package mysql

import (
	"context"
	"errors"
	"strings"
	"time"

	"gorm.io/gorm"

	"wucher/internal/domain/health_insurance_companies"
	"wucher/internal/shared/pkg/sortkey"
)

type HealthInsuranceCompaniesRepository struct {
	db *gorm.DB
}

func NewHealthInsuranceCompaniesRepository(db *gorm.DB) *HealthInsuranceCompaniesRepository {
	return &HealthInsuranceCompaniesRepository{db: db}
}

func (r *HealthInsuranceCompaniesRepository) Create(ctx context.Context, row *health_insurance_companies.HealthInsuranceCompany) error {
	requestedIsActive := row.IsActive
	db := r.db.WithContext(ctx)
	if err := db.Create(row).Error; err != nil {
		return err
	}
	return db.Model(&health_insurance_companies.HealthInsuranceCompany{}).Where("id = ?", row.ID).UpdateColumn("is_active", requestedIsActive).Error
}

func (r *HealthInsuranceCompaniesRepository) Update(ctx context.Context, row *health_insurance_companies.HealthInsuranceCompany) error {
	return r.db.WithContext(ctx).Save(row).Error
}

func (r *HealthInsuranceCompaniesRepository) Delete(ctx context.Context, id []byte, deletedBy []byte) error {
	if err := ensureNoReferenceBeforeDelete(ctx, r.db, "health_insurance_companies", id); err != nil {
		return err
	}
	now := time.Now().UTC()
	updates := map[string]any{
		"deleted_at": now,
		"deleted_by": deletedBy,
		"updated_by": deletedBy,
	}
	return mapDeleteConstraintError(r.db.WithContext(ctx).
		Model(&health_insurance_companies.HealthInsuranceCompany{}).
		Where("id = ? AND deleted_at IS NULL", id).
		Updates(updates).Error)
}

func (r *HealthInsuranceCompaniesRepository) GetByID(ctx context.Context, id []byte) (*health_insurance_companies.HealthInsuranceCompany, error) {
	var row health_insurance_companies.HealthInsuranceCompany
	err := r.db.WithContext(ctx).Where("id = ? AND deleted_at IS NULL", id).First(&row).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, nil
	}
	return &row, err
}

func (r *HealthInsuranceCompaniesRepository) List(ctx context.Context, filter, sort string, limit, offset int) ([]health_insurance_companies.HealthInsuranceCompany, int64, error) {
	var rows []health_insurance_companies.HealthInsuranceCompany
	var total int64

	base := r.db.WithContext(ctx).Model(&health_insurance_companies.HealthInsuranceCompany{}).Where("deleted_at IS NULL")
	if filter != "" {
		like := "%" + filter + "%"
		base = base.Where("name LIKE ? OR state LIKE ? OR address LIKE ? OR mobile_number LIKE ? OR email LIKE ? OR note LIKE ?", like, like, like, like, like, like)
	}

	query := base
	if sort != "" {
		query = query.Order(sort)
	} else {
		for _, clause := range sortkey.ActivePositiveSortClauses("health_insurance_companies", "is_active", "sortkey", "name", false) {
			query = query.Order(clause)
		}
	}
	if err := base.Count(&total).Error; err != nil {
		return nil, 0, err
	}
	if limit > 0 {
		query = query.Limit(limit).Offset(offset)
	}
	if err := query.Find(&rows).Error; err != nil {
		return nil, 0, err
	}

	return rows, total, nil
}

func (r *HealthInsuranceCompaniesRepository) ResolveStateDetails(ctx context.Context, stateNames []string) (map[string]health_insurance_companies.StateDetail, error) {
	normalized := make([]string, 0, len(stateNames))
	seen := map[string]struct{}{}
	for _, stateName := range stateNames {
		key := strings.ToLower(strings.TrimSpace(stateName))
		if key == "" {
			continue
		}
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		normalized = append(normalized, key)
	}
	if len(normalized) == 0 {
		return map[string]health_insurance_companies.StateDetail{}, nil
	}

	type row struct {
		LandID         string `gorm:"column:land_id"`
		FederalStateID string `gorm:"column:federal_state_id"`
		FederalState   string `gorm:"column:federal_state"`
		LandName       string `gorm:"column:land_name"`
		LandISOCode    string `gorm:"column:land_iso_code"`
		StateKey       string `gorm:"column:state_key"`
	}

	var rows []row
	err := r.db.WithContext(ctx).
		Table("federal_states").
		Select("LOWER(TRIM(federal_states.name)) AS state_key, LOWER(HEX(lands.id)) AS land_id, LOWER(HEX(federal_states.id)) AS federal_state_id, federal_states.name AS federal_state, lands.name AS land_name, lands.land_iso_code AS land_iso_code").
		Joins("JOIN lands ON lands.id = federal_states.land_id AND lands.deleted_at IS NULL").
		Where("federal_states.deleted_at IS NULL").
		Where("LOWER(TRIM(federal_states.name)) IN ?", normalized).
		Scan(&rows).Error
	if err != nil {
		return nil, err
	}

	out := make(map[string]health_insurance_companies.StateDetail, len(rows))
	for i := range rows {
		if rows[i].StateKey == "" {
			continue
		}
		if _, exists := out[rows[i].StateKey]; exists {
			continue
		}
		out[rows[i].StateKey] = health_insurance_companies.StateDetail{
			LandID:         rows[i].LandID,
			FederalStateID: rows[i].FederalStateID,
			FederalState:   rows[i].FederalState,
			LandName:       rows[i].LandName,
			LandISOCode:    rows[i].LandISOCode,
		}
	}
	return out, nil
}

func (r *HealthInsuranceCompaniesRepository) ResolveLandDetails(ctx context.Context, landIDs []string) (map[string]health_insurance_companies.LandDetail, error) {
	normalized := make([]string, 0, len(landIDs))
	seen := map[string]struct{}{}
	for _, landID := range landIDs {
		key := normalizeLandKey(landID)
		if key == "" {
			continue
		}
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		normalized = append(normalized, key)
	}
	if len(normalized) == 0 {
		return map[string]health_insurance_companies.LandDetail{}, nil
	}

	type row struct {
		LandID      string `gorm:"column:land_id"`
		LandName    string `gorm:"column:land_name"`
		LandISOCode string `gorm:"column:land_iso_code"`
	}

	var rows []row
	err := r.db.WithContext(ctx).
		Table("lands").
		Select("LOWER(HEX(lands.id)) AS land_id, lands.name AS land_name, lands.land_iso_code AS land_iso_code").
		Where("lands.deleted_at IS NULL").
		Where("LOWER(HEX(lands.id)) IN ?", normalized).
		Scan(&rows).Error
	if err != nil {
		return nil, err
	}

	out := make(map[string]health_insurance_companies.LandDetail, len(rows))
	for i := range rows {
		if rows[i].LandID == "" {
			continue
		}
		if _, exists := out[rows[i].LandID]; exists {
			continue
		}
		out[rows[i].LandID] = health_insurance_companies.LandDetail{
			LandID:      rows[i].LandID,
			LandName:    rows[i].LandName,
			LandISOCode: rows[i].LandISOCode,
		}
	}
	return out, nil
}

func normalizeLandKey(raw string) string {
	key := strings.ToLower(strings.TrimSpace(raw))
	key = strings.ReplaceAll(key, "-", "")
	return key
}