package repository

import (
	"context"
	"database/sql"
	"fmt"
	"strconv"
)

type PeriodeTarif struct {
	PeriodeTarifID  int64   `json:"PeriodeTarifID"`
	Keterangan      *string `json:"Keterangan"`
	TanggalBerlaku  string  `json:"TanggalBerlaku"`
	TanggalBerakhir string  `json:"TanggalBerakhir"`
}

func (r MySQLLayananRepository) ListPeriodeTarif(ctx context.Context) ([]PeriodeTarif, error) {
	rows, err := r.db.QueryContext(ctx, `
		SELECT PeriodeTarifID, Keterangan,
			CAST(TanggalBerlaku AS CHAR), CAST(TanggalBerakhir AS CHAR)
		FROM periode_tarif
		WHERE NA = 'N'
		ORDER BY Keterangan ASC, PeriodeTarifID ASC
	`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	result := make([]PeriodeTarif, 0)
	for rows.Next() {
		var item PeriodeTarif
		var keterangan sql.NullString
		if err := rows.Scan(&item.PeriodeTarifID, &keterangan,
			&item.TanggalBerlaku, &item.TanggalBerakhir); err != nil {
			return nil, err
		}
		item.Keterangan = nullStringPtr(keterangan)
		result = append(result, item)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return result, nil
}

type PeriodeTarifLayanan struct {
	TarifLayananID      int64   `json:"TarifLayananID"`
	LayananID           *string `json:"LayananID"`
	NamaLayanan         *string `json:"NamaLayanan"`
	LayananDepartemenID int64   `json:"LayananDepartemenID"`
	Departemen          *string `json:"Departemen"`
	Kelas               string  `json:"Kelas"`
	NamaKelas           *string `json:"NamaKelas"`
	Harga               *string `json:"Harga"`
	TipeShare           *string `json:"TipeShare"`
	ShareDokter         *string `json:"ShareDokter"`
	ShareRS             *string `json:"ShareRS"`
	ShareExternal       *string `json:"ShareExternal"`
	ShareLain           *string `json:"ShareLain"`
}

type PeriodeTarifLayananListParams struct {
	PeriodeTarifID int64
	Page           int
	PerPage        int
	Search         string
}

type PeriodeTarifLayananPage struct {
	Items []PeriodeTarifLayanan
	Total int
}

func (r MySQLLayananRepository) ListPeriodeTarifLayanan(ctx context.Context, params PeriodeTarifLayananListParams) (PeriodeTarifLayananPage, error) {
	tableName := "harga_layanan_" + strconv.FormatInt(params.PeriodeTarifID, 10)
	exists, err := r.tableExists(ctx, tableName)
	if err != nil {
		return PeriodeTarifLayananPage{}, err
	}
	if !exists {
		return PeriodeTarifLayananPage{}, ErrTarifTableNotFound
	}

	where := `
		WHERE tarif.NA = 'N'
			AND layanan_dept.NA = 'N'`
	args := make([]any, 0, 4)
	if params.Search != "" {
		where += `
			AND (layanan_dept.LayananID LIKE ? OR layanan.Nama LIKE ?)`
		like := "%" + params.Search + "%"
		args = append(args, like, like)
	}

	countQuery := fmt.Sprintf(`
		SELECT COUNT(*)
		FROM %s AS tarif
		INNER JOIN layanandepartemen AS layanan_dept
			ON layanan_dept.LayananDepartemenID = tarif.LayananDepartemenID
		LEFT JOIN masterlayanan AS layanan
			ON layanan.LayananID = layanan_dept.LayananID
		%s
	`, tableName, where)
	var total int
	if err := r.db.QueryRowContext(ctx, countQuery, args...).Scan(&total); err != nil {
		return PeriodeTarifLayananPage{}, err
	}

	query := fmt.Sprintf(`
		SELECT
			tarif.HargaLayananID,
			layanan_dept.LayananID,
			layanan.Nama,
			tarif.LayananDepartemenID,
			departemen.Nama,
			tarif.KelasID,
			kelas.Nama,
			CAST(tarif.Harga AS CHAR),
			tarif.ShareTipe,
			CAST(tarif.ShareDokter AS CHAR),
			CAST(tarif.ShareRS AS CHAR),
			CAST(tarif.ShareExternal AS CHAR),
			CAST(tarif.ShareLain AS CHAR)
		FROM %s AS tarif
		INNER JOIN layanandepartemen AS layanan_dept
			ON layanan_dept.LayananDepartemenID = tarif.LayananDepartemenID
		LEFT JOIN masterlayanan AS layanan
			ON layanan.LayananID = layanan_dept.LayananID
		LEFT JOIN departemen AS departemen
			ON departemen.DepartemenID = layanan_dept.DepartemenID
		LEFT JOIN kelas AS kelas
			ON kelas.KelasID = tarif.KelasID
		%s
		ORDER BY layanan.Nama, layanan_dept.LayananID, tarif.KelasID, tarif.HargaLayananID
		LIMIT ? OFFSET ?
	`, tableName, where)
	args = append(args, params.PerPage, (params.Page-1)*params.PerPage)

	rows, err := r.db.QueryContext(ctx, query, args...)
	if err != nil {
		return PeriodeTarifLayananPage{}, err
	}
	defer rows.Close()

	result := make([]PeriodeTarifLayanan, 0)
	for rows.Next() {
		var item PeriodeTarifLayanan
		var layananID, namaLayanan, departemen, namaKelas, harga sql.NullString
		var tipeShare, shareDokter, shareRS, shareExternal, shareLain sql.NullString
		if err := rows.Scan(
			&item.TarifLayananID, &layananID, &namaLayanan,
			&item.LayananDepartemenID, &departemen, &item.Kelas, &namaKelas,
			&harga, &tipeShare, &shareDokter, &shareRS, &shareExternal, &shareLain,
		); err != nil {
			return PeriodeTarifLayananPage{}, err
		}
		item.LayananID = nullStringPtr(layananID)
		item.NamaLayanan = nullStringPtr(namaLayanan)
		item.Departemen = nullStringPtr(departemen)
		item.NamaKelas = nullStringPtr(namaKelas)
		item.Harga = nullStringPtr(harga)
		item.TipeShare = nullStringPtr(tipeShare)
		item.ShareDokter = nullStringPtr(shareDokter)
		item.ShareRS = nullStringPtr(shareRS)
		item.ShareExternal = nullStringPtr(shareExternal)
		item.ShareLain = nullStringPtr(shareLain)
		result = append(result, item)
	}
	if err := rows.Err(); err != nil {
		return PeriodeTarifLayananPage{}, err
	}

	return PeriodeTarifLayananPage{Items: result, Total: total}, nil
}