const express = require("express");
const router = express.Router();
const PeopleInfo = require("../models/peopleInfo");

router.get("/people_info", async (req, res) => {
  try {
    const { searchfield, value } = req.query;

    if (!searchfield || !value) {
      return res.status(400).json({
        message: "searchfield and value parameters are required",
      });
    }

    let matchQuery = {};

    if (searchfield === "mobile") {
      let normalizedSearch = value.replace(/\D/g, "");

      const withLeadingZero = normalizedSearch.startsWith("0")
        ? normalizedSearch
        : `0${normalizedSearch}`;
      const withoutLeadingZero = normalizedSearch.startsWith("0")
        ? normalizedSearch.substring(1)
        : normalizedSearch;

      const numericValue = parseInt(withoutLeadingZero, 10);

      matchQuery = {
        $or: [
          { mobile: withLeadingZero },
          { mobile: withoutLeadingZero },
          { mobile: numericValue },
        ],
      };
    } else if (searchfield === "name") {
      matchQuery = {
        $or: [
          { name: { $regex: value, $options: "i" } },
          { family: { $regex: value, $options: "i" } },
          {
            $expr: {
              $regexMatch: {
                input: { $concat: ["$name", " ", "$family"] },
                regex: value,
                options: "i",
              },
            },
          },
        ],
      };
    } else if (searchfield === "nationalcode") {
      matchQuery = { nationalcode: value };
    } else {
      return res.status(400).json({
        message:
          "Invalid searchfield. Must be 'mobile', 'name', or 'nationalcode'",
      });
    }

    const pipeline = [
      { $match: matchQuery },

      { $limit: 10000 },

      {
        $group: {
          _id: "$nationalcode",
          items: {
            $push: {
              name: "$name",
              family: "$family",
              mobile: "$mobile",
              mellicard: "$mellicard",
              mellatcard: "$mellatcard",
              father: "$father",
              birthdate: "$birthdate",
              info1: "$info1",
              info2: "$info2",
              info3: "$info3",
              info4: "$info4",
              hasMellatcard: {
                $cond: [{ $ne: ["$mellatcard", null] }, true, false],
              },
              hasMellicard: {
                $cond: [{ $ne: ["$mellicard", null] }, true, false],
              },
            },
          },
        },
      },

      {
        $project: {
          nationalcode: "$_id",
          items: 1,

          firstWithMellatcard: {
            $arrayElemAt: [
              {
                $filter: {
                  input: "$items",
                  as: "item",
                  cond: { $eq: ["$$item.hasMellatcard", true] },
                },
              },
              0,
            ],
          },

          firstWithMellicard: {
            $arrayElemAt: [
              {
                $filter: {
                  input: "$items",
                  as: "item",
                  cond: { $eq: ["$$item.hasMellicard", true] },
                },
              },
              0,
            ],
          },

          hasAnyMellatcard: {
            $gt: [
              {
                $size: {
                  $filter: {
                    input: "$items",
                    as: "item",
                    cond: { $eq: ["$$item.hasMellatcard", true] },
                  },
                },
              },
              0,
            ],
          },

          hasAnyMellicard: {
            $gt: [
              {
                $size: {
                  $filter: {
                    input: "$items",
                    as: "item",
                    cond: { $eq: ["$$item.hasMellicard", true] },
                  },
                },
              },
              0,
            ],
          },
        },
      },

      {
        $project: {
          nationalcode: 1,
          name: {
            $cond: [
              { $ne: ["$firstWithMellatcard", null] },
              "$firstWithMellatcard.name",
              {
                $cond: [
                  { $ne: ["$firstWithMellicard", null] },
                  "$firstWithMellicard.name",
                  { $arrayElemAt: ["$items.name", 0] },
                ],
              },
            ],
          },
          family: {
            $cond: [
              { $ne: ["$firstWithMellatcard", null] },
              "$firstWithMellatcard.family",
              {
                $cond: [
                  { $ne: ["$firstWithMellicard", null] },
                  "$firstWithMellicard.family",
                  { $arrayElemAt: ["$items.family", 0] },
                ],
              },
            ],
          },
          father: {
            $cond: [
              { $ne: ["$firstWithMellatcard", null] },
              "$firstWithMellatcard.father",
              {
                $cond: [
                  { $ne: ["$firstWithMellicard", null] },
                  "$firstWithMellicard.father",
                  null,
                ],
              },
            ],
          },
          birthdate: {
            $cond: [
              { $ne: ["$firstWithMellatcard", null] },
              "$firstWithMellatcard.birthdate",
              {
                $cond: [
                  { $ne: ["$firstWithMellicard", null] },
                  "$firstWithMellicard.birthdate",
                  null,
                ],
              },
            ],
          },
          mobile: {
            $filter: {
              input: "$items.mobile",
              as: "mob",
              cond: { $ne: ["$$mob", null] },
            },
          },
          allCards: {
            $reduce: {
              input: "$items",
              initialValue: [],
              in: {
                $concatArrays: [
                  "$$value",
                  {
                    $filter: {
                      input: ["$$this.mellatcard", "$$this.mellicard"],
                      as: "card",
                      cond: { $ne: ["$$card", null] },
                    },
                  },
                ],
              },
            },
          },
          info: {
            $reduce: {
              input: "$items",
              initialValue: [],
              in: {
                $concatArrays: [
                  "$$value",
                  {
                    $filter: {
                      input: [
                        "$$this.info1",
                        "$$this.info2",
                        "$$this.info3",
                        "$$this.info4",
                      ],
                      as: "inf",
                      cond: { $ne: ["$$inf", null] },
                    },
                  },
                ],
              },
            },
          },
        },
      },

      {
        $project: {
          nationalcode: 1,
          name: 1,
          family: 1,
          father: 1,
          birthdate: 1,
          mobile: 1,
          card: "$allCards",
          info: 1,
        },
      },
    ];

    const results = await PeopleInfo.aggregate(pipeline).allowDiskUse(true);

    const processedResults = results.map((result) => {
      const mobileSet = new Set();
      result.mobile.forEach((mob) => {
        if (mob == null) return;
        const mobStr = String(mob);
        const normalized = mobStr.startsWith("0")
          ? mobStr.substring(1)
          : mobStr;
        mobileSet.add(`0${normalized}`);
      });
      result.mobile = Array.from(mobileSet);

      if (result.card) {
        const cardSet = new Set();
        result.card.forEach((card) => {
          if (card && typeof card === "string") {
            cardSet.add(card.trim());
          }
        });
        result.card = Array.from(cardSet);
      }

      if (result.birthdate && result.birthdate instanceof Date) {
        result.birthdate = result.birthdate.toISOString().split("T")[0];
      }

      result.info = result.info.map((inf) => {
        return typeof inf === "string" ? inf.replace(/\t/g, "") : inf;
      });

      return result;
    });

    res.status(200).json({
      data: processedResults,
      count: processedResults.length,
    });
  } catch (error) {
    console.error("Error fetching people info:", error);
    res
      .status(500)
      .json({ message: "Internal Server Error", error: error.message });
  }
});

router.post("/people_info", async (req, res) => {
  try {
    const {
      first_name,
      last_name,
      mobile,
      postal,
      province,
      city,
      nationalcode,
    } = req.body;

    const newPeopleInfo = new PeopleInfo({
      first_name,
      last_name,
      mobile,
      postal,
      province,
      city,
      nationalcode,
    });

    await newPeopleInfo.save();

    res.status(201).json({
      message: "People info created successfully",
      data: newPeopleInfo,
    });
  } catch (error) {
    console.error("Error creating people info:", error);
    res
      .status(500)
      .json({ message: "Internal Server Error", error: error.message });
  }
});

module.exports = router;