package lib

import (
	"database/sql"
	"log"

	_ "turso.tech/database/tursogo"
)

var DB *sql.DB

// init sqlite db — always creates app.db at project root (run from root)
func InitDB() {
	var err error
	DB, err = sql.Open("turso", "app.db")
	if err != nil {
		log.Fatal(err)
	}

	// make users table
	userTable := `
	CREATE TABLE IF NOT EXISTS users (
		id INTEGER PRIMARY KEY AUTOINCREMENT,
		username TEXT UNIQUE NOT NULL,
		password_hash TEXT NOT NULL
	);`
	_, err = DB.Exec(userTable)
	if err != nil {
		log.Fatal(err)
	}

	// make sessions table
	sessionTable := `
	CREATE TABLE IF NOT EXISTS sessions (
		id TEXT PRIMARY KEY,
		user_id INTEGER NOT NULL,
		expires_at DATETIME NOT NULL,
		FOREIGN KEY(user_id) REFERENCES users(id)
	);`
	_, err = DB.Exec(sessionTable)
	if err != nil {
		log.Fatal(err)
	}

	// make rooms table
	roomTable := `
	CREATE TABLE IF NOT EXISTS rooms (
		id INTEGER PRIMARY KEY AUTOINCREMENT,
		name TEXT NOT NULL,
		code TEXT UNIQUE NOT NULL,
		scale TEXT NOT NULL DEFAULT 'fibonacci',
		owner_id INTEGER NOT NULL,
		created_at DATETIME NOT NULL,
		active_story_id INTEGER,
		FOREIGN KEY(owner_id) REFERENCES users(id)
	);`
	_, err = DB.Exec(roomTable)
	if err != nil {
		log.Fatal(err)
	}

	// make room_members table
	memberTable := `
	CREATE TABLE IF NOT EXISTS room_members (
		room_id INTEGER NOT NULL,
		user_id INTEGER NOT NULL,
		joined_at DATETIME NOT NULL,
		PRIMARY KEY (room_id, user_id),
		FOREIGN KEY(room_id) REFERENCES rooms(id),
		FOREIGN KEY(user_id) REFERENCES users(id)
	);`
	_, err = DB.Exec(memberTable)
	if err != nil {
		log.Fatal(err)
	}

	// make stories table
	storyTable := `
	CREATE TABLE IF NOT EXISTS stories (
		id INTEGER PRIMARY KEY AUTOINCREMENT,
		room_id INTEGER NOT NULL,
		title TEXT NOT NULL,
		points INTEGER,
		voted INTEGER NOT NULL DEFAULT 0,
		FOREIGN KEY(room_id) REFERENCES rooms(id)
	);`
	_, err = DB.Exec(storyTable)
	if err != nil {
		log.Fatal(err)
	}

	// make votes table
	voteTable := `
	CREATE TABLE IF NOT EXISTS votes (
		story_id INTEGER NOT NULL,
		user_id INTEGER NOT NULL,
		value TEXT NOT NULL,
		PRIMARY KEY (story_id, user_id),
		FOREIGN KEY(story_id) REFERENCES stories(id),
		FOREIGN KEY(user_id) REFERENCES users(id)
	);`
	_, err = DB.Exec(voteTable)
	if err != nil {
		log.Fatal(err)
	}
}