"""任务域 API：任务计划/分组/自定义动作/元素抓取/步骤测试。"""
import re
import time
import uuid
import threading
from datetime import datetime
from concurrent.futures import ThreadPoolExecutor, as_completed, TimeoutError as FuturesTimeout

from flask import (Blueprint, jsonify, request, Response)
from flask_login import login_required

from core import device_pool, uiauto_helper
from core.adb_helper import adb_connect_light
from core.models import db, DeviceGroup, TaskJob, CustomAction
from core.logger import get_logger

_log = get_logger("web")
from web import context
from web.auth import perm_required, PERM_DEVICES, PERM_TASKS
from tasks import list_task_types, get_task_class
from web.common import _merged_device_list

bp = Blueprint("tasks", __name__)

@bp.route("/api/task_types")
@login_required
def api_task_types():
    return jsonify({"ok": True, "task_types": list_task_types()})

@bp.route("/api/actions")
@login_required
def api_actions():
    """返回指定任务类型支持的专属操作。"""
    task_type = request.args.get("task_type", "")
    task_cls = get_task_class(task_type)
    if not task_cls:
        return jsonify({"ok": False, "error": "未知任务类型", "actions": []})
    actions = task_cls.list_action_types()
    return jsonify({"ok": True, "actions": actions})

@bp.route("/api/devices")
@login_required
def api_devices():
    """返回所有在线设备 serial（供分组表单勾选用）。"""
    try:
        return jsonify({"ok": True, "devices": context.mgr.list_all_serials()})
    except Exception as e:
        return jsonify({"ok": False, "error": str(e)}), 500


# ================== API：任务计划 CRUD ==================
def _job_next_run(job):
    """任务下次执行时间，格式化为 "YYYY-MM-DD HH:MM"（Flask 序列化 aware datetime 会变 GMT 格式）。"""
    nr = context.mgr.next_run_of(job)
    return nr.strftime("%Y-%m-%d %H:%M") if nr else None

def _job_coverage(job, configured):
    """任务覆盖的设备（监控页「任务运行概况」展示用）。

    与 TaskJob.resolve_serials 的差别：这里按 **target 定义**给出「这台任务会覆盖
    哪些设备」，不因设备当前是否空闲而变（在线/运行中由前端拿实时状态标注），
    也不做离线过滤、不写调度日志——它是每 5s 轮询的展示接口。
    """
    tgt = job.target or {}
    mode = tgt.get("mode", "all")
    try:
        if mode == "serial":
            serials = [tgt.get("serial") or ""]
        elif mode == "group":
            g = context.mgr.groups.get(tgt.get("group_name"))
            serials = [s for s in (list(g.serials) if g else []) if s in configured]
        else:
            serials = sorted(configured)
        serials = [s for s in serials if s]
        return {"mode": mode, "serials": serials, "total": len(serials)}
    except Exception as e:
        _log.warning(f"任务「{job.name}」覆盖设备解析失败: {e}")
        return {"mode": mode, "serials": [], "total": 0, "error": str(e)[:80]}


def _configured_set():
    """设备池清单（coverage 计算用，取一次给所有任务复用）。"""
    try:
        return set(device_pool.list_configured())
    except Exception:
        return set()


@bp.route("/api/jobs")
@login_required
def api_jobs_list():
    configured = _configured_set()
    jobs = []
    for j in context.mgr.jobs.values():
        d = j.to_dict()
        d["next_run"] = _job_next_run(j)
        d["coverage"] = _job_coverage(j, configured)
        jobs.append(d)
    return jsonify({"ok": True, "jobs": jobs,
                    "task_types": list_task_types()})

@bp.route("/api/jobs", methods=["POST"])
@perm_required(PERM_TASKS)
def api_jobs_create():
    data = request.json or {}
    name = (data.get("name") or "").strip()
    if not name:
        return jsonify({"ok": False, "error": "任务名不能为空"}), 400
    task_type = data.get("task_type", "generic_steps")
    if not get_task_class(task_type):
        return jsonify({"ok": False, "error": f"未知任务类型: {task_type}"}), 400
    job = context.mgr.add_job(
        name=name, task_type=task_type,
        target=data.get("target", {"mode": "all"}),
        params=data.get("params", {}),
        schedule=data.get("schedule", {"mode": "once"}),
        retry=data.get("retry", {"max_attempts": 1, "delay": 60}),
        enabled=data.get("enabled", True))
    d = job.to_dict()
    d["next_run"] = _job_next_run(job)
    d["coverage"] = _job_coverage(job, _configured_set())
    return jsonify({"ok": True, "msg": "任务已创建", "job": d})

@bp.route("/api/jobs/<job_id>", methods=["PUT"])
@perm_required(PERM_TASKS)
def api_jobs_update(job_id):
    job = context.mgr.jobs.get(job_id)
    if not job:
        return jsonify({"ok": False, "error": "任务不存在"}), 404
    data = request.json or {}
    fields = {}
    for k in ("name", "task_type", "target", "params", "schedule", "retry", "enabled"):
        if k in data:
            fields[k] = data[k]
    if "task_type" in fields and not get_task_class(fields["task_type"]):
        return jsonify({"ok": False, "error": f"未知任务类型: {fields['task_type']}"}), 400
    context.mgr.update_job(job_id, **fields)
    d = job.to_dict()
    d["next_run"] = _job_next_run(job)
    d["coverage"] = _job_coverage(job, _configured_set())
    return jsonify({"ok": True, "msg": "任务已更新", "job": d})

@bp.route("/api/jobs/<job_id>", methods=["DELETE"])
@perm_required(PERM_TASKS)
def api_jobs_delete(job_id):
    if context.mgr.delete_job(job_id):
        return jsonify({"ok": True, "msg": "任务已删除"})
    return jsonify({"ok": False, "error": "任务不存在"}), 404

@bp.route("/api/jobs/<job_id>/run", methods=["POST"])
@perm_required(PERM_TASKS)
def api_jobs_run(job_id):
    return jsonify(context.mgr.run_job_now(job_id))

@bp.route("/api/jobs/<job_id>/toggle", methods=["POST"])
@perm_required(PERM_TASKS)
def api_jobs_toggle(job_id):
    enabled = (request.json or {}).get("enabled", True)
    job = context.mgr.toggle_job(job_id, enabled)
    if not job:
        return jsonify({"ok": False, "error": "任务不存在"}), 404
    return jsonify({"ok": True, "msg": f"任务已{'启用' if enabled else '停用'}"})


# ================== API：设备分组 CRUD ==================

@bp.route("/api/groups")
@login_required
def api_groups_list():
    return jsonify({"ok": True, "groups": [g.to_dict() for g in context.mgr.groups.values()]})

@bp.route("/api/groups", methods=["POST"])
@perm_required(PERM_TASKS)
def api_groups_create():
    data = request.json or {}
    name = (data.get("name") or "").strip()
    if not name:
        return jsonify({"ok": False, "error": "分组名不能为空"}), 400
    if name in context.mgr.groups:
        return jsonify({"ok": False, "error": "分组名已存在"}), 400
    context.mgr.add_group(name, data.get("serials", []), data.get("description", ""))
    return jsonify({"ok": True, "msg": "分组已创建"})

@bp.route("/api/groups/<name>", methods=["PUT"])
@perm_required(PERM_TASKS)
def api_groups_update(name):
    if name not in context.mgr.groups:
        return jsonify({"ok": False, "error": "分组不存在"}), 404
    data = request.json or {}
    context.mgr.update_group(name,
                     serials=data.get("serials"),
                     description=data.get("description"))
    return jsonify({"ok": True, "msg": "分组已更新"})

@bp.route("/api/groups/<name>", methods=["DELETE"])
@perm_required(PERM_TASKS)
def api_groups_delete(name):
    if context.mgr.delete_group(name):
        return jsonify({"ok": True, "msg": "分组已删除"})
    return jsonify({"ok": False, "error": "分组不存在"}), 404


# ================== API：用户管理 CRUD ==================

@bp.route("/api/custom_actions")
@login_required
def api_custom_actions_list():
    rows = CustomAction.query.order_by(CustomAction.created_at.desc()).all()
    return jsonify({"ok": True, "actions": [r.to_dict() for r in rows]})

@bp.route("/api/custom_actions", methods=["POST"])
@perm_required(PERM_TASKS)
def api_custom_actions_create():
    data = request.json or {}
    name = (data.get("name") or "").strip()
    if not name:
        return jsonify({"ok": False, "error": "动作名不能为空"}), 400
    steps = data.get("steps", [])
    if not steps:
        return jsonify({"ok": False, "error": "至少需要1个步骤"}), 400
    row = CustomAction(id=uuid.uuid4().hex[:8], name=name,
                       icon=data.get("icon") or "📦",
                       created_at=datetime.now().strftime("%Y-%m-%d %H:%M"))
    row.set_steps(steps)
    db.session.add(row)
    db.session.commit()
    return jsonify({"ok": True, "msg": "动作已保存", "action": row.to_dict()})

@bp.route("/api/custom_actions/<action_id>", methods=["PUT"])
@perm_required(PERM_TASKS)
def api_custom_actions_update(action_id):
    row = CustomAction.query.get(action_id)
    if not row:
        return jsonify({"ok": False, "error": "动作不存在"}), 404
    data = request.json or {}
    if "name" in data:
        name = (data["name"] or "").strip()
        if not name:
            return jsonify({"ok": False, "error": "动作名不能为空"}), 400
        row.name = name
    if "icon" in data:
        row.icon = data["icon"] or "📦"
    if "steps" in data:
        if not data["steps"]:
            return jsonify({"ok": False, "error": "至少需要1个步骤"}), 400
        row.set_steps(data["steps"])
    db.session.commit()
    return jsonify({"ok": True, "msg": "已更新", "action": row.to_dict()})

@bp.route("/api/custom_actions/<action_id>", methods=["DELETE"])
@perm_required(PERM_TASKS)
def api_custom_actions_delete(action_id):
    row = CustomAction.query.get(action_id)
    if not row:
        return jsonify({"ok": False, "error": "动作不存在"}), 404
    db.session.delete(row)
    db.session.commit()
    return jsonify({"ok": True, "msg": "已删除"})

@bp.route("/api/uiauto/elements")
@perm_required(PERM_DEVICES)
def api_uiauto_elements():
    """获取设备当前 UI 元素树（供步骤编辑器"抓取元素"用）。

    依赖本地运行的 uiautodev 服务（端口 20242）。
    ?serial=xxx  设备 serial
    返回：
      200 — {ok:true, elements:[...]}
      503 — {ok:false, error:"..."}（uiauto2 未启动）
    """
    serial = request.args.get("serial", "")
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    ok, data = uiauto_helper.get_elements(serial)
    if ok:
        return jsonify({"ok": True, "elements": data})
    return jsonify({"ok": False, "error": data}), 503

@bp.route("/api/uiauto/status")
@login_required
def api_uiauto_status():
    """探测 uiauto2 本地服务是否运行（前端按钮禁启用）。"""
    return jsonify({"ok": True, "running": uiauto_helper.is_running()})

@bp.route("/api/steps/test", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_steps_test():
    """测试单个步骤：在指定设备上试执行，验证选择器是否命中（步骤编辑器"测试此步骤"）。

    请求: {"serial": "100.100.10.11:5555", "step": {"type": "click", "params": {...}}}
    只读连接（adb connect + u2），与运行中任务互不干扰。
    返回 result: "命中" / "未找到" / "已执行"。
    """
    data = request.json or {}
    serial = (data.get("serial") or "").strip()
    step = data.get("step") or {}
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    if not step.get("type"):
        return jsonify({"ok": False, "error": "缺少步骤类型"}), 400
    from tasks.generic.task import test_step
    ok, msg, result = test_step(serial, step)
    res_txt = {True: "命中", False: "未找到"}.get(result, "已执行")
    _log.info(f"测试步骤 {step.get('type')} @ {serial}: {res_txt} ({msg})")
    return jsonify({"ok": ok, "msg": msg, "result": res_txt})

@bp.route("/api/uiauto/devices")
@perm_required(PERM_DEVICES)
def api_uiauto_devices():
    """获取可选设备列表（抓取元素用）。

    uiautodev 只认识本地 adb 已连接的设备；设备池里在线但未本地连接的设备
    在这里补全，并先做一次轻量 adb connect（单次尝试，绝不 kill-server），
    让它们可被 uiautodev 抓取。
    """
    ok, data = uiauto_helper.list_devices()
    if not ok:
        return jsonify({"ok": False, "error": data}), 503
    seen = {d.get("serial") for d in data}
    try:
        online = set(device_pool.list_online())
        pool = [s for s in device_pool.list_configured() if s in online]
    except Exception:
        pool = []
    added = 0
    for serial in pool:
        if not serial or serial in seen:
            continue
        # 轻量连接（单次尝试，不重试不 kill-server）；连不上也照样列出，
        # 前端抓取时会报明确错误，不影响其他设备的连接
        adb_connect_light(serial)
        data.append({
            "serial": serial,
            "model": "",
            "product": "",
            "name": serial,
            "status": "device",
            "enabled": True,
        })
        seen.add(serial)
        added += 1
    if added:
        _log.info(f"抓取元素设备列表补全 {added} 台在线设备: {list(seen)}")
    return jsonify({"ok": True, "devices": data})

@bp.route("/api/uiauto/screenshot")
@perm_required(PERM_DEVICES)
def api_uiauto_screenshot():
    """通过 uiauto2 获取设备截图（供抓取元素时显示设备画面）。

    ?serial=xxx  设备 serial
    直接返回 image/jpeg，前端用 <img> 加载。
    """
    serial = request.args.get("serial", "")
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    ok, data = uiauto_helper.get_screenshot(serial)
    if ok:
        return Response(data, mimetype="image/jpeg",
                        headers={"Cache-Control": "no-store"})
    return jsonify({"ok": False, "error": data}), 503


# ================== API：远程看屏（阶段 2） ==================
# MJPEG 实时画面流 + u2 触控注入。数据源 u2（atx-agent minicap 截图，单帧 ~200ms），
# 零新依赖（原计划 ws-scrcpy 不在 npm 分发，GitHub 下载在国内不可靠，改自建）。
# 坐标约定：前端以 <img> 显示尺寸归一化后映射到设备原生分辨率（naturalWidth/Height）。
_SCREEN_JPEG_QUALITY = 65
_SCREEN_FRAME_GAP = 0.05  # 帧间最小间隔（秒），防止空转烧 CPU

def _job_next_run(job):
    """任务下次执行时间，格式化为 "YYYY-MM-DD HH:MM"（Flask 序列化 aware datetime 会变 GMT 格式）。"""
    nr = context.mgr.next_run_of(job)
    return nr.strftime("%Y-%m-%d %H:%M") if nr else None