# © 2016 Julien Coux (Camptocamp)
# Copyright 2020 ForgeFlow S.L. (https://www.forgeflow.com)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

import operator
from datetime import date, datetime

from flectra import api, models
from flectra.tools import float_is_zero


class OpenItemsReport(models.AbstractModel):
    _name = "report.account_financial_report.open_items"
    _description = "Open Items Report"

    @api.model
    def get_html(self, given_context=None):
        return self._get_html()

    def _get_html(self):
        result = {}
        rcontext = {}
        context = dict(self.env.context)
        rcontext.update(context.get("data"))
        active_id = context.get("active_id")
        wiz = self.env["open.items.report.wizard"].browse(active_id)
        rcontext["o"] = wiz
        result["html"] = self.env.ref(
            "account_financial_report.report_open_items"
        ).render(rcontext)
        return result

    def _get_account_partial_reconciled(self, company_id, date_at_object):
        domain = [("max_date", ">", date_at_object), ("company_id", "=", company_id)]
        fields = ["debit_move_id", "credit_move_id", "amount"]
        accounts_partial_reconcile = self.env["account.partial.reconcile"].search_read(
            domain=domain, fields=fields
        )
        debit_amount = {}
        credit_amount = {}
        for account_partial_reconcile_data in accounts_partial_reconcile:
            debit_move_id = account_partial_reconcile_data["debit_move_id"][0]
            credit_move_id = account_partial_reconcile_data["credit_move_id"][0]
            if debit_move_id not in debit_amount.keys():
                debit_amount[debit_move_id] = 0.0
            debit_amount[debit_move_id] += account_partial_reconcile_data["amount"]
            if credit_move_id not in credit_amount.keys():
                credit_amount[credit_move_id] = 0.0
            credit_amount[credit_move_id] += account_partial_reconcile_data["amount"]
            account_partial_reconcile_data.update(
                {"debit_move_id": debit_move_id, "credit_move_id": credit_move_id}
            )
        return accounts_partial_reconcile, debit_amount, credit_amount

    @api.model
    def _get_new_move_lines_domain(
        self, new_ml_ids, account_ids, company_id, partner_ids, target_moves
    ):
        domain = [
            ("account_id", "in", account_ids),
            ("company_id", "=", company_id),
            ("id", "in", new_ml_ids),
        ]
        if partner_ids:
            domain += [("partner_id", "in", partner_ids)]
        if target_moves == "posted":
            domain += [("move_id.state", "=", "posted")]
        return domain

    def _recalculate_move_lines(
        self,
        move_lines,
        debit_ids,
        credit_ids,
        debit_amount,
        credit_amount,
        ml_ids,
        account_ids,
        company_id,
        partner_ids,
        target_moves,
    ):
        debit_ids = set(debit_ids)
        credit_ids = set(credit_ids)
        in_credit_but_not_in_debit = credit_ids - debit_ids
        reconciled_ids = list(debit_ids) + list(in_credit_but_not_in_debit)
        reconciled_ids = set(reconciled_ids)
        ml_ids = set(ml_ids)
        new_ml_ids = reconciled_ids - ml_ids
        new_ml_ids = list(new_ml_ids)
        new_domain = self._get_new_move_lines_domain(
            new_ml_ids, account_ids, company_id, partner_ids, target_moves
        )
        ml_fields = [
            "id",
            "name",
            "date",
            "move_id",
            "journal_id",
            "account_id",
            "partner_id",
            "amount_residual",
            "date_maturity",
            "ref",
            "debit",
            "credit",
            "reconciled",
            "currency_id",
            "amount_currency",
            "amount_residual_currency",
        ]
        new_move_lines = self.env["account.move.line"].search_read(
            domain=new_domain, fields=ml_fields
        )
        move_lines = move_lines + new_move_lines
        for move_line in move_lines:
            ml_id = move_line["id"]
            if ml_id in debit_ids:
                move_line["amount_residual"] += debit_amount[ml_id]
            if ml_id in credit_ids:
                move_line["amount_residual"] -= credit_amount[ml_id]
        return move_lines

    @api.model
    def _get_move_lines_domain(
        self, company_id, account_ids, partner_ids, target_move, date_from
    ):
        domain = [
            ("account_id", "in", account_ids),
            ("company_id", "=", company_id),
            ("reconciled", "=", False),
        ]
        if partner_ids:
            domain += [("partner_id", "in", partner_ids)]
        if target_move == "posted":
            domain += [("move_id.state", "=", "posted")]
        if date_from:
            domain += [("date", ">", date_from)]
        return domain

    def _get_accounts_data(self, accounts_ids):
        accounts = self.env["account.account"].browse(accounts_ids)
        accounts_data = {}
        for account in accounts:
            accounts_data.update(
                {
                    account.id: {
                        "id": account.id,
                        "code": account.code,
                        "name": account.name,
                        "hide_account": False,
                        "currency_id": account.currency_id or False,
                        "currency_name": account.currency_id.name,
                    }
                }
            )
        return accounts_data

    def _get_journals_data(self, journals_ids):
        journals = self.env["account.journal"].browse(journals_ids)
        journals_data = {}
        for journal in journals:
            journals_data.update({journal.id: {"id": journal.id, "code": journal.code}})
        return journals_data

    def _get_data(
        self,
        account_ids,
        partner_ids,
        date_at_object,
        target_move,
        company_id,
        date_from,
    ):
        domain = self._get_move_lines_domain(
            company_id, account_ids, partner_ids, target_move, date_from
        )
        ml_fields = [
            "id",
            "name",
            "date",
            "move_id",
            "journal_id",
            "account_id",
            "partner_id",
            "amount_residual",
            "date_maturity",
            "ref",
            "debit",
            "credit",
            "reconciled",
            "currency_id",
            "amount_currency",
            "amount_residual_currency",
        ]
        move_lines = self.env["account.move.line"].search_read(
            domain=domain, fields=ml_fields
        )
        journals_ids = set()
        partners_ids = set()
        partners_data = {}
        if date_at_object < date.today():
            (
                acc_partial_rec,
                debit_amount,
                credit_amount,
            ) = self._get_account_partial_reconciled(company_id, date_at_object)
            if acc_partial_rec:
                ml_ids = list(map(operator.itemgetter("id"), move_lines))
                debit_ids = list(
                    map(operator.itemgetter("debit_move_id"), acc_partial_rec)
                )
                credit_ids = list(
                    map(operator.itemgetter("credit_move_id"), acc_partial_rec)
                )
                move_lines = self._recalculate_move_lines(
                    move_lines,
                    debit_ids,
                    credit_ids,
                    debit_amount,
                    credit_amount,
                    ml_ids,
                    account_ids,
                    company_id,
                    partner_ids,
                    target_move,
                )
        move_lines = [
            move_line
            for move_line in move_lines
            if move_line["date"] <= date_at_object
            and not float_is_zero(move_line["amount_residual"], precision_digits=2)
        ]

        open_items_move_lines_data = {}
        for move_line in move_lines:
            journals_ids.add(move_line["journal_id"][0])
            acc_id = move_line["account_id"][0]
            # Partners data
            if move_line["partner_id"]:
                prt_id = move_line["partner_id"][0]
                prt_name = move_line["partner_id"][1]
            else:
                prt_id = 0
                prt_name = "Missing Partner"
            if prt_id not in partners_ids:
                partners_data.update({prt_id: {"id": prt_id, "name": prt_name}})
                partners_ids.add(prt_id)

            # Move line update
            original = 0

            if not float_is_zero(move_line["credit"], precision_digits=2):
                original = move_line["credit"] * (-1)
            if not float_is_zero(move_line["debit"], precision_digits=2):
                original = move_line["debit"]

            if move_line["ref"] == move_line["name"]:
                if move_line["ref"]:
                    ref_label = move_line["ref"]
                else:
                    ref_label = ""
            elif not move_line["ref"]:
                ref_label = move_line["name"]
            elif not move_line["name"]:
                ref_label = move_line["ref"]
            else:
                ref_label = move_line["ref"] + str(" - ") + move_line["name"]

            move_line.update(
                {
                    "date": move_line["date"],
                    "date_maturity": move_line["date_maturity"]
                    and move_line["date_maturity"].strftime("%d/%m/%Y"),
                    "original": original,
                    "partner_id": prt_id,
                    "partner_name": prt_name,
                    "ref_label": ref_label,
                    "journal_id": move_line["journal_id"][0],
                    "move_name": move_line["move_id"][1],
                    "currency_id": move_line["currency_id"][0]
                    if move_line["currency_id"]
                    else False,
                    "currency_name": move_line["currency_id"][1]
                    if move_line["currency_id"]
                    else False,
                }
            )

            # Open Items Move Lines Data
            if acc_id not in open_items_move_lines_data.keys():
                open_items_move_lines_data[acc_id] = {prt_id: [move_line]}
            else:
                if prt_id not in open_items_move_lines_data[acc_id].keys():
                    open_items_move_lines_data[acc_id][prt_id] = [move_line]
                else:
                    open_items_move_lines_data[acc_id][prt_id].append(move_line)
        journals_data = self._get_journals_data(list(journals_ids))
        accounts_data = self._get_accounts_data(open_items_move_lines_data.keys())
        return (
            move_lines,
            partners_data,
            journals_data,
            accounts_data,
            open_items_move_lines_data,
        )

    @api.model
    def _calculate_amounts(self, open_items_move_lines_data):
        total_amount = {}
        for account_id in open_items_move_lines_data.keys():
            total_amount[account_id] = {}
            total_amount[account_id]["residual"] = 0.0
            for partner_id in open_items_move_lines_data[account_id].keys():
                total_amount[account_id][partner_id] = {}
                total_amount[account_id][partner_id]["residual"] = 0.0
                for move_line in open_items_move_lines_data[account_id][partner_id]:
                    total_amount[account_id][partner_id]["residual"] += move_line[
                        "amount_residual"
                    ]
                    total_amount[account_id]["residual"] += move_line["amount_residual"]
        return total_amount

    @api.model
    def _order_open_items_by_date(
        self, open_items_move_lines_data, show_partner_details
    ):
        new_open_items = {}
        if not show_partner_details:
            for acc_id in open_items_move_lines_data.keys():
                new_open_items[acc_id] = {}
                move_lines = []
                for prt_id in open_items_move_lines_data[acc_id]:
                    for move_line in open_items_move_lines_data[acc_id][prt_id]:
                        move_lines += [move_line]
                move_lines = sorted(move_lines, key=lambda k: (k["date"]))
                new_open_items[acc_id] = move_lines
        else:
            for acc_id in open_items_move_lines_data.keys():
                new_open_items[acc_id] = {}
                for prt_id in open_items_move_lines_data[acc_id]:
                    new_open_items[acc_id][prt_id] = {}
                    move_lines = []
                    for move_line in open_items_move_lines_data[acc_id][prt_id]:
                        move_lines += [move_line]
                    move_lines = sorted(move_lines, key=lambda k: (k["date"]))
                    new_open_items[acc_id][prt_id] = move_lines
        return new_open_items

    def _get_report_values(self, docids, data):
        wizard_id = data["wizard_id"]
        company = self.env["res.company"].browse(data["company_id"])
        company_id = data["company_id"]
        account_ids = data["account_ids"]
        partner_ids = data["partner_ids"]
        date_at = data["date_at"]
        date_at_object = datetime.strptime(date_at, "%Y-%m-%d").date()
        date_from = data["date_from"]
        target_move = data["target_move"]
        show_partner_details = data["show_partner_details"]

        (
            move_lines_data,
            partners_data,
            journals_data,
            accounts_data,
            open_items_move_lines_data,
        ) = self._get_data(
            account_ids, partner_ids, date_at_object, target_move, company_id, date_from
        )

        total_amount = self._calculate_amounts(open_items_move_lines_data)
        open_items_move_lines_data = self._order_open_items_by_date(
            open_items_move_lines_data, show_partner_details
        )
        return {
            "doc_ids": [wizard_id],
            "doc_model": "open.items.report.wizard",
            "docs": self.env["open.items.report.wizard"].browse(wizard_id),
            "foreign_currency": data["foreign_currency"],
            "show_partner_details": data["show_partner_details"],
            "company_name": company.display_name,
            "currency_name": company.currency_id.name,
            "date_at": date_at_object.strftime("%d/%m/%Y"),
            "hide_account_at_0": data["hide_account_at_0"],
            "target_move": data["target_move"],
            "journals_data": journals_data,
            "partners_data": partners_data,
            "accounts_data": accounts_data,
            "total_amount": total_amount,
            "Open_Items": open_items_move_lines_data,
        }