# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2010-2012 OpenERP s.a. (<http://openerp.com>).
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

""" Helper functions for reports testing.

    Please /do not/ import this file by default, but only explicitly call it
    through the code of yaml tests.
"""

import openerp
import openerp.report
import openerp.tools as tools
import logging
from openerp.tools.safe_eval import safe_eval
from subprocess import Popen, PIPE
import os
import tempfile

_logger = logging.getLogger(__name__)
_test_logger = logging.getLogger('openerp.tests')


def try_report(cr, uid, rname, ids, data=None, context=None, our_module=None, report_type=None):
    """ Try to render a report <rname> with contents of ids
    
        This function should also check for common pitfalls of reports.
    """
    if data is None:
        data = {}
    if context is None:
        context = {}
    if rname.startswith('report.'):
        rname_s = rname[7:]
    else:
        rname_s = rname
    _test_logger.info("  - Trying %s.create(%r)", rname, ids)
    res = openerp.report.render_report(cr, uid, ids, rname_s, data, context)
    if not isinstance(res, tuple):
        raise RuntimeError("Result of %s.create() should be a (data,format) tuple, now it is a %s" % \
                                (rname, type(res)))
    (res_data, res_format) = res

    if not res_data:
        raise ValueError("Report %s produced an empty result!" % rname)

    if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], rname+ '.'+res_format), 'wb+').write(res_data)

    _logger.debug("Have a %s report for %s, will examine it", res_format, rname)
    if res_format == 'pdf':
        if res_data[:5] != '%PDF-':
            raise ValueError("Report %s produced a non-pdf header, %r" % (rname, res_data[:10]))

        res_text = False
        try:
            fd, rfname = tempfile.mkstemp(suffix=res_format)
            os.write(fd, res_data)
            os.close(fd)

            proc = Popen(['pdftotext', '-enc', 'UTF-8', '-nopgbrk', rfname, '-'], shell=False, stdout=PIPE)
            stdout, stderr = proc.communicate()
            res_text = tools.ustr(stdout)
            os.unlink(rfname)
        except Exception:
            _logger.debug("Unable to parse PDF report: install pdftotext to perform automated tests.")

        if res_text is not False:
            for line in res_text.split('\n'):
                if ('[[' in line) or ('[ [' in line):
                    _logger.error("Report %s may have bad expression near: \"%s\".", rname, line[80:])
            # TODO more checks, what else can be a sign of a faulty report?
    elif res_format == 'html':
        pass
    else:
        _logger.warning("Report %s produced a \"%s\" chunk, cannot examine it", rname, res_format)
        return False

    _test_logger.info("  + Report %s produced correctly.", rname)
    return True

def try_report_action(cr, uid, action_id, active_model=None, active_ids=None,
                wiz_data=None, wiz_buttons=None,
                context=None, our_module=None):
    """Take an ir.action.act_window and follow it until a report is produced

        :param action_id: the integer id of an action, or a reference to xml id
                of the act_window (can search [our_module.]+xml_id
        :param active_model, active_ids: call the action as if it had been launched
                from that model+ids (tree/form view action)
        :param wiz_data: a dictionary of values to use in the wizard, if needed.
                They will override (or complete) the default values of the
                wizard form.
        :param wiz_buttons: a list of button names, or button icon strings, which
                should be preferred to press during the wizard.
                Eg. 'OK' or 'gtk-print'
        :param our_module: the name of the calling module (string), like 'account'
    """
    if not our_module and isinstance(action_id, basestring):
        if '.' in action_id:
            our_module = action_id.split('.', 1)[0]

    if context is None:
        context = {}
    else:
        context = context.copy() # keep it local
    # TODO context fill-up

    registry = openerp.registry(cr.dbname)

    def log_test(msg, *args):
        _test_logger.info("  - " + msg, *args)

    datas = {}
    if active_model:
        datas['model'] = active_model
    if active_ids:
        datas['ids'] = active_ids

    if not wiz_buttons:
        wiz_buttons = []

    if isinstance(action_id, basestring):
        if '.' in action_id:
            act_module, act_xmlid = action_id.split('.', 1)
        else:
            if not our_module:
                raise ValueError('You cannot only specify action_id "%s" without a module name' % action_id)
            act_module = our_module
            act_xmlid = action_id
        act_model, act_id = registry['ir.model.data'].get_object_reference(cr, uid, act_module, act_xmlid)
    else:
        assert isinstance(action_id, (long, int))
        act_model = 'ir.action.act_window'     # assume that
        act_id = action_id
        act_xmlid = '<%s>' % act_id

    def _exec_action(action, datas, context):
        # taken from client/modules/action/main.py:84 _exec_action()
        if isinstance(action, bool) or 'type' not in action:
            return
        # Updating the context : Adding the context of action in order to use it on Views called from buttons
        if datas.get('id',False):
            context.update( {'active_id': datas.get('id',False), 'active_ids': datas.get('ids',[]), 'active_model': datas.get('model',False)})
        context1 = action.get('context', {})
        if isinstance(context1, basestring):
            context1 = safe_eval(context1, context.copy())
        context.update(context1)
        if action['type'] in ['ir.actions.act_window', 'ir.actions.submenu']:
            for key in ('res_id', 'res_model', 'view_type', 'view_mode',
                    'limit', 'auto_refresh', 'search_view', 'auto_search', 'search_view_id'):
                datas[key] = action.get(key, datas.get(key, None))

            view_id = False
            if action.get('views', []):
                if isinstance(action['views'],list):
                    view_id = action['views'][0][0]
                    datas['view_mode']= action['views'][0][1]
                else:
                    if action.get('view_id', False):
                        view_id = action['view_id'][0]
            elif action.get('view_id', False):
                view_id = action['view_id'][0]

            assert datas['res_model'], "Cannot use the view without a model"
            # Here, we have a view that we need to emulate
            log_test("will emulate a %s view: %s#%s",
                        action['view_type'], datas['res_model'], view_id or '?')

            view_res = registry[datas['res_model']].fields_view_get(cr, uid, view_id, action['view_type'], context)
            assert view_res and view_res.get('arch'), "Did not return any arch for the view"
            view_data = {}
            if view_res.get('fields',{}).keys():
                view_data = registry[datas['res_model']].default_get(cr, uid, view_res['fields'].keys(), context)
            if datas.get('form'):
                view_data.update(datas.get('form'))
            if wiz_data:
                view_data.update(wiz_data)
            _logger.debug("View data is: %r", view_data)

            for fk, field in view_res.get('fields',{}).items():
                # Default fields returns list of int, while at create()
                # we need to send a [(6,0,[int,..])]
                if field['type'] in ('one2many', 'many2many') \
                        and view_data.get(fk, False) \
                        and isinstance(view_data[fk], list) \
                        and not isinstance(view_data[fk][0], tuple) :
                    view_data[fk] = [(6, 0, view_data[fk])]

            action_name = action.get('name')
            try:
                from xml.dom import minidom
                cancel_found = False
                buttons = []
                dom_doc = minidom.parseString(view_res['arch'])
                if not action_name:
                    action_name = dom_doc.documentElement.getAttribute('name')

                for button in dom_doc.getElementsByTagName('button'):
                    button_weight = 0
                    if button.getAttribute('special') == 'cancel':
                        cancel_found = True
                        continue
                    if button.getAttribute('icon') == 'gtk-cancel':
                        cancel_found = True
                        continue
                    if button.getAttribute('default_focus') == '1':
                        button_weight += 20
                    if button.getAttribute('string') in wiz_buttons:
                        button_weight += 30
                    elif button.getAttribute('icon') in wiz_buttons:
                        button_weight += 10
                    string = button.getAttribute('string') or '?%s' % len(buttons)

                    buttons.append( { 'name': button.getAttribute('name'),
                                'string': string,
                                'type': button.getAttribute('type'),
                                'weight': button_weight,
                                })
            except Exception, e:
                _logger.warning("Cannot resolve the view arch and locate the buttons!", exc_info=True)
                raise AssertionError(e.args[0])

            if not datas['res_id']:
                # it is probably an orm_memory object, we need to create
                # an instance
                datas['res_id'] = registry[datas['res_model']].create(cr, uid, view_data, context)

            if not buttons:
                raise AssertionError("view form doesn't have any buttons to press!")

            buttons.sort(key=lambda b: b['weight'])
            _logger.debug('Buttons are: %s', ', '.join([ '%s: %d' % (b['string'], b['weight']) for b in buttons]))

            res = None
            while buttons and not res:
                b = buttons.pop()
                log_test("in the \"%s\" form, I will press the \"%s\" button.", action_name, b['string'])
                if not b['type']:
                    log_test("the \"%s\" button has no type, cannot use it", b['string'])
                    continue
                if b['type'] == 'object':
                    #there we are! press the button!
                    fn =  getattr(registry[datas['res_model']], b['name'])
                    if not fn:
                        _logger.error("The %s model doesn't have a %s attribute!", datas['res_model'], b['name'])
                        continue
                    res = fn(cr, uid, [datas['res_id'],], context)
                    break
                else:
                    _logger.warning("in the \"%s\" form, the \"%s\" button has unknown type %s",
                        action_name, b['string'], b['type'])
            return res

        elif action['type']=='ir.actions.report.xml':
            if 'window' in datas:
                del datas['window']
            if not datas:
                datas = action.get('datas')
                if not datas:
                    datas = action.get('data')
            datas = datas.copy()
            ids = datas.get('ids')
            if 'ids' in datas:
                del datas['ids']
            res = try_report(cr, uid, 'report.'+action['report_name'], ids, datas, context, our_module=our_module)
            return res
        else:
            raise Exception("Cannot handle action of type %s" % act_model)

    log_test("will be using %s action %s #%d", act_model, act_xmlid, act_id)
    action = registry[act_model].read(cr, uid, [act_id], context=context)[0]
    assert action, "Could not read action %s[%s]" %(act_model, act_id)
    loop = 0
    while action:
        loop += 1
        # This part tries to emulate the loop of the Gtk client
        if loop > 100:
            _logger.error("Passed %d loops, giving up", loop)
            raise Exception("Too many loops at action")
        log_test("it is an %s action at loop #%d", action.get('type', 'unknown'), loop)
        result = _exec_action(action, datas, context)
        if not isinstance(result, dict):
            break
        datas = result.get('datas', {})
        if datas:
            del result['datas']
        action = result

    return True

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