package api

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

// 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,
			SUM(a.count) AS count,
			"0" AS count_unique
		FROM archive a
		LEFT JOIN pages p ON p.id = a.value
		WHERE metric = 'pageviews.page' AND UNIX_TIMESTAMP(a.date) <= ? AND UNIX_TIMESTAMP(a.date) >= ?
		GROUP BY p.path, p.hostname
		ORDER BY count DESC
		LIMIT ?`)

	// 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)
})