import pandas as pd
import streamlit as st
import matplotlib.pyplot as plt
import matplotlib.font_manager as font_manager
import io
import base64
import os
from datetime import datetime, timedelta
import math
from matplotlib.patches import FancyBboxPatch
from pypinyin import lazy_pinyin, Style
from matplotlib.backends.backend_pdf import PdfPages

def get_font(size=14):
    font_path = "simHei.ttc"
    if not os.path.exists(font_path):
        font_path = "SimHei.ttf"
    return font_manager.FontProperties(fname=font_path, size=size)

def get_pinyin_abbr(text):
    """获取文本前两个汉字的拼音首字母"""
    if not text:
        return ""
    # 提取前两个汉字
    chars = [c for c in text if '\u4e00' <= c <= '\u9fff']
    if len(chars) < 2:
        chars = chars + [''] * (2 - len(chars))
    else:
        chars = chars[:2]
    # 获取拼音首字母
    pinyin_list = lazy_pinyin(chars, style=Style.FIRST_LETTER)
    return ''.join(pinyin_list).upper()

def process_schedule(file):
    try:
        date_df = pd.read_excel(file, header=None, skiprows=7, nrows=1, usecols=[3])
        date_str = pd.to_datetime(date_df.iloc[0, 0]).strftime('%Y-%m-%d')
        base_date = pd.to_datetime(date_str).date()
    except:
        date_str = datetime.today().strftime('%Y-%m-%d')
        base_date = datetime.today().date()
    
    try:
        df = pd.read_excel(file, header=9, usecols=[1, 2, 4, 5])
        df.columns = ['Hall', 'StartTime', 'EndTime', 'Movie']
        df['Hall'] = df['Hall'].ffill()
        df.dropna(subset=['StartTime', 'EndTime', 'Movie'], inplace=True)
        df['Hall'] = df['Hall'].astype(str).str.extract(r'(\d+号)')
        df['StartTime_dt'] = pd.to_datetime(df['StartTime'], format='%H:%M', errors='coerce').apply(
            lambda t: t.replace(year=base_date.year, month=base_date.month, day=base_date.day) if pd.notnull(t) else t
        )
        df['EndTime_dt'] = pd.to_datetime(df['EndTime'], format='%H:%M', errors='coerce').apply(
            lambda t: t.replace(year=base_date.year, month=base_date.month, day=base_date.day) if pd.notnull(t) else t
        )
        df.loc[df['EndTime_dt'] < df['StartTime_dt'], 'EndTime_dt'] += timedelta(days=1)
        df = df.sort_values(['Hall', 'StartTime_dt'])
        
        merged_rows = []
        for hall, group in df.groupby('Hall'):
            group = group.sort_values('StartTime_dt')
            current = None
            for _, row in group.iterrows():
                if current is None:
                    current = row.copy()
                else:
                    if row['Movie'] == current['Movie']:
                        current['EndTime_dt'] = row['EndTime_dt']
                    else:
                        merged_rows.append(current)
                        current = row.copy()
            if current is not None:
                merged_rows.append(current)
        
        merged_df = pd.DataFrame(merged_rows)
        
        # 将开始时间统一提前10分钟，结束时间统一提前5分钟
        merged_df['StartTime_dt'] = merged_df['StartTime_dt'] - timedelta(minutes=10)
        merged_df['EndTime_dt'] = merged_df['EndTime_dt'] - timedelta(minutes=5)
        
        merged_df['StartTime_str'] = merged_df['StartTime_dt'].dt.strftime('%H:%M')
        merged_df['EndTime_str'] = merged_df['EndTime_dt'].dt.strftime('%H:%M')
        
        return merged_df[['Hall', 'Movie', 'StartTime_str', 'EndTime_str']], date_str
    except:
        return None, date_str

def create_print_layout(data, date_str):
    if data is None or data.empty:
        return None
    
    # 创建PNG图像 - 使用A4纸张大小并最大化内容
    png_fig = plt.figure(figsize=(8.27, 11.69), dpi=300)
    png_ax = png_fig.add_subplot(111)
    png_ax.set_axis_off()
    # 为PNG设置更小的边距以最大化内容
    png_fig.subplots_adjust(left=0.02, right=0.98, top=0.98, bottom=0.02)
    
    # 创建PDF图像 - 使用A4纸张大小
    pdf_fig = plt.figure(figsize=(8.27, 11.69), dpi=300)
    pdf_ax = pdf_fig.add_subplot(111)
    pdf_ax.set_axis_off()
    # 为PDF设置更小的边距
    pdf_fig.subplots_adjust(left=0.02, right=0.98, top=0.98, bottom=0.02)
    
    # 处理两个图形的共同函数
    def process_figure(fig, ax, is_pdf=False):
        # Pre-load fonts
        date_font = get_font(12)
        # 使用更大的字体以最大化利用纸张空间
        font_size_multiplier = 1.2
        movie_font_size = 14 * font_size_multiplier
        hall_font_size = movie_font_size * 0.8
        hall_font = get_font(hall_font_size)
        movie_font = get_font(movie_font_size)
        
        ax.text(0.00, 1.00, date_str, fontsize=12 * font_size_multiplier, color='#A9A9A9',
                ha='left', va='top', fontproperties=date_font, transform=ax.transAxes, zorder=2)
        
        halls = sorted(data['Hall'].unique(), key=lambda h: int(h.replace('号','')) if h else 0)
        
        total_lines = sum(len(data[data['Hall'] == hall]) for hall in halls) + (len(halls) - 1)
        available_height = 0.98 - 0.02  # 增加可用高度
        line_spacing = available_height / total_lines if total_lines > 0 else 0.04
        y_position = 0.98
        
        for hall in halls:
            hall_data = data[data['Hall'] == hall]
            y_block_top = y_position
            hall_num = hall.replace("号", "")
            hall_text = f"${hall_num}^{{\\#}}$"
            movie_count = 1
            
            for _, row in hall_data.iterrows():
                ax.text(0.03, y_position, hall_text if movie_count == 1 else "",
                        fontsize=hall_font_size, fontweight='bold',
                        ha='left', va='top', fontproperties=hall_font,
                        transform=ax.transAxes, zorder=2)
                
                # 获取电影名前两个字的拼音首字母
                pinyin_abbr = get_pinyin_abbr(row['Movie'])
                
                # 电影名称左对齐，限制在0.2到0.6的区域内
                ax.text(0.20, y_position, f"{movie_count}. {pinyin_abbr} {row['Movie']}",
                        fontsize=movie_font_size, ha='left', va='top', fontproperties=movie_font,
                        transform=ax.transAxes, zorder=2, clip_on=True,
                        bbox=dict(boxstyle="square,pad=0.0", fc="none", ec="none", alpha=0))
                
                # 时间信息右对齐，固定在0.95位置
                ax.text(0.95, y_position, f"{row['StartTime_str']} - {row['EndTime_str']}",
                        fontsize=movie_font_size, ha='right', va='top', fontproperties=movie_font,
                        transform=ax.transAxes, zorder=2)
                
                y_position -= line_spacing
                movie_count += 1
            
            y_block_bottom = y_position
            y_position -= line_spacing
            rect = FancyBboxPatch((0.03, y_block_bottom), 0.94, y_block_top - y_block_bottom,
                                boxstyle="round,pad=0.005,rounding_size=0.005",
                                edgecolor='gray', facecolor='white',
                                linewidth=0.8, zorder=1, transform=ax.transAxes)
            ax.add_patch(rect)
    
    # 处理PNG图形
    process_figure(png_fig, png_ax)
    
    # 处理PDF图形
    process_figure(pdf_fig, pdf_ax, is_pdf=True)
    
    # 保存PNG图像 - 使用最小边距以最大化内容
    png_buffer = io.BytesIO()
    png_fig.savefig(png_buffer, format='png', bbox_inches='tight', pad_inches=0.05)
    png_buffer.seek(0)
    image_base64 = base64.b64encode(png_buffer.getvalue()).decode()
    plt.close(png_fig)
    
    # 保存PDF文件 - 使用最小边距
    pdf_buffer = io.BytesIO()
    with PdfPages(pdf_buffer) as pdf:
        pdf.savefig(pdf_fig, bbox_inches='tight', pad_inches=0.05)
    pdf_buffer.seek(0)
    pdf_base64 = base64.b64encode(pdf_buffer.getvalue()).decode()
    plt.close(pdf_fig)
    
    return {
        'png': f"data:image/png;base64,{image_base64}",
        'pdf': f"data:application/pdf;base64,{pdf_base64}"
    }

def display_pdf(base64_pdf):
    # 在Streamlit中显示PDF
    pdf_display = f"""
    <iframe src="{base64_pdf}" width="100%" height="800" type="application/pdf"></iframe>
    """
    return pdf_display

st.set_page_config(page_title="LED 屏幕时间表打印", layout="wide")
st.title("LED 屏幕时间表打印")

uploaded_file = st.file_uploader("选择打开【放映时间核对表.xls】文件", accept_multiple_files=False, type=["xls"])

if uploaded_file:
    with st.spinner("文件正在处理中，请稍候..."):
        schedule, date_str = process_schedule(uploaded_file)
        if schedule is not None:
            output = create_print_layout(schedule, date_str)
            
            # 创建选项卡以切换PNG和PDF视图
            tab1, tab2 = st.tabs(["PDF 预览", "PNG 预览"])
            
            with tab1:
                st.markdown(display_pdf(output['pdf']), unsafe_allow_html=True)
            
            with tab2:
                st.image(output['png'], use_container_width=True)
        else:
            st.error("无法处理文件，请检查文件格式或内容是否正确。")