled_img

    def _find_character(self):
        character = np.array(self.image)
        support_list_img = self.screenshot
        res = cv2.matchTemplate(character, support_list_img, cv2.TM_CCOEFF_NORMED)

        _, max_val, _, max_loc = cv2.minMaxLoc(res)

        character_width = character.shape[1]
        character_height = character.shape[0]

        return (max_loc[0], max_loc[1], max_loc[0] + character_width, max_loc[1] + character_height) \
            if max_val >= self.similarity else None

    def selected_icon_search(self):
        """
        Returns:
            tuple: (x1, y1, x2, y2) of selected icon search area
        """
        return (
            self.button[0], self.button[1] - 5, self.button[0] + 30, self.button[1]) if self.button else None


class SupportListScroll(Scroll):
    def cal_position(self, main):
        """
        Args:
            main (ModuleBase):

        Returns:
            float: 0 to 1.
        """
        image = main.device.image

        temp_area = list(self.area)
        temp_area[0] = int(temp_area[0] * 0.98)
        temp_area[2] = int(temp_area[2] * 1.02)

        line = rgb2luma(crop(image, temp_area)).flatten()
        width = area_size(temp_area)[0]
        parameters = {
            "height": 180,
            "prominence": 30,
            "distance": width * 0.75,
        }
        peaks, _ = signal.find_peaks(line, **parameters)
        peaks //= width
        self.length = len(peaks)
        middle = np.mean(peaks)

        position = (middle - self.length / 2) / (self.total - self.length)
        position = position if position > 0 else 0.0
        position = position if position < 1 else 1.0
        logger.attr(
            self.name, f"{position:.2f} ({middle}-{self.length / 2})/({self.total}-{self.length})")
        return position


class CombatSupport(UI):
    def support_set(self, support_character_name: str = "FirstCharacter"):
        """
        Args:
            support_character_name: Support character name

        Returns:
            bool: If clicked

        Pages:
            in: COMBAT_PREPARE
            mid: COMBAT_SUPPORT_LIST
            out: COMBAT_PREPARE
        """
        logger.hr("Combat support")
        skip_first_screenshot = True
        while 1:
            if skip_first_screenshot:
                skip_first_screenshot = False
            else:
                self.device.screenshot()

            # End
            if self.appear(COMBAT_TEAM_DISMISSSUPPORT):
                return True

            # Click
            if self.appear(COMBAT_TEAM_SUPPORT, interval=2):
                self.device.click(COMBAT_TEAM_SUPPORT)
                self.interval_reset(COMBAT_TEAM_SUPPORT)
                continue
            if self.appear(COMBAT_SUPPORT_LIST, interval=2):
                if support_character_name != "FirstCharacter":
                    self._search_support(
                        support_character_name)  # Search support
                self.device.click(COMBAT_SUPPORT_ADD)
                self.interval_reset(COMBAT_SUPPORT_LIST)
                continue

    def _search_support(self, support_character_name: str = "JingYuan"):
        """
        Args:
            support_character_name: Support character name

        Returns:
            bool: True if found support else False

        Pages:
            in: COMBAT_SUPPORT_LIST
            out: COMBAT_SUPPORT_LIST
        """
        logger.hr("Combat support search")
        scroll = SupportListScroll(area=COMBAT_SUPPORT_LIST_SCROLL.area, color=(194, 196, 205),
                                   name=COMBAT_SUPPORT_LIST_SCROLL.name)
        if scroll.appear(main=self):
            if not scroll.at_bottom(main=self):
                scroll.set_bottom(main=self)
                scroll.set_top(main=self)

            logger.info("Searching support")
            skip_first_screenshot = False
            character = None
            while 1:
                if skip_first_screenshot:
                    skip_first_screenshot = False
                else:
                    self.device.screenshot()

                if not support_character_name.startswith("Trailblazer"):
                    character = SupportCharacter(support_character_name, self.device.image)
                else:
                    character = SupportCharacter(f"Stelle{support_character_name[11:]}",
                                                 self.device.image) or SupportCharacter(
                        f"Caelum{support_character_name[11:]}", self.device.image)

                if character:
                    logger.info("Support found")
                    if self._select_support(character):
                        return True
                    else:
                        logger.warning("Support not selected")
                        return False

                if not scroll.at_bottom(main=self):
                    scroll.next_page(main=self)
                    continue
                else:
                    logger.info("Support not found")
                    return False

    def _select_support(self, character: SupportCharacter):
        """
        Args:
            character: Support character

        Pages:
            in: COMBAT_SUPPORT_LIST
            out: COMBAT_SUPPORT_LIST
        """
        logger.hr("Combat support select")
        COMBAT_SUPPORT_SELECTED.matched_button.search = character.selected_icon_search()
        skip_first_screenshot = False
        interval = Timer(2)
        while 1:
            if skip_first_screenshot:
                skip_first_screenshot = False
            else:
                self.device.screenshot()

            # End
            if self.match_template(COMBAT_SUPPORT_SELECTED):
                return True

            if interval.reached():
                self.device.click(character)
                interval.reset()
                continue