import json
from datetime import datetime, timedelta

from babel.dates import format_datetime, format_date

from odoo import models, api, _, fields
from odoo.release import version
from odoo.tools import DEFAULT_SERVER_DATE_FORMAT as DF
from odoo.tools.misc import formatLang

class account_journal(models.Model):
    _inherit = "account.journal"

    @api.one
    def _kanban_dashboard(self):
        self.kanban_dashboard = json.dumps(self.get_journal_dashboard_datas())

    @api.one
    def _kanban_dashboard_graph(self):
        if (self.type in ['sale', 'purchase']):
            self.kanban_dashboard_graph = json.dumps(self.get_bar_graph_datas())
        elif (self.type in ['cash', 'bank']):
            self.kanban_dashboard_graph = json.dumps(self.get_line_graph_datas())

    kanban_dashboard = fields.Text(compute='_kanban_dashboard')
    kanban_dashboard_graph = fields.Text(compute='_kanban_dashboard_graph')
    show_on_dashboard = fields.Boolean(string='Show journal on dashboard', help="Whether this journal should be displayed on the dashboard or not", default=True)
    color = fields.Integer("Color Index", default=0)
    account_setup_bank_data_done = fields.Boolean(string='Bank setup marked as done', related='company_id.account_setup_bank_data_done', help="Technical field used in the special view for the setup bar step.")

    def _graph_title_and_key(self):
        if self.type == 'sale':
            return ['', _('Sales: Untaxed Total')]
        elif self.type == 'purchase':
            return ['', _('Purchase: Untaxed Total')]
        elif self.type == 'cash':
            return ['', _('Cash: Balance')]
        elif self.type == 'bank':
            return ['', _('Bank: Balance')]

    @api.multi
    def get_line_graph_datas(self):
        data = []
        today = datetime.today()
        last_month = today + timedelta(days=-30)
        bank_stmt = []
        # Query to optimize loading of data for bank statement graphs
        # Return a list containing the latest bank statement balance per day for the
        # last 30 days for current journal
        query = """SELECT a.date, a.balance_end
                        FROM account_bank_statement AS a,
                            (SELECT c.date, max(c.id) AS stmt_id
                                FROM account_bank_statement AS c
                                WHERE c.journal_id = %s
                                    AND c.date > %s
                                    AND c.date <= %s
                                    GROUP BY date, id
                                    ORDER BY date, id) AS b
                        WHERE a.id = b.stmt_id;"""

        self.env.cr.execute(query, (self.id, last_month, today))
        bank_stmt = self.env.cr.dictfetchall()

        last_bank_stmt = self.env['account.bank.statement'].search([('journal_id', 'in', self.ids),('date', '<=', last_month.strftime(DF))], order="date desc, id desc", limit=1)
        start_balance = last_bank_stmt and last_bank_stmt[0].balance_end or 0

        locale = self._context.get('lang') or 'en_US'
        show_date = last_month
        #get date in locale format
        name = format_date(show_date, 'd LLLL Y', locale=locale)
        short_name = format_date(show_date, 'd MMM', locale=locale)
        data.append({'x':short_name,'y':start_balance, 'name':name})

        for stmt in bank_stmt:
            #fill the gap between last data and the new one
            number_day_to_add = (datetime.strptime(stmt.get('date'), DF) - show_date).days
            last_balance = data[len(data) - 1]['y']
            for day in range(0,number_day_to_add + 1):
                show_date = show_date + timedelta(days=1)
                #get date in locale format
                name = format_date(show_date, 'd LLLL Y', locale=locale)
                short_name = format_date(show_date, 'd MMM', locale=locale)
                data.append({'x': short_name, 'y':last_balance, 'name': name})
            #add new stmt value
            data[len(data) - 1]['y'] = stmt.get('balance_end')

        #continue the graph if the last statement isn't today
        if show_date != today:
            number_day_to_add = (today - show_date).days
            last_balance = data[len(data) - 1]['y']
            for day in range(0,number_day_to_add):
                show_date = show_date + timedelta(days=1)
                #get date in locale format
                name = format_date(show_date, 'd LLLL Y', locale=locale)
                short_name = format_date(show_date, 'd MMM', locale=locale)
                data.append({'x': short_name, 'y':last_balance, 'name': name})

        [graph_title, graph_key] = self._graph_title_and_key()
        color = '#875A7B' if '+e' in version else '#7c7bad'
        return [{'values': data, 'title': graph_title, 'key': graph_key, 'area': True, 'color': color}]

    @api.multi
    def get_bar_graph_datas(self):
        data = []
        today = datetime.strptime(fields.Date.context_today(self), DF)
        data.append({'label': _('Past'), 'value':0.0, 'type': 'past'})
        day_of_week = int(format_datetime(today, 'e', locale=self._context.get('lang') or 'en_US'))
        first_day_of_week = today + timedelta(days=-day_of_week+1)
        for i in range(-1,4):
            if i==0:
                label = _('This Week')
            elif i==3:
                label = _('Future')
            else:
                start_week = first_day_of_week + timedelta(days=i*7)
                end_week = start_week + timedelta(days=6)
                if start_week.month == end_week.month:
                    label = str(start_week.day) + '-' +str(end_week.day)+ ' ' + format_date(end_week, 'MMM', locale=self._context.get('lang') or 'en_US')
                else:
                    label = format_date(start_week, 'd MMM', locale=self._context.get('lang') or 'en_US')+'-'+format_date(end_week, 'd MMM', locale=self._context.get('lang') or 'en_US')
            data.append({'label':label,'value':0.0, 'type': 'past' if i<0 else 'future'})

        # Build SQL query to find amount aggregated by week
        (select_sql_clause, query_args) = self._get_bar_graph_select_query()
        query = ''
        start_date = (first_day_of_week + timedelta(days=-7))
        for i in range(0,6):
            if i == 0:
                query += "("+select_sql_clause+" and date < '"+start_date.strftime(DF)+"')"
            elif i == 5:
                query += " UNION ALL ("+select_sql_clause+" and date >= '"+start_date.strftime(DF)+"')"
            else:
                next_date = start_date + timedelta(days=7)
                query += " UNION ALL ("+select_sql_clause+" and date >= '"+start_date.strftime(DF)+"' and date < '"+next_date.strftime(DF)+"')"
                start_date = next_date

        self.env.cr.execute(query, query_args)
        query_results = self.env.cr.dictfetchall()
        for index in range(0, len(query_results)):
            if query_results[index].get('aggr_date') != None:
                data[index]['value'] = query_results[index].get('total')

        [graph_title, graph_key] = self._graph_title_and_key()
        return [{'values': data, 'title': graph_title, 'key': graph_key}]

    def _get_bar_graph_select_query(self):
        """
        Returns a tuple containing the base SELECT SQL query used to gather
        the bar graph's data as its first element, and the arguments dictionary
        for it as its second.
        """
        return ("""SELECT sum(residual_company_signed) as total, min(date) as aggr_date
               FROM account_invoice
               WHERE journal_id = %(journal_id)s and state = 'open'""", {'journal_id':self.id})

    @api.multi
    def get_journal_dashboard_datas(self):
        currency = self.currency_id or self.company_id.currency_id
        number_to_reconcile = last_balance = account_sum = 0
        title = ''
        number_draft = number_waiting = number_late = 0
        sum_draft = sum_waiting = sum_late = 0.0
        if self.type in ['bank', 'cash']:
            last_bank_stmt = self.env['account.bank.statement'].search([('journal_id', 'in', self.ids)], order="date desc, id desc", limit=1)
            last_balance = last_bank_stmt and last_bank_stmt[0].balance_end or 0
            #Get the number of items to reconcile for that bank journal
            self.env.cr.execute("""SELECT COUNT(DISTINCT(line.id))
                            FROM account_bank_statement_line AS line
                            LEFT JOIN account_bank_statement AS st
                            ON line.statement_id = st.id
                            WHERE st.journal_id IN %s AND st.state = 'open' AND line.amount != 0.0
                            AND not exists (select 1 from account_move_line aml where aml.statement_line_id = line.id)
                        """, (tuple(self.ids),))
            number_to_reconcile = self.env.cr.fetchone()[0]
            # optimization to read sum of balance from account_move_line
            account_ids = tuple(ac for ac in [self.default_debit_account_id.id, self.default_credit_account_id.id] if ac)
            if account_ids:
                amount_field = 'balance' if (not self.currency_id or self.currency_id == self.company_id.currency_id) else 'amount_currency'
                query = """SELECT sum(%s) FROM account_move_line WHERE account_id in %%s AND date <= %%s;""" % (amount_field,)
                self.env.cr.execute(query, (account_ids, fields.Date.today(),))
                query_results = self.env.cr.dictfetchall()
                if query_results and query_results[0].get('sum') != None:
                    account_sum = query_results[0].get('sum')
        #TODO need to check if all invoices are in the same currency than the journal!!!!
        elif self.type in ['sale', 'purchase']:
            title = _('Bills to pay') if self.type == 'purchase' else _('Invoices owed to you')

            (query, query_args) = self._get_open_bills_to_pay_query()
            self.env.cr.execute(query, query_args)
            query_results_to_pay = self.env.cr.dictfetchall()

            (query, query_args) = self._get_draft_bills_query()
            self.env.cr.execute(query, query_args)
            query_results_drafts = self.env.cr.dictfetchall()

            today = datetime.today()
            query = """SELECT amount_total, currency_id AS currency, type FROM account_invoice WHERE journal_id = %s AND date < %s AND state = 'open';"""
            self.env.cr.execute(query, (self.id, today))
            late_query_results = self.env.cr.dictfetchall()
            (number_waiting, sum_waiting) = self._count_results_and_sum_amounts(query_results_to_pay, currency)
            (number_draft, sum_draft) = self._count_results_and_sum_amounts(query_results_drafts, currency)
            (number_late, sum_late) = self._count_results_and_sum_amounts(late_query_results, currency)

        difference = currency.round(last_balance-account_sum) + 0.0
        return {
            'number_to_reconcile': number_to_reconcile,
            'account_balance': formatLang(self.env, currency.round(account_sum) + 0.0, currency_obj=currency),
            'last_balance': formatLang(self.env, currency.round(last_balance) + 0.0, currency_obj=currency),
            'difference': formatLang(self.env, difference, currency_obj=currency) if difference else False,
            'number_draft': number_draft,
            'number_waiting': number_waiting,
            'number_late': number_late,
            'sum_draft': formatLang(self.env, currency.round(sum_draft) + 0.0, currency_obj=currency),
            'sum_waiting': formatLang(self.env, currency.round(sum_waiting) + 0.0, currency_obj=currency),
            'sum_late': formatLang(self.env, currency.round(sum_late) + 0.0, currency_obj=currency),
            'currency_id': currency.id,
            'bank_statements_source': self.bank_statements_source,
            'title': title,
        }

    def _get_open_bills_to_pay_query(self):
        """
        Returns a tuple contaning the SQL query used to gather the open bills
        data as its first element, and the arguments dictionary to use to run
        it as its second.
        """
        return ("""SELECT state, amount_total, currency_id AS currency, type
                  FROM account_invoice
                  WHERE journal_id = %(journal_id)s AND state = 'open';""", {'journal_id':self.id})

    def _get_draft_bills_query(self):
        """
        Returns a tuple containing as its first element the SQL query used to
        gather the bills in draft state data, and the arguments
        dictionary to use to run it as its second.
        """
        return ("""SELECT state, amount_total, currency_id AS currency, type
                  FROM account_invoice
                  WHERE journal_id = %(journal_id)s AND state = 'draft';""", {'journal_id':self.id})

    def _count_results_and_sum_amounts(self, results_dict, target_currency):
        """ Loops on a query result to count the total number of invoices and sum
        their amount_total field (expressed in the given target currency).
        """
        rslt_count = 0
        rslt_sum = 0.0
        for result in results_dict:
            cur = self.env['res.currency'].browse(result.get('currency'))
            rslt_count += 1

            type_factor = result.get('type') in ('in_refund', 'out_refund') and -1 or 1
            rslt_sum += type_factor * cur.compute(result.get('amount_total'), target_currency)
        return (rslt_count, rslt_sum)

    @api.multi
    def action_create_new(self):
        ctx = self._context.copy()
        model = 'account.invoice'
        if self.type == 'sale':
            ctx.update({'journal_type': self.type, 'default_type': 'out_invoice', 'type': 'out_invoice', 'default_journal_id': self.id})
            if ctx.get('refund'):
                ctx.update({'default_type':'out_refund', 'type':'out_refund'})
            view_id = self.env.ref('account.invoice_form').id
        elif self.type == 'purchase':
            ctx.update({'journal_type': self.type, 'default_type': 'in_invoice', 'type': 'in_invoice', 'default_journal_id': self.id})
            if ctx.get('refund'):
                ctx.update({'default_type': 'in_refund', 'type': 'in_refund'})
            view_id = self.env.ref('account.invoice_supplier_form').id
        else:
            ctx.update({'default_journal_id': self.id, 'view_no_maturity': True})
            view_id = self.env.ref('account.view_move_form').id
            model = 'account.move'
        return {
            'name': _('Create invoice/bill'),
            'type': 'ir.actions.act_window',
            'view_type': 'form',
            'view_mode': 'form',
            'res_model': model,
            'view_id': view_id,
            'context': ctx,
        }

    @api.multi
    def create_cash_statement(self):
        ctx = self._context.copy()
        ctx.update({'journal_id': self.id, 'default_journal_id': self.id, 'default_journal_type': 'cash'})
        return {
            'name': _('Create cash statement'),
            'type': 'ir.actions.act_window',
            'view_type': 'form',
            'view_mode': 'form',
            'res_model': 'account.bank.statement',
            'context': ctx,
        }

    @api.multi
    def action_open_reconcile(self):
        if self.type in ['bank', 'cash']:
            # Open reconciliation view for bank statements belonging to this journal
            bank_stmt = self.env['account.bank.statement'].search([('journal_id', 'in', self.ids)])
            return {
                'type': 'ir.actions.client',
                'tag': 'bank_statement_reconciliation_view',
                'context': {'statement_ids': bank_stmt.ids, 'company_ids': self.mapped('company_id').ids},
            }
        else:
            # Open reconciliation view for customers/suppliers
            action_context = {'show_mode_selector': False, 'company_ids': self.mapped('company_id').ids}
            if self.type == 'sale':
                action_context.update({'mode': 'customers'})
            elif self.type == 'purchase':
                action_context.update({'mode': 'suppliers'})
            return {
                'type': 'ir.actions.client',
                'tag': 'manual_reconciliation_view',
                'context': action_context,
            }

    @api.multi
    def open_action(self):
        """return action based on type for related journals"""
        action_name = self._context.get('action_name', False)
        if not action_name:
            if self.type == 'bank':
                action_name = 'action_bank_statement_tree'
            elif self.type == 'cash':
                action_name = 'action_view_bank_statement_tree'
            elif self.type == 'sale':
                action_name = 'action_invoice_tree1'
            elif self.type == 'purchase':
                action_name = 'action_invoice_tree2'
            else:
                action_name = 'action_move_journal_line'

        _journal_invoice_type_map = {
            ('sale', None): 'out_invoice',
            ('purchase', None): 'in_invoice',
            ('sale', 'refund'): 'out_refund',
            ('purchase', 'refund'): 'in_refund',
            ('bank', None): 'bank',
            ('cash', None): 'cash',
            ('general', None): 'general',
        }
        invoice_type = _journal_invoice_type_map[(self.type, self._context.get('invoice_type'))]

        ctx = self._context.copy()
        ctx.pop('group_by', None)
        ctx.update({
            'journal_type': self.type,
            'default_journal_id': self.id,
            'default_type': invoice_type,
            'type': invoice_type
        })

        [action] = self.env.ref('account.%s' % action_name).read()
        if not self.env.context.get('use_domain'):
            ctx['search_default_journal_id'] = self.id
        action['context'] = ctx
        action['domain'] = self._context.get('use_domain', [])
        account_invoice_filter = self.env.ref('account.view_account_invoice_filter', False)
        if action_name in ['action_invoice_tree1', 'action_invoice_tree2']:
            action['search_view_id'] = account_invoice_filter and account_invoice_filter.id or False
        if action_name in ['action_bank_statement_tree', 'action_view_bank_statement_tree']:
            action['views'] = False
            action['view_id'] = False
        return action

    @api.multi
    def open_spend_money(self):
        return self.open_payments_action('outbound')

    @api.multi
    def open_collect_money(self):
        return self.open_payments_action('inbound')

    @api.multi
    def open_transfer_money(self):
        return self.open_payments_action('transfer')

    @api.multi
    def open_payments_action(self, payment_type):
        ctx = self._context.copy()
        ctx.update({
            'default_payment_type': payment_type,
            'default_journal_id': self.id
        })
        ctx.pop('group_by', None)
        action_rec = self.env['ir.model.data'].xmlid_to_object('account.action_account_payments')
        if action_rec:
            action = action_rec.read([])[0]
            action['context'] = ctx
            action['domain'] = [('journal_id','=',self.id),('payment_type','=',payment_type)]
            return action

    @api.multi
    def open_action_with_context(self):
        action_name = self.env.context.get('action_name', False)
        if not action_name:
            return False
        ctx = dict(self.env.context, default_journal_id=self.id)
        if ctx.get('search_default_journal', False):
            ctx.update(search_default_journal_id=self.id)
        ctx.pop('group_by', None)
        ir_model_obj = self.env['ir.model.data']
        model, action_id = ir_model_obj.get_object_reference('account', action_name)
        [action] = self.env[model].browse(action_id).read()
        action['context'] = ctx
        if ctx.get('use_domain', False):
            action['domain'] = ['|', ('journal_id', '=', self.id), ('journal_id', '=', False)]
            action['name'] += ' for journal ' + self.name
        return action

    @api.multi
    def create_bank_statement(self):
        """return action to create a bank statements. This button should be called only on journals with type =='bank'"""
        self.bank_statements_source = 'manual'
        action = self.env.ref('account.action_bank_statement_tree').read()[0]
        action.update({
            'views': [[False, 'form']],
            'context': "{'default_journal_id': " + str(self.id) + "}",
        })
        return action

    #####################
    # Setup Steps Stuff #
    #####################
    @api.model
    def retrieve_account_dashboard_setup_bar(self):
        """ Returns the data used by the setup bar on the Accounting app dashboard."""
        company = self.env.user.company_id
        return {
            'show_setup_bar': not company.account_setup_bar_closed,
            'company': company.account_setup_company_data_done,
            'bank': company.account_setup_bank_data_done,
            'fiscal_year': company.account_setup_fy_data_done,
            'chart_of_accounts': company.account_setup_coa_done,
            'initial_balance': company.opening_move_posted(),
        }

    def mark_bank_setup_as_done_action(self):
        """ Marks the 'bank setup' step as done in the setup bar and in the company."""
        self.company_id.account_setup_bank_data_done = True

    def unmark_bank_setup_as_done_action(self):
        """ Marks the 'bank setup' step as not done in the setup bar and in the company."""
        self.company_id.account_setup_bank_data_done = False