const mongoose = require("mongoose");

const PointTransactionSchema = new mongoose.Schema(
  {
    user: {
      type: mongoose.Schema.Types.ObjectId,
      ref: "User",
      required: true,
      index: true,
    },
    amount: {
      type: Number,
      required: true,
    },
    type: {
      type: String,
      enum: [
        "street_adoption",
        "task_completion",
        "post_creation",
        "event_participation",
        "reward_redemption",
        "admin_adjustment",
      ],
      required: true,
      index: true,
    },
    description: {
      type: String,
      required: true,
    },
    relatedEntity: {
      entityType: {
        type: String,
        enum: ["Street", "Task", "Post", "Event", "Reward"],
      },
      entityId: {
        type: mongoose.Schema.Types.ObjectId,
      },
    },
    balanceAfter: {
      type: Number,
      required: true,
    },
  },
  {
    timestamps: true,
  },
);

// Compound index for user transaction history queries
PointTransactionSchema.index({ user: 1, createdAt: -1 });

// Index for querying by transaction type
PointTransactionSchema.index({ type: 1, createdAt: -1 });

module.exports = mongoose.model("PointTransaction", PointTransactionSchema);