import sanitizeHtml from "sanitize-html";
import sanitizeHtmlOptions from "../html/sanitizeHtmlOptions";
import updateDbEntry from "./updateDbEntry";
import _ from "lodash";
import encrypt from "../../dsql/encrypt";
import connDbHandler from "../../../utils/db/conn-db-handler";
import checkIfIsMaster from "../../../utils/check-if-is-master";
import { DbContextsArray } from "./runQuery";
import debugLog from "../../../utils/logging/debug-log";
import {
    APIResponseObject,
    DSQL_TableSchemaType,
    PostInsertReturn,
} from "../../../types";
import purgeDefaultFields from "../../../utils/purge-default-fields";

export type AddDbEntryParam<
    T extends { [k: string]: any } = any,
    K extends string = string
> = {
    dbContext?: (typeof DbContextsArray)[number];
    paradigm?: "Read Only" | "Full Access";
    dbFullName?: string;
    tableName: K;
    data?: T;
    batchData?: T[];
    tableSchema?: DSQL_TableSchemaType;
    duplicateColumnName?: keyof T;
    duplicateColumnValue?: string | number;
    /**
     * Update Entry if a duplicate is found.
     * Requires `duplicateColumnName` and `duplicateColumnValue` parameters
     */
    update?: boolean;
    encryptionKey?: string;
    encryptionSalt?: string;
    forceLocal?: boolean;
    debug?: boolean;
};

/**
 * Add a db Entry Function
 */
export default async function addDbEntry<
    T extends { [k: string]: any } = any,
    K extends string = string
>({
    dbContext,
    paradigm,
    dbFullName,
    tableName,
    data,
    batchData,
    tableSchema,
    duplicateColumnName,
    duplicateColumnValue,
    update,
    encryptionKey,
    encryptionSalt,
    forceLocal,
    debug,
}: AddDbEntryParam<T, K>): Promise<APIResponseObject<PostInsertReturn>> {
    const isMaster = forceLocal
        ? true
        : checkIfIsMaster({ dbContext, dbFullName });

    if (debug) {
        debugLog({
            log: isMaster,
            addTime: true,
            label: "isMaster",
        });
    }

    const DB_CONN = isMaster
        ? global.DSQL_DB_CONN
        : global.DSQL_FULL_ACCESS_DB_CONN || global.DSQL_DB_CONN;
    const DB_RO_CONN = isMaster
        ? global.DSQL_DB_CONN
        : global.DSQL_READ_ONLY_DB_CONN || global.DSQL_DB_CONN;

    let newData = _.cloneDeep(data);
    if (newData) {
        newData = purgeDefaultFields(newData);
    }

    let newBatchData = _.cloneDeep(batchData) as any[];
    if (newBatchData) {
        newBatchData = purgeDefaultFields(newBatchData);
    }

    if (
        duplicateColumnName &&
        typeof duplicateColumnName === "string" &&
        newData
    ) {
        const checkDuplicateQuery = `SELECT * FROM ${
            isMaster ? "" : `\`${dbFullName}\`.`
        }\`${tableName}\` WHERE \`${duplicateColumnName}\`=?`;

        const duplicateValue = await connDbHandler(
            DB_RO_CONN,
            checkDuplicateQuery,
            [duplicateColumnValue]
        );

        if (duplicateValue?.[0] && !update) {
            return {
                success: false,
                payload: undefined,
                msg: "Duplicate entry found",
            };
        } else if (duplicateValue?.[0] && update) {
            return await updateDbEntry({
                dbContext,
                dbFullName,
                tableName,
                data: newData,
                tableSchema,
                encryptionKey,
                encryptionSalt,
                identifierColumnName: duplicateColumnName,
                identifierValue: duplicateColumnValue || "",
            });
        }
    }

    function generateQuery(data: T) {
        const dataKeys = Object.keys(data);

        let insertKeysArray = [];
        let insertValuesArray = [];

        for (let i = 0; i < dataKeys.length; i++) {
            try {
                const dataKey = dataKeys[i];
                let value = data[dataKey];

                const targetFieldSchemaArray = tableSchema
                    ? tableSchema?.fields?.filter(
                          (field) => field.fieldName == dataKey
                      )
                    : null;
                const targetFieldSchema =
                    targetFieldSchemaArray && targetFieldSchemaArray[0]
                        ? targetFieldSchemaArray[0]
                        : null;

                if (value == null || value == undefined) continue;

                if (
                    targetFieldSchema?.dataType?.match(/int$/i) &&
                    typeof value == "string" &&
                    !value?.match(/./)
                )
                    continue;

                if (targetFieldSchema?.encrypted) {
                    value = encrypt({
                        data: value,
                        encryptionKey,
                        encryptionSalt,
                    });
                    console.log("DSQL: Encrypted value =>", value);
                }

                const htmlRegex = /<[^>]+>/g;

                if (
                    targetFieldSchema?.richText ||
                    String(value).match(htmlRegex)
                ) {
                    value = sanitizeHtml(value, sanitizeHtmlOptions);
                }

                if (targetFieldSchema?.pattern) {
                    const pattern = new RegExp(
                        targetFieldSchema.pattern,
                        targetFieldSchema.patternFlags || ""
                    );
                    if (!pattern.test(value)) {
                        console.log("DSQL: Pattern not matched =>", value);
                        value = "";
                    }
                }

                insertKeysArray.push("`" + dataKey + "`");

                if (typeof value === "object") {
                    value = JSON.stringify(value);
                }

                if (typeof value == "number") {
                    insertValuesArray.push(String(value));
                } else {
                    insertValuesArray.push(value);
                }
            } catch (error: any) {
                console.log(
                    "DSQL: Error in parsing data keys =>",
                    error.message
                );
                global.ERROR_CALLBACK?.(
                    `Error parsing Data Keys`,
                    error as Error
                );
                continue;
            }
        }

        insertKeysArray.push("`date_created`");
        insertValuesArray.push(Date());

        insertKeysArray.push("`date_created_code`");
        insertValuesArray.push(Date.now());

        insertKeysArray.push("`date_updated`");
        insertValuesArray.push(Date());

        insertKeysArray.push("`date_updated_code`");
        insertValuesArray.push(Date.now());

        const queryValuesArray = insertValuesArray;

        return { queryValuesArray, insertValuesArray, insertKeysArray };
    }

    if (newData) {
        const { insertKeysArray, insertValuesArray, queryValuesArray } =
            generateQuery(newData);

        const query = `INSERT INTO ${
            isMaster && !dbFullName ? "" : `\`${dbFullName}\`.`
        }\`${tableName}\` (${insertKeysArray.join(
            ","
        )}) VALUES (${insertValuesArray.map(() => "?").join(",")})`;

        const newInsert = await connDbHandler(
            DB_CONN,
            query,
            queryValuesArray,
            debug
        );

        return {
            success: Boolean(newInsert?.insertId),
            payload: newInsert,
            queryObject: {
                sql: query,
                params: queryValuesArray,
            },
        };
    } else if (newBatchData) {
        let batchInsertKeysArray: string[] | undefined;
        let batchInsertValuesArray: any[][] = [];
        let batchQueryValuesArray: any[][] = [];

        for (let i = 0; i < newBatchData.length; i++) {
            const singleBatchData = newBatchData[i];
            const { insertKeysArray, insertValuesArray, queryValuesArray } =
                generateQuery(singleBatchData);

            if (!batchInsertKeysArray) {
                batchInsertKeysArray = insertKeysArray;
            }

            batchInsertValuesArray.push(insertValuesArray);
            batchQueryValuesArray.push(queryValuesArray);
        }

        const query = `INSERT INTO ${
            isMaster && !dbFullName ? "" : `\`${dbFullName}\`.`
        }\`${tableName}\` (${batchInsertKeysArray?.join(
            ","
        )}) VALUES ${batchInsertValuesArray
            .map((vl) => `(${vl.map(() => "?").join(",")})`)
            .join(",")}`;

        console.log("query", query);
        console.log("batchQueryValuesArray", batchQueryValuesArray);

        const newInsert = await connDbHandler(
            DB_CONN,
            query,
            batchQueryValuesArray.flat(),
            debug
        );

        if (debug) {
            debugLog({
                log: newInsert,
                addTime: true,
                label: "newInsert",
            });
        }

        return {
            success: Boolean(newInsert?.insertId),
            payload: newInsert,
            queryObject: {
                sql: query,
                params: batchQueryValuesArray.flat(),
            },
        };
    } else {
        return {
            success: false,
            payload: undefined,
            msg: "No data provided",
        };
    }
}