package main

import (
	"database/sql"
    "fmt"

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

func openDB(DBName string) (*sql.DB, error) {
    db, err := sql.Open("sqlite3", DBName + ".db")
    if err != nil {
        panic("couldn't open db")
    }

    return db, nil
}

func createTables(db *sql.DB, tableName string) (err error) {
    switch tableName {
        case "music":
            _, err = db.Exec(`CREATE TABLE IF NOT EXISTS music (
                                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                                    external_ids TEXT,
                                    name TEXT NOT NULL,
                                    price FLOAT,
                                    currency TEXT,
                                    seller TEXT,
                                    note TEXT,
                                    purchase_date TEXT);`)
            if err != nil {
                panic(err)
                return err
            }
            return nil
        default:
            panic("wrong table name")
    }
}


func loadCategory(category string) []musicItem {
    db, err := openDB("walletdrain")
    if err != nil {
        panic("couldn't open db")
    }
    defer db.Close()
    
    createTables(db, "music")

    query := fmt.Sprintf("SELECT * FROM %s", category)
    
    rows, err := db.Query(query)
    if err != nil {
        panic(err)
    }
    defer rows.Close()
    
    var results []musicItem
    for rows.Next() {
        var result musicItem
        err := rows.Scan(
            &result.id,
            &result.external_ids,
            &result.name,
            &result.price,
            &result.currency,
            &result.seller,
            &result.note,
            &result.purchase_date)
        if err != nil {
            panic("couldn't scan sql results")
        }
        results = append(results, result)
    }
    return results
}