package main

import (
	"github.com/gin-gonic/gin"
	"strconv"
)

func (a *App) adminUserCreditTransactions(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(400, gin.H{"error": "invalid user id"})
		return
	}
	limit := 50
	if n, e := strconv.Atoi(c.DefaultQuery("limit", "50")); e == nil && n > 0 && n <= 200 {
		limit = n
	}
	var txs []CreditTransaction
	q := a.db.Where("user_id = ?", id).Order("id desc").Limit(limit)
	if before := c.Query("before"); before != "" {
		if n, e := strconv.ParseUint(before, 10, 64); e == nil {
			q = q.Where("id < ?", n)
		}
	}
	if err := q.Find(&txs).Error; err != nil {
		c.JSON(500, gin.H{"error": err.Error()})
		return
	}
	type item struct {
		ID            uint        `json:"id"`
		Type          string      `json:"type"`
		Amount        int64       `json:"amount"`
		BalanceAfter  int64       `json:"balanceAfter"`
		ReferenceType string      `json:"referenceType"`
		ReferenceID   string      `json:"referenceId"`
		Reason        string      `json:"reason"`
		CreatedAt     interface{} `json:"createdAt"`
	}
	out := make([]item, 0, len(txs))
	for _, t := range txs {
		out = append(out, item{t.ID, t.Type, t.Amount, t.BalanceAfter, t.ReferenceType, t.ReferenceID, t.Reason, t.CreatedAt})
	}
	next := uint(0)
	if len(txs) == limit {
		next = txs[len(txs)-1].ID
	}
	c.JSON(200, gin.H{"data": out, "nextBefore": next})
}

func (a *App) adminCreditTransactions(c *gin.Context) {
	limit := 100
	if n, e := strconv.Atoi(c.DefaultQuery("limit", "100")); e == nil && n > 0 && n <= 300 {
		limit = n
	}
	var txs []CreditTransaction
	q := a.db.Order("id desc").Limit(limit)
	if uid := c.Query("user_id"); uid != "" {
		if n, e := strconv.ParseUint(uid, 10, 64); e == nil {
			q = q.Where("user_id = ?", n)
		}
	}
	if before := c.Query("before"); before != "" {
		if n, e := strconv.ParseUint(before, 10, 64); e == nil {
			q = q.Where("id < ?", n)
		}
	}
	if err := q.Find(&txs).Error; err != nil {
		c.JSON(500, gin.H{"error": err.Error()})
		return
	}
	type item struct {
		ID            uint        `json:"id"`
		UserID        uint        `json:"userId"`
		Type          string      `json:"type"`
		Amount        int64       `json:"amount"`
		BalanceAfter  int64       `json:"balanceAfter"`
		ReferenceType string      `json:"referenceType"`
		ReferenceID   string      `json:"referenceId"`
		Reason        string      `json:"reason"`
		CreatedAt     interface{} `json:"createdAt"`
	}
	out := make([]item, 0, len(txs))
	for _, t := range txs {
		out = append(out, item{t.ID, t.UserID, t.Type, t.Amount, t.BalanceAfter, t.ReferenceType, t.ReferenceID, t.Reason, t.CreatedAt})
	}
	next := uint(0)
	if len(txs) == limit {
		next = txs[len(txs)-1].ID
	}
	c.JSON(200, gin.H{"data": out, "nextBefore": next})
}