#
#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#
import json
import logging
import re
import sys
from functools import partial

import flask
import trio
from flask import request, Response
from flask_login import login_required, current_user

from agent.component import LLM
from api import settings
from api.db import CanvasCategory, FileType
from api.db.services.canvas_service import CanvasTemplateService, UserCanvasService, API4ConversationService
from api.db.services.document_service import DocumentService
from api.db.services.file_service import FileService
from api.db.services.pipeline_operation_log_service import PipelineOperationLogService
from api.db.services.task_service import queue_dataflow, CANVAS_DEBUG_DOC_ID, TaskService
from api.db.services.user_service import TenantService
from api.db.services.user_canvas_version import UserCanvasVersionService
from api.settings import RetCode
from api.utils import get_uuid
from api.utils.api_utils import get_json_result, server_error_response, validate_request, get_data_error_result
from agent.canvas import Canvas
from peewee import MySQLDatabase, PostgresqlDatabase
from api.db.db_models import APIToken, Task
import time

from api.utils.file_utils import filename_type, read_potential_broken_pdf
from rag.flow.pipeline import Pipeline
from rag.nlp import search
from rag.utils.redis_conn import REDIS_CONN


@manager.route('/templates', methods=['GET'])  # noqa: F821
@login_required
def templates():
    return get_json_result(data=[c.to_dict() for c in CanvasTemplateService.get_all()])


@manager.route('/rm', methods=['POST'])  # noqa: F821
@validate_request("canvas_ids")
@login_required
def rm():
    for i in request.json["canvas_ids"]:
        if not UserCanvasService.accessible(i, current_user.id):
            return get_json_result(
                data=False, message='Only owner of canvas authorized for this operation.',
                code=RetCode.OPERATING_ERROR)
        UserCanvasService.delete_by_id(i)
    return get_json_result(data=True)


@manager.route('/set', methods=['POST'])  # noqa: F821
@validate_request("dsl", "title")
@login_required
def save():
    req = request.json
    if not isinstance(req["dsl"], str):
        req["dsl"] = json.dumps(req["dsl"], ensure_ascii=False)
    req["dsl"] = json.loads(req["dsl"])
    cate = req.get("canvas_category", CanvasCategory.Agent)
    if "id" not in req:
        req["user_id"] = current_user.id
        if UserCanvasService.query(user_id=current_user.id, title=req["title"].strip(), canvas_category=cate):
            return get_data_error_result(message=f"{req['title'].strip()} already exists.")
        req["id"] = get_uuid()
        if not UserCanvasService.save(**req):
            return get_data_error_result(message="Fail to save canvas.")
    else:
        if not UserCanvasService.accessible(req["id"], current_user.id):
            return get_json_result(
                data=False, message='Only owner of canvas authorized for this operation.',
                code=RetCode.OPERATING_ERROR)
        UserCanvasService.update_by_id(req["id"], req)
    # save version
    UserCanvasVersionService.insert(user_canvas_id=req["id"], dsl=req["dsl"], title="{0}_{1}".format(req["title"], time.strftime("%Y_%m_%d_%H_%M_%S")))
    UserCanvasVersionService.delete_all_versions(req["id"])
    return get_json_result(data=req)


@manager.route('/get/<canvas_id>', methods=['GET'])  # noqa: F821
@login_required
def get(canvas_id):
    if not UserCanvasService.accessible(canvas_id, current_user.id):
        return get_data_error_result(message="canvas not found.")
    e, c = UserCanvasService.get_by_canvas_id(canvas_id)
    return get_json_result(data=c)


@manager.route('/getsse/<canvas_id>', methods=['GET'])  # type: ignore # noqa: F821
def getsse(canvas_id):
    token = request.headers.get('Authorization').split()
    if len(token) != 2:
        return get_data_error_result(message='Authorization is not valid!"')
    token = token[1]
    objs = APIToken.query(beta=token)
    if not objs:
        return get_data_error_result(message='Authentication error: API key is invalid!"')
    tenant_id = objs[0].tenant_id
    if not UserCanvasService.query(user_id=tenant_id, id=canvas_id):
        return get_json_result(
            data=False,
            message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR
        )
    e, c = UserCanvasService.get_by_id(canvas_id)
    if not e or c.user_id != tenant_id:
        return get_data_error_result(message="canvas not found.")
    return get_json_result(data=c.to_dict())


@manager.route('/completion', methods=['POST'])  # noqa: F821
@validate_request("id")
@login_required
def run():
    req = request.json
    query = req.get("query", "")
    files = req.get("files", [])
    inputs = req.get("inputs", {})
    user_id = req.get("user_id", current_user.id)
    if not UserCanvasService.accessible(req["id"], current_user.id):
        return get_json_result(
            data=False, message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR)

    e, cvs = UserCanvasService.get_by_id(req["id"])
    if not e:
        return get_data_error_result(message="canvas not found.")

    if not isinstance(cvs.dsl, str):
        cvs.dsl = json.dumps(cvs.dsl, ensure_ascii=False)

    if cvs.canvas_category == CanvasCategory.DataFlow:
        task_id = get_uuid()
        Pipeline(cvs.dsl, tenant_id=current_user.id, doc_id=CANVAS_DEBUG_DOC_ID, task_id=task_id, flow_id=req["id"])
        ok, error_message = queue_dataflow(tenant_id=user_id, flow_id=req["id"], task_id=task_id, file=files[0], priority=0)
        if not ok:
            return get_data_error_result(message=error_message)
        return get_json_result(data={"message_id": task_id})

    try:
        canvas = Canvas(cvs.dsl, current_user.id, req["id"])
    except Exception as e:
        return server_error_response(e)

    def sse():
        nonlocal canvas, user_id
        try:
            for ans in canvas.run(query=query, files=files, user_id=user_id, inputs=inputs):
                yield "data:" + json.dumps(ans, ensure_ascii=False) + "\n\n"

            cvs.dsl = json.loads(str(canvas))
            UserCanvasService.update_by_id(req["id"], cvs.to_dict())
        except Exception as e:
            logging.exception(e)
            yield "data:" + json.dumps({"code": 500, "message": str(e), "data": False}, ensure_ascii=False) + "\n\n"

    resp = Response(sse(), mimetype="text/event-stream")
    resp.headers.add_header("Cache-control", "no-cache")
    resp.headers.add_header("Connection", "keep-alive")
    resp.headers.add_header("X-Accel-Buffering", "no")
    resp.headers.add_header("Content-Type", "text/event-stream; charset=utf-8")
    return resp


@manager.route('/rerun', methods=['POST'])  # noqa: F821
@validate_request("id", "dsl", "component_id")
@login_required
def rerun():
    req = request.json
    doc = PipelineOperationLogService.get_documents_info(req["id"])
    if not doc:
        return get_data_error_result(message="Document not found.")
    doc = doc[0]
    if 0 < doc["progress"] < 1:
        return get_data_error_result(message=f"`{doc['name']}` is processing...")

    if settings.docStoreConn.indexExist(search.index_name(current_user.id), doc["kb_id"]):
        settings.docStoreConn.delete({"doc_id": doc["id"]}, search.index_name(current_user.id), doc["kb_id"])
    doc["progress_msg"] = ""
    doc["chunk_num"] = 0
    doc["token_num"] = 0
    DocumentService.clear_chunk_num_when_rerun(doc["id"])
    DocumentService.update_by_id(id, doc)
    TaskService.filter_delete([Task.doc_id == id])

    dsl = req["dsl"]
    dsl["path"] = [req["component_id"]]
    PipelineOperationLogService.update_by_id(req["id"], {"dsl": dsl})
    queue_dataflow(tenant_id=current_user.id, flow_id=req["id"], task_id=get_uuid(), doc_id=doc["id"], priority=0, rerun=True)
    return get_json_result(data=True)


@manager.route('/cancel/<task_id>', methods=['PUT'])  # noqa: F821
@login_required
def cancel(task_id):
    try:
        REDIS_CONN.set(f"{task_id}-cancel", "x")
    except Exception as e:
        logging.exception(e)
    return get_json_result(data=True)


@manager.route('/reset', methods=['POST'])  # noqa: F821
@validate_request("id")
@login_required
def reset():
    req = request.json
    if not UserCanvasService.accessible(req["id"], current_user.id):
        return get_json_result(
            data=False, message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR)
    try:
        e, user_canvas = UserCanvasService.get_by_id(req["id"])
        if not e:
            return get_data_error_result(message="canvas not found.")

        canvas = Canvas(json.dumps(user_canvas.dsl), current_user.id)
        canvas.reset()
        req["dsl"] = json.loads(str(canvas))
        UserCanvasService.update_by_id(req["id"], {"dsl": req["dsl"]})
        return get_json_result(data=req["dsl"])
    except Exception as e:
        return server_error_response(e)


@manager.route("/upload/<canvas_id>", methods=["POST"])  # noqa: F821
def upload(canvas_id):
    e, cvs = UserCanvasService.get_by_canvas_id(canvas_id)
    if not e:
        return get_data_error_result(message="canvas not found.")

    user_id = cvs["user_id"]
    def structured(filename, filetype, blob, content_type):
        nonlocal user_id
        if filetype == FileType.PDF.value:
            blob = read_potential_broken_pdf(blob)

        location = get_uuid()
        FileService.put_blob(user_id, location, blob)

        return {
            "id": location,
            "name": filename,
            "size": sys.getsizeof(blob),
            "extension": filename.split(".")[-1].lower(),
            "mime_type": content_type,
            "created_by": user_id,
            "created_at": time.time(),
            "preview_url": None
        }

    if request.args.get("url"):
        from crawl4ai import (
            AsyncWebCrawler,
            BrowserConfig,
            CrawlerRunConfig,
            DefaultMarkdownGenerator,
            PruningContentFilter,
            CrawlResult
        )
        try:
            url = request.args.get("url")
            filename = re.sub(r"\?.*", "", url.split("/")[-1])
            async def adownload():
                browser_config = BrowserConfig(
                    headless=True,
                    verbose=False,
                )
                async with AsyncWebCrawler(config=browser_config) as crawler:
                    crawler_config = CrawlerRunConfig(
                        markdown_generator=DefaultMarkdownGenerator(
                            content_filter=PruningContentFilter()
                        ),
                        pdf=True,
                        screenshot=False
                    )
                    result: CrawlResult = await crawler.arun(
                        url=url,
                        config=crawler_config
                    )
                    return result
            page = trio.run(adownload())
            if page.pdf:
                if filename.split(".")[-1].lower() != "pdf":
                    filename += ".pdf"
                return get_json_result(data=structured(filename, "pdf", page.pdf, page.response_headers["content-type"]))

            return get_json_result(data=structured(filename, "html", str(page.markdown).encode("utf-8"), page.response_headers["content-type"], user_id))

        except Exception as e:
            return  server_error_response(e)

    file = request.files['file']
    try:
        DocumentService.check_doc_health(user_id, file.filename)
        return get_json_result(data=structured(file.filename, filename_type(file.filename), file.read(), file.content_type))
    except Exception as e:
        return  server_error_response(e)


@manager.route('/input_form', methods=['GET'])  # noqa: F821
@login_required
def input_form():
    cvs_id = request.args.get("id")
    cpn_id = request.args.get("component_id")
    try:
        e, user_canvas = UserCanvasService.get_by_id(cvs_id)
        if not e:
            return get_data_error_result(message="canvas not found.")
        if not UserCanvasService.query(user_id=current_user.id, id=cvs_id):
            return get_json_result(
                data=False, message='Only owner of canvas authorized for this operation.',
                code=RetCode.OPERATING_ERROR)

        canvas = Canvas(json.dumps(user_canvas.dsl), current_user.id)
        return get_json_result(data=canvas.get_component_input_form(cpn_id))
    except Exception as e:
        return server_error_response(e)


@manager.route('/debug', methods=['POST'])  # noqa: F821
@validate_request("id", "component_id", "params")
@login_required
def debug():
    req = request.json
    if not UserCanvasService.accessible(req["id"], current_user.id):
        return get_json_result(
            data=False, message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR)
    try:
        e, user_canvas = UserCanvasService.get_by_id(req["id"])
        canvas = Canvas(json.dumps(user_canvas.dsl), current_user.id)
        canvas.reset()
        canvas.message_id = get_uuid()
        component = canvas.get_component(req["component_id"])["obj"]
        component.reset()

        if isinstance(component, LLM):
            component.set_debug_inputs(req["params"])
        component.invoke(**{k: o["value"] for k,o in req["params"].items()})
        outputs = component.output()
        for k in outputs.keys():
            if isinstance(outputs[k], partial):
                txt = ""
                for c in outputs[k]():
                    txt += c
                outputs[k] = txt
        return get_json_result(data=outputs)
    except Exception as e:
        return server_error_response(e)


@manager.route('/test_db_connect', methods=['POST'])  # noqa: F821
@validate_request("db_type", "database", "username", "host", "port", "password")
@login_required
def test_db_connect():
    req = request.json
    try:
        if req["db_type"] in ["mysql", "mariadb"]:
            db = MySQLDatabase(req["database"], user=req["username"], host=req["host"], port=req["port"],
                               password=req["password"])
        elif req["db_type"] == 'postgres':
            db = PostgresqlDatabase(req["database"], user=req["username"], host=req["host"], port=req["port"],
                                    password=req["password"])
        elif req["db_type"] == 'mssql':
            import pyodbc
            connection_string = (
                f"DRIVER={{ODBC Driver 17 for SQL Server}};"
                f"SERVER={req['host']},{req['port']};"
                f"DATABASE={req['database']};"
                f"UID={req['username']};"
                f"PWD={req['password']};"
            )
            db = pyodbc.connect(connection_string)
            cursor = db.cursor()
            cursor.execute("SELECT 1")
            cursor.close()
        elif req["db_type"] == 'IBM DB2':
            import ibm_db
            conn_str = (
                f"DATABASE={req['database']};"
                f"HOSTNAME={req['host']};"
                f"PORT={req['port']};"
                f"PROTOCOL=TCPIP;"
                f"UID={req['username']};"
                f"PWD={req['password']};"
            )
            logging.info(conn_str)
            conn = ibm_db.connect(conn_str, "", "")
            stmt = ibm_db.exec_immediate(conn, "SELECT 1 FROM sysibm.sysdummy1")
            ibm_db.fetch_assoc(stmt)
            ibm_db.close(conn)
            return get_json_result(data="Database Connection Successful!")
        elif req["db_type"] == 'trino':
            def _parse_catalog_schema(db: str):
                if not db:
                    return None, None
                if "." in db:
                    c, s = db.split(".", 1)
                elif "/" in db:
                    c, s = db.split("/", 1)
                else:
                    c, s = db, "default"
                return c, s
            try:
                import trino
                import os
                from trino.auth import BasicAuthentication
            except Exception:
                return server_error_response("Missing dependency 'trino'. Please install: pip install trino")

            catalog, schema = _parse_catalog_schema(req["database"])
            if not catalog:
                return server_error_response("For Trino, 'database' must be 'catalog.schema' or at least 'catalog'.")
            
            http_scheme = "https" if os.environ.get("TRINO_USE_TLS", "0") == "1" else "http"

            auth = None
            if http_scheme == "https" and req.get("password"):
                auth = BasicAuthentication(req.get("username") or "ragflow", req["password"])

            conn = trino.dbapi.connect(
                host=req["host"],
                port=int(req["port"] or 8080),
                user=req["username"] or "ragflow",
                catalog=catalog,
                schema=schema or "default",
                http_scheme=http_scheme,
                auth=auth
            )
            cur = conn.cursor()
            cur.execute("SELECT 1")
            cur.fetchall()
            cur.close()
            conn.close()
            return get_json_result(data="Database Connection Successful!")
        else:
            return server_error_response("Unsupported database type.")
        if req["db_type"] != 'mssql':
            db.connect()
        db.close()

        return get_json_result(data="Database Connection Successful!")
    except Exception as e:
        return server_error_response(e)


#api get list version dsl of canvas
@manager.route('/getlistversion/<canvas_id>', methods=['GET'])  # noqa: F821
@login_required
def getlistversion(canvas_id):
    try:
        list =sorted([c.to_dict() for c in UserCanvasVersionService.list_by_canvas_id(canvas_id)], key=lambda x: x["update_time"]*-1)
        return get_json_result(data=list)
    except Exception as e:
        return get_data_error_result(message=f"Error getting history files: {e}")


#api get version dsl of canvas
@manager.route('/getversion/<version_id>', methods=['GET'])  # noqa: F821
@login_required
def getversion( version_id):
    try:

        e, version = UserCanvasVersionService.get_by_id(version_id)
        if version:
            return get_json_result(data=version.to_dict())
    except Exception as e:
        return get_json_result(data=f"Error getting history file: {e}")


@manager.route('/list', methods=['GET'])  # noqa: F821
@login_required
def list_canvas():
    keywords = request.args.get("keywords", "")
    page_number = int(request.args.get("page", 0))
    items_per_page = int(request.args.get("page_size", 0))
    orderby = request.args.get("orderby", "create_time")
    canvas_category = request.args.get("canvas_category")
    if request.args.get("desc", "true").lower() == "false":
        desc = False
    else:
        desc = True
    owner_ids = [id for id in request.args.get("owner_ids", "").strip().split(",") if id]
    if not owner_ids:
        tenants = TenantService.get_joined_tenants_by_user_id(current_user.id)
        tenants = [m["tenant_id"] for m in tenants]
        tenants.append(current_user.id)
        canvas, total = UserCanvasService.get_by_tenant_ids(
            tenants, current_user.id, page_number,
            items_per_page, orderby, desc, keywords, canvas_category)
    else:
        tenants = owner_ids
        canvas, total = UserCanvasService.get_by_tenant_ids(
            tenants, current_user.id, 0,
            0, orderby, desc, keywords, canvas_category)
    return get_json_result(data={"canvas": canvas, "total": total})


@manager.route('/setting', methods=['POST'])  # noqa: F821
@validate_request("id", "title", "permission")
@login_required
def setting():
    req = request.json
    req["user_id"] = current_user.id

    if not UserCanvasService.accessible(req["id"], current_user.id):
        return get_json_result(
            data=False, message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR)

    e,flow = UserCanvasService.get_by_id(req["id"])
    if not e:
        return get_data_error_result(message="canvas not found.")
    flow = flow.to_dict()
    flow["title"] = req["title"]

    for key in ["description", "permission", "avatar"]:
        if value := req.get(key):
            flow[key] = value

    num= UserCanvasService.update_by_id(req["id"], flow)
    return get_json_result(data=num)


@manager.route('/trace', methods=['GET'])  # noqa: F821
def trace():
    cvs_id = request.args.get("canvas_id")
    msg_id = request.args.get("message_id")
    try:
        bin = REDIS_CONN.get(f"{cvs_id}-{msg_id}-logs")
        if not bin:
            return get_json_result(data={})

        return get_json_result(data=json.loads(bin.encode("utf-8")))
    except Exception as e:
        logging.exception(e)


@manager.route('/<canvas_id>/sessions', methods=['GET'])  # noqa: F821
@login_required
def sessions(canvas_id):
    tenant_id = current_user.id
    if not UserCanvasService.accessible(canvas_id, tenant_id):
        return get_json_result(
            data=False, message='Only owner of canvas authorized for this operation.',
            code=RetCode.OPERATING_ERROR)

    user_id = request.args.get("user_id")
    page_number = int(request.args.get("page", 1))
    items_per_page = int(request.args.get("page_size", 30))
    keywords = request.args.get("keywords")
    from_date = request.args.get("from_date")
    to_date = request.args.get("to_date")
    orderby = request.args.get("orderby", "update_time")
    if request.args.get("desc") == "False" or request.args.get("desc") == "false":
        desc = False
    else:
        desc = True
    # dsl defaults to True in all cases except for False and false
    include_dsl = request.args.get("dsl") != "False" and request.args.get("dsl") != "false"
    total, sess = API4ConversationService.get_list(canvas_id, tenant_id, page_number, items_per_page, orderby, desc,
                                             None, user_id, include_dsl, keywords, from_date, to_date)
    try:
        return get_json_result(data={"total": total, "sessions": sess})
    except Exception as e:
        return server_error_response(e)


@manager.route('/prompts', methods=['GET'])  # noqa: F821
@login_required
def prompts():
    from rag.prompts.generator import ANALYZE_TASK_SYSTEM, ANALYZE_TASK_USER, NEXT_STEP, REFLECT, CITATION_PROMPT_TEMPLATE
    return get_json_result(data={
        "task_analysis": ANALYZE_TASK_SYSTEM +"\n\n"+ ANALYZE_TASK_USER,
        "plan_generation": NEXT_STEP,
        "reflection": REFLECT,
        #"context_summary": SUMMARY4MEMORY,
        #"context_ranking": RANK_MEMORY,
        "citation_guidelines": CITATION_PROMPT_TEMPLATE
    })


@manager.route('/download', methods=['GET'])  # noqa: F821
def download():
    id = request.args.get("id")
    created_by = request.args.get("created_by")
    blob = FileService.get_blob(created_by, id)
    return flask.make_response(blob)