package db

import (
	"database/sql"
	"fmt"
	"github.com/jmoiron/sqlx"
	"log"
	"os"

	"gitea.deepak.science/deepak/gogmagog/config"
	"gitea.deepak.science/deepak/gogmagog/models"
	"gitea.deepak.science/deepak/gogmagog/util"
	"github.com/golang-migrate/migrate/v4"
	"github.com/golang-migrate/migrate/v4/database/postgres"

	// Blank imports to provide drivers.
	_ "github.com/golang-migrate/migrate/v4/source/file"
	_ "github.com/jackc/pgx/v4/stdlib"
)

type postgresStore struct {
	db *sqlx.DB
}

// GetStore provides a store to back the model based on a postgres connection.
func GetStore(dbConf *config.DBConfig) models.Store {

	if dbConf.Type != "postgres" {
		log.Fatalf("Unsupported database type: " + dbConf.Type)
		os.Exit(1)
	}

	connStr := fmt.Sprintf("user=%s password=%s host=%s port=%s database=%s sslmode=disable",
		dbConf.User,
		dbConf.Password,
		dbConf.Host,
		dbConf.Port,
		dbConf.Database)

	tmp, err := sql.Open("pgx", connStr)
	if err != nil {
		log.Fatal("Could not connect to database: \n", err)
		os.Exit(1)
	}
	db := sqlx.NewDb(tmp, "pgx")
	if err := db.Ping(); err != nil {
		log.Fatal("database ping failed\n", err)
		os.Exit(1)
	}
	driver, err := postgres.WithInstance(tmp, &postgres.Config{})
	if err != nil {
		log.Fatal("Could not create driver for db migration", err)
		os.Exit(1)
	}
	m, err := migrate.NewWithDatabaseInstance("file://db/migrations", "postgres", driver)
	if err != nil {
		log.Fatal("Could not perform migration", err)
		os.Exit(1)
	}
	if err := m.Up(); err != nil && err != migrate.ErrNoChange {
		log.Fatalf("An error occurred while syncing the database.. %v", err)
	}
	db.MapperFunc(util.ToSnake)
	return &postgresStore{db: db}
}

func (store *postgresStore) SelectActions() ([]*models.Action, error) {
	actions := make([]*models.Action, 0)
	err := store.db.Select(&actions, "SELECT action_id, action_description, created_at, updated_at FROM actions")
	if err != nil {
		return nil, err
	}
	return actions, nil
}

func (store *postgresStore) SelectPlans() ([]*models.Plan, error) {
	plans := make([]*models.Plan, 0)
	err := store.db.Select(&plans, "SELECT plan_id, plan_date FROM plans")
	if err != nil {
		return nil, err
	}
	return plans, nil
}