<?php

declare(strict_types=1);

/**
 * PrintStream → Kanban importer.
 *
 * Runs on a cron schedule (see docker/crontab).
 * For each board with import_from_printstream = 1:
 *   - Parses printstream_job_name into filter tokens (one per line)
 *   - Queries PrintStream SQL Server for open jobs matching each token
 *   - Inserts new cards (first column, first lane) or refreshes PrintStream
 *     fields on cards that already exist for this board
 */

require_once __DIR__ . '/../vendor/autoload.php';

// ── Load .env ─────────────────────────────────────────────────────────────────
(static function (): void {
    $file = __DIR__ . '/../.env';
    if (!file_exists($file)) {
        return;
    }
    foreach (file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) as $line) {
        $line = trim($line);
        if ($line === '' || $line[0] === '#' || !str_contains($line, '=')) {
            continue;
        }
        [$name, $value] = explode('=', $line, 2);
        $name  = trim($name);
        $value = trim($value);
        if ($name !== '' && getenv($name) === false) {
            putenv("{$name}={$value}");
            $_ENV[$name] = $value;
        }
    }
})();

// ── Helpers ───────────────────────────────────────────────────────────────────
function log_msg(string $msg): void
{
    echo '[' . date('Y-m-d H:i:s') . '] ' . $msg . PHP_EOL;
}

function safe_str(mixed $val): string
{
    return $val === null ? '' : (string) $val;
}

// ── Cron scheduling / enable check ───────────────────────────────────────────
// Pass --force (e.g. from the admin "Run Now" button) to bypass timing/enabled.
$force        = in_array('--force', $argv ?? []);
$settingsFile = __DIR__ . '/../storage/cron-settings.json';

$cronSettings = [];
if (file_exists($settingsFile)) {
    $cronSettings = json_decode((string) file_get_contents($settingsFile), true) ?? [];
}

$cronEnabled     = (bool) ($cronSettings['enabled']          ?? true);
$intervalMinutes = (int)  ($cronSettings['interval_minutes'] ?? 30);
$lastRun         = $cronSettings['last_run'] ?? null;

if (!$cronEnabled && !$force) {
    log_msg('Import disabled via admin settings. Exiting.');
    exit(0);
}

if (!$force && $lastRun !== null) {
    $elapsed = time() - (int) strtotime($lastRun);
    if ($elapsed < $intervalMinutes * 60) {
        exit(0); // silent — not time yet, avoids log noise every minute
    }
}

// Record start time before connecting so concurrent ticks skip.
$cronSettings['last_run'] = date('Y-m-d H:i:s');
@file_put_contents($settingsFile, json_encode($cronSettings, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . "\n");

// ── Connect to kanban SQLite DB ───────────────────────────────────────────────
$kanban = database();

// ── Connect to PrintStream SQL Server (FreeTDS via ODBC) ─────────────────────
$psCfg = require __DIR__ . '/../config/printstream.php';

if ($psCfg['host'] === '') {
    log_msg('ERROR: PRINTSTREAM_HOST is not set. Aborting.');
    exit(1);
}

$dsn = sprintf(
    'odbc:Driver={FreeTDS};Server=%s;Port=%d;Database=%s;UID=%s;PWD=%s;TDS_Version=7.4',
    $psCfg['host'],
    $psCfg['port'],
    $psCfg['database'],
    $psCfg['user'],
    $psCfg['password']
);

try {
    $ps = new PDO($dsn, null, null, [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    ]);
} catch (PDOException $e) {
    log_msg('ERROR: Cannot connect to PrintStream: ' . $e->getMessage());
    exit(1);
}

log_msg('Connected to PrintStream (' . $psCfg['host'] . '/' . $psCfg['database'] . ')');

// ── PrintStream queries ───────────────────────────────────────────────────────
// pdo_odbc uses SQLPrepare/SQLExecute for every call — SQLPrepare maps to
// sp_prepare in SQL Server which REJECTS CTEs (error 8180). ATTR_EMULATE_PREPARES
// is ignored by pdo_odbc. Solution: flatten to plain JOINs (no CTEs) and embed
// the token value directly after escaping single quotes (admin-controlled data).

// Main job query — flat JOINs, no CTEs.
// Token appended as: WHERE e2.[DETAILS1] LIKE '%escaped_token%'
$psSqlBase = "
SELECT DISTINCT
    s.[JOB NUMBER]                                                                       AS JobNumber,
    d.[NAMES]                                                                            AS CustomerName,
    e2.[DETAILS1]                                                                        AS JobName,
    e2.[FINAL DELIVERY]                                                                  AS FinalDelivery,
    e2.[ORIG_Qty1]                                                                       AS Quantity,
    CONCAT(ISNULL(e2.[DETAILS2],''),ISNULL(e2.[DETAILS3],''),ISNULL(e2.[DETAILS4],''),
           ISNULL(e2.[DETAILS5],''),ISNULL(e2.[DETAILS6],''),ISNULL(e2.[DETAILS7],''),
           ISNULL(e2.[DETAILS8],''),ISNULL(e2.[DETAILS9],''),ISNULL(e2.[DETAILS10],'')) AS Notes,
    e2.[ORIG_QuoteNo]                                                                    AS QuoteNo
FROM dbo.SCHEDFIL AS s
JOIN dbo.ESTIMATE    AS e  ON e.[DATAFLEX RECNUM ONE] = s.[ESTIMATE RECNUM]
JOIN dbo.CostCenters AS cc ON cc.[Code]               = s.[COST CENTRE]
LEFT JOIN dbo.DEBTOR   AS d  ON e.[DEBTOR]    = d.[AC NO]
LEFT JOIN dbo.ESTIMATE AS e2 ON s.[JOB NUMBER] = e2.[JOB NUMBER]
WHERE ISNULL(s.[COMPLETED],'')  <> 'Y'
  AND ISNULL(s.[CLOSED OUT],'') <> 'Y'
  AND ISNULL(e.[CLOSED OUT],'') <> 'Y'
  AND e.[DELIVERY DATE] > DATEADD(DAY, -365, CAST(GETDATE() AS date))
  AND s.[FILETYPE] IN ('D','Q','X','I','W','R','T','P')
  AND (s.[STATUS] IN ('*','6','7','0','1','2','3','4','5',' ') OR s.[STATUS] IS NULL)
  AND e2.[DETAILS1] LIKE ";

// Notes query — fetches all MDP notes for a list of QuoteNo values in one round-trip.
// PHP concatenates lines per QuoteNo. Token placeholder: __QUOTENOS__
$psNotesSqlBase = "
SELECT n.[RELATED TO] AS QuoteNo, ISNULL(n.[NOTE],'') AS NoteLine
FROM dbo.NOTES AS n
WHERE n.[MODULE] = 'MDP'
  AND n.[RELATED TO] IN (__QUOTENOS__)
ORDER BY n.[RELATED TO], TRY_CAST(n.[LINE NO] AS INT)
";

// ── Process boards ────────────────────────────────────────────────────────────
$boards = $kanban->query(
    'SELECT id, printstream_job_name FROM boards WHERE import_from_printstream = 1'
);

if (empty($boards)) {
    log_msg('No boards with import_from_printstream enabled. Nothing to do.');
    exit(0);
}

$totalBoards  = 0;
$totalCreated = 0;
$totalUpdated = 0;

foreach ($boards as $boardRow) {
    $boardId    = (int) $boardRow['id'];
    $filterMemo = safe_str($boardRow['printstream_job_name']);
    $totalBoards++;

    log_msg("Board ID {$boardId}:");

    try {
        $firstCol = $kanban->first(
            'SELECT id FROM board_columns WHERE board_id = :b ORDER BY position ASC LIMIT 1',
            ['b' => $boardId]
        );
        $firstLane = $kanban->first(
            'SELECT id FROM swim_lanes WHERE board_id = :b ORDER BY position ASC LIMIT 1',
            ['b' => $boardId]
        );
    } catch (\Throwable $e) {
        log_msg('  ERROR querying kanban DB: ' . $e->getMessage());
        continue;
    }

    if ($firstCol === null || $firstLane === null) {
        log_msg('  No columns or swim lanes — skipping.');
        continue;
    }

    $firstColId  = (int) $firstCol['id'];
    $firstLaneId = (int) $firstLane['id'];

    // Parse filter tokens (one per line, case-insensitive, deduplicated)
    $tokens = [];
    foreach (preg_split('/\r?\n/', $filterMemo) as $line) {
        $tok = trim($line);
        if ($tok !== '') {
            $tokens[strtolower($tok)] = $tok;
        }
    }

    if (empty($tokens)) {
        log_msg('  No job name filter configured — skipping.');
        continue;
    }

    // Query PrintStream for each token, collect unique jobs
    $jobs = [];   // keyed by strtolower(jobNumber)

    foreach ($tokens as $tok) {
        try {
            $escaped = str_replace("'", "''", $tok);
            $sql     = $psSqlBase . "'%" . $escaped . "%'";
            $stmt    = $ps->query($sql);
            $rows    = $stmt->fetchAll(PDO::FETCH_ASSOC);
        } catch (\Throwable $e) {
            log_msg("  WARNING: PrintStream query failed for '{$tok}': " . get_class($e) . ': ' . $e->getMessage());
            continue;
        }

        foreach ($rows as $row) {
            $jn = safe_str($row['JobNumber'] ?? '');
            if ($jn === '') {
                continue;
            }
            $key = strtolower($jn);
            if (!isset($jobs[$key])) {
                $rawDate = $row['FinalDelivery'] ?? null;
                $deliveryDate = null;
                if ($rawDate !== null && $rawDate !== '') {
                    $parsed = date_create((string) $rawDate);
                    $deliveryDate = $parsed ? $parsed->format('Y-m-d') : null;
                }

                $jobs[$key] = [
                    'job_number'    => $jn,
                    'customer_name' => safe_str($row['CustomerName'] ?? ''),
                    'job_name'      => safe_str($row['JobName'] ?? ''),
                    'delivery_date' => $deliveryDate,
                    'quantity'      => safe_str($row['Quantity'] ?? ''),
                    'notes'         => safe_str($row['Notes'] ?? ''),
                    'full_note'     => '',
                    '_quote_no'     => safe_str($row['QuoteNo'] ?? ''),
                ];
            }
        }
    }

    log_msg('  Found ' . count($jobs) . ' unique open job(s) matching filters.');

    // Fetch FullNote for all jobs in one batch query, concatenate lines in PHP
    if (!empty($jobs)) {
        $quoteNos = array_filter(array_column(array_values($jobs), '_quote_no'));
        if (!empty($quoteNos)) {
            try {
                $inList   = implode(',', array_map(fn($q) => "'" . str_replace("'", "''", $q) . "'", $quoteNos));
                $notesSql = str_replace('__QUOTENOS__', $inList, $psNotesSqlBase);
                $notesStmt = $ps->query($notesSql);
                $noteRows  = $notesStmt->fetchAll(PDO::FETCH_ASSOC);

                // Group note lines by QuoteNo and concatenate
                $notesByQuote = [];
                foreach ($noteRows as $nr) {
                    $qn = (string) ($nr['QuoteNo'] ?? '');
                    $notesByQuote[$qn] = ($notesByQuote[$qn] ?? '') . (string) ($nr['NoteLine'] ?? '');
                }

                // Map FullNote back to jobs via _quote_no
                foreach ($jobs as &$job) {
                    $qn = $job['_quote_no'];
                    if ($qn !== '' && isset($notesByQuote[$qn])) {
                        $job['full_note'] = $notesByQuote[$qn];
                    }
                }
                unset($job);
            } catch (\Throwable $e) {
                log_msg('  WARNING: FullNote query failed (notes will be empty): ' . $e->getMessage());
            }
        }
    }

    $now = date('Y-m-d H:i:s');

    foreach ($jobs as $job) {
        unset($job['_quote_no']);
        $existing = $kanban->first(
            'SELECT COUNT(*) AS cnt FROM cards WHERE board_id = :b AND job_number = :jn',
            ['b' => $boardId, 'jn' => $job['job_number']]
        );
        $alreadyExists = (int) ($existing['cnt'] ?? 0) > 0;

        if (!$alreadyExists) {
            // Determine next position in target cell
            $maxPos = $kanban->first(
                'SELECT MAX(position) AS m FROM cards WHERE column_id = :c AND swim_lane_id = :l',
                ['c' => $firstColId, 'l' => $firstLaneId]
            );
            $nextPos = ((int) ($maxPos['m'] ?? -1)) + 1;

            $kanban->execute(
                'INSERT INTO cards
                    (board_id, column_id, swim_lane_id, job_number, job_name, customer_name,
                     delivery_date, quantity, notes, full_note, position,
                     created_at, created_by, updated_at, updated_by)
                 VALUES
                    (:board_id, :column_id, :swim_lane_id, :job_number, :job_name, :customer_name,
                     :delivery_date, :quantity, :notes, :full_note, :position,
                     :created_at, :created_by, :updated_at, :updated_by)',
                [
                    'board_id'      => $boardId,
                    'column_id'     => $firstColId,
                    'swim_lane_id'  => $firstLaneId,
                    'job_number'    => $job['job_number'],
                    'job_name'      => $job['job_name'],
                    'customer_name' => $job['customer_name'],
                    'delivery_date' => $job['delivery_date'],
                    'quantity'      => $job['quantity'] !== '' ? $job['quantity'] : null,
                    'notes'         => $job['notes'],
                    'full_note'     => $job['full_note'],
                    'position'      => $nextPos,
                    'created_at'    => $now,
                    'created_by'    => 'printstream-import',
                    'updated_at'    => $now,
                    'updated_by'    => 'printstream-import',
                ]
            );

            log_msg('  + ' . $job['job_number'] . ' — ' . $job['job_name']);
            $totalCreated++;
        } else {
            // Refresh PrintStream fields without touching column/lane/position
            $kanban->execute(
                'UPDATE cards
                 SET job_name = :job_name, customer_name = :customer_name,
                     delivery_date = :delivery_date, quantity = :quantity,
                     notes = :notes, full_note = :full_note,
                     updated_at = :updated_at, updated_by = :updated_by
                 WHERE board_id = :board_id AND job_number = :job_number',
                [
                    'job_name'      => $job['job_name'],
                    'customer_name' => $job['customer_name'],
                    'delivery_date' => $job['delivery_date'],
                    'quantity'      => $job['quantity'] !== '' ? $job['quantity'] : null,
                    'notes'         => $job['notes'],
                    'full_note'     => $job['full_note'],
                    'updated_at'    => $now,
                    'updated_by'    => 'printstream-import',
                    'board_id'      => $boardId,
                    'job_number'    => $job['job_number'],
                ]
            );

            $totalUpdated++;
        }
    }
}

$ps = null;

log_msg('');
log_msg('Import complete.');
log_msg("  Boards processed : {$totalBoards}");
log_msg("  Cards created    : {$totalCreated}");
log_msg("  Cards updated    : {$totalUpdated}");