const CouchDB = require("../../db")
const Ajv = require("ajv")
const newid = require("../../db/newid")

const ajv = new Ajv()

exports.save = async function(ctx) {
  console.log("THIS INSTANCE", ctx.params.instanceId);
  const db = new CouchDB(ctx.params.instanceId)
  const record = ctx.request.body
  record.modelId = ctx.params.modelId

  if (!record._rev && !record._id) {
    record._id = newid()
  }

  // validation with ajv
  const model = await db.get(record.modelId)
  const validate = ajv.compile({
    properties: model.schema,
  })
  const valid = validate(record)

  if (!valid) {
    ctx.status = 400
    ctx.body = {
      status: 400,
      errors: validate.errors,
    }
    return
  }

  const existingRecord = record._rev && (await db.get(record._id))

  if (existingRecord) {
    const response = await db.put(record)
    record._rev = response.rev
    record.type = "record"
    ctx.body = record
    ctx.status = 200
    ctx.message = `${model.name} updated successfully.`
    return
  }

  record.type = "record"
  const response = await db.post(record)
  record._rev = response.rev
  // ctx.eventPublisher.emit("RECORD_CREATED", record)
  ctx.body = record
  ctx.status = 200
  ctx.message = `${model.name} created successfully`
}

exports.fetchView = async function(ctx) {
  const db = new CouchDB(ctx.params.instanceId)
  const response = await db.query(`database/${ctx.params.viewName}`, {
    include_docs: true,
  })
  ctx.body = response.rows.map(row => row.doc)
}

exports.fetchModel = async function(ctx) {
  const db = new CouchDB(ctx.params.instanceId)
  const response = await db.query(`database/all_${ctx.params.modelId}`, {
    include_docs: true,
  })
  ctx.body = response.rows.map(row => row.doc)
}

exports.find = async function(ctx) {
  const db = new CouchDB(ctx.params.instanceId)
  const record = await db.get(ctx.params.recordId)
  if (record.modelId !== ctx.params.modelId) {
    ctx.throw(400, "Supplied modelId doe not match the record's modelId")
    return
  }
  ctx.body = record
}

exports.destroy = async function(ctx) {
  const db = new CouchDB(ctx.params.instanceId)
  const record = await db.get(ctx.params.recordId)
  if (record.modelId !== ctx.params.modelId) {
    ctx.throw(400, "Supplied modelId doe not match the record's modelId")
    return
  }
  ctx.body = await db.remove(ctx.params.recordId, ctx.params.revId)
}