"""
CloudSearch Transfer — HTTP API 服务 v1.0.0
以 Flask 微服务形式运行，与 CloudSearch 主应用通过 HTTP 通信
"""

import os
import uuid
import logging
from flask import Flask, request, jsonify
from config import ConfigManager
from orchestration.transfer import TransferOrchestrator

# ─── 初始化 ────────────────────────────────────────────

app = Flask(__name__)
config = ConfigManager()
orchestrator = TransferOrchestrator(config)

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)
logger = logging.getLogger("transfer_api")


# ─── 健康检查 ──────────────────────────────────────────

@app.route("/health", methods=["GET"])
def health():
    return jsonify({
        "status": "ok",
        "version": "1.0.0",
        "platforms": orchestrator.get_stats(),
    })


# ─── 转存接口 ──────────────────────────────────────────

@app.route("/api/transfer", methods=["POST"])
def transfer():
    """转存分享链接"""
    data = request.get_json() or {}
    share_url = data.get("share_url", "").strip()
    if not share_url:
        return jsonify({"error": "share_url is required"}), 400

    save_dir = data.get("save_dir", "")
    share_password = data.get("share_password", "")
    async_mode = data.get("async", False)

    try:
        if async_mode:
            task_id = orchestrator.transfer_async(share_url, save_dir, share_password)
            return jsonify({"task_id": task_id, "status": "pending"})
        else:
            result = orchestrator.transfer(share_url, save_dir, share_password)
            return jsonify({
                "success": result.success,
                "platform": result.platform,
                "new_file_id": result.new_file_id,
                "file_name": result.file_name,
                "share_url": result.share_url,
                "share_password": result.share_password,
                "elapsed_ms": result.elapsed_ms,
            })
    except Exception as e:
        logger.exception("Transfer failed")
        return jsonify({"error": str(e), "code": getattr(e, "code", 500)}), 500


# ─── 验证接口 ──────────────────────────────────────────

@app.route("/api/verify", methods=["POST"])
def verify():
    """验证分享链接有效性"""
    data = request.get_json() or {}
    share_url = data.get("share_url", "").strip()
    if not share_url:
        return jsonify({"error": "share_url is required"}), 400

    result = orchestrator.verify(share_url)
    return jsonify({
        "valid": result.valid,
        "platform": result.platform,
        "title": result.title,
        "file_count": result.file_count,
        "files": [{"fid": f.fid, "name": f.name, "size": f.size}
                  for f in (result.files or [])],
        "error": result.error.to_dict() if result.error else None,
    })


# ─── 任务查询 ──────────────────────────────────────────

@app.route("/api/task/<task_id>", methods=["GET"])
def get_task(task_id):
    """查询异步任务状态"""
    task = orchestrator.get_task(task_id)
    if not task:
        return jsonify({"error": "task not found"}), 404

    result = {
        "task_id": task.task_id,
        "status": task.status,
        "share_url": task.share_url,
        "platform": task.platform,
        "created_at": task.created_at,
        "completed_at": task.completed_at,
    }
    if task.result:
        result["result"] = {
            "success": task.result.success,
            "share_url": task.result.share_url,
            "file_name": task.result.file_name,
            "elapsed_ms": task.result.elapsed_ms,
        }
    if task.error:
        result["error"] = task.error

    return jsonify(result)


@app.route("/api/tasks", methods=["GET"])
def list_tasks():
    """列出任务"""
    status = request.args.get("status")
    limit = int(request.args.get("limit", 50))
    tasks = orchestrator.list_tasks(status=status, limit=limit)
    return jsonify({
        "tasks": [
            {
                "task_id": t.task_id,
                "status": t.status,
                "share_url": t.share_url[:80],
                "platform": t.platform,
                "created_at": t.created_at,
            }
            for t in tasks
        ],
        "total": len(tasks),
    })


# ─── 统计 ──────────────────────────────────────────────

@app.route("/api/stats", methods=["GET"])
def stats():
    """获取统计信息"""
    return jsonify(orchestrator.get_stats())


# ─── 配置管理 ──────────────────────────────────────────

@app.route("/api/config/platforms", methods=["GET"])
def get_platforms():
    """获取平台配置列表"""
    platforms = {}
    for name, cfg in config.platforms.items():
        platforms[name] = {
            "enabled": cfg.enabled,
            "account_name": cfg.account_name,
            "save_dir": cfg.save_dir,
            "has_cookie": bool(cfg.cookie),
            "has_refresh_token": bool(cfg.refresh_token),
        }
    return jsonify({"platforms": platforms})


@app.route("/api/config/platforms/<name>", methods=["PUT"])
def update_platform(name):
    """更新平台配置"""
    data = request.get_json() or {}
    if name not in config.platforms:
        from config import PlatformConfig
        config.platforms[name] = PlatformConfig()

    cfg = config.platforms[name]
    if "enabled" in data:
        cfg.enabled = data["enabled"]
    if "cookie" in data:
        cfg.cookie = data["cookie"]
    if "refresh_token" in data:
        cfg.refresh_token = data["refresh_token"]
    if "save_dir" in data:
        cfg.save_dir = data["save_dir"]
    if "share_password" in data:
        cfg.share_password = data["share_password"]

    config.save()
    orchestrator.factory.invalidate_cache(name)
    return jsonify({"status": "ok", "platform": name})


# ─── 启动 ──────────────────────────────────────────────

if __name__ == "__main__":
    port = int(os.getenv("PORT", 9528))
    debug = os.getenv("FLASK_DEBUG", "0") == "1"
    logger.info(f"Starting transfer service on port {port}")
    app.run(host="0.0.0.0", port=port, debug=debug)