package api

import (
  "net/http"
  "encoding/json"
  "github.com/dannyvankooten/ana/models"
  "github.com/dannyvankooten/ana/db"
  "github.com/dannyvankooten/ana/count"
)

// URL: /api/pageviews
var GetPageviewsHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  before, after := getRequestedPeriods(r)
  stmt, err := db.Conn.Prepare(`SELECT
      p.hostname,
      p.path,
      COUNT(*) AS pageviews,
      COUNT(DISTINCT(pv.visitor_id)) AS pageviews_unique
    FROM pageviews pv
    LEFT JOIN pages p ON pv.page_id = p.id
    WHERE UNIX_TIMESTAMP(pv.timestamp) <= ? AND UNIX_TIMESTAMP(pv.timestamp) >= ?
    GROUP BY p.path, p.hostname
    ORDER BY pageviews DESC
    LIMIT ?`)
  checkError(err)
  defer stmt.Close()

  rows, err := stmt.Query(before, after, defaultLimit)
  checkError(err)
  defer rows.Close()

  results := make([]models.Pageviews, 0)
  for rows.Next() {
    var p models.Pageviews
    err = rows.Scan(&p.Hostname, &p.Path, &p.Count, &p.CountUnique);
    checkError(err)
    results = append(results, p)
  }

  err = rows.Err();
  checkError(err)

  w.Header().Set("Content-Type", "application/json")
  json.NewEncoder(w).Encode(results)
})


// URL: /api/pageviews/count
var GetPageviewsCountHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  before, after := getRequestedPeriods(r)
  result := count.Pageviews(before, after)
  w.Header().Set("Content-Type", "application/json")
  json.NewEncoder(w).Encode(result)
})

// URL: /api/pageviews/group/day
var GetPageviewsPeriodCountHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
  before, after := getRequestedPeriods(r)
  results := count.PageviewsPerDay(before, after)
  w.Header().Set("Content-Type", "application/json")
  json.NewEncoder(w).Encode(results)
})