package sql

import (
	"context"

	"emperror.dev/errors"
	"git.sleepycat.moe/sam/mercury/internal/database"
	"github.com/keegancsmith/sqlf"
)

// ConfigStore is the interface to configs in the database.
type ConfigStore struct {
	q Querier
}

// NewConfigStore creates a new ConfigStore instance.
func NewConfigStore(q Querier) *ConfigStore {
	return &ConfigStore{q: q}
}

func (s *ConfigStore) initConfig(ctx context.Context) error {
	q := sqlf.Sprintf(`INSERT INTO config
	(id, name)
	VALUES (1, %s)
	ON CONFLICT (id) DO NOTHING`, database.DefaultConfig.Name)

	err := Exec(ctx, s.q, q)
	return errors.Wrap(err, "executing query")
}

func (s *ConfigStore) Get(ctx context.Context) (database.Config, error) {
	q := sqlf.Sprintf("SELECT * FROM config WHERE id = 1")

	return Get[database.Config](ctx, s.q, q)
}

func (s *ConfigStore) Set(ctx context.Context, cur, new database.Config) (database.Config, error) {
	q := sqlf.Sprintf("UPDATE config SET")
	if cur.Name != new.Name {
		q = sqlf.Sprintf("%v name = %v,", q, new.Name)
	}
	if cur.AdminID != new.AdminID {
		q = sqlf.Sprintf("%v admin_id = %v,", q, new.AdminID)
	}
	if cur.InternalApplication != new.InternalApplication {
		q = sqlf.Sprintf("%v internal_application = %v,", q, new.InternalApplication)
	}
	if cur.PostCharacterLimit != new.PostCharacterLimit {
		q = sqlf.Sprintf("%v post_character_limit = %v,", q, new.PostCharacterLimit)
	}
	q = sqlf.Sprintf("%v id = %v WHERE id = %v RETURNING *", q, cur.ID, cur.ID)

	return Get[database.Config](ctx, s.q, q)
}