<?php

namespace App\Controllers\Admin;

use App\Controllers\Controller;
use App\Core\Request;
use App\Core\Response;
use App\Services\Database\Connection;
use PDO;
use Throwable;

class OrganizationsController extends Controller
{
    private PDO $pdo;

    public function __construct(Connection $connection)
    {
        parent::__construct();
        $this->pdo = $connection->getPdo();
    }

    /**
     * List all organizations with filters.
     */
    public function index(Request $request, Response $response): string
    {
        $type = $request->get('type', '');
        $search = $request->get('search', '');
        $page = max(1, (int)$request->get('page', 1));
        $perPage = 20;
        $offset = ($page - 1) * $perPage;

        $where = ['o.deleted_at IS NULL'];
        $params = [];

        if ($type) {
            $where[] = 'o.type = ?';
            $params[] = $type;
        }
        if ($search) {
            $where[] = '(o.name LIKE ? OR o.domain LIKE ? OR o.description LIKE ?)';
            $params[] = "%{$search}%";
            $params[] = "%{$search}%";
            $params[] = "%{$search}%";
        }

        $whereClause = implode(' AND ', $where);

        // Count total
        $stmt = $this->pdo->prepare("SELECT COUNT(*) FROM organizations o WHERE {$whereClause}");
        $stmt->execute($params);
        $total = (int)$stmt->fetchColumn();

        // Fetch page
        $stmt = $this->pdo->prepare(
            "SELECT o.*, 
                    (SELECT COUNT(*) FROM opportunities WHERE organization_id = o.id AND deleted_at IS NULL) as opportunities_count 
             FROM organizations o 
             WHERE {$whereClause} 
             ORDER BY o.updated_at DESC 
             LIMIT ? OFFSET ?"
        );
        $stmt->execute(array_merge($params, [$perPage, $offset]));
        $organizations = $stmt->fetchAll();

        return $this->render('admin/organizations/index', [
            'organizations' => $organizations,
            'total' => $total,
            'page' => $page,
            'perPage' => $perPage,
            'type' => $type,
            'search' => $search,
            'types' => ['vc', 'angel', 'accelerator', 'incubator', 'venture_studio', 'partner'],
            'statuses' => ['New', 'Researching', 'Contacted', 'Follow Up', 'Meeting Scheduled', 'Interested', 'Rejected', 'Invested'],
        ], 'admin');
    }

    /**
     * Show single organization.
     */
    public function show(Request $request, Response $response, int $id): string
    {
        $stmt = $this->pdo->prepare("SELECT * FROM organizations WHERE id = ? AND deleted_at IS NULL");
        $stmt->execute([$id]);
        $org = $stmt->fetch();

        if (!$org) {
            $response->redirect('/admin/organizations');
            return '';
        }

        // Get opportunities for this org
        $stmt = $this->pdo->prepare(
            "SELECT o.*, GROUP_CONCAT(t.name) as tag_names
             FROM opportunities o
             LEFT JOIN opportunity_tags ot ON ot.opportunity_id = o.id
             LEFT JOIN tags t ON t.id = ot.tag_id
             WHERE o.organization_id = ? AND o.deleted_at IS NULL
             GROUP BY o.id
             ORDER BY o.score DESC"
        );
        $stmt->execute([$id]);
        $opportunities = $stmt->fetchAll();

        // Get contacts for this org
        $stmt = $this->pdo->prepare(
            "SELECT c.*, 
                    (SELECT COUNT(*) FROM interactions WHERE contact_id = c.id) as interaction_count
             FROM contacts c 
             WHERE c.organization_id = ? AND c.deleted_at IS NULL 
             ORDER BY c.created_at DESC"
        );
        $stmt->execute([$id]);
        $contacts = $stmt->fetchAll();

        // Get activity logs
        $stmt = $this->pdo->prepare(
            "SELECT * FROM activity_logs WHERE description LIKE ? ORDER BY created_at DESC LIMIT 20"
        );
        $stmt->execute(['%' . $org['name'] . '%']);
        $activities = $stmt->fetchAll();

        return $this->render('admin/organizations/show', [
            'org' => $org,
            'opportunities' => $opportunities,
            'contacts' => $contacts,
            'activities' => $activities,
        ], 'admin');
    }

    /**
     * Show create/edit form.
     */
    public function create(Request $request, Response $response): string
    {
        return $this->render('admin/organizations/form', [
            'org' => null,
            'types' => ['vc', 'angel', 'accelerator', 'incubator', 'venture_studio', 'partner'],
            'statuses' => ['New', 'Researching', 'Contacted', 'Follow Up', 'Meeting Scheduled', 'Interested', 'Rejected', 'Invested'],
        ], 'admin');
    }

    /**
     * Show edit form.
     */
    public function edit(Request $request, Response $response, int $id): string
    {
        $stmt = $this->pdo->prepare("SELECT * FROM organizations WHERE id = ? AND deleted_at IS NULL");
        $stmt->execute([$id]);
        $org = $stmt->fetch();

        if (!$org) {
            $response->redirect('/admin/organizations');
            return '';
        }

        return $this->render('admin/organizations/form', [
            'org' => $org,
            'types' => ['vc', 'angel', 'accelerator', 'incubator', 'venture_studio', 'partner'],
            'statuses' => ['New', 'Researching', 'Contacted', 'Follow Up', 'Meeting Scheduled', 'Interested', 'Rejected', 'Invested'],
        ], 'admin');
    }

    /**
     * Save organization (create or update).
     */
    public function store(Request $request, Response $response): void
    {
        $id = $request->post('id', '');
        $name = $request->post('name', '');
        $domain = $request->post('domain', '');
        $type = $request->post('type', 'partner');
        $country = $request->post('country', '');
        $city = $request->post('city', '');
        $websiteUrl = $request->post('website_url', '');
        $description = $request->post('description', '');
        $crmStatus = $request->post('crm_status', 'New');
        $fundingStage = $request->post('funding_stage', '');

        try {
            if ($id) {
                $stmt = $this->pdo->prepare(
                    "UPDATE organizations SET name=?, domain=?, type=?, country=?, city=?, website_url=?, 
                     description=?, crm_status=?, funding_stage=? WHERE id=?"
                );
                $stmt->execute([$name, $domain ?: null, $type, $country ?: null, $city ?: null, $websiteUrl ?: null, $description, $crmStatus, $fundingStage ?: null, $id]);
                $this->session->setFlash('success', 'Organization updated successfully.');
            } else {
                $stmt = $this->pdo->prepare(
                    "INSERT INTO organizations (name, domain, type, country, city, website_url, description, crm_status, funding_stage) 
                     VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
                );
                $stmt->execute([$name, $domain ?: null, $type, $country ?: null, $city ?: null, $websiteUrl ?: null, $description, $crmStatus, $fundingStage ?: null]);
                $id = $this->pdo->lastInsertId();
                $this->session->setFlash('success', 'Organization created successfully.');
            }

            $response->redirect('/admin/organizations/' . $id);
        } catch (Throwable $e) {
            $this->session->setFlash('error', 'Error saving organization: ' . $e->getMessage());
            $response->redirect('/admin/organizations' . ($id ? '/' . $id : '/create'));
        }
    }

    /**
     * Delete organization (soft delete).
     */
    public function delete(Request $request, Response $response, int $id): void
    {
        try {
            $stmt = $this->pdo->prepare("UPDATE organizations SET deleted_at = NOW() WHERE id = ?");
            $stmt->execute([$id]);
            $this->session->setFlash('success', 'Organization deleted.');
        } catch (Throwable $e) {
            $this->session->setFlash('error', 'Error deleting organization.');
        }
        $response->redirect('/admin/organizations');
    }
}