package database

import (
	"database/sql"
	"fmt"

	_ "github.com/mattn/go-sqlite3"
)

var DB *sql.DB

func InitDB(filepath string) (err error) {
	DB, err = sql.Open("sqlite3", filepath)
	if err != nil {
		panic(err)
	}
	if DB == nil {
		panic("DB couldn't be initialized")
	}

	handleError(initObjectTable())
	handleError(initCollectionTable())
	handleError(initActorTable())
	handleError(initUserTable())

	return
}

func initObjectTable() (err error) {
	statement, err := DB.Prepare(`CREATE TABLE IF NOT EXISTS object (
		id TEXT PRIMARY KEY, 
		type TEXT,
		attributedTo TEXT,
		content TEXT,
		published INTEGER,
		toActor TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	return
}

func initCollectionTable() (err error) {
	statement, err := DB.Prepare(`CREATE TABLE IF NOT EXISTS collection (
		id TEXT PRIMARY KEY
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	statement, err = DB.Prepare(`CREATE TABLE IF NOT EXISTS collectionObject (
		collectionId TEXT, 
		objectId TEXT,
		PRIMARY KEY (collectionId, objectId)
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	return
}

func initActorTable() (err error) {
	statement, err := DB.Prepare(`CREATE TABLE IF NOT EXISTS actor (
		id TEXT PRIMARY KEY, 
		type TEXT,
		name TEXT,
		preferredUsername TEXT,
		summary TEXT,
		inbox TEXT,
		outbox TEXT,
		followers TEXT,
		following TEXT,
		liked TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	return
}

func initUserTable() (err error) {
	statement, err := DB.Prepare(`CREATE TABLE IF NOT EXISTS user (
		id TEXT PRIMARY KEY, 
		password TEXT,
		actor TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	statement, err = DB.Prepare(`CREATE TABLE IF NOT EXISTS session (
		token TEXT PRIMARY KEY, 
		userId TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	return
}

func handleError(err error) {
	if err != nil {
		panic(fmt.Sprintf("Could not execute Database Query: %s", err))
	}
}