import config
import search

import datetime
from datetime import datetime
import os
from os import path
import pathlib

import markdown

ENTRY_DIR = config.ENTRY_DIR
WEBSITE = config.WEBSITE


def gen_stand_string(path_ex):
    """
    Creates a html-string for a file.
    If the file is markdown it will convert it.
    This functions ensures upscaling for future formats.

    Parameters:
    path_ex: path to a file.

    Returns:
    string: html-formatted string string equivalent to the file
    """
    filename = os.path.join(ENTRY_DIR, path_ex)
    result = ""
    if path.exists(filename):
        title = open(filename,encoding="utf-8").readline().rstrip("\n").lstrip("#").lstrip(" ")
        text = open(filename,encoding="utf-8").readlines()[1:]
        filename_no_end = filename.split(".", 1)[0]
        result += "<h1>" + title + "</h1>\n"
        if filename.endswith(".md"):
            result += gen_md_content(filename, 1)
    return result


def gen_md_content(path_ex, depth):
    """
    Convert a markdown file to a html string.

    Parameters:
    path_ex (string): path to the markdown file
    depth (int): starting depth for markdown headings

    Returns:
    string: html-formatted string string equivalent to the markdown file
    """
    result = ""
    if path.exists(path_ex):
        filename = path_ex.split(".", 1)
        fileend = filename[len(filename) - 1]
        header = "#"
        for i in range(depth):
            header += "#"
        header += " "
        markdown_lines = open(path_ex, "r",encoding="utf-8").readlines()[1:]
        markdown_text = ""
        for line in markdown_lines:
            markdown_text += line.replace("# ", header)
        result = markdown.markdown(
            markdown_text, extensions=["fenced_code", "tables", "nl2br"])
    return result


def gen_arch_string(path_ex):
    """
    Creates and returns an index string of every file in the path_ex.

    Parameter:
    path_ex: path to the dir to show

    Returns:
    string: html-formatted archive-string
    """
    full_path = os.path.join(ENTRY_DIR, path_ex)
    if path.exists(full_path):
        name_list = os.listdir(full_path)
        full_list = [os.path.join(full_path, i) for i in name_list]
        contents = sorted(full_list, key=os.path.getctime)
        content_string = ""
        last_month = ""
        for file in reversed(contents):
            filename = pathlib.PurePath(file)
            if os.path.isfile(filename):
                title = open(filename).readline().rstrip("\n").lstrip("#").lstrip(" ")
                entry_or_namespace = "entry"
            elif os.path.isdir(filename):
                title = filename.name
                entry_or_namespace = "namespace"
            else:
                continue
            filename = filename.name
            if filename[0] != "." and filename.__contains__("."):
                filename = filename.split(".", 1)[0]
            content_string += "<li>"
            content_string += "<a href=\"" + "/"+ entry_or_namespace +"/" + \
                path_ex.rstrip("/") + "/" +  pathlib.PurePath(file).name + "\">" + title + "</a>"
            content_string += "<br>"
            content_string += "</li>\n"
        content_string += "</ul>\n"
        return content_string



def gen_query_res_string(query_str):
    """
    Return the results of a query.

    Parameters:
    query_str (string): term to search

    Returns:
    string: html-formated search result
    """
    src_results = search.search(query_str)
    res_string = ""
    res_string += "<ul>\n"
    for result in src_results:
        title = result["title"]
        path = result["path"]
        preview = create_preview(path)
        path = "/entry/" + path.split("/", 2)[2]
        res_string += "<li><a href=\"" + path + "\">" + markdown.markdown(title) + "</a><br>"
        res_string += "<div class=\"description\">" + preview + "</div>"
        res_string += "</li>"
    res_string += "</ul>\n"
    return res_string


def create_preview(path):
    """
    Create a preview of a given article and return it.

    Parameters:
    path (string): path to the article

    Returns:
    string: html-formated preview
    """
    file = open(path, "r",encoding="utf-8")
    first_lines = file.readlines()
    preview = ""
    preview_length = 3
    for i, line in enumerate(first_lines):
        if i == 0:
            continue
        if i > preview_length:
            break
        if not line.isspace():
            preview += markdown.markdown(line) + "<br>"
        else:
            preview_length += 1
    preview += "...<br>"
    return preview

print(gen_arch_string("system-software"))