<?php
// OPUS5 — Plan Registry (doctrine 83)
// CRUD pour les plans multi-étapes: admin.wevia_plans + admin.wevia_plan_steps
// Actions: init, create, list, get, update_status, add_step, list_steps
header('Content-Type: application/json');
$R = ['ts'=>date('c'), 'source'=>'opus5-plan-registry'];

$PG_DSN = 'pgsql:host=10.1.0.3;port=5432;dbname=adx_system;user=admin;password=admin123';
try {
    $db = new PDO($PG_DSN, null, null, [PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION, PDO::ATTR_TIMEOUT=>5]);
} catch (Throwable $e) {
    http_response_code(500); echo json_encode(['err'=>'pg_connect', 'msg'=>$e->getMessage()]); exit;
}

$raw = file_get_contents('php://input');
$d = json_decode($raw, true) ?: [];
$action = $_GET['action'] ?? ($d['action'] ?? 'list');

if ($action === 'init') {
    try {
        $db->exec("CREATE TABLE IF NOT EXISTS admin.wevia_plans (
            plan_id VARCHAR(64) PRIMARY KEY,
            name VARCHAR(255) NOT NULL,
            description TEXT,
            status VARCHAR(32) DEFAULT 'draft',
            priority INT DEFAULT 0,
            created_by VARCHAR(64) DEFAULT 'opus5',
            created_at TIMESTAMP DEFAULT NOW(),
            started_at TIMESTAMP,
            finished_at TIMESTAMP,
            metadata JSONB DEFAULT '{}'::jsonb
        )");
        $db->exec("CREATE INDEX IF NOT EXISTS idx_plans_status ON admin.wevia_plans(status)");
        $db->exec("CREATE INDEX IF NOT EXISTS idx_plans_created ON admin.wevia_plans(created_at DESC)");
        
        $db->exec("CREATE TABLE IF NOT EXISTS admin.wevia_plan_steps (
            step_id SERIAL PRIMARY KEY,
            plan_id VARCHAR(64) REFERENCES admin.wevia_plans(plan_id) ON DELETE CASCADE,
            step_order INT NOT NULL,
            step_name VARCHAR(255),
            step_type VARCHAR(32) DEFAULT 'action',
            action_url TEXT,
            action_method VARCHAR(8) DEFAULT 'POST',
            action_payload JSONB,
            depends_on INT[] DEFAULT '{}'::int[],
            status VARCHAR(32) DEFAULT 'pending',
            result TEXT,
            started_at TIMESTAMP,
            finished_at TIMESTAMP,
            task_id VARCHAR(64),
            retry_count INT DEFAULT 0
        )");
        $db->exec("CREATE INDEX IF NOT EXISTS idx_steps_plan ON admin.wevia_plan_steps(plan_id, step_order)");
        $db->exec("CREATE INDEX IF NOT EXISTS idx_steps_status ON admin.wevia_plan_steps(status)");
        
        $R['tables_ready'] = ['admin.wevia_plans', 'admin.wevia_plan_steps'];
    } catch (Throwable $e) { $R['err'] = $e->getMessage(); }
    $R['doctrine'] = '83 — plan registry PG tables (plans + plan_steps)';
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'create') {
    $name = substr((string)($d['name'] ?? ''), 0, 255);
    $description = (string)($d['description'] ?? '');
    $priority = (int)($d['priority'] ?? 0);
    $steps = $d['steps'] ?? []; // array of step definitions
    if (!$name) { http_response_code(400); echo json_encode(['err'=>'no_name']); exit; }
    
    $plan_id = 'plan_' . date('YmdHis') . '_' . bin2hex(random_bytes(3));
    try {
        $db->beginTransaction();
        $stmt = $db->prepare("INSERT INTO admin.wevia_plans (plan_id, name, description, priority, metadata) VALUES (?,?,?,?,?::jsonb)");
        $stmt->execute([$plan_id, $name, $description, $priority, json_encode($d['metadata'] ?? [])]);
        
        $step_count = 0;
        foreach ($steps as $idx => $s) {
            $stmt = $db->prepare("INSERT INTO admin.wevia_plan_steps (plan_id, step_order, step_name, step_type, action_url, action_method, action_payload, depends_on) VALUES (?,?,?,?,?,?,?::jsonb,?::int[])");
            $depends = '{' . implode(',', array_map('intval', $s['depends_on'] ?? [])) . '}';
            $stmt->execute([
                $plan_id,
                $idx + 1,
                substr((string)($s['name'] ?? "step_" . ($idx+1)), 0, 255),
                substr((string)($s['type'] ?? 'action'), 0, 32),
                (string)($s['url'] ?? ''),
                substr((string)($s['method'] ?? 'POST'), 0, 8),
                json_encode($s['payload'] ?? []),
                $depends
            ]);
            $step_count++;
        }
        $db->commit();
        $R['plan_id'] = $plan_id;
        $R['steps_created'] = $step_count;
    } catch (Throwable $e) {
        if ($db->inTransaction()) $db->rollBack();
        http_response_code(500); echo json_encode(['err'=>$e->getMessage()]); exit;
    }
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'list') {
    $limit = min(50, (int)($_GET['limit'] ?? 20));
    $status_filter = preg_replace('/[^a-z_]/', '', $_GET['status'] ?? '');
    $sql = "SELECT plan_id, name, status, priority, created_at, finished_at, (SELECT COUNT(*) FROM admin.wevia_plan_steps WHERE plan_id=p.plan_id) AS steps_total, (SELECT COUNT(*) FROM admin.wevia_plan_steps WHERE plan_id=p.plan_id AND status='done') AS steps_done FROM admin.wevia_plans p";
    if ($status_filter) $sql .= " WHERE status='$status_filter'";
    $sql .= " ORDER BY created_at DESC LIMIT $limit";
    $rows = $db->query($sql)->fetchAll(PDO::FETCH_ASSOC);
    $R['count'] = count($rows);
    $R['plans'] = $rows;
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'get') {
    $pid = preg_replace('/[^a-z0-9_-]/i', '', $_GET['plan_id'] ?? $d['plan_id'] ?? '');
    if (!$pid) { http_response_code(400); echo json_encode(['err'=>'no_plan_id']); exit; }
    $stmt = $db->prepare("SELECT * FROM admin.wevia_plans WHERE plan_id=?");
    $stmt->execute([$pid]);
    $plan = $stmt->fetch(PDO::FETCH_ASSOC);
    if (!$plan) { http_response_code(404); echo json_encode(['err'=>'not_found']); exit; }
    $stmt = $db->prepare("SELECT * FROM admin.wevia_plan_steps WHERE plan_id=? ORDER BY step_order");
    $stmt->execute([$pid]);
    $plan['steps'] = $stmt->fetchAll(PDO::FETCH_ASSOC);
    $R['plan'] = $plan;
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'update_status') {
    $pid = preg_replace('/[^a-z0-9_-]/i', '', (string)($d['plan_id'] ?? ''));
    $status = preg_replace('/[^a-z_]/', '', (string)($d['status'] ?? ''));
    if (!$pid || !$status) { http_response_code(400); echo json_encode(['err'=>'missing']); exit; }
    if ($status === 'running') {
        $db->prepare("UPDATE admin.wevia_plans SET status=?, started_at=COALESCE(started_at, NOW()) WHERE plan_id=?")->execute([$status, $pid]);
    } elseif (in_array($status, ['done','failed','cancelled'])) {
        $db->prepare("UPDATE admin.wevia_plans SET status=?, finished_at=NOW() WHERE plan_id=?")->execute([$status, $pid]);
    } else {
        $db->prepare("UPDATE admin.wevia_plans SET status=? WHERE plan_id=?")->execute([$status, $pid]);
    }
    $R['updated'] = $pid;
    $R['new_status'] = $status;
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'update_step') {
    $step_id = (int)($d['step_id'] ?? 0);
    $status = preg_replace('/[^a-z_]/', '', (string)($d['status'] ?? ''));
    $result = (string)($d['result'] ?? '');
    if (!$step_id) { http_response_code(400); echo json_encode(['err'=>'no_step_id']); exit; }
    if ($status === 'running') {
        $db->prepare("UPDATE admin.wevia_plan_steps SET status=?, started_at=NOW() WHERE step_id=?")->execute([$status, $step_id]);
    } elseif (in_array($status, ['done','failed'])) {
        $db->prepare("UPDATE admin.wevia_plan_steps SET status=?, result=?, finished_at=NOW() WHERE step_id=?")->execute([$status, substr($result,0,5000), $step_id]);
    }
    $R['step_updated'] = $step_id;
    echo json_encode($R, JSON_PRETTY_PRINT);
    exit;
}

http_response_code(400);
echo json_encode(['err'=>'unknown_action', 'available'=>['init','create','list','get','update_status','update_step']]);