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 { columnRef, quoteIdentifier, quoteQualified, sqlJoinType, sqlLogicalOperator, } from "./sql-identifier";
export default function sqlGenGenQueryStr(params) {
    let str = "SELECT";
    const genObject = params.genObject;
    const table_name = params.table_name;
    const full_text_match_str = params.full_text_match_str;
    const full_text_search_str = params.full_text_search_str;
    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 tableAlias = countSubQuery.table_alias;
            const countTableRef = quoteQualified(tableAlias || countSubQuery.table);
            let subQStr = `(SELECT COUNT(*)`;
            subQStr += ` FROM ${quoteQualified(countSubQuery.table)}${tableAlias ? ` ${quoteIdentifier(tableAlias)}` : ""}`;
            subQStr += ` WHERE (`;
            for (let j = 0; j < countSubQuery.srcTrgMap.length; j++) {
                const csqSrc = countSubQuery.srcTrgMap[j];
                if (!csqSrc)
                    continue;
                subQStr += ` ${countTableRef}.${quoteIdentifier(csqSrc.src)}`;
                if (typeof csqSrc.trg == "string") {
                    subQStr += ` = ?`;
                    sqlSearhValues.push(csqSrc.trg);
                }
                else if (typeof csqSrc.trg == "object") {
                    subQStr += ` = ${columnRef(csqSrc.trg.field, csqSrc.trg.table)}`;
                }
                if (j < countSubQuery.srcTrgMap.length - 1) {
                    subQStr += ` AND `;
                }
            }
            subQStr += ` )) AS ${quoteIdentifier(countSubQuery.alias)}`;
            countSqls.push(subQStr);
        }
        str += `, ${countSqls.join(",")}`;
    }
    if (genObject?.join) {
        const existingJoinTableNames = [table_name];
        const joinSelects = genObject.join
            .flat()
            .filter((j) => !isUndefined(j))
            .map((joinObj) => {
            const joinTableName = joinObj.alias
                ? joinObj.alias
                : joinObj.tableName;
            const joinTableRef = quoteQualified(joinTableName);
            if (existingJoinTableNames.includes(joinTableRef))
                return null;
            existingJoinTableNames.push(joinTableRef);
            if (joinObj.group_concat) {
                return sqlGenGrabConcatStr({
                    field: columnRef(joinObj.group_concat.field, joinTableName),
                    alias: joinObj.group_concat.alias,
                    separator: joinObj.group_concat.separator,
                });
            }
            else if (joinObj.selectFields) {
                return joinObj.selectFields
                    .map((selectField) => {
                    if (typeof selectField == "string") {
                        return columnRef(selectField, joinTableName);
                    }
                    else if (typeof selectField == "object") {
                        const fieldRef = columnRef(String(selectField.field), joinTableName);
                        let aliasSelectField = fieldRef;
                        if (selectField.count) {
                            aliasSelectField = `COUNT(${fieldRef})`;
                        }
                        else if (selectField.sum) {
                            aliasSelectField = `SUM(${selectField.distinct ? "DISTINCT " : ""}${fieldRef})`;
                        }
                        else if (selectField.average) {
                            aliasSelectField = `AVG(${fieldRef})`;
                        }
                        else if (selectField.max) {
                            aliasSelectField = `MAX(${fieldRef})`;
                        }
                        else if (selectField.min) {
                            aliasSelectField = `MIN(${fieldRef})`;
                        }
                        else if (selectField.group_concat &&
                            selectField.alias) {
                            return sqlGenGrabConcatStr({
                                field: fieldRef,
                                alias: selectField.alias,
                                separator: selectField.group_concat.separator,
                                distinct: selectField.group_concat.distinct,
                            });
                        }
                        else if (selectField.distinct) {
                            aliasSelectField = `DISTINCT ${fieldRef}`;
                        }
                        if (selectField.alias)
                            aliasSelectField += ` AS ${quoteIdentifier(selectField.alias)}`;
                        return aliasSelectField;
                    }
                })
                    .join(",");
            }
            else {
                return `${joinTableRef}.*`;
            }
        })
            .filter((_) => Boolean(_));
        if (joinSelects.length) {
            str += "," + joinSelects.join(",");
        }
    }
    if (genObject?.fullTextSearch &&
        genObject.fullTextSearch.scoreAlias &&
        full_text_match_str &&
        full_text_search_str) {
        str += `, ${full_text_match_str} AS ${quoteIdentifier(genObject.fullTextSearch.scoreAlias)}`;
        sqlSearhValues.push(full_text_search_str);
    }
    str += ` FROM ${table_name}`;
    if (genObject?.join) {
        str +=
            " " +
                genObject.join
                    .flat()
                    .filter((j) => !isUndefined(j))
                    .map((join) => {
                    return (sqlJoinType(join.joinType) +
                        " " +
                        (join.alias
                            ? `${quoteQualified(join.tableName)} ${quoteIdentifier(join.alias)}`
                            : `${quoteQualified(join.tableName)}`) +
                        " ON " +
                        (() => {
                            if (Array.isArray(join.match)) {
                                return ("(" +
                                    join.match
                                        .filter((mtch) => !_.isUndefined(mtch))
                                        .map((mtch) => {
                                        const { str, values } = sqlGenGenJoinStr({
                                            mtch,
                                            join,
                                            table_name,
                                        });
                                        sqlSearhValues.push(...values);
                                        return str;
                                    })
                                        .join(` ${sqlLogicalOperator(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 };
}