from odoo import models, fields, api


class SurveyDashboardView(models.Model):
    _name = 'survey.dashboard.view'
    _description = 'Survey Dashboard View'
    _auto = False
    _order = 'create_date desc'
    _rec_name = 'question_id'

    survey_id = fields.Many2one('survey.survey', string='Survey', readonly=True)
    user_input_id = fields.Many2one('survey.user_input', string='User Input', readonly=True)
    partner_id = fields.Many2one('res.partner', string='Respondent', readonly=True)
    question_id = fields.Many2one('survey.question', string='Question', readonly=True)

    answer_type = fields.Selection([
        ('simple_choice', 'Multiple choice: only one answer'),
        ('multiple_choice', 'Multiple choice: multiple answers allowed'),
        ('text_box', 'Multiple Lines Text Box'),
        ('char_box', 'Single Line Text Box'),
        ('numerical_box', 'Numerical Value'),
        ('scale', 'Scale'),
        ('date', 'Date'),
        ('datetime', 'Datetime'),
        ('matrix', 'Matrix')
    ], string='Question Type', readonly=True)

    answer_value = fields.Char(string='Answer Value', readonly=True)
    response_count = fields.Integer(string='Count', readonly=True)
    create_date = fields.Datetime(string='Response Date', readonly=True)
    is_done = fields.Boolean(string='Completed', readonly=True)

    def init(self):
        # Drop view first to allow structural changes
        self.env.cr.execute("DROP VIEW IF EXISTS survey_dashboard_view")

        self.env.cr.execute("""
            CREATE VIEW survey_dashboard_view AS (
                SELECT 
                    ROW_NUMBER() OVER () as id,
                    sui.id as user_input_id,
                    sui.survey_id as survey_id,
                    sui.partner_id as partner_id,
                    sq.id as question_id,
                    sq.question_type as answer_type,

                    -- ✅ FIX: Explicitly cast ALL branches to TEXT
                    CASE
                        WHEN sq.question_type = 'matrix' THEN
                            CONCAT(sqa_row.value::text, ': ', sqa_col.value::text)

                        WHEN sq.question_type IN ('simple_choice', 'multiple_choice') THEN
                            sqa_col.value::text

                        ELSE COALESCE(
                            uls.value_text_box::text,
                            uls.value_char_box::text,
                            uls.value_date::text,
                            uls.value_datetime::text,
                            uls.value_numerical_box::text,
                            uls.value_scale::text,
                            ''
                        )
                    END as answer_value,

                    1 as response_count,
                    sui.create_date as create_date,
                    (sui.state = 'done') as is_done
                FROM survey_user_input sui
                LEFT JOIN survey_user_input_line uls ON uls.user_input_id = sui.id
                LEFT JOIN survey_question sq ON sq.id = uls.question_id

                -- Joins for Multiple Choice and Matrix answers
                LEFT JOIN survey_question_answer sqa_col ON uls.suggested_answer_id = sqa_col.id
                LEFT JOIN survey_question_answer sqa_row ON uls.matrix_row_id = sqa_row.id

                WHERE sui.state IN ('done')
                    AND sq.is_page = False 
                    AND sq.question_type IS NOT NULL
            )
        """)