#!/usr/bin/env python3
import json, argparse, os
from pathlib import Path

parser = argparse.ArgumentParser(
    description="Convert vimium's json config file to markdown");
parser.add_argument('vimium_options', type=Path,
    help='File generated by "Click to download backup"');
parser.add_argument('output_file', type=Path,
    help='Markdown file generated');
args = parser.parse_args();

try:
    with open(args.vimium_options, mode='r') as vimium_json:
        j = json.load(vimium_json)
except FileNotFoundError:
    print(f"`{args.vimium_options}` does not exist")
    exit(1)

if os.path.isfile(args.output_file):
    print(f"File `{args.output_file}` already exists. "
          "Refusing to overwrite");
    exit(1)

output = open(args.output_file, mode='w')

def writeln(string: str):
    output.write(string + '\n')

# Heading ====
writeln("# Vimium's options backup")
writeln(f"""\
This is a markdown render of vimium's options version {j['settingsVersion']}. Copy/pasting them
into vimium should work with future versions too. Storing them as a markdown
file is better for version control (git and codeberg)
""")

# Save keys ====
writeln("## Excluded URLs and keys")

left_width = len(max([p['pattern'] for p in j["exclusionRules"]], key=len));
title = "Patterns"

writeln("```")
writeln(f"{title:{left_width}}    Excluded keys")
for rule in j["exclusionRules"]:
    writeln(f"{rule['pattern']:{left_width}} ::{(' ' + rule['passKeys']).strip()}")
writeln("```")

# Key mappings ====
writeln("\n## Custom key mappings")
writeln("Quotes are comments, just like in vimscript\n")
writeln("```")
for key in j['keyMappings'].split('\n'):
    writeln(key)
writeln("```")

# Seach engines ====
writeln("\n## Custom search engines")
writeln("These get activated through \"o\". Hashes are comments\n")
writeln("```")
for engine in j['searchEngines'].split('\n'):
    writeln(engine)
writeln("```")

writeln("\n# Advanced options")

# Checkbox options ====
writeln("\n## Miscellaneous options")
b = lambda x: "Check" if x else "Blank";
writeln("```")
writeln(f"{b(j['smoothScroll']):5} :: Use smooth scrolling")
writeln(f"{b(j['filterLinkHints']):5} :: Use link characters for link-hint filtering")
writeln(f"{b(j['grabBackFocus']):5} :: Don't let pages steal focus on load")
writeln(f"{b(j['hideHud']):5} :: Hide Heads Up Display in insert mode")
writeln(f"{b(j['regexFindMode']):5} :: Treat queries are JS regex expressions")
writeln(f"{b(j['ignoreKeyboardLayout']):5} :: Ignore keyboard layout")
writeln("```\n")

# More stuff ====
writeln("\n## More advanced options")
writeln("```")
writeln(f"              Scroll step size: {j['scrollStepSize']}px")
writeln(f"Characters used for link hints: {j['linkHintCharacters']}")
writeln(f"             Previous patterns: {j['previousPatterns']}")
writeln(f"                 Next patterns: {j['nextPatterns']}")
writeln(f"                   New tab URL: {j['newTabUrl']}")
writeln(f"         Default search engine: {j['searchUrl']}")
writeln("```")

# CSS ====
writeln("\n# Vimium CSS")
writeln("```css")
for line in j['userDefinedLinkHintCss'].split('\n'):
    writeln(line.strip())
writeln("\n```")

writeln("")
output.close()