#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Display functionality for Storm Games.

Provides functionality for:
- GUI initialization
- Text display with navigation
- Message boxes
"""

import pygame
import time
import os
import pyperclip
import random
from xdg import BaseDirectory
from setproctitle import setproctitle
from .speech import Speech
from .services import PathService, VolumeService

# Keep track of the instructions for navigating display_text has been shown
displayTextUsageInstructions = False

def initialize_gui(gameTitle):
    """Initialize the game GUI and sound system.
    
    Args:
        gameTitle (str): Title of the game
        
    Returns:
        dict: Dictionary of loaded sound objects
    """
    # Initialize path service with game title
    pathService = PathService.get_instance().initialize(gameTitle)
    
    # Seed the random generator to the clock
    random.seed()
    
    # Set game's name
    setproctitle(str.lower(str.replace(gameTitle, " ", "-")))
    
    # Initialize pygame
    pygame.init()
    pygame.display.set_mode((800, 600))
    pygame.display.set_caption(gameTitle)
    
    # Set up audio system
    pygame.mixer.pre_init(44100, -16, 2, 1024)
    pygame.mixer.init()
    pygame.mixer.set_num_channels(32)
    pygame.mixer.set_reserved(0)  # Reserve channel for cut scenes
    
    # Enable key repeat for volume controls
    pygame.key.set_repeat(500, 100)
    
    # Load sound files
    try:
        from os import listdir
        from os.path import isfile, join
        soundFiles = [f for f in listdir("sounds/") 
                      if isfile(join("sounds/", f)) 
                      and (f.split('.')[1].lower() in ["ogg", "wav"])]
    except Exception as e:
        print("No sounds found.")
        Speech.get_instance().speak("No sounds found.", False)
        soundFiles = []
    
    # Create dictionary of sound objects
    soundData = {}
    for f in soundFiles:
        soundData[f.split('.')[0]] = pygame.mixer.Sound("sounds/" + f)
    
    # Play intro sound if available
    from .sound import cut_scene
    if 'game-intro' in soundData:
        cut_scene(soundData, 'game-intro')
    
    return soundData

def display_text(text):
    """Display and speak text with navigation controls.
    
    Allows users to:
    - Navigate text line by line with arrow keys (skipping blank lines)
    - Listen to full text with space
    - Copy current line or full text (preserving blank lines)
    - Exit with enter/escape
    - Volume controls (with Alt modifier):
        - Alt+PageUp/PageDown: Master volume up/down
        - Alt+Home/End: Background music volume up/down
        - Alt+Insert/Delete: Sound effects volume up/down
    
    Args:
        text (list): List of text lines to display
    """
    # Get service instances
    speech = Speech.get_instance()
    volumeService = VolumeService.get_instance()
    
    # Store original text with blank lines for copying
    originalText = text.copy()
    
    # Create navigation text by filtering out blank lines
    navText = [line for line in text if line.strip()]
    
    # Add instructions at the start on the first display
    global displayTextUsageInstructions
    if not displayTextUsageInstructions:
        instructions = ("Press space to read the whole text. Use up and down arrows to navigate "
                    "the text line by line. Press c to copy the current line to the clipboard "
                    "or t to copy the entire text. Press enter or escape when you are done reading.")
        navText.insert(0, instructions)
        displayTextUsageInstructions = True
    
    # Add end marker
    navText.append("End of text.")
    
    currentIndex = 0
    speech.speak(navText[currentIndex])
    
    while True:
        event = pygame.event.wait()
        if event.type == pygame.KEYDOWN:
            # Check for Alt modifier
            mods = pygame.key.get_mods()
            altPressed = mods & pygame.KMOD_ALT
            
            # Volume controls (require Alt)
            if altPressed:
                if event.key == pygame.K_PAGEUP:
                    volumeService.adjust_master_volume(0.1, pygame.mixer)
                elif event.key == pygame.K_PAGEDOWN:
                    volumeService.adjust_master_volume(-0.1, pygame.mixer)
                elif event.key == pygame.K_HOME:
                    volumeService.adjust_bgm_volume(0.1, pygame.mixer)
                elif event.key == pygame.K_END:
                    volumeService.adjust_bgm_volume(-0.1, pygame.mixer)
                elif event.key == pygame.K_INSERT:
                    volumeService.adjust_sfx_volume(0.1, pygame.mixer)
                elif event.key == pygame.K_DELETE:
                    volumeService.adjust_sfx_volume(-0.1, pygame.mixer)
            else:
                if event.key in (pygame.K_ESCAPE, pygame.K_RETURN):
                    return
                    
                if event.key in [pygame.K_DOWN, pygame.K_s] and currentIndex < len(navText) - 1:
                    currentIndex += 1
                    speech.speak(navText[currentIndex])
                    
                if event.key in [pygame.K_UP, pygame.K_w] and currentIndex > 0:
                    currentIndex -= 1
                    speech.speak(navText[currentIndex])
                    
                if event.key == pygame.K_SPACE:
                    # Join with newlines to preserve spacing in speech
                    speech.speak('\n'.join(originalText[1:-1]))
                    
                if event.key == pygame.K_c:
                    try:
                        pyperclip.copy(navText[currentIndex])
                        speech.speak("Copied " + navText[currentIndex] + " to the clipboard.")
                    except:
                        speech.speak("Failed to copy the text to the clipboard.")
                        
                if event.key == pygame.K_t:
                    try:
                        # Join with newlines to preserve blank lines in full text
                        pyperclip.copy(''.join(originalText[2:-1]))
                        speech.speak("Copied entire message to the clipboard.")
                    except:
                        speech.speak("Failed to copy the text to the clipboard.")
                    
        event = pygame.event.clear()
        time.sleep(0.001)