# -*- coding: utf-8 -*-

from odoo import models, fields, api


class StockMoveLine(models.Model):
    _inherit = 'stock.move.line'

    def _create_check(self):
        """
        Override to prevent creating duplicate quality checks when move lines are recreated.
        For receipt operations with existing completed quality checks, relink them instead.
        """
        # Check each move line
        move_lines_to_process = self.env['stock.move.line']
        
        for ml in self:
            if ml._is_receipt_operation() and ml.picking_id:
                # Search for existing quality checks (including orphaned ones)
                existing_checks = self.env['quality.check'].search([
                    ('picking_id', '=', ml.picking_id.id),
                    ('product_id', '=', ml.product_id.id),
                    ('quality_state', '!=', 'none'),
                    '|',
                    ('move_line_id', '=', False),
                    ('move_line_id', '=', ml.id)
                ])
                
                # If there are completed quality checks, relink them instead of creating new ones
                if existing_checks:
                    # Relink to this move line
                    existing_checks.write({'move_line_id': ml.id})
                    # Skip creating new checks for this move line
                    continue
            
            # Add to list for standard processing
            move_lines_to_process |= ml
        
        # Call parent method only for move lines that need new checks
        if move_lines_to_process:
            return super(StockMoveLine, move_lines_to_process)._create_check()
        
        return self.env['quality.check']

    def write(self, vals):
        """
        Override write method to detect lot_id and lot_name changes.
        When a lot number is assigned or changed on a receipt operation,
        update related quality checks with the new lot number.
        """
        # Call parent write first to ensure the changes are saved
        result = super(StockMoveLine, self).write(vals)
        
        # Check if lot_id or lot_name was changed
        if 'lot_id' in vals or 'lot_name' in vals:
            # Process each move line that was updated
            for move_line in self:
                # Check if this is a receipt operation
                if move_line._is_receipt_operation():
                    # Get the lot_id to propagate to quality checks
                    lot_id = move_line.lot_id.id if move_line.lot_id else False
                    # Update related quality checks
                    move_line._update_quality_check_lot(lot_id)
        
        return result

    def _is_receipt_operation(self):
        """
        Check if the current move line is part of a receipt operation.
        Receipt operations are identified by picking_type_code == 'incoming'.
        
        This method implements robust operation type identification with multiple
        fallback paths to ensure reliable detection across different scenarios.
        
        Returns:
            bool: True if this is a receipt operation, False otherwise
        """
        self.ensure_one()
        
        # Primary check: picking_type_code through the picking
        if self.picking_id and self.picking_id.picking_type_id:
            return self.picking_id.picking_type_id.code == 'incoming'
        
        # Fallback 1: check through move_id.picking_type_id
        if self.move_id and self.move_id.picking_type_id:
            return self.move_id.picking_type_id.code == 'incoming'
        
        # Fallback 2: check through move_id.picking_id (in case picking_type_id is not directly on move)
        if self.move_id and self.move_id.picking_id and self.move_id.picking_id.picking_type_id:
            return self.move_id.picking_id.picking_type_id.code == 'incoming'
        
        # Default: not a receipt operation if we can't determine the type
        return False

    def _update_quality_check_lot(self, lot_id):
        """
        Update related quality checks with the new lot number.
        This method searches for quality checks linked to this move line
        and updates their lot_id field without triggering state reset.
        
        Also handles orphaned quality checks (where move_line_id was cleared).
        
        Args:
            lot_id: The ID of the lot to assign to quality checks (or False)
        """
        self.ensure_one()
        
        QualityCheck = self.env['quality.check']
        
        # Search for quality checks related to this move line
        quality_checks = QualityCheck.search([
            ('move_line_id', '=', self.id)
        ])
        
        # Also search for orphaned quality checks from the same picking
        # that might have been unlinked from their move_line
        if self.picking_id:
            orphaned_checks = QualityCheck.search([
                ('picking_id', '=', self.picking_id.id),
                ('move_line_id', '=', False),
                ('product_id', '=', self.product_id.id),
                ('quality_state', '!=', 'none')
            ])
            
            # Relink orphaned checks to this move line
            if orphaned_checks:
                orphaned_checks.write({'move_line_id': self.id})
                quality_checks |= orphaned_checks
        
        # Filter to ensure we only update quality checks for receipt operations
        receipt_quality_checks = quality_checks.filtered(
            lambda qc: qc._is_receipt_operation()
        )
        
        # Update the lot_id on each quality check without triggering state reset
        for quality_check in receipt_quality_checks:
            # Use the quality check's own method to update lot without state reset
            quality_check._update_lot_from_move_line_manual(lot_id)