import json
from uuid import UUID, uuid4

import orjson
import pytest
from fastapi.testclient import TestClient
from sqlmodel import Session

from langflow.api.v1.schemas import FlowListCreate
from langflow.initial_setup.setup import load_starter_projects, load_flows_from_directory
from langflow.services.database.models.base import orjson_dumps
from langflow.services.database.models.flow import Flow, FlowCreate, FlowUpdate
from langflow.services.database.models.transactions.crud import get_transactions_by_flow_id
from langflow.services.database.utils import session_getter, migrate_transactions_from_monitor_service_to_database
from langflow.services.deps import get_db_service, get_monitor_service, session_scope
from langflow.services.monitor.schema import TransactionModel
from langflow.services.monitor.utils import (
    drop_and_create_table_if_schema_mismatch,
    new_duckdb_locked_connection,
    add_row_to_table,
)


@pytest.fixture(scope="module")
def json_style():
    # class FlowStyleBase(SQLModel):
    # color: str = Field(index=True)
    # emoji: str = Field(index=False)
    # flow_id: UUID = Field(default=None, foreign_key="flow.id")
    return orjson_dumps(
        {
            "color": "red",
            "emoji": "👍",
        }
    )


def test_create_flow(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    flow = FlowCreate(name=str(uuid4()), description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
    assert response.status_code == 201
    assert response.json()["name"] == flow.name
    assert response.json()["data"] == flow.data
    # flow is optional so we can create a flow without a flow
    flow = FlowCreate(name="Test Flow")
    response = client.post("api/v1/flows/", json=flow.model_dump(exclude_unset=True), headers=logged_in_headers)
    assert response.status_code == 201
    assert response.json()["name"] == flow.name
    assert response.json()["data"] == flow.data


def test_read_flows(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow_data = orjson.loads(json_flow)
    data = flow_data["data"]
    flow = FlowCreate(name=str(uuid4()), description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
    assert response.status_code == 201
    assert response.json()["name"] == flow.name
    assert response.json()["data"] == flow.data

    flow = FlowCreate(name=str(uuid4()), description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
    assert response.status_code == 201
    assert response.json()["name"] == flow.name
    assert response.json()["data"] == flow.data

    response = client.get("api/v1/flows/", headers=logged_in_headers)
    assert response.status_code == 200
    assert len(response.json()) > 0


def test_read_flow(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    flow = FlowCreate(name="Test Flow", description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
    flow_id = response.json()["id"]  # flow_id should be a UUID but is a string
    # turn it into a UUID
    flow_id = UUID(flow_id)

    response = client.get(f"api/v1/flows/{flow_id}", headers=logged_in_headers)
    assert response.status_code == 200
    assert response.json()["name"] == flow.name
    assert response.json()["data"] == flow.data


def test_update_flow(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]

    flow = FlowCreate(name="Test Flow", description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)

    flow_id = response.json()["id"]
    updated_flow = FlowUpdate(
        name="Updated Flow",
        description="updated description",
        data=data,
    )
    response = client.patch(f"api/v1/flows/{flow_id}", json=updated_flow.model_dump(), headers=logged_in_headers)

    assert response.status_code == 200
    assert response.json()["name"] == updated_flow.name
    assert response.json()["description"] == updated_flow.description
    # assert response.json()["data"] == updated_flow.data


def test_delete_flow(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    flow = FlowCreate(name="Test Flow", description="description", data=data)
    response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
    flow_id = response.json()["id"]
    response = client.delete(f"api/v1/flows/{flow_id}", headers=logged_in_headers)
    assert response.status_code == 200
    assert response.json()["message"] == "Flow deleted successfully"


def test_delete_flows(client: TestClient, json_flow: str, active_user, logged_in_headers):
    # Create ten flows
    number_of_flows = 10
    flows = [FlowCreate(name=f"Flow {i}", description="description", data={}) for i in range(number_of_flows)]
    flow_ids = []
    for flow in flows:
        response = client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
        assert response.status_code == 201
        flow_ids.append(response.json()["id"])

    response = client.request("DELETE", "api/v1/flows/", headers=logged_in_headers, json=flow_ids)
    assert response.status_code == 200, response.content
    assert response.json().get("deleted") == number_of_flows


def test_create_flows(client: TestClient, session: Session, json_flow: str, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    # Create test data
    flow_list = FlowListCreate(
        flows=[
            FlowCreate(name="Flow 1", description="description", data=data),
            FlowCreate(name="Flow 2", description="description", data=data),
        ]
    )
    # Make request to endpoint
    response = client.post("api/v1/flows/batch/", json=flow_list.dict(), headers=logged_in_headers)
    # Check response status code
    assert response.status_code == 201
    # Check response data
    response_data = response.json()
    assert len(response_data) == 2
    assert response_data[0]["name"] == "Flow 1"
    assert response_data[0]["description"] == "description"
    assert response_data[0]["data"] == data
    assert response_data[1]["name"] == "Flow 2"
    assert response_data[1]["description"] == "description"
    assert response_data[1]["data"] == data


def test_upload_file(client: TestClient, session: Session, json_flow: str, logged_in_headers):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    # Create test data
    flow_list = FlowListCreate(
        flows=[
            FlowCreate(name="Flow 1", description="description", data=data),
            FlowCreate(name="Flow 2", description="description", data=data),
        ]
    )
    file_contents = orjson_dumps(flow_list.dict())
    response = client.post(
        "api/v1/flows/upload/",
        files={"file": ("examples.json", file_contents, "application/json")},
        headers=logged_in_headers,
    )
    # Check response status code
    assert response.status_code == 201
    # Check response data
    response_data = response.json()
    assert len(response_data) == 2
    assert response_data[0]["name"] == "Flow 1"
    assert response_data[0]["description"] == "description"
    assert response_data[0]["data"] == data
    assert response_data[1]["name"] == "Flow 2"
    assert response_data[1]["description"] == "description"
    assert response_data[1]["data"] == data


def test_download_file(
    client: TestClient,
    session: Session,
    json_flow,
    active_user,
    logged_in_headers,
):
    flow = orjson.loads(json_flow)
    data = flow["data"]
    # Create test data
    flow_list = FlowListCreate(
        flows=[
            FlowCreate(name="Flow 1", description="description", data=data),
            FlowCreate(name="Flow 2", description="description", data=data),
        ]
    )
    db_manager = get_db_service()
    with session_getter(db_manager) as session:
        saved_flows = []
        for flow in flow_list.flows:
            flow.user_id = active_user.id
            db_flow = Flow.model_validate(flow, from_attributes=True)
            session.add(db_flow)
            saved_flows.append(db_flow)
        session.commit()
        # Make request to endpoint inside the session context
        flow_ids = [str(db_flow.id) for db_flow in saved_flows]  # Convert UUIDs to strings
        flow_ids_json = json.dumps(flow_ids)
        response = client.post(
            "api/v1/flows/download/",
            data=flow_ids_json,
            headers={**logged_in_headers, "Content-Type": "application/json"},
        )
    # Check response status code
    assert response.status_code == 200, response.json()
    # Check response data
    # Since the endpoint now returns a zip file, we need to check the content type and the filename in the headers
    assert response.headers["Content-Type"] == "application/x-zip-compressed"
    assert "attachment; filename=" in response.headers["Content-Disposition"]


def test_create_flow_with_invalid_data(client: TestClient, active_user, logged_in_headers):
    flow = {"name": "a" * 256, "data": "Invalid flow data"}
    response = client.post("api/v1/flows/", json=flow, headers=logged_in_headers)
    assert response.status_code == 422


def test_get_nonexistent_flow(client: TestClient, active_user, logged_in_headers):
    uuid = uuid4()
    response = client.get(f"api/v1/flows/{uuid}", headers=logged_in_headers)
    assert response.status_code == 404


def test_update_flow_idempotency(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow_data = orjson.loads(json_flow)
    data = flow_data["data"]
    flow_data = FlowCreate(name="Test Flow", description="description", data=data)
    response = client.post("api/v1/flows/", json=flow_data.dict(), headers=logged_in_headers)
    flow_id = response.json()["id"]
    updated_flow = FlowCreate(name="Updated Flow", description="description", data=data)
    response1 = client.put(f"api/v1/flows/{flow_id}", json=updated_flow.model_dump(), headers=logged_in_headers)
    response2 = client.put(f"api/v1/flows/{flow_id}", json=updated_flow.model_dump(), headers=logged_in_headers)
    assert response1.json() == response2.json()


def test_update_nonexistent_flow(client: TestClient, json_flow: str, active_user, logged_in_headers):
    flow_data = orjson.loads(json_flow)
    data = flow_data["data"]
    uuid = uuid4()
    updated_flow = FlowCreate(
        name="Updated Flow",
        description="description",
        data=data,
    )
    response = client.patch(f"api/v1/flows/{uuid}", json=updated_flow.model_dump(), headers=logged_in_headers)
    assert response.status_code == 404, response.text


def test_delete_nonexistent_flow(client: TestClient, active_user, logged_in_headers):
    uuid = uuid4()
    response = client.delete(f"api/v1/flows/{uuid}", headers=logged_in_headers)
    assert response.status_code == 404


def test_read_only_starter_projects(client: TestClient, active_user, logged_in_headers):
    response = client.get("api/v1/flows/", headers=logged_in_headers)
    starter_projects = load_starter_projects()
    assert response.status_code == 200
    assert len(response.json()) == len(starter_projects)


@pytest.mark.load_flows
def test_load_flows(client: TestClient, load_flows_dir):
    response = client.get("api/v1/flows/c54f9130-f2fa-4a3e-b22a-3856d946351b")
    assert response.status_code == 200
    assert response.json()["name"] == "BasicExample"
    # re-run to ensure updates work well
    load_flows_from_directory()
    response = client.get("api/v1/flows/c54f9130-f2fa-4a3e-b22a-3856d946351b")
    assert response.status_code == 200
    assert response.json()["name"] == "BasicExample"


@pytest.mark.load_flows
def test_migrate_transactions(client: TestClient):
    monitor_service = get_monitor_service()
    drop_and_create_table_if_schema_mismatch(str(monitor_service.db_path), "transactions", TransactionModel)
    flow_id = "c54f9130-f2fa-4a3e-b22a-3856d946351b"
    data = {
        "vertex_id": "vid",
        "target_id": "tid",
        "inputs": {"input_value": True},
        "outputs": {"output_value": True},
        "timestamp": "2021-10-10T10:10:10",
        "status": "success",
        "error": None,
        "flow_id": flow_id,
    }
    with new_duckdb_locked_connection(str(monitor_service.db_path), read_only=False) as conn:
        add_row_to_table(conn, "transactions", TransactionModel, data)
    assert 1 == len(monitor_service.get_transactions())

    with session_scope() as session:
        migrate_transactions_from_monitor_service_to_database(session)
        new_trans = get_transactions_by_flow_id(session, UUID(flow_id))
        assert 1 == len(new_trans)
        t = new_trans[0]
        assert t.error is None
        assert t.inputs == data["inputs"]
        assert t.outputs == data["outputs"]
        assert t.status == data["status"]
        assert str(t.timestamp) == "2021-10-10 10:10:10"
        assert t.vertex_id == data["vertex_id"]
        assert t.target_id == data["target_id"]
        assert t.flow_id == UUID(flow_id)

        assert 0 == len(monitor_service.get_transactions())

        client.request("DELETE", f"api/v1/flows/{flow_id}")
    with session_scope() as session:
        new_trans = get_transactions_by_flow_id(session, UUID(flow_id))
        assert 0 == len(new_trans)