# Copyright (C) 2019-Today: GRAP (<http://www.grap.coop/>)
# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

import os
from pygount import SourceAnalysis
from pathlib import Path
import logging

from odoo import api, fields, models
from odoo.tools.safe_eval import safe_eval
from odoo.modules.module import get_module_path

_logger = logging.getLogger(__name__)


class IrModuleModule(models.Model):
    _inherit = 'ir.module.module'

    author_ids = fields.Many2many(
        string='Authors', comodel_name='ir.module.author', readonly=True,
        relation='ir_module_module_author_rel')

    module_type_id = fields.Many2one(
        string='Module Type', comodel_name='ir.module.type', readonly=True)

    python_code_qty = fields.Integer(
        string='Python Code Quantity', readonly=True)

    xml_code_qty = fields.Integer(
        string='XML Code Quantity', readonly=True)

    js_code_qty = fields.Integer(
        string='JS Code Quantity', readonly=True)

    css_code_qty = fields.Integer(
        string='CSS Code Quantity', readonly=True)

    # Overloadable Section
    @api.model
    def _get_analyse_settings(self):
        """Return a dictionnary of data analysed
        Overload this function if you want to analyse other data
        {
            'extension': {
                'data_to_analyse': 'field_name',
            },
        }, [...]
        extension: extension of the file, with the '.'
        data_to_analyse : possible value : code, documentation, empty, string
        field_name: Odoo field name to store the analysis
        """
        return {
            '.py': {
                'code': 'python_code_qty',
            },
            '.xml': {
                'code': 'xml_code_qty',
            },
            '.js': {
                'code': 'js_code_qty',
            },
            '.css': {
                'code': 'css_code_qty',
            },
        }

    @api.model
    def _get_clean_analyse_values(self):
        """List of fields to unset when a module is uninstalled"""
        return {
            'author_ids': [6, 0, []],
            'module_type_id': False,
            'python_code_qty': False,
            'xml_code_qty': 0,
            'js_code_qty': 0,
            'css_code_qty': 0,
        }

    @api.model
    def _get_module_encoding(self, file_ext):
        return 'utf-8'

    # Overload Section
    @api.model
    def update_list(self):
        res = super().update_list()
        if self.env.context.get('analyse_installed_modules', False):
            self.search([('state', '=', 'installed')]).button_analyse_code()
        return res

    @api.multi
    def write(self, vals):
        res = super().write(vals)
        if vals.get('state', False) == 'installed':
            self.button_analyse_code()
        elif vals.get('state', False) == 'uninstalled'\
                and 'module_analysis' not in [x.name for x in self]:
            self.write(self._get_clean_analyse_values())
        return res

    # Public Section
    @api.multi
    def button_analyse_code(self):
        IrModuleAuthor = self.env['ir.module.author']
        IrModuleTypeRule = self.env['ir.module.type.rule']
        rules = IrModuleTypeRule.search([])

        cfg = self.env['ir.config_parameter']
        val = cfg.get_param('module_analysis.exclude_directories', '')
        exclude_directories = [x.strip() for x in val.split(',') if x.strip()]
        val = cfg.get_param('module_analysis.exclude_files', '')
        exclude_files = [x.strip() for x in val.split(',') if x.strip()]

        for module in self:
            _logger.info("Analysing Code for module %s ..." % (module.name))

            # Update Authors, based on manifest key
            authors = []
            if module.author and module.author[0] == '[':
                author_txt_list = safe_eval(module.author)
            else:
                author_txt_list = module.author.split(',')

            author_txt_list = [x.strip() for x in author_txt_list]
            author_txt_list = [x for x in author_txt_list if x]
            for author_txt in author_txt_list:
                authors.append(IrModuleAuthor._get_or_create(author_txt))

            author_ids = [x.id for x in authors]
            module.author_ids = author_ids

            # Update Module Type, based on rules
            module_type_id = rules._get_module_type_id_from_module(module)
            module.module_type_id = module_type_id

            # Get Path of module folder and parse the code
            module_path = get_module_path(module.name)

            # Get Files
            analysed_datas = self._get_analyse_data_dict()
            file_extensions = analysed_datas.keys()
            file_list = self._get_files_to_analyse(
                module_path, file_extensions, exclude_directories,
                exclude_files)

            for file_path, file_ext in file_list:
                file_res = SourceAnalysis.from_file(
                    file_path, "",
                    encoding=self._get_module_encoding(file_ext))
                for k, v in analysed_datas.get(file_ext).items():
                    v['value'] += getattr(file_res, k)

            # Update the module with the datas
            values = {}
            for file_ext, analyses in analysed_datas.items():
                for k, v in analyses.items():
                    values[v['field']] = v['value']
            module.write(values)

    # Custom Section
    @api.model
    def _get_files_to_analyse(
            self, path, file_extensions, exclude_directories, exclude_files):
        res = []
        for root, dirs, files in os.walk(path, followlinks=True):
            if set(Path(root).parts) & set(exclude_directories):
                continue
            for name in files:
                if name in exclude_files:
                    continue
                filename, file_extension = os.path.splitext(name)
                if file_extension in file_extensions:
                    res.append((os.path.join(root, name), file_extension))
        return res

    @api.model
    def _get_analyse_data_dict(self):
        res_dict = self._get_analyse_settings().copy()
        for file_ext, analyse_dict in res_dict.items():
            for analyse_type, v in analyse_dict.items():
                analyse_dict[analyse_type] = {
                    'field': v,
                    'value': 0
                }
        return res_dict