import base64

from odoo import api, fields, models

TYPE_MAP = {
    "subscription": "subscribed",
    "transfer": "transfered",
    "sell_back": "resold",
}

REPORT_DIC = {
    "subscription": (
        "easy_my_coop_taxshelter_report.action_tax_shelter_subscription_report",
        "Tax Shelter Subscription",
    ),
    "shares": (
        "easy_my_coop_taxshelter_report.action_tax_shelter_shares_report",
        "Tax Shelter Shares",
    ),
}


class TaxShelterDeclaration(models.Model):

    _name = "tax.shelter.declaration"
    _description = "Tax Shelter Declaration"

    name = fields.Char(string="Declaration year", required=True)
    fiscal_year = fields.Char(String="Fiscal year", required=True)
    tax_shelter_certificates = fields.One2many(
        "tax.shelter.certificate",
        "declaration_id",
        string="Tax shelter certificates",
        readonly=True,
    )
    date_from = fields.Date(string="Date from", required=True)
    date_to = fields.Date(string="Date to", required=True)
    month_from = fields.Char(String="Month from", required=True)
    month_to = fields.Char(String="Month to", required=True)
    tax_shelter_percentage = fields.Selection(
        [("30", "30%"), ("45", "45%")],
        string="Tax Shelter percentage",
        required=True,
    )
    state = fields.Selection(
        [
            ("draft", "Draft"),
            ("computed", "Computed"),
            ("validated", "Validated"),
        ],
        string="State",
        required=True,
        default="draft",
    )
    company_id = fields.Many2one(
        "res.company",
        string="Company",
        required=True,
        change_default=True,
        readonly=True,
        default=lambda self: self.env["res.company"]._company_default_get(),
    )
    tax_shelter_capital_limit = fields.Float(
        string="Tax shelter capital limit", required=True
    )
    previously_subscribed_capital = fields.Float(
        String="Capital previously subscribed", readonly=True
    )
    excluded_cooperator = fields.Many2many(
        "res.partner",
        string="Excluded cooperator",
        domain=[("cooperator", "=", True)],
        help="If these cooperator have"
        " subscribed share during the time"
        " frame of this Tax Shelter "
        "Declaration. They will be marked "
        "as non eligible",
    )

    def _excluded_from_declaration(self, entry):
        if entry.date >= self.date_from and entry.date <= self.date_to:
            declaration = self
        else:
            declaration = self.search(
                [
                    ("date_from", "<=", entry.date),
                    ("date_to", ">=", entry.date),
                ]
            )
        if entry.partner_id.id in declaration.excluded_cooperator.ids:
            return True
        return False

    def _prepare_line(self, certificate, entry, ongoing_capital_sub, excluded):
        line_vals = {}
        line_vals["tax_shelter_certificate"] = certificate.id
        line_vals["share_type"] = entry.share_product_id.id
        line_vals["share_short_name"] = entry.share_short_name
        line_vals["share_unit_price"] = entry.share_unit_price
        line_vals["quantity"] = entry.quantity
        line_vals["transaction_date"] = entry.date
        line_vals["type"] = TYPE_MAP[entry.type]
        if entry.type == "subscription":
            if not excluded:
                capital_after_sub = (
                    ongoing_capital_sub + entry.total_amount_line
                )
            else:
                capital_after_sub = ongoing_capital_sub
            line_vals["capital_before_sub"] = ongoing_capital_sub
            line_vals["capital_after_sub"] = capital_after_sub
            line_vals["capital_limit"] = self.tax_shelter_capital_limit
            if (
                ongoing_capital_sub < self.tax_shelter_capital_limit
                and not excluded
            ):
                line_vals["tax_shelter"] = True
        return line_vals

    def _compute_certificates(self, entries, partner_certificate):
        ongoing_capital_sub = 0.0
        for entry in entries:
            certificate = partner_certificate.get(entry.partner_id.id, False)

            if not certificate:
                # create a certificate for this cooperator
                cert_vals = {}
                cert_vals["declaration_id"] = self.id
                cert_vals["partner_id"] = entry.partner_id.id
                cert_vals[
                    "cooperator_number"
                ] = entry.partner_id.cooperator_register_number
                certificate = self.env["tax.shelter.certificate"].create(
                    cert_vals
                )
                partner_certificate[entry.partner_id.id] = certificate
            excluded = self._excluded_from_declaration(entry)
            line_vals = self._prepare_line(
                certificate, entry, ongoing_capital_sub, excluded
            )
            certificate.write({"lines": [(0, 0, line_vals)]})

            if entry.type == "subscription" and not excluded:
                ongoing_capital_sub += entry.total_amount_line

        return partner_certificate

    @api.multi
    def compute_declaration(self):
        self.ensure_one()
        entries = self.env["subscription.register"].search(
            [
                ("partner_id.is_company", "=", False),
                ("date", "<=", self.date_to),
                ("type", "in", ["subscription", "sell_back", "transfer"]),
            ]
        )

        subscriptions = entries.filtered(
            lambda r: r.type == "subscription" and r.date < self.date_from
        )  # noqa
        cap_prev_sub = 0.0
        for subscription in subscriptions:
            cap_prev_sub += subscription.total_amount_line

        self.previously_subscribed_capital = cap_prev_sub

        partner_cert = {}

        partner_cert = self._compute_certificates(entries, partner_cert)

        self.state = "computed"

    @api.multi
    def validate_declaration(self):
        self.ensure_one()
        self.tax_shelter_certificates.write({"state": "validated"})
        self.state = "validated"

    @api.multi
    def reset_declaration(self):
        self.ensure_one()
        if not self.state == "validated":
            self.tax_shelter_certificates.unlink()
            self.state = "draft"


class TaxShelterCertificate(models.Model):
    _name = "tax.shelter.certificate"
    _inherit = ["portal.mixin"]
    _description = "Tax Shelter Certificate"
    _order = "cooperator_number asc"

    cooperator_number = fields.Integer(
        string="Cooperator number", required=True, readonly=True
    )
    partner_id = fields.Many2one(
        "res.partner", string="Cooperator", required=True, readonly=True
    )
    state = fields.Selection(
        [
            ("draft", "Draft"),
            ("validated", "Validated"),
            ("no_eligible", "No eligible"),
            ("sent", "Sent"),
        ],
        string="State",
        required=True,
        default="draft",
    )
    declaration_id = fields.Many2one(
        "tax.shelter.declaration",
        string="Declaration",
        required=True,
        readonly=True,
        ondelete="restrict",
    )
    lines = fields.One2many(
        "certificate.line",
        "tax_shelter_certificate",
        string="Certificate lines",
        readonly=True,
    )
    previously_subscribed_lines = fields.One2many(
        compute="_compute_certificate_lines",
        comodel_name="certificate.line",
        string="Previously Subscribed lines",
        readonly=True,
    )
    previously_subscribed_eligible_lines = fields.One2many(
        compute="_compute_certificate_lines",
        comodel_name="certificate.line",
        string="Previously Subscribed eligible lines",
        readonly=True,
    )
    subscribed_lines = fields.One2many(
        compute="_compute_certificate_lines",
        comodel_name="certificate.line",
        string="Shares subscribed",
        readonly=True,
    )
    resold_lines = fields.One2many(
        compute="_compute_certificate_lines",
        comodel_name="certificate.line",
        string="Shares resold",
        readonly=True,
    )
    transfered_lines = fields.One2many(
        compute="_compute_certificate_lines",
        comodel_name="certificate.line",
        string="Shares transfered",
        readonly=True,
    )
    total_amount_previously_subscribed = fields.Float(
        compute="_compute_amounts", string="Total previously subscribed"
    )
    total_amount_eligible_previously_subscribed = fields.Float(
        compute="_compute_amounts",
        string="Total eligible previously subscribed",
    )
    total_amount_subscribed = fields.Float(
        compute="_compute_amounts", string="Total subscribed"
    )
    total_amount_eligible = fields.Float(
        compute="_compute_amounts",
        string="Total amount eligible To Tax shelter",
    )
    total_amount_resold = fields.Float(
        compute="_compute_amounts", string="Total resold"
    )
    total_amount_transfered = fields.Float(
        compute="_compute_amounts", string="Total transfered"
    )
    total_amount = fields.Float(
        compute="_compute_amounts", string="Total", readonly=True
    )
    company_id = fields.Many2one(
        related="declaration_id.company_id", string="Company"
    )

    def _compute_access_url(self):
        super()._compute_access_url()
        for certificate in self:
            certificate.access_url = "/my/tax_shelter_certificates/%s" % (
                certificate.id
            )

    def generate_pdf_report(self, report_type):
        report, name = REPORT_DIC[report_type]
        report = self.env.ref(report).render_qweb_pdf(self.id)[0]
        report = base64.b64encode(report)
        report_name = (
            self.partner_id.name
            + " "
            + name
            + " "
            + self.declaration_id.name
            + ".pdf"
        )

        return (report_name, report)

    def generate_certificates_report(self):
        attachments = []
        if self.total_amount_eligible > 0:
            attachments.append(self.generate_pdf_report("subscription"))
        if self.partner_id.total_value > 0:
            attachments.append(self.generate_pdf_report("shares"))
        # if self.total_amount_resold > 0 or self.total_amount_transfered > 0:
        # TODO
        return attachments

    @api.multi
    def send_certificates(self):
        tax_shelter_mail_template = self.env.ref(
            "easy_my_coop_taxshelter_report.email_template_tax_shelter_certificate",
            False,
        )
        for certificate in self:
            if (
                certificate.total_amount_eligible
                + certificate.total_amount_eligible_previously_subscribed
                > 0
            ):
                attachments = certificate.generate_certificates_report()
                if len(attachments) > 0:
                    tax_shelter_mail_template.send_mail_with_multiple_attachments(
                        certificate.id, attachments, True
                    )
                certificate.state = "sent"
            else:
                certificate.state = "no_eligible"
            # pylint: disable=invalid-commit
            # fixme while you're here, please fix the query
            #  to pass pylint invalid-commit
            #  Use of cr.commit() directly is dangerous
            #  More info https://github.com/OCA/odoo-community.org/blob/master/website/Contribution/CONTRIBUTING.rst#never-commit-the-transaction  # noqa

            # Note: c'est n'est pas executé par du rpc-client mais via un
            # cron. En sachant que l'on ne veut pas faire de roll back de
            # toute la transaction parce que justement des mails sont
            # envoyés. Et on ne peut pas rollbacker des emails envoyés ici
            # c'est un rollback qui rendre le processus métier inconsistant
            # sachant que chaque ligne à son propre état et est indépendante
            # du statut de la déclaration tax shelter dont elle dépend
            self.env.cr.commit()

    @api.multi
    def print_subscription_certificate(self):
        self.ensure_one()
        report, name = REPORT_DIC["subscription"]
        return self.env.ref(report).report_action(self)

    @api.multi
    def print_shares_certificate(self):
        self.ensure_one()
        report, name = REPORT_DIC["shares"]
        return self.env.ref(report).report_action(self)

    @api.multi
    def _compute_amounts(self):
        for certificate in self:
            total_amount_previously_subscribed = 0
            total_amount_previously_eligible = 0
            total_amount_subscribed = 0
            total_amount_elligible = 0
            total_amount_transfered = 0
            total_amount_resold = 0

            for line in certificate.subscribed_lines:
                total_amount_subscribed += line.amount_subscribed
                total_amount_elligible += line.amount_subscribed_eligible
            certificate.total_amount_subscribed = total_amount_subscribed
            certificate.total_amount_eligible = total_amount_elligible

            for line in certificate.previously_subscribed_eligible_lines:
                total_amount_previously_eligible += (
                    line.amount_subscribed_eligible
                )
            certificate.total_amount_eligible_previously_subscribed = (
                total_amount_previously_eligible
            )

            for line in certificate.previously_subscribed_lines:
                total_amount_previously_subscribed += line.amount_subscribed
            certificate.total_amount_previously_subscribed = (
                total_amount_previously_subscribed
            )

            for line in certificate.transfered_lines:
                total_amount_transfered += line.amount_transfered
            certificate.total_amount_transfered = total_amount_transfered

            for line in certificate.resold_lines:
                total_amount_resold += line.amount_resold
            certificate.total_amount_resold = total_amount_resold
            certificate.total_amount = (
                certificate.total_amount_previously_subscribed
                + certificate.total_amount_subscribed
                + certificate.total_amount_resold
                + certificate.total_amount_transfered
            )

    @api.depends("lines")
    def _compute_certificate_lines(self):
        for certificate in self:
            certificate.previously_subscribed_lines = certificate.lines.filtered(
                lambda r: r.type == "subscribed"
                and r.transaction_date < certificate.declaration_id.date_from
            )
            certificate.previously_subscribed_eligible_lines = certificate.lines.filtered(  # noqa
                lambda r: r.type == "subscribed"
                and r.transaction_date < certificate.declaration_id.date_from
                and r.tax_shelter
            )
            certificate.subscribed_lines = certificate.lines.filtered(
                lambda r: r.type == "subscribed"
                and r.transaction_date >= certificate.declaration_id.date_from
                and r.transaction_date <= certificate.declaration_id.date_to
            )
            certificate.resold_lines = certificate.lines.filtered(
                lambda r: r.type == "resold"
                and r.transaction_date >= certificate.declaration_id.date_from
                and r.transaction_date <= certificate.declaration_id.date_to
            )
            certificate.transfered_lines = certificate.lines.filtered(
                lambda r: r.type == "transfered"
                and r.transaction_date >= certificate.declaration_id.date_from
                and r.transaction_date <= certificate.declaration_id.date_to
            )

    @api.model
    def batch_send_tax_shelter_certificate(self):
        certificates = self.search([("state", "=", "validated")], limit=80)
        certificates.send_certificates()


class TaxShelterCertificateLine(models.Model):

    _name = "certificate.line"
    _description = "Tax Shelter Certificate Line"

    declaration_id = fields.Many2one(
        related="tax_shelter_certificate.declaration_id", string="Declaration"
    )
    tax_shelter_certificate = fields.Many2one(
        "tax.shelter.certificate",
        string="Tax shelter certificate",
        ondelete="cascade",
        required=True,
    )
    share_type = fields.Many2one(
        "product.product", string="Share type", required=True, readonly=True
    )
    share_unit_price = fields.Float(
        string="Share price", required=True, readonly=True
    )
    quantity = fields.Integer(
        string="Number of shares", required=True, readonly=True
    )
    transaction_date = fields.Date(string="Transaction date")
    tax_shelter = fields.Boolean(string="Tax shelter eligible", readonly=True)
    type = fields.Selection(
        [
            ("subscribed", "Subscribed"),
            ("resold", "Resold"),
            ("transfered", "Transfered"),
            ("kept", "Kept"),
        ],
        required=True,
        readonly=True,
    )
    amount_subscribed = fields.Float(
        compute="_compute_totals", string="Amount subscribed", store=True
    )
    amount_subscribed_eligible = fields.Float(
        compute="_compute_totals",
        string="Amount subscribed eligible",
        store=True,
    )
    amount_resold = fields.Float(
        compute="_compute_totals", string="Amount resold", store=True
    )
    amount_transfered = fields.Float(
        compute="_compute_totals", string="Amount transfered", store=True
    )
    share_short_name = fields.Char(string="Share type name", readonly=True)
    capital_before_sub = fields.Float(
        string="Capital before subscription", readonly=True
    )
    capital_after_sub = fields.Float(
        string="Capital after subscription", readonly=True
    )
    capital_limit = fields.Float(string="Capital limit", readonly=True)

    @api.multi
    @api.depends("quantity", "share_unit_price")
    def _compute_totals(self):
        for line in self:
            if line.type == "subscribed":
                line.amount_subscribed = line.share_unit_price * line.quantity
            if line.type == "subscribed" and line.tax_shelter:
                if (
                    line.capital_before_sub < line.capital_limit
                    and line.capital_after_sub >= line.capital_limit
                ):
                    line.amount_subscribed_eligible = (
                        line.capital_limit - line.capital_before_sub
                    )
                elif (
                    line.capital_before_sub < line.capital_limit
                    and line.capital_after_sub <= line.capital_limit
                ):
                    line.amount_subscribed_eligible = (
                        line.share_unit_price * line.quantity
                    )
                elif line.capital_before_sub >= line.capital_limit:
                    line.amount_subscribed_eligible = 0
            if line.type == "resold":
                line.amount_resold = line.share_unit_price * -(line.quantity)
            if line.type == "transfered":
                line.amount_transfered = line.share_unit_price * -(
                    line.quantity
                )