package main

import (
	"log"

	"github.com/ncruces/go-sqlite3"
	_ "github.com/ncruces/go-sqlite3/embed"
)

const memory = ":memory:"

func main() {
	db, err := sqlite3.Open(memory)
	if err != nil {
		log.Fatal(err)
	}

	/* Not necessary because I am currently saving the db in memory
	sqlstmt := `
		DROP TABLE IF EXISTS artists;
		DROP TABLE IF EXISTS websites;
		DROP TABLE IF EXISTS links;
	`
	err = db.Exec(sqlstmt)
	if err != nil {
		log.Fatal(err)
	}
	*/

	sqlstmt := `
	CREATE TABLE IF NOT EXISTS artists (
		id integer NOT NULL CONSTRAINT artists_pk PRIMARY KEY AUTOINCREMENT,
		name text NOT NULL
	);
	CREATE TABLE IF NOT EXISTS websites (
		id integer NOT NULL CONSTRAINT websites_pk PRIMARY KEY AUTOINCREMENT,
		name text NOT NULL
	);
	CREATE TABLE IF NOT EXISTS links (
		id integer NOT NULL CONSTRAINT links_pk PRIMARY KEY AUTOINCREMENT,
		url text NOT NULL,
		websites_id integer NOT NULL,
		artists_id integer NOT NULL,
		CONSTRAINT links_artists FOREIGN KEY (artists_id)
		REFERENCES artists (id),
		CONSTRAINT links_websites FOREIGN KEY (websites_id)
		REFERENCES websites (id)
	);
	`
	err = db.Exec(sqlstmt)
	if err != nil {
		log.Fatal(err)
	}

	/*
	err = db.Exec(`INSERT INTO users (id, name) VALUES (0, 'go'), (1, 'zig'), (2, 'whatever')`)
	if err != nil {
		log.Fatal(err)
	}
	*/

	sqlstmt = `
		SELECT name
		FROM sqlite_schema
		WHERE type ='table' AND name NOT LIKE 'sqlite_%';
	`

	stmt, _, err := db.Prepare(sqlstmt)
	if err != nil {
		log.Fatal(err)
	}
	defer stmt.Close()

	for stmt.Step() {
		log.Println("created table:", stmt.ColumnText(0))
	}
	if err := stmt.Err(); err != nil {
		log.Fatal(err)
	}

	err = stmt.Close()
	if err != nil {
		log.Fatal(err)
	}

	err = db.Close()
	if err != nil {
		log.Fatal(err)
	}
}