#!/usr/bin/python
# PYTHON_ARGCOMPLETE_OK

import sys
import osex
import curses
import pprint
import locale
import textwrap
import argparse
import argcomplete
import ioex, ioex.cursesex, ioex.selector

class LocateRootNode(ioex.selector.Node):

    def __init__(
            self,
            window,
            patterns,
            match_all,
            ignore_case,
            database_path,
            update_database,
            update_require_visibility
            ):
        super(LocateRootNode, self).__init__()
        self._window = window
        self._patterns = [p for p in patterns if len(p) > 0]
        self._match_all = match_all
        self._ignore_case = ignore_case
        self._database_path = database_path
        self._update_database = update_database
        self._update_require_visibility = update_require_visibility
        self.refresh_children()

    def get_window_height(self):
        return self._window.getmaxyx()[0]

    def get_window_width(self):
        return self._window.getmaxyx()[1]

    def get_header_height(self):
        return self._header_height

    def show_patterns(self):
        label = 'patterns: '
        self._window.addstr(0, 0, label, curses.A_BOLD)
        # join patterns so textwrap.fill may be applied
        patterns_text = textwrap.fill(
            '\1'.join(self._patterns),
            # fixme: unwanted new lines occur if width is not decremented
            self.get_window_width() - 1,
            initial_indent = '#' * len(label),
            subsequent_indent = ' ' * len(label)
            )
        patterns_wrapped = patterns_text[len(label):].split('\1')
        for pattern_wrapped in patterns_wrapped:
            self._window.addstr(pattern_wrapped, curses.A_REVERSE)
            self._window.addstr(' ')
        self._window.refresh()
        self._header_height = patterns_text.count('\n') + 1
        # remove A_REVERSE attribute from ident blocks
        for row_index in range(1, self._header_height):
            self._window.addstr(row_index, 0, ' ' * len(label))

    def show_header(self):
        self.show_patterns()

    def refresh_children(self):
        self._window.clear()
        self.show_header()
        self._clear_children()
        if self._update_database:
            self._window.addstr(self.get_header_height(), 0, 'updating database... ')
            self._window.refresh()
            osex.update_locate_database(
                    database_path = self._database_path,
                    require_visibility = self._update_require_visibility
                    )
        self._window.addstr(self.get_header_height(), 0, 'searching database... ')
        self._window.clrtoeol()
        self._window.refresh()
        paths = osex.locate(
                    self._patterns,
                    match_all = self._match_all,
                    ignore_case = self._ignore_case,
                    database_path = self._database_path
                    )
        if len(paths) == 0:
            self._window.addstr(self.get_header_height(), 0, 'nothing found')
            self._window.clrtoeol()
            self._window.refresh()
        else:
            for path in paths:
                self._append_child(ioex.selector.StaticNode(path))

def locate_select(stdscr, patterns, match_all, ignore_case, update_database, multiple, database_path, update_require_visibility):

    curses.curs_set(0)

    root = LocateRootNode(
            stdscr,
            patterns,
            match_all,
            ignore_case,
            database_path,
            update_database,
            update_require_visibility
            )

    selection = ioex.selector.select(
        stdscr,
        root,
        multiple = multiple
        )

    if selection is None:
        return None
    else:
        return [n.get_label() for n in selection]

def _init_argparser():

    argparser = argparse.ArgumentParser(description = None)
    argparser.add_argument('--database-path')
    argparser.add_argument('--ignore-case', action='store_true')
    argparser.add_argument('--match-all', action='store_true')
    argparser.add_argument('--multiple', action='store_true')
    argparser.add_argument('--update-database', action='store_true')
    argparser.add_argument('--update-require-visibility', choices = ['yes', 'no'])
    argparser.add_argument('patterns', metavar = 'pattern', nargs = '+')
    return argparser

def main(argv):

    argparser = _init_argparser()
    argcomplete.autocomplete(argparser)
    args = argparser.parse_args(argv)
    params = vars(args)

    if args.update_require_visibility == 'yes':
        args.update_require_visibility = True
    elif args.update_require_visibility == 'no':
        args.update_require_visibility = False

    paths = ioex.cursesex.tty_wrapper(locate_select, **vars(args))
    if paths is None:
        return 1
    else:
        print('\n'.join(paths).encode(locale.getpreferredencoding()))
        return 0

if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))