package model

import (
	"database/sql"
	_ "github.com/mattn/go-sqlite3"
	. "github.com/mickael-kerjean/filestash/server/common"
	"path/filepath"
	"os"
	"time"
)

var DB *sql.DB

func init() {
	cachePath := filepath.Join(GetCurrentDir(), DB_PATH)
	os.MkdirAll(cachePath, os.ModePerm)
	var err error
	if DB, err = sql.Open("sqlite3", cachePath+"/share.sql?_fk=true"); err != nil {
		return
	}

	if stmt, err := DB.Prepare("CREATE TABLE IF NOT EXISTS Location(backend VARCHAR(16), path VARCHAR(512), CONSTRAINT pk_location PRIMARY KEY(backend, path))"); err == nil {
		stmt.Exec()
	}

	if stmt, err := DB.Prepare("CREATE TABLE IF NOT EXISTS Share(id VARCHAR(64) PRIMARY KEY, related_backend VARCHAR(16), related_path VARCHAR(512), params JSON, auth VARCHAR(4093) NOT NULL, FOREIGN KEY (related_backend, related_path) REFERENCES Location(backend, path) ON UPDATE CASCADE ON DELETE CASCADE)"); err == nil {
		stmt.Exec()
	}

	if stmt, err := DB.Prepare("CREATE TABLE IF NOT EXISTS Verification(key VARCHAR(512), code VARCHAR(4), expire DATETIME DEFAULT (datetime('now', '+10 minutes')))"); err == nil {
		stmt.Exec()
		if stmt, err = DB.Prepare("CREATE INDEX idx_verification ON Verification(code, expire)"); err == nil {
			stmt.Exec()
		}
	}

	go func(){
		autovacuum()
	}()
}

func autovacuum() {
	if stmt, err := DB.Prepare("DELETE FROM Verification WHERE expire < datetime('now')"); err == nil {
		stmt.Exec()
	}
	time.Sleep(6 * time.Hour)
}