import code, re, string, StringIO, sys
import buffer, color, completer, lex, method, mode, mode.mini, mode.consolemini, window
from subprocess import Popen, PIPE, STDOUT
from mode.python import PythonGrammar
from point import Point

class IpythonExec(method.Method):
    def _execute(self, w, **vargs):
        if w.application.completion_window_is_open():
            w.application.close_completion_buffer()
        s = w.buffer.make_string()
        w.mode.history[-1] = s
        w.mode.history.append('')
        w.buffer.set_data('')
        w.mode.hindex = len(w.mode.history) - 1

        b = w.mode.get_ipython()
        a = w.application
        if a.window().buffer is not b:
            a.switch_buffer(b)
        p = a.get_mini_buffer_prompt()
        b.insert_string(b.get_buffer_end(), p + s + '\n', force=True)

        b.pipe_write("ENTER:%s" % s)
        w.mode.read_sync()

class IpythonTab(method.Method):
    def execute(self, w, **vargs):
        a = w.application
        s = w.buffer.make_string()

        x2 = w.logical_cursor().x
        if not s or s[:x2].isspace():
            w.insert_string_at_cursor(' ' * w.mode.tabwidth)
            return

        r = re.compile('^[a-zA-Z0-9_.]$')
        line = s
        x1 = x2
        while x1 > 0 and r.match(s[x1 - 1]):
            x1 -= 1
        word = line[x1:x2]

        b = w.mode.get_ipython()
        b.pipe_write("COMPLETE:%s" % word)
        candidates = b.pipe_read_completions()
        w.mode.read_sync()

        if candidates:
            s = completer.find_common_string(candidates)
            w.buffer.delete(Point(x1, 0), Point(x2, 0), force=True)
            w.insert_string_at_cursor(s)
            mode.mini.use_completion_window(a, s, candidates)
        elif a.completion_window_is_open():
            a.close_completion_buffer()

class IpythonPathStart(method.Method):
    '''Interactively run python statements in the context of a buffer'''
    def _start(self, w, parent):
        a = w.application
        if w.buffer.btype == 'ipython':
            b = w.buffer
        else:
            name = buffer.IpythonBuffer.create_name(parent)
            if not a.has_buffer_name(name):
                b = buffer.IpythonBuffer(parent, a)
                a.add_buffer(b)
                window.Window(b, a)
            else:
                b = a.get_buffer_by_name(name)
        self.main_buffer = b
        if a.window().buffer is not b:
            a.switch_buffer(b)
        f = lambda x: None
        w.application.open_mini_buffer('*** ', f, self, None, 'ipythonmini')
    def execute(self, w, **vargs):
        self._start(w, w.buffer)

class IpythonStart(IpythonPathStart):
    '''Interactively run python statements'''
    def execute(self, w, **vargs):
        self._start(w, None)

class IpythonPageUp(mode.consolemini.ConsolePageUp):
    subbuf = '*IPython*'
class IpythonPageDown(mode.consolemini.ConsolePageDown):
    subbuf = '*IPython*'
class IpythonGotoBeginning(mode.consolemini.ConsoleGotoBeginning):
    subbuf = '*IPython*'
class IpythonGotoEnd(mode.consolemini.ConsoleGotoEnd):
    subbuf = '*IPython*'

class IpythonMini(mode.Fundamental):
    modename = 'IpythonMini'
    actions  = [IpythonExec, IpythonTab, IpythonStart, IpythonPathStart,
                IpythonPageUp, IpythonPageDown, IpythonGotoBeginning, IpythonGotoEnd]
    def get_ipython(self):
        return self.window.buffer.method.main_buffer
    def read_sync(self):
        b = self.get_ipython()
        b.pipe_read()
        self.window.application.set_mini_buffer_prompt(b.prompt)
    def __init__(self, w):
        mode.Fundamental.__init__(self, w)
        self.history = ['']
        self.hindex  = 0
        b = self.window.buffer.method.main_buffer
        assert hasattr(b, 'pipe')
        self.window.application.set_mini_buffer_prompt(b.prompt)
        self.add_bindings('ipython-exec', ('RETURN',))
        self.add_bindings('console-clear', ('C-l',))
        self.add_bindings('console-cancel', ('C-]',))
        self.add_bindings('console-history-prev', ('C-p', 'UP'))
        self.add_bindings('console-history-next', ('C-n', 'DOWN'))
        self.add_bindings('ipython-tab', ('TAB',))
        self.add_bindings('ipython-page-up', ('M-v',))
        self.add_bindings('ipython-page-down', ('C-v',))
        self.add_bindings('ipython-goto-beginning', ('M-<',))
        self.add_bindings('ipython-goto-end', ('M->',))
        for c in string.letters + string.digits + string.punctuation:
            self.add_binding('insert-string-%s' % c, c)

install = IpythonMini.install