import { PartitionKey, PartitionKeyDefinition } from "@azure/cosmos";
import * as DataModels from "../Contracts/DataModels";
import * as ViewModels from "../Contracts/ViewModels";

export function buildDocumentsQuery(
  filter: string,
  partitionKeyProperties: string[],
  partitionKey: DataModels.PartitionKey,
): string {
  let query =
    partitionKeyProperties && partitionKeyProperties.length > 0
      ? `select c.id, c._self, c._rid, c._ts, [${buildDocumentsQueryPartitionProjections(
          "c",
          partitionKey,
        )}] as _partitionKeyValue from c`
      : `select c.id, c._self, c._rid, c._ts from c`;

  if (filter) {
    query += " " + filter;
  }

  return query;
}

export function buildDocumentsQueryPartitionProjections(
  collectionAlias: string,
  partitionKey?: DataModels.PartitionKey,
): string {
  if (!partitionKey) {
    return "";
  }

  // e.g., path /order/id will be projected as c["order"]["id"],
  // to escape any property names that match a keyword
  const projections = [];
  for (const index in partitionKey.paths) {
    // TODO: Handle "/" in partition key definitions
    const projectedProperties: string[] = partitionKey.paths[index].split("/").slice(1);
    let projectedProperty = "";

    projectedProperties.forEach((property: string) => {
      const projection = property.trim();
      if (projection.length > 0 && projection.charAt(0) !== "'" && projection.charAt(0) !== '"') {
        projectedProperty += `["${projection}"]`;
      } else if (projection.length > 0 && projection.charAt(0) === "'") {
        // trim single quotes and escape double quotes
        const projectionSlice = projection.slice(1, projection.length - 1);
        projectedProperty += `["${projectionSlice.replace(/\\"/g, '"').replace(/"/g, '\\\\\\"')}"]`;
      } else {
        projectedProperty += `[${projection}]`;
      }
    });

    projections.push(`${collectionAlias}${projectedProperty}`);
  }

  return projections.join(",");
}

export const queryPagesUntilContentPresent = async (
  firstItemIndex: number,
  queryItems: (itemIndex: number) => Promise<ViewModels.QueryResults>,
): Promise<ViewModels.QueryResults> => {
  let roundTrips = 0;
  let netRequestCharge = 0;
  const doRequest = async (itemIndex: number): Promise<ViewModels.QueryResults> => {
    const results = await queryItems(itemIndex);
    roundTrips = roundTrips + 1;
    results.roundTrips = roundTrips;
    results.requestCharge = Number(results.requestCharge) + netRequestCharge;
    netRequestCharge = Number(results.requestCharge);
    const resultsMetadata = {
      hasMoreResults: results.hasMoreResults,
      itemCount: results.itemCount,
      firstItemIndex: results.firstItemIndex,
      lastItemIndex: results.lastItemIndex,
    };
    if (resultsMetadata.itemCount === 0 && resultsMetadata.hasMoreResults) {
      return await doRequest(resultsMetadata.lastItemIndex);
    }
    return results;
  };

  return await doRequest(firstItemIndex);
};

/* eslint-disable  @typescript-eslint/no-explicit-any */
// export const extractPartitionKeyValues = (
//   documentContent: any,
//   partitionKeyDefinition: PartitionKeyDefinition,
// ): PartitionKey[] => {
//   if (!partitionKeyDefinition.paths || partitionKeyDefinition.paths.length === 0) {
//     return undefined;
//   }

//   const partitionKeyValues: PartitionKey[] = [];
//   partitionKeyDefinition.paths.forEach((partitionKeyPath: string) => {
//     const partitionKeyPathWithoutSlash: string = partitionKeyPath.substring(1);
//     // if (documentContent[partitionKeyPathWithoutSlash]) {
//     //   partitionKeyValues.push(documentContent[partitionKeyPathWithoutSlash]);
//     // }

//     const partitionKeyPathParts: string[] = partitionKeyPathWithoutSlash.split("/");
//     let partitionKeyValue: any = documentContent;

//     for(let partitionKeyPathPartIndex in partitionKeyPathParts) {
//       const partitionKeyPathPart: string = partitionKeyPathParts[partitionKeyPathPartIndex];
//       if (!(partitionKeyPathPart in documentContent)) {
//         partitionKeyValue = {};
//         break;
//       }
//       partitionKeyValue = partitionKeyValue[partitionKeyPathPart];
//     }

//     partitionKeyValues.push(partitionKeyValue);
//   });
//   return partitionKeyValues;
// };

/* eslint-disable  @typescript-eslint/no-explicit-any */
export const extractPartitionKeyValues = (document: any, partitionKeyDefinition: PartitionKeyDefinition): PartitionKey[] => {
  if (partitionKeyDefinition && partitionKeyDefinition.paths && partitionKeyDefinition.paths.length > 0) {
      var partitionKey: any = [];
      partitionKeyDefinition.paths.forEach(function (path) {
        path = path.substring(1);
        const pathParts: string[] = path.split("/");
          
          var obj = document;
          for (var i = 0; i < pathParts.length; ++i) {
              if (!((typeof obj === "object") && (pathParts[i] in obj))) {
                  obj = {};
                  break;
              }
              
              obj = obj[pathParts[i]];
          }
          
          partitionKey.push(obj);
      });
      
      return partitionKey;
  }
  
  return undefined;
}