package main

import (
	"database/sql"
	_ "github.com/mattn/go-sqlite3"
	"log"
)

var db *sql.DB

func initDB() {
	var err error
	db, err = sql.Open("sqlite3", "./database.db")
	if err != nil {
		log.Fatal(err)
	}

	createTables := `
CREATE TABLE IF NOT EXISTS hosts
(
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     public_name TEXT NOT NULL,
     private_name TEXT NOT NULL,
     policy TEXT NOT NULL,
     endpoint TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS configuration
(
    name  TEXT PRIMARY KEY,
    value TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS results
(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
    host_id INTEGER NOT NULL,
    success_percentage REAL NOT NULL,
    response_time REAL NOT NULL,
    FOREIGN KEY (host_id) REFERENCES hosts(id)
);

INSERT OR IGNORE INTO configuration (name, value) VALUES ('interval_seconds', 60);
INSERT OR IGNORE INTO configuration (name, value) VALUES ('retry_attempts', 3);
INSERT OR IGNORE INTO configuration (name, value) VALUES ('timeout_seconds', 5);
`
	_, err = db.Exec(createTables)
	if err != nil {
		log.Fatal(err)
	}
}