import os
import shutil
import json
import asyncio
from pathlib import Path
from nicegui import ui
import tmdbsimple as tmdb
from guessit import guessit

# ==============================================================================
# 1. CONFIGURAÇÕES E CONSTANTES
# ==============================================================================
ROOT_DIR = "/downloads"
CONFIG_FILE = 'config.json'

# Extensões para proteger pastas de exclusão
VIDEO_EXTENSIONS = {'.mkv', '.mp4', '.avi', '.mov', '.iso', '.wmv', '.flv', '.webm', '.m4v'}
# Extensões de legenda para mover junto
SUBTITLE_EXTENSIONS = {'.srt', '.sub', '.ass', '.vtt', '.idx'}

# ==============================================================================
# 2. PERSISTÊNCIA (Salvar API Key)
# ==============================================================================
def load_config():
    if os.path.exists(CONFIG_FILE):
        try:
            with open(CONFIG_FILE, 'r') as f:
                return json.load(f)
        except: pass
    return {}

def save_config(api_key):
    with open(CONFIG_FILE, 'w') as f:
        json.dump({'tmdb_api_key': api_key}, f)

# ==============================================================================
# 3. LÓGICA DE ORGANIZAÇÃO (CORE)
# ==============================================================================
class MediaOrganizer:
    def __init__(self):
        config = load_config()
        self.api_key = config.get('tmdb_api_key', '')
        self.path = ROOT_DIR
        
        # Estado
        self.preview_data = []      # Lista de arquivos para processar
        self.folders_to_clean = set()
        
        # Configura TMDb
        if self.api_key:
            tmdb.API_KEY = self.api_key

    def set_api_key(self, key):
        self.api_key = key.strip()
        tmdb.API_KEY = self.api_key
        save_config(self.api_key)
        ui.notify('API Key salva com sucesso!', type='positive')

    async def search_tmdb(self, title, year, media_type):
        """Consulta o TMDb e retorna candidatos."""
        if not self.api_key: return []
        
        search = tmdb.Search()
        try:
            # Roda em thread separada para não travar a UI
            loop = asyncio.get_event_loop()
            if media_type == 'movie':
                # Busca Filmes
                res = await loop.run_in_executor(None, lambda: search.movie(query=title, year=year, language='pt-BR'))
            else:
                # Busca Séries
                res = await loop.run_in_executor(None, lambda: search.tv(query=title, first_air_date_year=year, language='pt-BR'))
            
            return res.get('results', [])
        except Exception as e:
            print(f"Erro TMDb: {e}")
            return []

    async def analyze_folder(self):
        """Analisa a pasta usando Guessit + TMDb."""
        self.preview_data = []
        self.folders_to_clean = set()
        
        if not self.api_key:
            ui.notify('Por favor, configure a API Key do TMDb primeiro.', type='negative')
            return

        # Notificação de progresso
        loading = ui.notification(message='Analisando arquivos (Guessit + TMDb)...', spinner=True, timeout=None)

        try:
            # Cria pastas base se não existirem
            os.makedirs(os.path.join(ROOT_DIR, "Filmes"), exist_ok=True)
            os.makedirs(os.path.join(ROOT_DIR, "Séries"), exist_ok=True)

            for root, dirs, files in os.walk(self.path):
                # Ignora pastas de destino para evitar loop
                if "Filmes" in root or "Séries" in root: continue

                files_in_dir = set(files)

                for file in files:
                    file_ext = os.path.splitext(file)[1].lower()
                    if file_ext not in VIDEO_EXTENSIONS: continue

                    # 1. Análise Local (Guessit)
                    guess = guessit(file)
                    title = guess.get('title')
                    year = guess.get('year')
                    media_type = guess.get('type') # 'movie' ou 'episode'
                    
                    if not title: continue # Se não achou nem título, ignora

                    # 2. Consulta TMDb
                    candidates = await self.search_tmdb(title, year, media_type)
                    
                    # 3. Lógica de Decisão (Match ou Ambiguidade)
                    match_data = None
                    status = 'AMBIGUO' # Padrão: incerto
                    
                    if candidates:
                        # Tenta match exato (Primeiro resultado geralmente é o melhor no TMDb)
                        first = candidates[0]
                        tmdb_title = first.get('title') if media_type == 'movie' else first.get('name')
                        tmdb_date = first.get('release_date') if media_type == 'movie' else first.get('first_air_date')
                        tmdb_year = int(tmdb_date[:4]) if tmdb_date else None
                        
                        # Se ano bate ou não tem ano no arquivo original, confia no primeiro resultado
                        if year and tmdb_year == year:
                            match_data = first
                            status = 'OK'
                        elif not year:
                             # Sem ano no arquivo, mas achou resultado. Marca como Ambíguo mas sugere o primeiro
                             match_data = first
                             status = 'CHECK' # Requer atenção visual
                        else:
                             # Ano diferente. Pode ser remake ou erro.
                             match_data = first
                             status = 'CHECK'
                    else:
                        status = 'NAO_ENCONTRADO'

                    # Cria objeto de item
                    item = {
                        'id': len(self.preview_data),
                        'original_file': file,
                        'original_root': root,
                        'guess_title': title,
                        'guess_year': year,
                        'type': media_type,
                        'candidates': candidates, # Lista para o modal de escolha
                        'selected_match': match_data,
                        'status': status,
                        'target_path': None, # Será calculado
                        'subtitles': [] # Lista de legendas associadas
                    }

                    # Calcula caminho se tiver match
                    if match_data:
                        self.calculate_path(item)
                    
                    # Procura Legendas Associadas
                    video_stem = Path(file).stem
                    for f in files_in_dir:
                        if f == file: continue
                        if os.path.splitext(f)[1].lower() in SUBTITLE_EXTENSIONS:
                            if f.startswith(video_stem):
                                suffix = f[len(video_stem):] # Ex: .forced.srt
                                item['subtitles'].append({
                                    'original': f,
                                    'suffix': suffix,
                                    'src': os.path.join(root, f)
                                })

                    self.preview_data.append(item)
                    self.folders_to_clean.add(root)

        except Exception as e:
            ui.notify(f'Erro fatal: {e}', type='negative')
            print(e)
        
        loading.dismiss()
        
        # Se achou itens, muda visualização
        if self.preview_data:
            return True
        else:
            ui.notify('Nenhum vídeo encontrado nesta pasta.', type='warning')
            return False

    def calculate_path(self, item):
        """Gera o caminho final baseado no match selecionado."""
        match = item['selected_match']
        if not match: 
            item['target_path'] = None
            return

        ext = os.path.splitext(item['original_file'])[1]
        
        if item['type'] == 'movie':
            # Estrutura: /downloads/Filmes/Nome (Ano).ext
            title = match.get('title', item['guess_title']).replace('/', '-').replace(':', '-')
            date = match.get('release_date', '')
            year = date[:4] if date else '0000'
            
            new_name = f"{title} ({year}){ext}"
            item['target_path'] = os.path.join(ROOT_DIR, "Filmes", new_name)
            
        else:
            # Estrutura: /downloads/Séries/Nome/Temporada XX/Episódio YY.ext
            name = match.get('name', item['guess_title']).replace('/', '-').replace(':', '-')
            
            # Tenta pegar temporada/episódio do guessit
            # Se falhar, usa S00E00 como fallback seguro para não perder arquivo
            guess = guessit(item['original_file'])
            s = guess.get('season')
            e = guess.get('episode')
            
            if not s or not e:
                # Caso extremo: não achou temporada/ep no nome do arquivo
                item['status'] = 'ERRO_S_E' # Erro de Season/Episode
                item['target_path'] = None
                return

            # Suporte a múltiplas temporadas/episodios (lista)
            if isinstance(s, list): s = s[0]
            if isinstance(e, list): e = e[0]
            
            s_fmt = f"{s:02d}"
            e_fmt = f"{e:02d}"
            
            item['target_path'] = os.path.join(
                ROOT_DIR, "Séries", name, f"Temporada {s_fmt}", f"Episódio {e_fmt}{ext}"
            )

    async def execute_move(self):
        """Move os arquivos confirmados."""
        moved = 0
        n = ui.notification('Organizando biblioteca...', spinner=True, timeout=None)
        
        for item in self.preview_data:
            # Só move se tiver Status OK ou CHECK (confirmado pelo usuário) e tiver destino
            if not item['target_path'] or item['status'] == 'NAO_ENCONTRADO':
                continue
            
            try:
                # 1. Mover Vídeo
                src = os.path.join(item['original_root'], item['original_file'])
                dst = item['target_path']
                
                # Verifica colisão
                if os.path.exists(dst):
                    ui.notify(f"Pulei {os.path.basename(dst)} (Já existe)", type='warning')
                    continue
                
                os.makedirs(os.path.dirname(dst), exist_ok=True)
                shutil.move(src, dst)
                moved += 1
                
                # 2. Mover Legendas
                video_dst_stem = os.path.splitext(dst)[0] # Caminho sem extensão
                for sub in item['subtitles']:
                    sub_dst = video_dst_stem + sub['suffix'] # Ex: /path/Filme.forced.srt
                    if not os.path.exists(sub_dst):
                        shutil.move(sub['src'], sub_dst)
                        
            except Exception as e:
                ui.notify(f"Erro ao mover {item['original_file']}: {e}", type='negative')

        # 3. Limpeza Segura
        cleaned = 0
        sorted_folders = sorted(list(self.folders_to_clean), key=len, reverse=True)
        for folder in sorted_folders:
            if not os.path.exists(folder) or folder == ROOT_DIR: continue
            
            try:
                # Verifica se sobrou vídeo
                remaining = [f for f in os.listdir(folder) if os.path.splitext(f)[1].lower() in VIDEO_EXTENSIONS]
                
                # Verifica se sobrou subpasta não vazia
                has_subfolder = any(os.path.isdir(os.path.join(folder, f)) for f in os.listdir(folder))
                
                if not remaining and not has_subfolder:
                    shutil.rmtree(folder)
                    cleaned += 1
            except: pass
            
        n.dismiss()
        ui.notify(f'{moved} arquivos organizados. {cleaned} pastas limpas.', type='positive')
        return True

# ==============================================================================
# 4. INTERFACE GRÁFICA (NiceGUI) - CORRIGIDA
# ==============================================================================
def create_ui():
    organizer = MediaOrganizer()
    
    # Container principal que envolve tudo (substitui o layout de página)
    with ui.column().classes('w-full h-full p-0 gap-0'):
        
        # --- FALSO HEADER (ui.row em vez de ui.header) ---
        # Agora ele pode viver dentro de uma TabPanel sem dar erro
        with ui.row().classes('w-full bg-blue-900 text-white items-center p-2 shadow-md'):
            ui.icon('movie_filter', size='md')
            ui.label('Media Organizer Pro').classes('text-lg font-bold ml-2')
            ui.space()
            
            # Campo API Key
            with ui.row().classes('items-center gap-2'):
                key_input = ui.input('TMDb API Key', password=True).props('dense dark input-class=text-white outlined').classes('w-64')
                key_input.value = organizer.api_key
                ui.button(icon='save', on_click=lambda: organizer.set_api_key(key_input.value)).props('flat dense round color=white')

        # --- CONTAINER DE CONTEÚDO ---
        main_content = ui.column().classes('w-full p-4 gap-4')

    # --- DIALOGO DE RESOLUÇÃO MANUAL (Mantém igual) ---
    resolution_dialog = ui.dialog()
    
    def open_resolution_dialog(item, row_refresh_callback):
        with resolution_dialog, ui.card().classes('w-full max-w-4xl'):
            ui.label(f"Resolvendo: {item['original_file']}").classes('text-lg font-bold')
            ui.label(f"Identificado como: {item['guess_title']} ({item['guess_year']})").classes('text-gray-500')
            
            if not item['candidates']:
                ui.label('Nenhum resultado encontrado no TMDb.').classes('text-red font-bold')
            
            with ui.grid(columns=4).classes('w-full gap-4 mt-4'):
                for cand in item['candidates']:
                    if item['type'] == 'movie':
                        title = cand.get('title')
                        date = cand.get('release_date', '')
                        img = cand.get('poster_path')
                    else:
                        title = cand.get('name')
                        date = cand.get('first_air_date', '')
                        img = cand.get('poster_path')
                    
                    year = date[:4] if date else '????'
                    img_url = f"https://image.tmdb.org/t/p/w200{img}" if img else 'https://via.placeholder.com/200x300?text=No+Image'
                    
                    with ui.card().classes('cursor-pointer hover:bg-blue-50 p-0 gap-0 border').tight():
                        ui.image(img_url).classes('h-48 w-full object-cover')
                        with ui.column().classes('p-2 w-full'):
                            ui.label(title).classes('font-bold text-sm leading-tight text-ellipsis overflow-hidden')
                            ui.label(year).classes('text-xs text-gray-500')
                            ui.button('Selecionar', on_click=lambda c=cand: select_match(item, c, row_refresh_callback)).props('sm flat w-full')

            ui.button('Fechar', on_click=resolution_dialog.close).props('outline color=red').classes('mt-4 w-full')
        
        resolution_dialog.open()

    def select_match(item, match, refresh_cb):
        item['selected_match'] = match
        item['status'] = 'OK'
        organizer.calculate_path(item)
        resolution_dialog.close()
        refresh_cb()

    # --- VIEWS (Mantém igual) ---
    def render_explorer():
        main_content.clear()
        organizer.preview_data = [] 
        
        with main_content:
            # Barra de Navegação
            with ui.row().classes('w-full bg-gray-100 p-2 rounded items-center shadow-sm'):
                ui.icon('folder_open', color='grey')
                ui.label(organizer.path).classes('font-mono ml-2 mr-auto text-sm md:text-base truncate')
                
                async def run_analysis():
                    has_data = await organizer.analyze_folder()
                    if has_data: render_preview()
                
                ui.button('ANALISAR', on_click=run_analysis).props('push color=primary icon=search')

            # Lista de Arquivos
            try:
                entries = sorted(list(os.scandir(organizer.path)), key=lambda e: (not e.is_dir(), e.name.lower()))
                with ui.list().props('bordered separator dense').classes('w-full bg-white rounded shadow-sm'):
                    if organizer.path != ROOT_DIR:
                        ui.item(text='.. (Voltar)', on_click=lambda: navigate(os.path.dirname(organizer.path))).props('clickable icon=arrow_back')

                    for entry in entries:
                        if entry.name.startswith('.'): continue
                        
                        if entry.is_dir():
                            with ui.item(on_click=lambda p=entry.path: navigate(p)).props('clickable'):
                                with ui.item_section().props('avatar'):
                                    ui.icon('folder', color='amber')
                                ui.item_section(entry.name)
                        else:
                            ext = os.path.splitext(entry.name)[1].lower()
                            is_vid = ext in VIDEO_EXTENSIONS
                            color = 'blue' if is_vid else 'grey'
                            icon = 'movie' if is_vid else 'insert_drive_file'
                            
                            with ui.item():
                                with ui.item_section().props('avatar'):
                                    ui.icon(icon, color=color)
                                ui.item_section(entry.name).classes('text-sm')
            except Exception as e:
                ui.label(f"Erro ao ler pasta: {e}").classes('text-red')

    def render_preview():
        main_content.clear()
        with main_content:
            with ui.row().classes('w-full items-center justify-between mb-2'):
                ui.label('Revisão').classes('text-xl font-bold')
                with ui.row():
                    ui.button('Cancelar', on_click=render_explorer).props('outline color=red dense')
                    
                    async def run_move():
                        if await organizer.execute_move():
                            render_explorer()
                            
                    ui.button('MOVER', on_click=run_move).props('push color=green icon=check dense')

            with ui.column().classes('w-full gap-2'):
                # Cabeçalho da Lista
                with ui.row().classes('w-full bg-gray-200 p-2 font-bold text-sm rounded hidden md:flex'):
                    ui.label('Original').classes('w-1/3')
                    ui.label('Destino').classes('w-1/3')
                    ui.label('Status').classes('w-1/4 text-center')

                with ui.scroll_area().classes('h-[500px] w-full border rounded bg-white'):
                    def render_row(item):
                        # Usei refreshable aqui para que o botão atualize apenas a linha
                        @ui.refreshable
                        def row_content():
                            with ui.row().classes('w-full p-2 border-b items-center hover:bg-gray-50 text-sm'):
                                with ui.column().classes('w-full md:w-1/3'):
                                    ui.label(item['original_file']).classes('truncate font-medium w-full')
                                    ui.label(f"{item['type'].upper()} • {len(item['subtitles'])} leg.").classes('text-xs text-gray-500')

                                with ui.column().classes('w-full md:w-1/3'):
                                    if item['target_path']:
                                        rel_path = os.path.relpath(item['target_path'], ROOT_DIR)
                                        ui.label(rel_path).classes('text-blue-700 font-mono break-all text-xs')
                                    else:
                                        ui.label('---').classes('text-gray-400')

                                with ui.row().classes('w-full md:w-1/4 justify-center items-center gap-2'):
                                    status = item['status']
                                    color = 'green' if status == 'OK' else ('orange' if status == 'CHECK' else 'red')
                                    ui.badge(status, color=color).props('outline')
                                    
                                    if status != 'OK' and status != 'ERRO_S_E':
                                        ui.button(icon='search', on_click=lambda: open_resolution_dialog(item, row_content.refresh)).props('flat round dense color=primary')
                                    elif status == 'OK':
                                        ui.button(icon='edit', on_click=lambda: open_resolution_dialog(item, row_content.refresh)).props('flat round dense color=grey')
                        
                        row_content()

                    for item in organizer.preview_data:
                        render_row(item)

    def navigate(path):
        organizer.path = path
        render_explorer()

    # Inicia
    render_explorer()

# Removemos o ui.run() daqui, pois o main.py é quem controla o loop