# Copyright 2019 Ecosoft Co., Ltd (http://ecosoft.co.th/)
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)

import base64
from odoo import api, fields, models, _
from odoo.tools.safe_eval import safe_eval
from odoo.exceptions import UserError
from odoo.addons.queue_job.job import job


# Define all supported report_type
REPORT_TYPES_FUNC = {'qweb-pdf': 'render_qweb_pdf',
                     'qweb-text': 'render_qweb_text',
                     'qweb-xml': 'render_qweb_xml',
                     'csv': 'render_csv',
                     'excel': 'render_excel',
                     'xlsx': 'render_xlsx', }


class ReportAsync(models.Model):
    _name = 'report.async'
    _description = 'Report Async'

    action_id = fields.Many2one(
        comodel_name='ir.actions.act_window',
        string='Reports',
        required=True,
    )
    allow_async = fields.Boolean(
        string='Allow Async',
        default=False,
        help="This is not automatic field, please check if you want to allow "
        "this report in background process",
    )
    name = fields.Char(
        string='Name',
        related='action_id.display_name',
    )
    email_notify = fields.Boolean(
        string='Email Notification',
        help="Send email with link to report, when it is ready",
    )
    group_ids = fields.Many2many(
        string='Groups',
        comodel_name='res.groups',
        help="Only user in selected groups can use this report."
        "If left blank, everyone can use",
    )
    job_ids = fields.Many2many(
        comodel_name='queue.job',
        compute='_compute_job',
        help="List all jobs related to this running report",
    )
    job_status = fields.Selection(
        selection=[('pending', 'Pending'),
                   ('enqueued', 'Enqueued'),
                   ('started', 'Started'),
                   ('done', 'Done'),
                   ('failed', 'Failed')],
        compute='_compute_job',
        help="Latest Job Status",
    )
    job_info = fields.Text(
        compute='_compute_job',
        help="Latest Job Error Message",
    )
    file_ids = fields.Many2many(
        comodel_name='ir.attachment',
        compute='_compute_file',
        help="List all files created by this report background process",
    )

    @api.multi
    def _compute_job(self):
        for rec in self:
            rec.job_ids = self.sudo().env['queue.job'].search(
                [('func_string', 'like', 'report.async(%s,)' % rec.id),
                 ('user_id', '=', self._uid)],
                order='id desc')
            rec.job_status = (rec.job_ids[0].sudo().state
                              if rec.job_ids else False)
            rec.job_info = (rec.job_ids[0].sudo().exc_info
                            if rec.job_ids else False)

    @api.multi
    def _compute_file(self):
        files = self.env['ir.attachment'].search(
            [('res_model', '=', 'report.async'),
             ('res_id', 'in', self.ids),
             ('create_uid', '=', self._uid)],
            order='id desc')
        for rec in self:
            rec.file_ids = files.filtered(lambda l: l.res_id == rec.id)

    def run_now(self):
        self.ensure_one()
        action = self.env.ref(self.action_id.xml_id)
        result = action.read()[0]
        ctx = safe_eval(result.get('context', {}))
        ctx.update({'async_process': False})
        result['context'] = ctx
        return result

    @api.multi
    def run_async(self):
        self.ensure_one()
        if not self.allow_async:
            raise UserError(_('Background process not allowed.'))
        action = self.env.ref(self.action_id.xml_id)
        result = action.read()[0]
        ctx = safe_eval(result.get('context', {}))
        ctx.update({'async_process': True})
        result['context'] = ctx
        return result

    @api.multi
    def view_files(self):
        self.ensure_one()
        action = self.env.ref('report_async.action_view_files')
        result = action.read()[0]
        result['domain'] = [('id', 'in', self.file_ids.ids)]
        return result

    @api.multi
    def view_jobs(self):
        self.ensure_one()
        action = self.env.ref('queue_job.action_queue_job')
        result = action.read()[0]
        result['domain'] = [('id', 'in', self.job_ids.ids)]
        result['context'] = {}
        return result

    @api.model
    @job
    def run_report(self, docids, data, report_id, user_id):
        report = self.env['ir.actions.report'].browse(report_id)
        func = REPORT_TYPES_FUNC[report.report_type]
        # Run report
        out_file, file_ext = getattr(report, func)(docids, data)
        out_file = base64.b64encode(out_file)
        out_name = '%s.%s' % (report.name, file_ext)
        # Save report to attachment
        attachment = self.env['ir.attachment'].sudo().create({
            'name': out_name,
            'datas': out_file,
            'datas_fname': out_name,
            'type': 'binary',
            'res_model': 'report.async',
            'res_id': self.id,
        })
        self._cr.execute("""
            UPDATE ir_attachment SET create_uid = %s, write_uid = %s
            WHERE id = %s""", (self._uid, self._uid, attachment.id))
        # Send email
        if self.email_notify:
            self._send_email(attachment)

    def _send_email(self, attachment):
        template = self.env.ref('report_async.async_report_delivery')
        template.send_mail(attachment.id,
                           notif_layout='mail.mail_notification_light',
                           force_send=False)