import { isUndefined } from "lodash";
import sqlGenGrabConcatStr from "./sql-generator-grab-concat-str";
import sqlGenGenJoinStr from "./sql-generator-gen-join-str";
import sqlGenGrabSelectFieldSQL from "./sql-generator-grab-select-field-sql";
import { sqlName, sqlJoinType, sqlOperator } from "./sql-safe";
export default function sqlGenGenQueryStr(params) {
    let str = "SELECT";
    const genObject = params.genObject;
    const table_name = params.table_name;
    let sqlSearhValues = [];
    if (genObject?.select_sql) {
        str += ` ${genObject.select_sql}`;
    }
    else if (genObject?.selectFields?.[0]) {
        if (genObject.join) {
            str += sqlGenGrabSelectFieldSQL({
                selectFields: genObject.selectFields,
                append_table_names: true,
                table_name,
            });
        }
        else {
            str += sqlGenGrabSelectFieldSQL({
                selectFields: genObject.selectFields,
                table_name,
            });
        }
    }
    else {
        if (genObject?.join) {
            str += ` ${table_name}.*`;
        }
        else {
            str += " *";
        }
    }
    if (genObject?.countSubQueries) {
        let countSqls = [];
        for (let i = 0; i < genObject.countSubQueries.length; i++) {
            const countSubQuery = genObject.countSubQueries[i];
            if (!countSubQuery)
                continue;
            const countTable = sqlName(countSubQuery.table, "table name");
            const tableAlias = countSubQuery.table_alias
                ? sqlName(countSubQuery.table_alias, "alias")
                : undefined;
            let subQStr = `(SELECT COUNT(*)`;
            subQStr += ` FROM ${countTable}${tableAlias ? ` ${tableAlias}` : ""}`;
            subQStr += ` WHERE (`;
            for (let j = 0; j < countSubQuery.srcTrgMap.length; j++) {
                const csqSrc = countSubQuery.srcTrgMap[j];
                if (!csqSrc)
                    continue;
                subQStr += ` ${tableAlias || countTable}.${sqlName(csqSrc.src, "field name")}`;
                if (typeof csqSrc.trg == "string") {
                    subQStr += ` = ?`;
                    sqlSearhValues.push(csqSrc.trg);
                }
                else if (typeof csqSrc.trg == "object") {
                    subQStr += ` = ${sqlName(csqSrc.trg.table, "table name")}.${sqlName(csqSrc.trg.field, "field name")}`;
                }
                if (j < countSubQuery.srcTrgMap.length - 1) {
                    subQStr += ` AND `;
                }
            }
            subQStr += ` )) AS ${sqlName(countSubQuery.alias, "alias")}`;
            countSqls.push(subQStr);
        }
        str += `, ${countSqls.join(",")}`;
    }
    if (genObject?.join) {
        const existingJoinTableNames = [table_name];
        const joinSelectStr = genObject.join
            .flat()
            .filter((j) => !isUndefined(j))
            .map((joinObj) => {
            const joinTableName = sqlName(joinObj.alias ? joinObj.alias : joinObj.tableName, "join table name");
            if (existingJoinTableNames.includes(joinTableName))
                return null;
            existingJoinTableNames.push(joinTableName);
            if (joinObj.group_concat) {
                return sqlGenGrabConcatStr({
                    field: `${joinTableName}.${sqlName(joinObj.group_concat.field, "field name")}`,
                    alias: joinObj.group_concat.alias,
                    separator: joinObj.group_concat.separator,
                    distinct: joinObj.group_concat.distinct,
                });
            }
            else if (joinObj.selectFields) {
                return joinObj.selectFields
                    .map((selectField) => {
                    if (typeof selectField != "object") {
                        return `${joinTableName}.${sqlName(selectField, "field name")}`;
                    }
                    const field = `${joinTableName}.${sqlName(selectField.field, "field name")}`;
                    if (selectField.group_concat &&
                        selectField.alias) {
                        return sqlGenGrabConcatStr({
                            field,
                            alias: selectField.alias,
                            separator: selectField.group_concat.separator,
                            distinct: selectField.group_concat.distinct,
                        });
                    }
                    let aliasSelectField = field;
                    if (selectField.count) {
                        aliasSelectField = `COUNT(${field})`;
                    }
                    else if (selectField.sum) {
                        aliasSelectField = `SUM(${selectField.distinct ? "DISTINCT " : ""}${field})`;
                    }
                    else if (selectField.average) {
                        aliasSelectField = `AVG(${field})`;
                    }
                    else if (selectField.max) {
                        aliasSelectField = `MAX(${field})`;
                    }
                    else if (selectField.min) {
                        aliasSelectField = `MIN(${field})`;
                    }
                    else if (selectField.distinct) {
                        aliasSelectField = `DISTINCT ${field}`;
                    }
                    if (selectField.alias)
                        aliasSelectField += ` AS ${sqlName(selectField.alias, "alias")}`;
                    return aliasSelectField;
                })
                    .join(",");
            }
            else {
                return `${joinTableName}.*`;
            }
        })
            .filter((_) => Boolean(_))
            .join(",");
        if (joinSelectStr) {
            str += "," + joinSelectStr;
        }
    }
    str += ` FROM ${table_name}`;
    if (genObject?.join) {
        str +=
            " " +
                genObject.join
                    .flat()
                    .filter((j) => !isUndefined(j))
                    .map((join) => {
                    const joinTable = sqlName(join.tableName, "table name");
                    return (sqlJoinType(join.joinType) +
                        " " +
                        (join.alias
                            ? `${joinTable} ${sqlName(join.alias, "alias")}`
                            : joinTable) +
                        " ON " +
                        (() => {
                            if (Array.isArray(join.match)) {
                                return ("(" +
                                    join.match
                                        .map((mtch) => {
                                        const { str, values } = sqlGenGenJoinStr({
                                            mtch,
                                            join,
                                            table_name,
                                        });
                                        sqlSearhValues.push(...values);
                                        return str;
                                    })
                                        .join(` ${sqlOperator(join.operator)} `) +
                                    ")");
                            }
                            else if (typeof join.match == "object") {
                                const { str, values } = sqlGenGenJoinStr({
                                    mtch: join.match,
                                    join,
                                    table_name,
                                });
                                sqlSearhValues.push(...values);
                                return str;
                            }
                        })());
                })
                    .join(" ");
    }
    return { str, values: sqlSearhValues };
}