import json
import os
import random
import shutil
import ssl
import webbrowser
from glob import glob
from tkinter import (
    ALL,
    BOTTOM,
    EW,
    LEFT,
    NS,
    RIGHT,
    TOP,
    Button,
    Canvas,
    Frame,
    Label,
    LabelFrame,
    PhotoImage,
    Scrollbar,
    Toplevel,
    X,
    filedialog,
    messagebox,
)
from urllib.parse import urlparse
from urllib.request import urlopen

from GuiUtils import BackgroundTaskProgress, ToolTips, set_icon
from Rom import Sprite
from Utils import is_bundled, local_path, open_file, output_path


class SpriteSelector(object):
    def __init__(self, parent, callback, adjuster=False):
        if is_bundled():
            self.deploy_icons()
        self.parent = parent
        self.window = Toplevel(parent)
        self.window.geometry("800x650")
        self.sections = []
        self.callback = callback
        self.adjuster = adjuster

        self.window.wm_title("TAKE ANY ONE YOU WANT")
        self.window['padx'] = 5
        self.window['pady'] = 5
        self.all_sprites = []

        def open_official_sprite_listing(_evt):
            webbrowser.open("http://alttpr.com/sprite_preview")

        def open_official_sprite_dir(_evt):
            if not os.path.isdir(self.official_sprite_dir):
                os.makedirs(self.official_sprite_dir)
            open_file(self.official_sprite_dir)

        def open_unofficial_sprite_dir(_evt):
            if not os.path.isdir(self.unofficial_sprite_dir):
                os.makedirs(self.unofficial_sprite_dir)
            open_file(self.unofficial_sprite_dir)

        # Open SpriteSomething directory for Link sprites
        def open_spritesomething_listing(_evt):
            webbrowser.open("https://miketrethewey.github.io/SpriteSomething-collections/snes/zelda3/link/")

        official_frametitle = Frame(self.window)
        official_title_text = Label(official_frametitle, text="Official Sprites")
        official_title_text.pack(side=LEFT)
        official_local_title_link = Label(official_frametitle, text="(open local)", fg="blue", cursor="hand2")
        official_local_title_link.pack(side=LEFT)
        official_local_title_link.bind("<Button-1>", open_official_sprite_dir)
        official_title_link = Label(official_frametitle, text="(ALttPR)", fg="blue", cursor="hand2")
        official_title_link.pack(side=LEFT)
        official_title_link.bind("<Button-1>", open_official_sprite_listing)

        unofficial_frametitle = Frame(self.window)
        unofficial_title_text = Label(unofficial_frametitle, text="Unofficial Sprites")
        unofficial_title_link = Label(unofficial_frametitle, text="(open local)", fg="blue", cursor="hand2")
        unofficial_title_text.pack(side=LEFT)
        unofficial_title_link.pack(side=LEFT)
        unofficial_title_link.bind("<Button-1>", open_unofficial_sprite_dir)
        # Include hyperlink to SpriteSomething directory for Link sprites
        spritesomething_title_link = Label(unofficial_frametitle, text="(SpriteSomething)", fg="blue", cursor="hand2")
        spritesomething_title_link.pack(side=LEFT)
        spritesomething_title_link.bind("<Button-1>", open_spritesomething_listing)

        self.icon_section(official_frametitle, os.path.join(self.official_sprite_dir,"*"), 'Official sprites not found. Click "Update official sprites" to download them.')
        self.icon_section(unofficial_frametitle, os.path.join(self.unofficial_sprite_dir,"*"), 'Put sprites in the unofficial sprites folder (see open link above) to have them appear here.')

        frame = Frame(self.window)
        frame.pack(side=BOTTOM, fill=X, pady=5)

        button = Button(frame, text="Browse for file...", command=self.browse_for_sprite)
        button.pack(side=RIGHT, padx=(5, 0))

        button = Button(frame, text="Update official sprites", command=self.update_official_sprites)
        button.pack(side=RIGHT, padx=(5, 0))

        button = Button(frame, text="Default Link sprite", command=self.use_default_link_sprite)
        button.pack(side=LEFT, padx=(0, 5))

        button = Button(frame, text="Random sprite", command=self.use_random_sprite)
        button.pack(side=LEFT, padx=(0, 5))

        if adjuster:
            button = Button(frame, text="Current sprite from rom", command=self.use_default_sprite)
            button.pack(side=LEFT, padx=(0, 5))

        set_icon(self.window)
        self.window.focus()

    def icon_section(self, frame_label, path, no_results_label):
        frame = LabelFrame(self.window, labelwidget=frame_label, padx=5, pady=5)
        canvas = Canvas(frame, borderwidth=0)
        y_scrollbar = Scrollbar(frame, orient="vertical", command=canvas.yview)
        y_scrollbar.pack(side="right", fill="y")
        content_frame = Frame(canvas)
        canvas.pack(side="left", fill="both", expand=True)
        canvas.create_window((4, 4), window=content_frame, anchor="nw")
        canvas.configure(yscrollcommand=y_scrollbar.set)

        def onFrameConfigure(canvas):
            """Reset the scroll region to encompass the inner frame"""
            canvas.configure(scrollregion=canvas.bbox("all"))

        content_frame.bind("<Configure>", lambda event, canvas=canvas: onFrameConfigure(canvas))
        frame.pack(side=TOP, fill=X)

        sprites = []

        for file in glob(path):
            sprites.append(Sprite(file))

        sprites.sort(key=lambda s: str.lower(s.name or "").strip())

        i = 0
        for sprite in sprites:
            image = get_image_for_sprite(sprite)
            if image is None:
                continue
            self.all_sprites.append(sprite)
            button = Button(content_frame, image=image, command=lambda spr=sprite: self.select_sprite(spr))
            ToolTips.register(button, sprite.name + ("\nBy: %s" % sprite.author_name if sprite.author_name else ""))
            button.image = image
            button.grid(row=i // 16, column=i % 16)
            i += 1

        if i == 0:
            label = Label(content_frame, text=no_results_label)
            label.pack()

    def update_official_sprites(self):
        # need to wrap in try catch. We don't want errors getting the json or downloading the files to break us.
        self.window.destroy()
        self.parent.update()
        def work(task):
            resultmessage = ""
            successful = True

            def finished():
                task.close_window()
                if successful:
                    messagebox.showinfo("Sprite Updater", resultmessage)
                else:
                    messagebox.showerror("Sprite Updater", resultmessage)
                SpriteSelector(self.parent, self.callback, self.adjuster)

            try:
                task.update_status("Downloading official sprites list")
                with urlopen('https://alttpr.com/sprites', context=ssl._create_unverified_context()) as response:
                    sprites_arr = json.loads(response.read().decode("utf-8"))
            except Exception as e:
                resultmessage = "Error getting list of official sprites. Sprites not updated.\n\n%s: %s" % (type(e).__name__, e)
                successful = False
                task.queue_event(finished)
                return

            try:
                task.update_status("Determining needed sprites")
                current_sprites = [os.path.basename(file) for file in glob(os.path.join(self.official_sprite_dir,"*"))]
                official_sprites = [(sprite['file'], os.path.basename(urlparse(sprite['file']).path)) for sprite in sprites_arr]
                needed_sprites = [(sprite_url, filename) for (sprite_url, filename) in official_sprites
                                  if filename not in current_sprites and filename != "001.link.1.zspr"]
                bundled_sprites = [os.path.basename(file) for file in glob(os.path.join(self.unofficial_sprite_dir,"*"))]
                # todo: eventually use the above list to avoid downloading any sprites that we already have cached in the bundle.

                official_filenames = [filename for (_, filename) in official_sprites]
                obsolete_sprites = [sprite for sprite in current_sprites if sprite not in official_filenames]
            except Exception as e:
                resultmessage = "Error Determining which sprites to update. Sprites not updated.\n\n%s: %s" % (type(e).__name__, e)
                successful = False
                task.queue_event(finished)
                return

            updated = 0
            for (sprite_url, filename) in needed_sprites:
                try:
                    task.update_status("Downloading needed sprite %g/%g" % (updated + 1, len(needed_sprites)))
                    target = os.path.join(self.official_sprite_dir, filename)
                    with urlopen(sprite_url) as response, open(target, 'wb') as out:
                        shutil.copyfileobj(response, out)
                except Exception as e:
                    resultmessage = "Error downloading sprite. Not all sprites updated.\n\n%s: %s" % (type(e).__name__, e)
                    successful = False
                updated += 1

            deleted = 0
            for sprite in obsolete_sprites:
                try:
                    task.update_status("Removing obsolete sprite %g/%g" % (deleted + 1, len(obsolete_sprites)))
                    os.remove(os.path.join(self.official_sprite_dir, sprite))
                except Exception as e:
                    resultmessage = "Error removing obsolete sprite. Not all sprites updated.\n\n%s: %s" % (type(e).__name__, e)
                    successful = False
                deleted += 1

            if successful:
                resultmessage = "official sprites updated successfully"

            task.queue_event(finished)

        BackgroundTaskProgress(self.parent, work, "Updating Sprites")

    def browse_for_sprite(self):
        sprite = filedialog.askopenfilename(
            filetypes=[("All Sprite Sources", (".zspr", ".spr", ".sfc", ".smc")),
                       ("ZSprite files", ".zspr"),
                       ("Sprite files", ".spr"),
                       ("Rom Files", (".sfc", ".smc")),
                       ("All Files", "*")])
        try:
            self.callback(Sprite(sprite))
        except Exception:
            self.callback(None)
        self.window.destroy()

    def use_default_sprite(self):
        self.callback(None, False)
        self.window.destroy()

    def use_default_link_sprite(self):
        self.callback(Sprite.default_link_sprite(), False)
        self.window.destroy()

    def use_random_sprite(self):
        self.callback(random.choice(self.all_sprites) if self.all_sprites else None, True)
        self.window.destroy()

    def select_sprite(self, spritename):
        self.callback(spritename, False)
        self.window.destroy()

    def deploy_icons(self):
        if not os.path.exists(self.unofficial_sprite_dir):
            os.makedirs(self.unofficial_sprite_dir)
        if not os.path.exists(self.official_sprite_dir):
            shutil.copytree(self.local_official_sprite_dir, self.official_sprite_dir)

    @property
    def official_sprite_dir(self):
        return self.local_official_sprite_dir

    @property
    def local_official_sprite_dir(self):
        return local_path(os.path.join("data","sprites","official"))

    @property
    def unofficial_sprite_dir(self):
        return self.local_unofficial_sprite_dir

    @property
    def local_unofficial_sprite_dir(self):
        return local_path(os.path.join("data","sprites","unofficial"))


def get_image_for_sprite(sprite):
    if not sprite.valid:
        return None
    height = 24
    width = 16

    def draw_sprite_into_gif(add_palette_color, set_pixel_color_index):

        def drawsprite(spr, pal_as_colors, offset):
            for y, row in enumerate(spr):
                for x, pal_index in enumerate(row):
                    if pal_index:
                        color = pal_as_colors[pal_index - 1]
                        set_pixel_color_index(x + offset[0], y + offset[1], color)

        add_palette_color(16, (40, 40, 40))
        shadow = [
            [0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0],
            [0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0],
            [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
            [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
            [0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0],
            [0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0],
        ]

        drawsprite(shadow, [16], (2, 17))

        palettes = sprite.decode_palette()
        for i in range(15):
            add_palette_color(i + 1, palettes[0][i])

        body = sprite.decode16(0x4C0)
        drawsprite(body, list(range(1, 16)), (0, 8))
        head = sprite.decode16(0x40)
        drawsprite(head, list(range(1, 16)), (0, 0))

    def make_gif(callback):
        gif_header = b'GIF89a'

        gif_lsd = bytearray(7)
        gif_lsd[0] = width
        gif_lsd[2] = height
        gif_lsd[4] = 0xF4  # 32 color palette follows.  transparant + 15 for sprite + 1 for shadow=17 which rounds up to 32 as nearest power of 2
        gif_lsd[5] = 0  # background color is zero
        gif_lsd[6] = 0  # aspect raio not specified
        gif_gct = bytearray(3 * 32)

        gif_gce = bytearray(8)
        gif_gce[0] = 0x21  # start of extention blocked
        gif_gce[1] = 0xF9  # identifies this as the Graphics Control extension
        gif_gce[2] = 4  # we are suppling only the 4 four bytes
        gif_gce[3] = 0x01  # this gif includes transparency
        gif_gce[4] = gif_gce[5] = 0  # animation frrame delay (unused)
        gif_gce[6] = 0  # transparent color is index 0
        gif_gce[7] = 0  # end of gif_gce
        gif_id = bytearray(10)
        gif_id[0] = 0x2c
        # byte 1,2 are image left. 3,4 are image top both are left as zerosuitsamus
        gif_id[5] = width
        gif_id[7] = height
        gif_id[9] = 0  # no local color table

        gif_img_minimum_code_size = bytes([7])  # we choose 7 bits, so that each pixel is represented by a byte, for conviennce.

        clear = 0x80
        stop = 0x81

        unchunked_image_data = bytearray(height * (width + 1) + 1)
        # we technically need a Clear code once every 125 bytes, but we do it at the start of every row for simplicity
        for row in range(height):
            unchunked_image_data[row * (width + 1)] = clear
        unchunked_image_data[-1] = stop

        def add_palette_color(index, color):
            gif_gct[3 * index] = color[0]
            gif_gct[3 * index + 1] = color[1]
            gif_gct[3 * index + 2] = color[2]

        def set_pixel_color_index(x, y, color):
            unchunked_image_data[y * (width + 1) + x + 1] = color

        callback(add_palette_color, set_pixel_color_index)

        def chunk_image(img):
            for i in range(0, len(img), 255):
                chunk = img[i:i + 255]
                yield bytes([len(chunk)])
                yield chunk

        gif_img = b''.join([gif_img_minimum_code_size] + list(chunk_image(unchunked_image_data)) + [b'\x00'])

        gif = b''.join([gif_header, gif_lsd, gif_gct, gif_gce, gif_id, gif_img, b'\x3b'])

        return gif

    gif_data = make_gif(draw_sprite_into_gif)
    image = PhotoImage(data=gif_data)

    return image.zoom(2)