package storage

import (
	"fmt"
	"strconv"
	"strings"
	"time"

	"github.com/shopspring/decimal"
	"go.mongodb.org/mongo-driver/v2/bson"

	"dashboard-cdc-worker/internal/dashboard"
)

func mergeMongoGiftRows(rows map[string]*giftMetricRow, metrics []mongoGiftAmount, anchorShare bool) {
	for _, item := range metrics {
		key := giftMetricKey(item.day, "", item.userID)
		row := rows[key]
		if row == nil {
			row = &giftMetricRow{day: item.day, luckyGiftUsers: make(map[int64]struct{})}
			rows[key] = row
		}
		if anchorShare {
			row.luckyGiftAnchorShare = row.luckyGiftAnchorShare.Add(item.amount)
		} else {
			row.giftConsume = row.giftConsume.Add(item.amount)
		}
	}
}

func mergeSQLLuckyGiftRows(rows map[string]*giftMetricRow, metrics []sqlLuckyGiftRow) {
	for _, item := range metrics {
		key := giftMetricKey(item.day, item.country.Code, 0)
		row := rows[key]
		if row == nil {
			row = &giftMetricRow{
				day:            item.day,
				sysOrigin:      item.sysOrigin,
				country:        item.country,
				luckyGiftUsers: make(map[int64]struct{}),
			}
			rows[key] = row
		}
		row.sysOrigin = item.sysOrigin
		row.country = item.country
		row.luckyGiftTotalFlow = row.luckyGiftTotalFlow.Add(item.payAmount)
		row.luckyGiftPayout = row.luckyGiftPayout.Add(item.payout)
		row.luckyGiftUsers[item.userID] = struct{}{}
	}
}

func applyGiftUserCountries(rows map[string]*giftMetricRow, users map[int64]dashboard.UserCountry, unknownCountry string) {
	for key, row := range rows {
		if row.country.Code != "" {
			continue
		}
		parts := strings.Split(key, "|")
		if len(parts) != 3 {
			continue
		}
		userID := parseInt64(parts[2])
		user, ok := users[userID]
		if !ok {
			delete(rows, key)
			continue
		}
		row.sysOrigin = user.SysOrigin
		row.country = user.Country
		countryKey := giftMetricKey(row.day, row.country.Code, 0)
		countryRow := rows[countryKey]
		if countryRow == nil {
			countryRow = &giftMetricRow{
				day:            row.day,
				sysOrigin:      row.sysOrigin,
				country:        row.country,
				luckyGiftUsers: make(map[int64]struct{}),
			}
			rows[countryKey] = countryRow
		}
		countryRow.giftConsume = countryRow.giftConsume.Add(row.giftConsume)
		countryRow.luckyGiftAnchorShare = countryRow.luckyGiftAnchorShare.Add(row.luckyGiftAnchorShare)
		delete(rows, key)
	}
}

func (row *giftMetricRow) empty() bool {
	return row.giftConsume.IsZero() &&
		row.luckyGiftAnchorShare.IsZero() &&
		row.luckyGiftTotalFlow.IsZero() &&
		row.luckyGiftPayout.IsZero() &&
		len(row.luckyGiftUsers) == 0
}

func giftMetricKey(day, countryCode string, userID int64) string {
	return fmt.Sprintf("%s|%s|%d", day, countryCode, userID)
}

func int64SetToSlice(values map[int64]struct{}) []int64 {
	out := make([]int64, 0, len(values))
	for value := range values {
		out = append(out, value)
	}
	return out
}

func bsonInt64(value interface{}) int64 {
	switch typed := value.(type) {
	case int64:
		return typed
	case int32:
		return int64(typed)
	case int:
		return int64(typed)
	case float64:
		return int64(typed)
	case string:
		return parseInt64(typed)
	default:
		return parseInt64(fmt.Sprint(typed))
	}
}

func bsonDecimal(value interface{}) decimal.Decimal {
	switch typed := value.(type) {
	case decimal.Decimal:
		return typed
	case bson.Decimal128:
		parsed, err := decimal.NewFromString(typed.String())
		if err == nil {
			return parsed
		}
	case int64:
		return decimal.NewFromInt(typed)
	case int32:
		return decimal.NewFromInt(int64(typed))
	case int:
		return decimal.NewFromInt(int64(typed))
	case float64:
		return decimal.NewFromFloat(typed)
	case string:
		parsed, err := decimal.NewFromString(typed)
		if err == nil {
			return parsed
		}
	}
	parsed, err := decimal.NewFromString(fmt.Sprint(value))
	if err != nil {
		return decimal.Zero
	}
	return parsed
}

func parseInt64(value string) int64 {
	parsed, _ := strconv.ParseInt(strings.TrimSpace(value), 10, 64)
	return parsed
}

func defaultSysOrigin(values []string) string {
	if len(values) == 0 {
		return ""
	}
	return strings.TrimSpace(values[0])
}

func timezoneOffset(timezone string) string {
	location, err := time.LoadLocation(timezone)
	if err != nil {
		return "+00:00"
	}
	_, offset := time.Now().In(location).Zone()
	sign := "+"
	if offset < 0 {
		sign = "-"
		offset = -offset
	}
	hours := offset / 3600
	minutes := (offset % 3600) / 60
	return fmt.Sprintf("%s%02d:%02d", sign, hours, minutes)
}

func quoteIdent(value string) string {
	return "`" + strings.ReplaceAll(value, "`", "``") + "`"
}