package repository

import (
	"context"
	"database/sql"
)

type LayananListParams struct {
	Page    int
	PerPage int
}

type LayananPage struct {
	Items []LayananDepartemen
	Total int
}

type LayananDepartemen struct {
	GroupLayananID      *string `json:"GroupLayananID"`
	Departemen          *string `json:"Departemen"`
	LayananDepartemenID int64   `json:"LayananDepartemenID"`
	LayananID           *string `json:"LayananID"`
	NamaLayanan         *string `json:"NamaLayanan"`
	Harga               *string `json:"Harga"`
}

func (r MySQLLayananRepository) ListLayanan(ctx context.Context, params LayananListParams) (LayananPage, error) {
	var total int
	if err := r.db.QueryRowContext(ctx, `
		SELECT COUNT(*)
		FROM layanandepartemen
		WHERE NA = 'N' AND DepartemenID = 'MCU'
	`).Scan(&total); err != nil {
		return LayananPage{}, err
	}

	rows, err := r.db.QueryContext(ctx, `
		SELECT ld.GroupLayananID, d.Nama, ld.LayananDepartemenID,
			ld.LayananID, ml.Nama, CAST(ld.Harga AS CHAR)
		FROM layanandepartemen ld
		LEFT JOIN departemen d ON d.DepartemenID = ld.DepartemenID
		LEFT JOIN masterlayanan ml ON ml.LayananID = ld.LayananID
		WHERE ld.NA = 'N' AND ld.DepartemenID = 'MCU'
		ORDER BY ld.TanggalBuat DESC
		LIMIT ? OFFSET ?
	`, params.PerPage, (params.Page-1)*params.PerPage)
	if err != nil {
		return LayananPage{}, err
	}
	defer rows.Close()

	items := make([]LayananDepartemen, 0)
	for rows.Next() {
		var item LayananDepartemen
		var groupLayananID, departemen, layananID, namaLayanan, harga sql.NullString
		if err := rows.Scan(&groupLayananID, &departemen, &item.LayananDepartemenID,
			&layananID, &namaLayanan, &harga); err != nil {
			return LayananPage{}, err
		}
		item.GroupLayananID = nullStringPtr(groupLayananID)
		item.Departemen = nullStringPtr(departemen)
		item.LayananID = nullStringPtr(layananID)
		item.NamaLayanan = nullStringPtr(namaLayanan)
		item.Harga = nullStringPtr(harga)
		items = append(items, item)
	}
	if err := rows.Err(); err != nil {
		return LayananPage{}, err
	}
	return LayananPage{Items: items, Total: total}, nil
}