<?php

namespace App\Services\Import\Handlers;

use App\Models\Activity;
use App\Models\Import;
use App\Services\Import\DateNormalizer;
use App\Services\Import\BaseEntityHandler;

class ActivityHandler extends BaseEntityHandler
{
    public function getEntityClass(): string
    {
        return Activity::class;
    }

    /**
     * Override validate to skip validation if note is empty.
     * Handles both single values and arrays.
     */
    public function validate(array $mapped): array
    {
        $note = $mapped['note'] ?? null;
        
        // If array, check if all values are empty
        if (is_array($note)) {
            $hasValue = false;
            foreach ($note as $n) {
                if (!empty($n) && trim((string)$n) !== '') {
                    $hasValue = true;
                    break;
                }
            }
            if (!$hasValue) {
                return ['valid' => true, 'errors' => []];
            }
            // Skip parent validation for arrays - we'll validate in process()
            return ['valid' => true, 'errors' => []];
        }
        
        // Single value - check if empty
        if (empty($note) || trim((string)$note) === '') {
            return ['valid' => true, 'errors' => []];
        }

        return parent::validate($mapped);
    }

    public function resolve(array $mapped, array $context = []): mixed
    {
        // Activities typically don't have a unique reference for deduplication
        // Override this method if you have specific deduplication logic
        return null;
    }

    public function process(Import $import, array $mapped, array $raw, array $context = []): array
    {
        // Handle multiple activities if note is an array
        $notes = $mapped['note'] ?? null;
        
        // If single value, convert to array for uniform processing
        if (!is_array($notes)) {
            $notes = [$notes];
        }
        
        $results = [];
        $insertedCount = 0;
        $skippedCount = 0;
        
        // Get context IDs once
        $clientCaseId = $mapped['client_case_id'] ?? $context['contract']['entity']?->client_case_id ?? null;
        $contractId = $mapped['contract_id'] ?? $context['contract']['entity']?->id ?? null;
        
        foreach ($notes as $note) {
            // Skip if note is empty
            if (empty($note) || trim((string)$note) === '') {
                $skippedCount++;
                continue;
            }

            // Require at least client_case_id or contract_id based on options
            $requireCase = $this->getOption('require_client_case', false);
            $requireContract = $this->getOption('require_contract', false);

            if ($requireCase && ! $clientCaseId) {
                $skippedCount++;
                continue;
            }

            if ($requireContract && ! $contractId) {
                $skippedCount++;
                continue;
            }

            // Build activity payload for this note
            $payload = ['note' => $note];
            $payload['client_case_id'] = $clientCaseId;
            $payload['contract_id'] = $contractId;

            // Set action_id and decision_id from template meta if not in mapped data
            if (!isset($mapped['action_id'])) {
                $payload['action_id'] = $import->template->meta['activity_action_id'] ?? $this->getDefaultActionId();
            } else {
                $payload['action_id'] = $mapped['action_id'];
            }
            
            if (!isset($mapped['decision_id']) && isset($import->template->meta['activity_decision_id'])) {
                $payload['decision_id'] = $import->template->meta['activity_decision_id'];
            }

            // Create activity
            $activity = new \App\Models\Activity;
            $activity->fill($payload);
            $activity->save();
            
            $results[] = $activity;
            $insertedCount++;
        }
        
        if ($insertedCount === 0 && $skippedCount > 0) {
            return [
                'action' => 'skipped',
                'message' => 'All activities empty or missing requirements',
            ];
        }
        
        return [
            'action' => 'inserted',
            'entity' => $results[0] ?? null,
            'entities' => $results,
            'applied_fields' => ['note', 'client_case_id', 'contract_id', 'action_id'],
            'count' => $insertedCount,
        ];
    }

    protected function buildPayload(array $mapped, $model): array
    {
        $payload = [];

        // Map activity fields
        if (isset($mapped['due_date'])) {
            $payload['due_date'] = DateNormalizer::toDate((string) $mapped['due_date']);
        }

        if (isset($mapped['amount'])) {
            $payload['amount'] = is_string($mapped['amount']) ? (float) str_replace(',', '.', $mapped['amount']) : (float) $mapped['amount'];
        }

        if (isset($mapped['note'])) {
            $payload['note'] = $mapped['note'];
        }

        if (isset($mapped['action_id'])) {
            $payload['action_id'] = (int) $mapped['action_id'];
        }

        if (isset($mapped['decision_id'])) {
            $payload['decision_id'] = (int) $mapped['decision_id'];
        }

        return $payload;
    }

    /**
     * Get default action ID (use minimum ID from actions table).
     */
    private function getDefaultActionId(): int
    {
        return (int) (\App\Models\Action::min('id') ?? 1);
    }
}