# -*- coding: utf-8 -*-
# Copyright 2024-2025 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)
# Part of the Fusion Claim Assistant product family.

import base64
import csv
import json
import re
import io
from odoo import models, fields, api, _
from odoo.exceptions import UserError
import logging

_logger = logging.getLogger(__name__)


class DeviceCodeImportWizard(models.TransientModel):
    _name = 'fusion_claims.device.import.wizard'
    _description = 'Import ADP Device Codes from JSON/CSV'

    file = fields.Binary(
        string='File',
        required=True,
        help='Upload a JSON or CSV file containing device codes',
    )
    filename = fields.Char(string='Filename')
    file_type = fields.Selection([
        ('json', 'JSON'),
        ('csv', 'CSV (ADP Mobility Manual)'),
    ], string='File Type', default='json', required=True)
    
    # Results
    state = fields.Selection([
        ('draft', 'Draft'),
        ('done', 'Done'),
    ], default='draft')
    
    result_created = fields.Integer(string='Created', readonly=True)
    result_updated = fields.Integer(string='Updated', readonly=True)
    result_errors = fields.Text(string='Errors', readonly=True)

    @api.onchange('filename')
    def _onchange_filename(self):
        """Auto-detect file type from filename."""
        if self.filename:
            if self.filename.lower().endswith('.csv'):
                self.file_type = 'csv'
            elif self.filename.lower().endswith('.json'):
                self.file_type = 'json'

    def _parse_csv_content(self, content):
        """Parse CSV content to data list."""
        data = []
        
        # Try to decode as UTF-8 with BOM, then fallback
        try:
            text = content.decode('utf-8-sig')
        except UnicodeDecodeError:
            try:
                text = content.decode('latin-1')
            except Exception:
                text = content.decode('utf-8', errors='ignore')
        
        reader = csv.DictReader(io.StringIO(text))
        
        # Log the column names for debugging
        _logger.info("CSV columns detected: %s", reader.fieldnames)
        
        for row in reader:
            device_code = (row.get('Device Code', '') or '').strip()
            if not device_code:
                continue
            
            # Find the price column - check multiple possible names
            price = 0.0
            price_column_names = [
                'ADP Price', 'adp_price', 'Approved Price', ' Approved Price ',
                'Price', 'price', 'ADP_Price', 'adp price'
            ]
            # First try exact matches
            for col_name in price_column_names:
                if col_name in row:
                    price_str = row.get(col_name, '')
                    price_str = re.sub(r'[\$,"\'\s]', '', str(price_str))
                    try:
                        price = float(price_str)
                        if price > 0:
                            break
                    except ValueError:
                        pass
            
            # If still 0, try partial match on column names
            if price == 0:
                for key in row.keys():
                    key_lower = key.lower().strip()
                    if 'price' in key_lower:
                        price_str = row.get(key, '')
                        price_str = re.sub(r'[\$,"\'\s]', '', str(price_str))
                        try:
                            price = float(price_str)
                            if price > 0:
                                _logger.info("Found price in column '%s': %s", key, price)
                                break
                        except ValueError:
                            pass
            
            # Find the serial/SN required column - check multiple possible names
            sn_required = 'No'
            sn_column_names = [
                'SN Required', 'sn_required', 'Serial', 'serial', 
                'SN', 'sn', 'Serial Number Required', 'Requires SN'
            ]
            # First try exact matches
            for col_name in sn_column_names:
                if col_name in row:
                    sn_required = row.get(col_name, 'No')
                    break
            
            # If not found, try partial match
            if sn_required == 'No':
                for key in row.keys():
                    key_lower = key.lower().strip()
                    if 'serial' in key_lower or 'sn' in key_lower:
                        sn_required = row.get(key, 'No')
                        _logger.info("Found SN in column '%s': %s", key, sn_required)
                        break
            
            data.append({
                'Device Type': row.get('Device Type', ''),
                'Manufacturer': row.get('Manufacturer', ''),
                'Device Description': row.get('Device Description', ''),
                'Device Code': device_code,
                'Quantity': row.get('Qty', 1) or row.get('Quantity', 1),
                'ADP Price': price,
                'SN Required': sn_required,
            })
        
        _logger.info("Parsed %d device codes from CSV", len(data))
        return data

    def action_import(self):
        """Import device codes from uploaded file."""
        self.ensure_one()
        
        if not self.file:
            raise UserError(_("Please upload a file."))
        
        try:
            # Decode file
            file_content = base64.b64decode(self.file)
            
            if self.file_type == 'csv':
                # Parse CSV
                data = self._parse_csv_content(file_content)
            else:
                # Parse JSON
                try:
                    text = file_content.decode('utf-8-sig')
                except UnicodeDecodeError:
                    text = file_content.decode('utf-8')
                data = json.loads(text)
            
        except json.JSONDecodeError as e:
            raise UserError(_("Invalid JSON file: %s") % str(e))
        except Exception as e:
            raise UserError(_("Error reading file: %s") % str(e))
        
        if not data:
            raise UserError(_("No valid data found in file."))
        
        # Import using the model method
        DeviceCode = self.env['fusion.adp.device.code']
        result = DeviceCode.import_from_json(data)
        
        # Update wizard with results
        self.write({
            'state': 'done',
            'result_created': result['created'],
            'result_updated': result['updated'],
            'result_errors': '\n'.join(result['errors']) if result['errors'] else '',
        })
        
        return {
            'type': 'ir.actions.act_window',
            'res_model': self._name,
            'res_id': self.id,
            'view_mode': 'form',
            'target': 'new',
        }