import os, csv, inspect, json, textwrap
from datetime import datetime
from pathlib import Path

from lib import GalleryTable

GALLERY_ID = "gallery" # e.g. <div id="gallery"/> will turn into the gallery.

GALLERY_CONFIG_PATH = Path(__file__, "..", "nanogallery2-config.json").resolve()
JAVASCRIPT_OUTPUT_PATH = Path(__file__, "..", "gallery", "gallery.js").resolve()
HTML_OUTPUT_PATH = Path(__file__, "..", "gallery", "index.html").resolve()

TABLE_PATH = Path(__file__, "..", "gallery-items.csv").resolve()
MEDIA_FOLDER = Path(__file__, "..", "media").resolve()
THUMBNAIL_FOLDER = Path(__file__, "..", "thumbs").resolve()

def format_tags(tag_string):
  # Nanogallery2 expects space-separated tags,
  # which isn't intuitive in cases where you
  # want a tag to contain a space.
  # 
  # So instead, this script (and the table) expects comma-separated tags, 
  # then trims any whitespace from the start and end, 
  # replaces all normal spaces with non-breaking spaces ("&nbsp;") 
  # automatically, and finally puts normal spaces 
  # inbetween each tag, the way Nanogallery2 expects them.
  tags = []
  for tag in tag_string.split(","):
    tags.append(tag.strip().replace(" ", "&nbsp;"))
  return " ".join(tags)
  # If you want to use *commas* in a tag, I'm sorry.
  # Please let me know. I'll find a solution.
  # In the meantime, you can write "&comma;" whereever you need one.
  # I just don't want to get stuck overengineering 
  # this any harder than I already am BEFORE I have
  # something finished that most people can put to use.
  #
  # The setup for all this is already going to be a tall ask.
  # Installing Python and FFmpeg isn't something I'd ask of a parent.
  # Unless they're on Linux in which case it's like, super trivial to do.
  # But that's not most parents. I think? I think.
  # 
  # I mean, the reason this is all in Python to begin with
  # is purely so I only have to write it once, and people can
  # use it regardless of whether they use Windows, Linux, or Mac,
  # but also still readily look inside or tweak stuff easily.
  # And FFmpeg is required for the thumbnail generation stuff. 
  # So there *is* a point to it all, but every extra step of setup
  # I ask people to do gets me worried that it'll be The step
  # that makes someone give up on the whole thing...
  #
  # Anyway. That's why I reformat the tags here.
  # It's so you can have spaces in them easystyle.
  # You're welcome. Sorry again if you needed commas and stuff.


if __name__ == "__main__": # Only do this when the script is run directly
  
  table = GalleryTable.parse_table(TABLE_PATH)
  print("Found {} gallery items in {}.".format(len(table), TABLE_PATH))

  try:
    with open(GALLERY_CONFIG_PATH, "r") as file:
      gallery_config = json.load(file)
  except Exception as error:
    print("Could not find/load {}:".format(GALLERY_CONFIG_PATH))
    print(error)
    print("Continuing with default gallery configuration.")
    gallery_config = {}

  gallery_items = []

  print("Creating gallery javascript file...")

  for name, entry in table.items():
    gallery_items.append({
      "src": "/media/" + entry["File"],
      "srct": "/thumbs/" + entry["Thumbnail"],
      "title": entry["Title"],
      "description": entry["Description"],
      "tags": format_tags(entry["Tags (with commas in-between)"])
    })

  gallery_config["items"] = gallery_items
  
  output_js = inspect.cleandoc(
    """
    jQuery(document).ready(function () {{
      jQuery("#{gallery_id}").nanogallery2(
    {gallery_config}
      )
    }})
    """
  ).format(
    gallery_id=GALLERY_ID, 
    gallery_config=textwrap.indent(
      json.dumps(
        gallery_config, 
        indent=2
      ), "    ")
  )

  try:
    with open(JAVASCRIPT_OUTPUT_PATH, "w", encoding="utf-8") as js_output_file:
      js_output_file.write(output_js)

    print("All done!")
  except Exception as error:
    print("Could not write the javascript file:")
    print(error)
  
  input("Press Enter key to exit...")