from __future__ import annotations

from pydantic import ValidationError
from quart import Blueprint, jsonify

from app.api.service import TaskManager, TaskScheduler
from app.api.v1.utils import ApiDependencies
from app.api.v1.utils import RunTaskRequest, TaskListRequest, CancelTaskRequest
from app.api.v1.utils import parse_json, validation_error_response
from app.infra.shared.tools import generate_task_trace_id


def create_tasks_bp(deps: ApiDependencies) -> Blueprint:
    bp = Blueprint("tasks", __name__)

    @bp.route("/run_task", methods=["POST"])
    async def run_task():
        trace_id = generate_task_trace_id()

        try:
            _, body = await parse_json(RunTaskRequest)
        except ValidationError as e:
            payload, status = validation_error_response(e)
            return jsonify(payload), status

        scheduler = TaskScheduler(
            body, deps.log, deps.db, trace_id, deps.config, deps.task_registry
        )
        result = await scheduler.deal()
        return jsonify(result)

    @bp.route("/tasks", methods=["POST"])
    async def list_tasks():
        try:
            _, body = await parse_json(TaskListRequest)
        except ValidationError as e:
            payload, status = validation_error_response(e)
            return jsonify(payload), status

        manager = TaskManager(pool=deps.db, data=body, config=deps.config)
        result = await manager.list_tasks()
        return jsonify(result)

    @bp.route("/cancel_task", methods=["POST"])
    async def cancel_task():
        try:
            _, body = await parse_json(CancelTaskRequest)
        except ValidationError as e:
            payload, status = validation_error_response(e)
            return jsonify(payload), status

        trace_id = body["trace_id"]
        scheduler = TaskScheduler(
            body, deps.log, deps.db, trace_id, deps.config, deps.task_registry
        )
        cancelled = await scheduler.cancel_task(trace_id)
        return jsonify({
            "code": 0 if cancelled else 4004,
            "message": "Task cancelled" if cancelled else "Task not found or already finished",
            "trace_id": trace_id,
        })

    @bp.route("/running_tasks", methods=["GET"])
    async def running_tasks():
        tasks = await deps.task_registry.get_running_tasks()
        return jsonify({"code": 0, "data": tasks, "total": len(tasks)})

    return bp