import { entityKind, is } from "../entity.js";
import { isPgEnum } from "../pg-core/columns/enum.js";
import { Subquery } from "../subquery.js";
import { tracer } from "../tracing.js";
import { ViewBaseConfig } from "../view-common.js";
import { Column } from "../column.js";
import { IsAlias, Table } from "../table.js";
class FakePrimitiveParam {
  static [entityKind] = "FakePrimitiveParam";
}
function isSQLWrapper(value) {
  return value !== null && value !== void 0 && typeof value.getSQL === "function";
}
function mergeQueries(queries) {
  const result = { sql: "", params: [] };
  for (const query of queries) {
    result.sql += query.sql;
    result.params.push(...query.params);
    if (query.typings?.length) {
      if (!result.typings) {
        result.typings = [];
      }
      result.typings.push(...query.typings);
    }
  }
  return result;
}
class StringChunk {
  static [entityKind] = "StringChunk";
  value;
  constructor(value) {
    this.value = Array.isArray(value) ? value : [value];
  }
  getSQL() {
    return new SQL([this]);
  }
}
class SQL {
  constructor(queryChunks) {
    this.queryChunks = queryChunks;
  }
  static [entityKind] = "SQL";
  /** @internal */
  decoder = noopDecoder;
  shouldInlineParams = false;
  append(query) {
    this.queryChunks.push(...query.queryChunks);
    return this;
  }
  toQuery(config) {
    return tracer.startActiveSpan("drizzle.buildSQL", (span) => {
      const query = this.buildQueryFromSourceParams(this.queryChunks, config);
      span?.setAttributes({
        "drizzle.query.text": query.sql,
        "drizzle.query.params": JSON.stringify(query.params)
      });
      return query;
    });
  }
  buildQueryFromSourceParams(chunks, _config) {
    const config = Object.assign({}, _config, {
      inlineParams: _config.inlineParams || this.shouldInlineParams,
      paramStartIndex: _config.paramStartIndex || { value: 0 }
    });
    const {
      casing,
      escapeName,
      escapeParam,
      prepareTyping,
      inlineParams,
      paramStartIndex
    } = config;
    return mergeQueries(chunks.map((chunk) => {
      if (is(chunk, StringChunk)) {
        return { sql: chunk.value.join(""), params: [] };
      }
      if (is(chunk, Name)) {
        return { sql: escapeName(chunk.value), params: [] };
      }
      if (chunk === void 0) {
        return { sql: "", params: [] };
      }
      if (Array.isArray(chunk)) {
        const result = [new StringChunk("(")];
        for (const [i, p] of chunk.entries()) {
          result.push(p);
          if (i < chunk.length - 1) {
            result.push(new StringChunk(", "));
          }
        }
        result.push(new StringChunk(")"));
        return this.buildQueryFromSourceParams(result, config);
      }
      if (is(chunk, SQL)) {
        return this.buildQueryFromSourceParams(chunk.queryChunks, {
          ...config,
          inlineParams: inlineParams || chunk.shouldInlineParams
        });
      }
      if (is(chunk, Table)) {
        const schemaName = chunk[Table.Symbol.Schema];
        const tableName = chunk[Table.Symbol.Name];
        return {
          sql: schemaName === void 0 ? escapeName(tableName) : escapeName(schemaName) + "." + escapeName(tableName),
          params: []
        };
      }
      if (is(chunk, Column)) {
        const columnName = casing.getColumnCasing(chunk);
        if (_config.invokeSource === "indexes") {
          return { sql: escapeName(columnName), params: [] };
        }
        const schemaName = chunk.table[Table.Symbol.Schema];
        return {
          sql: chunk.table[IsAlias] || schemaName === void 0 ? escapeName(chunk.table[Table.Symbol.Name]) + "." + escapeName(columnName) : escapeName(schemaName) + "." + escapeName(chunk.table[Table.Symbol.Name]) + "." + escapeName(columnName),
          params: []
        };
      }
      if (is(chunk, View)) {
        const schemaName = chunk[ViewBaseConfig].schema;
        const viewName = chunk[ViewBaseConfig].name;
        return {
          sql: schemaName === void 0 ? escapeName(viewName) : escapeName(schemaName) + "." + escapeName(viewName),
          params: []
        };
      }
      if (is(chunk, Param)) {
        if (is(chunk.value, Placeholder)) {
          return { sql: escapeParam(paramStartIndex.value++, chunk), params: [chunk], typings: ["none"] };
        }
        const mappedValue = chunk.value === null ? null : chunk.encoder.mapToDriverValue(chunk.value);
        if (is(mappedValue, SQL)) {
          return this.buildQueryFromSourceParams([mappedValue], config);
        }
        if (inlineParams) {
          return { sql: this.mapInlineParam(mappedValue, config), params: [] };
        }
        let typings = ["none"];
        if (prepareTyping) {
          typings = [prepareTyping(chunk.encoder)];
        }
        return { sql: escapeParam(paramStartIndex.value++, mappedValue), params: [mappedValue], typings };
      }
      if (is(chunk, Placeholder)) {
        return { sql: escapeParam(paramStartIndex.value++, chunk), params: [chunk], typings: ["none"] };
      }
      if (is(chunk, SQL.Aliased) && chunk.fieldAlias !== void 0) {
        return { sql: escapeName(chunk.fieldAlias), params: [] };
      }
      if (is(chunk, Subquery)) {
        if (chunk._.isWith) {
          return { sql: escapeName(chunk._.alias), params: [] };
        }
        return this.buildQueryFromSourceParams([
          new StringChunk("("),
          chunk._.sql,
          new StringChunk(") "),
          new Name(chunk._.alias)
        ], config);
      }
      if (isPgEnum(chunk)) {
        if (chunk.schema) {
          return { sql: escapeName(chunk.schema) + "." + escapeName(chunk.enumName), params: [] };
        }
        return { sql: escapeName(chunk.enumName), params: [] };
      }
      if (isSQLWrapper(chunk)) {
        if (chunk.shouldOmitSQLParens?.()) {
          return this.buildQueryFromSourceParams([chunk.getSQL()], config);
        }
        return this.buildQueryFromSourceParams([
          new StringChunk("("),
          chunk.getSQL(),
          new StringChunk(")")
        ], config);
      }
      if (inlineParams) {
        return { sql: this.mapInlineParam(chunk, config), params: [] };
      }
      return { sql: escapeParam(paramStartIndex.value++, chunk), params: [chunk], typings: ["none"] };
    }));
  }
  mapInlineParam(chunk, { escapeString }) {
    if (chunk === null) {
      return "null";
    }
    if (typeof chunk === "number" || typeof chunk === "boolean") {
      return chunk.toString();
    }
    if (typeof chunk === "string") {
      return escapeString(chunk);
    }
    if (typeof chunk === "object") {
      const mappedValueAsString = chunk.toString();
      if (mappedValueAsString === "[object Object]") {
        return escapeString(JSON.stringify(chunk));
      }
      return escapeString(mappedValueAsString);
    }
    throw new Error("Unexpected param value: " + chunk);
  }
  getSQL() {
    return this;
  }
  as(alias) {
    if (alias === void 0) {
      return this;
    }
    return new SQL.Aliased(this, alias);
  }
  mapWith(decoder) {
    this.decoder = typeof decoder === "function" ? { mapFromDriverValue: decoder } : decoder;
    return this;
  }
  inlineParams() {
    this.shouldInlineParams = true;
    return this;
  }
  /**
   * This method is used to conditionally include a part of the query.
   *
   * @param condition - Condition to check
   * @returns itself if the condition is `true`, otherwise `undefined`
   */
  if(condition) {
    return condition ? this : void 0;
  }
}
class Name {
  constructor(value) {
    this.value = value;
  }
  static [entityKind] = "Name";
  brand;
  getSQL() {
    return new SQL([this]);
  }
}
function name(value) {
  return new Name(value);
}
function isDriverValueEncoder(value) {
  return typeof value === "object" && value !== null && "mapToDriverValue" in value && typeof value.mapToDriverValue === "function";
}
const noopDecoder = {
  mapFromDriverValue: (value) => value
};
const noopEncoder = {
  mapToDriverValue: (value) => value
};
const noopMapper = {
  ...noopDecoder,
  ...noopEncoder
};
class Param {
  /**
   * @param value - Parameter value
   * @param encoder - Encoder to convert the value to a driver parameter
   */
  constructor(value, encoder = noopEncoder) {
    this.value = value;
    this.encoder = encoder;
  }
  static [entityKind] = "Param";
  brand;
  getSQL() {
    return new SQL([this]);
  }
}
function param(value, encoder) {
  return new Param(value, encoder);
}
function sql(strings, ...params) {
  const queryChunks = [];
  if (params.length > 0 || strings.length > 0 && strings[0] !== "") {
    queryChunks.push(new StringChunk(strings[0]));
  }
  for (const [paramIndex, param2] of params.entries()) {
    queryChunks.push(param2, new StringChunk(strings[paramIndex + 1]));
  }
  return new SQL(queryChunks);
}
((sql2) => {
  function empty() {
    return new SQL([]);
  }
  sql2.empty = empty;
  function fromList(list) {
    return new SQL(list);
  }
  sql2.fromList = fromList;
  function raw(str) {
    return new SQL([new StringChunk(str)]);
  }
  sql2.raw = raw;
  function join(chunks, separator) {
    const result = [];
    for (const [i, chunk] of chunks.entries()) {
      if (i > 0 && separator !== void 0) {
        result.push(separator);
      }
      result.push(chunk);
    }
    return new SQL(result);
  }
  sql2.join = join;
  function identifier(value) {
    return new Name(value);
  }
  sql2.identifier = identifier;
  function placeholder2(name2) {
    return new Placeholder(name2);
  }
  sql2.placeholder = placeholder2;
  function param2(value, encoder) {
    return new Param(value, encoder);
  }
  sql2.param = param2;
})(sql || (sql = {}));
((SQL2) => {
  class Aliased {
    constructor(sql2, fieldAlias) {
      this.sql = sql2;
      this.fieldAlias = fieldAlias;
    }
    static [entityKind] = "SQL.Aliased";
    /** @internal */
    isSelectionField = false;
    getSQL() {
      return this.sql;
    }
    /** @internal */
    clone() {
      return new Aliased(this.sql, this.fieldAlias);
    }
  }
  SQL2.Aliased = Aliased;
})(SQL || (SQL = {}));
class Placeholder {
  constructor(name2) {
    this.name = name2;
  }
  static [entityKind] = "Placeholder";
  getSQL() {
    return new SQL([this]);
  }
}
function placeholder(name2) {
  return new Placeholder(name2);
}
function fillPlaceholders(params, values) {
  return params.map((p) => {
    if (is(p, Placeholder)) {
      if (!(p.name in values)) {
        throw new Error(`No value for placeholder "${p.name}" was provided`);
      }
      return values[p.name];
    }
    if (is(p, Param) && is(p.value, Placeholder)) {
      if (!(p.value.name in values)) {
        throw new Error(`No value for placeholder "${p.value.name}" was provided`);
      }
      return p.encoder.mapToDriverValue(values[p.value.name]);
    }
    return p;
  });
}
class View {
  static [entityKind] = "View";
  /** @internal */
  [ViewBaseConfig];
  constructor({ name: name2, schema, selectedFields, query }) {
    this[ViewBaseConfig] = {
      name: name2,
      originalName: name2,
      schema,
      selectedFields,
      query,
      isExisting: !query,
      isAlias: false
    };
  }
  getSQL() {
    return new SQL([this]);
  }
}
Column.prototype.getSQL = function() {
  return new SQL([this]);
};
Table.prototype.getSQL = function() {
  return new SQL([this]);
};
Subquery.prototype.getSQL = function() {
  return new SQL([this]);
};
export {
  FakePrimitiveParam,
  Name,
  Param,
  Placeholder,
  SQL,
  StringChunk,
  View,
  fillPlaceholders,
  isDriverValueEncoder,
  isSQLWrapper,
  name,
  noopDecoder,
  noopEncoder,
  noopMapper,
  param,
  placeholder,
  sql
};
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