<?php
namespace Moko\Component\MokoSuiteField\Api\Controller;

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\MVC\Controller\BaseController;
use Joomla\Database\DatabaseInterface;

/**
 * Estimates + Route API.
 *
 * GET    /estimates             — List estimates
 * POST   /estimates             — Create estimate from field
 * PATCH  /estimates/{id}/status — Update estimate status (approve/reject)
 * POST   /estimates/{id}/convert— Convert estimate to work order
 * GET    /route/{techId}        — Get optimized daily route
 * POST   /route/{techId}/optimize — Trigger route optimization
 */
class FieldEstimatesController extends BaseController
{
	private function requireAuth(string $action = 'core.manage'): void
	{
		$user = Factory::getApplication()->getIdentity();
		if (!$user || $user->guest || (!$user->authorise('core.admin') && !$user->authorise($action, 'com_mokosuitefield'))) {
			http_response_code(403);
			echo json_encode(['error' => 'Access denied.']);
			Factory::getApplication()->close();
		}
	}

	public function listEstimates(): void
	{
		$this->requireAuth('core.manage');
		$db = Factory::getContainer()->get(DatabaseInterface::class);
		$input = Factory::getApplication()->getInput();

		$query = $db->getQuery(true)
			->select('e.*, cd.name AS customer_name, loc.address')
			->from($db->quoteName('#__mokosuitefield_estimates', 'e'))
			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = e.contact_id')
			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = e.location_id')
			->order('e.created DESC');

		$status = $input->getString('status', '');
		if ($status) $query->where($db->quoteName('e.status') . ' = ' . $db->quote($status));

		$techId = $input->getInt('technician_id', 0);
		if ($techId) $query->where('e.technician_id = ' . $techId);

		$db->setQuery($query, 0, 100);
		$this->sendJson($db->loadObjectList() ?: []);
	}

	public function createEstimate(): void
	{
		$this->requireAuth('core.create');
		$input = Factory::getApplication()->getInput();

		$estimateId = \Moko\Plugin\System\MokoSuiteField\Helper\EstimateHelper::createEstimate(
			$input->getInt('contact_id', 0),
			$input->getInt('location_id', 0),
			$input->getString('trade', 'general'),
			$input->getString('description', ''),
			json_decode($input->getString('line_items', '[]'), true) ?: []
		);

		$this->sendJson(['success' => true, 'estimate_id' => $estimateId]);
	}

	public function updateStatus(): void
	{
		$this->requireAuth('core.edit');
		$input = Factory::getApplication()->getInput();
		$id = $input->getInt('id', 0);
		$status = $input->getString('status', '');

		if (!in_array($status, ['sent', 'approved', 'rejected', 'expired'])) {
			http_response_code(400);
			$this->sendJson(['error' => 'Invalid status']);
			return;
		}

		$db = Factory::getContainer()->get(DatabaseInterface::class);
		$update = (object) [
			'id'     => $id,
			'status' => $status,
		];

		if ($status === 'approved') {
			$update->approved_at = Factory::getDate()->toSql();
		}

		$db->updateObject('#__mokosuitefield_estimates', $update, 'id');
		$this->sendJson(['success' => true]);
	}

	public function convertToWorkOrder(): void
	{
		$this->requireAuth('core.create');
		$id = Factory::getApplication()->getInput()->getInt('id', 0);

		$woId = \Moko\Plugin\System\MokoSuiteField\Helper\EstimateHelper::convertToWorkOrder($id);

		if (!$woId) {
			http_response_code(400);
			$this->sendJson(['error' => 'Could not convert estimate']);
			return;
		}

		$this->sendJson(['success' => true, 'work_order_id' => $woId]);
	}

	public function getRoute(): void
	{
		$this->requireAuth('core.manage');
		$techId = Factory::getApplication()->getInput()->getInt('tech_id', 0);
		$date = Factory::getApplication()->getInput()->getString('date', date('Y-m-d'));

		$route = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::getTechRoute($techId, $date);
		$metrics = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::estimateRouteMetrics($techId, $date);

		$this->sendJson([
			'route'   => $route,
			'metrics' => $metrics,
		]);
	}

	public function optimizeRoute(): void
	{
		$this->requireAuth('core.manage');
		$techId = Factory::getApplication()->getInput()->getInt('tech_id', 0);
		$date = Factory::getApplication()->getInput()->getString('date', date('Y-m-d'));

		$optimized = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::optimizeRoute($techId, $date);
		$metrics = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::estimateRouteMetrics($techId, $date);

		$this->sendJson([
			'route'   => $optimized,
			'metrics' => $metrics,
		]);
	}

	private function sendJson(mixed $data): void
	{
		header('Content-Type: application/json; charset=utf-8');
		echo json_encode($data, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE);
		Factory::getApplication()->close();
	}
}