import os

articles_path = 'articles/'
generate_path = 'pages/'
atom_content = ""
index_content = "<h2>Articles</h2><ul>"

"""Parse le fichier markdown et retourne le contenu à mettre dans notre page html"""
def parsemd(filename):
    content = {'content': '', 'title': '', 'date': '', 'description': '', 'filename': generate_path + filename.split('.')[0] + '.html'}
    inquote, inpre, inul = False, False, False
    for line in open('../' + articles_path + filename, "r"):
        line = line.strip()

        # Récupère la date
        if line.startswith('date:'):
            content['date'] = line.split(':')[1].strip()
        
        # Récupère la description
        if line.startswith('description:'):
            content['description'] = line.split(':')[1].strip()
        
        # Ferme la citation si on ne cite plus
        if inquote and not line.startswith(">"):
            content['content'] += "</blockquote>\n"
            inquote = False
        
        # Ferme la liste si on ne liste plus
        if inul and not line.startswith("-"):
            content['content'] += "</li></ul>\n"
            inul = False
        
        # Vérifie si on est dans un bloc de code
        if line.startswith("```"):
            if inpre:
                content['content'] += "</code></pre>\n"

            content['content'] += "<pre><code>" + line.lstrip("```")
            inpre = True

        # Vérifie si on est dans une citation
        elif line.startswith(">"):
            if inquote:
                content['content'] += parseline(line.lstrip("> "))
            else: 
                content['content'] += "<blockquote>" + parseline(line.lstrip("> "))
                inquote = True

        # Vérifie si on est dans un listing
        elif line.startswith("-"):
            if inul:
                content['content'] += "</li>\n"
                content['content'] += "<li>" + parseline(line.lstrip("- "))
            else:
                content['content'] += "<ul><li>" + parseline(line.lstrip("- "))
                inul = True
        
        # Vérifie si on est dans un titre
        elif line.startswith("###"):
            content['content'] += "<h3>" + parseline(line.lstrip("# ")) + "</h3>\n"
        elif line.startswith("##"):
            content['content'] += "<h2>" + parseline(line.lstrip("# ")) + "</h2>\n"
        elif line.startswith("#"):
            content['title'] += parseline(line.lstrip("# "))

        # Sinon, on est dans un paragraphe
        elif line != " " and line != "":
            content['content'] += "<p>" + parseline(line) + "</p>\n"
    # Vérification que chaque balise est bien fermée
    if inquote:
        content['content'] += "</blockquote>\n"
        inquote = False

    if inul:
        content['content'] += "</li></ul>\n"
        inul = False
        
    if inpre:
        content['content'] += "</code></pre>\n"
        inpre = False
    return content
            
def parseline(line):
    # Vérifie si on a des italiques ou gras
    while '*' in line:
        line = line.replace('*', '<i>', 1)
        line = line.replace('*', '</i>', 1)
    while '**' in line:
        line = line.replace('**', '<b>', 1)
        line = line.replace('**', '</b>', 1)

    # Vérifie si on a des images
    while '![' in line and ']' in line:
        title = line.split(']')[0].split('[')[1]
        link = line.split(']')[1].split('(')[1].split(')')[0]
        line = line.replace('![' + title + '](' + link + ')', '<img src="' + link + '" alt="' + title + '"/>')
            
    # Vérifie si on a des liens
    while '[' in line and ']' in line:
        title = line.split(']')[0].split('[')[1]
        link = line.split(']')[1].split('(')[1].split(')')[0]
        line = line.replace('[' + title + '](' + link + ')', '<a href="' + link + '">' + title + '</a>')
    return line

def md2html(filename):
    content = parsemd(filename) # Contenu parsé de notre fichier markdown
    template = open('page_template.html', 'r').read()

    # Création du fichier html & ajout du contenu
    output = open('../' + generate_path + filename.split('.')[0] + '.html', 'w')
    output.write(template.replace("$CONTENT", content['content']).replace("$TITLE", content['title']).
     replace("$DATE", content['date']).replace("$DESC", content['description']))
    output.close()

    # Génération du post Atom et de l'index
    generatePageXML(content)
    global index_content
    index_content += '<li><a href="' + content['filename'] + '">' + content['title'] + '</a></li>\n'

""" Génère le post Atom"""
def generatePageXML(data):
    global atom_content
    template = open('atom_post_template.xml', 'r').read()
    atom_content += template.replace("$TITLE", data['title']).replace("$DATE", data['date']).replace("$CONTENT", 
     data['content']).replace("$URL", "https://blog.arka.rocks/" + data['filename'])

""" Génère le fichier Atom"""
def generateAtom():
    template = open('atom_template.xml', 'r').read()
    output = open('../atom.xml', 'w')
    output.write(template.replace("$CONTENT", atom_content))
    output.close()

""" Génère l'index"""
def updateIndex():
    template = open('index_template.html', 'r').read()
    output = open('../index.html', 'w')
    output.write(template.replace("$CONTENT", index_content + '</ul>'))
    output.close()

if __name__=="__main__":
    if not os.path.exists('../' + generate_path):
        os.mkdir('../' + generate_path)
    else: # Régénation du blog
        for file in os.listdir('../' + generate_path):
            os.remove('../' + generate_path + file)
        os.remove('../atom.xml')
        os.remove('../index.html')

    for file in os.listdir('../' + articles_path):
        print("Génération en cours du fichier: " + file)
        md2html(file)
        print("Génération du fichier RSS / Atom")
        generateAtom()
        print("Génération de l'index")
        updateIndex()