#! /usr/bin/python3
import curses
from html.parser import HTMLParser
from mastodon import Mastodon

def initColours():
                       # 0: White on black
    curses.init_pair(1, 4, 0) # 1: Blue on black
    curses.init_pair(2, 1, 0) # 2: Red on black
    curses.init_pair(3, 6, 0) # 3: Cyan on black
    curses.init_pair(4, 2, 0) # 4: Green on black

def newLine(ncwin, lines=1):
    cy, cx = ncwin.getyx()
    # my, mx = ncwin.getmaxyx()
    try:
        ncwin.move(cy + lines, 0)
    except curses.error:
        pass

def bump(win):
    my, mx = win.getmaxyx()
    cy, cx = win.getyx()
    if cx < mx and cx != 0:
        try:
            win.move(cy, cx + 1)
        except curses.error:
            pass

def typeset(text, win, attr, colour):
    my, mx = win.getmaxyx()
    line = 0
    position = 0
    strlen = len(text)
    while position < (strlen):
        cy, cx = win.getyx()
        if cx == mx:
            if cy == my:
                raise curses.error("Out of space")
        rem = (mx - cx) + 0
        nsp = text.find(' ', position)
        if (strlen - position <= rem):
            win.addnstr(text[position:], rem,
                        attr | curses.color_pair(colour))
            position = strlen
        elif (nsp == -1 or nsp - position > rem): # and not strlen - position <= rem:
            if cx == 0:
                win.addnstr(text[position:], rem, attr |
                            curses.color_pair(colour))
                position = position + rem
            else:
                newLine(win)
        else:
            win.addnstr(text[position:], nsp - position,
                        attr | curses.color_pair(colour))
            position = max(nsp, 0) + 1
            bump(win)

def printPost(win, post, parser):
    # win.addstr(post["account"]["acct"], curses.A_BOLD)
    typeset("@{}".format(post["account"]["acct"]), win, curses.A_BOLD, 0)
    if (post["reblog"] is not None):
        # win.addstr(" boosted ")
        typeset(" boosted ", win, 0, 0)
        # win.addstr(post["reblog"]["account"]["acct"], curses.A_BOLD)
        typeset("@{}".format(post["reblog"]["account"]["acct"]), win, 
                curses.A_BOLD, 0)
    # win.addstr(":")
    typeset(":", win, 0, 0)
    newLine(win)
    if (post["spoiler_text"] != ""):
        # win.addstr(post["spoiler_text"], curses.A_UNDERLINE)
        typeset(post["spoiler_text"], win, curses.A_UNDERLINE, 0)
        newLine(win)
    parser.feed(post["content"])
    if parser.openp:
        newLine(win)

    for att in post["media_attachments"]:
        # typeset("[IMG: {}, <{}>]".format(att["alt"], att["src"]))
        typeset("[IMG: {}]".format(att["description"] if
                                         att["description"] is not None
                                         else "(Alt text missing)"),
               win, 0, 4)
        newLine(win)

    if (post["reblog"] is not None):
        for att in post["reblog"]["media_attachments"]:
            # typeset("[IMG: {}, <{}>]".format(att["alt"], att["src"]))
            typeset("[IMG: {}]".format(att["description"] if
                                             att["description"] is not None
                                             else "(Alt text missing)"),
                   win, 0, 4)
            newLine(win)

    botstring = "{} @ {} UTC".format(post["visibility"],
                                     post["created_at"
                                         ].strftime(
                                             "%Y-%m-%d %H:%M:%S"))
    cy, cx = win.getyx()
    my, mx = win.getmaxyx()
    # win.addstr(cy, mx - len(botstring), botstring, curses.A_UNDERLINE)
    win.move(cy, mx - len(botstring))
    typeset(botstring, win, curses.A_UNDERLINE, 0)

    newLine(win, 1)

def printAtLevel(stdscr, col1, col2, posts, parser, level):
    col1.clear()
    col2.clear()
    col1.move(0, 0)
    col2.move(0, 0)
    printPost(col1, posts[level], parser)
    newLine(col1)
    printPost(col1, posts[(level + 1) % len(posts)], parser)
    try:
        col2.addstr(str(posts[level]["content"]))
        col2.addstr(str(posts[level]["media_attachments"]))
        col2.addstr(str(posts[level].keys()))
    except curses.error:
        pass
    stdscr.noutrefresh()
    col1.noutrefresh()
    col2.noutrefresh()
    curses.doupdate()

class PostParser(HTMLParser):
    def __init__(self, ncwin, defncatt):
        HTMLParser.__init__(self)
        self.win = ncwin
        self.defncatt = defncatt
        self.curatt = defncatt
        self.openp = False
        self.colour = 0
        self.colstack = []

    def handle_starttag(self, tag, attrs):
        if tag == 'p':
            self.curatt = self.defncatt
            self.colstack = []
            self.colour = 0
            # newLine(self.win)
        elif tag == 'strong' or tag == 'b':
            self.curatt = self.curatt ^ curses.A_REVERSE
        elif tag == 'em' or tag == 'i':
            self.curatt = self.curatt ^ curses.A_BOLD
        elif tag == 'br':
            newLine(self.win)
        elif tag == 'a':
            self.colstack.append(self.colour)
            self.colour = 1
        elif tag == 'code':
            self.colstack.append(self.colour)
            self.colour = 3
        elif tag == 'img':
            typeset("[IMG: {}, <{}>]".format(att["alt"], att["src"]), self.win,
                   0, 4)


    def handle_endtag(self, tag):
        if tag == 'p':
            newLine(self.win, 2)
            self.openp = False
        elif tag == 'strong' or tag == 'b':
            self.curatt = self.curatt ^ curses.A_REVERSE
        elif tag == 'em' or tag == 'i':
            self.curatt = self.curatt ^ curses.A_BOLD
        elif tag == 'a':
            self.colour = self.colstack.pop()
        elif tag == 'code':
            self.colour = self.colstack.pop()

    def handle_data(self, data):
        try:
            # self.win.addstr(data, self.curatt | curses.color_pair(self.colour))
            typeset(data, self.win, self.curatt, self.colour)
        except curses.error:
            pass
        self.openp = True


# print(mastodon.timeline()[0]["content"])


def main(stdscr):
    initColours()
    mastodon = Mastodon(
            access_token = 'd100.club_usercred.secret',
            api_base_url = 'd100.club'
    )
    posts = mastodon.timeline()
    stdscr.clear()
    # stdscr.addstr("test")
    curses.halfdelay(10)
    my, mx = stdscr.getmaxyx()
    c1w = c2w = (mx - 3) // 2
    if (mx % 2) != 0:
        c2w = c2w - 1
    colw1 = curses.newwin(my - 2, c1w, 1, 1)
    colw2 = curses.newwin(my - 2, c2w, 1, 1 + c1w + 2)
    stdscr.border()
    # colw1.border()
    # colw2.border()
    parser = PostParser(colw1, 0)
    # colw1.move(0,0)
    # stdscr.addstr(0, 0, 'test')
    # colw2.addstr(0, 0, 'test2')
    # colw1.addstr(0, 0, 'test3')
    i = 'c'
    q = 0
    printAtLevel(stdscr, colw1, colw2, posts, parser, q)
    con = True
    while con:
        i = stdscr.getch()
        if (i == ord('q')):
            con = False
        elif (i == ord('j')):
            q = (q + 1) % len(posts)
            printAtLevel(stdscr, colw1, colw2, posts, parser, q)
        elif (i == ord('k')):
            q = (q - 1) % len(posts)
            printAtLevel(stdscr, colw1, colw2, posts, parser, q)

curses.wrapper(main)