// Copyright (c) 2025 Tethys Plex
//
// This file is part of Veloera.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package controller

import (
	"github.com/gin-gonic/gin"
	"veloera/common"
	"veloera/dto"
	"veloera/model"
)

func GetSubscription(c *gin.Context) {
	var remainQuota int
	var usedQuota int
	var err error
	var token *model.Token
	var expiredTime int64
	if common.DisplayTokenStatEnabled {
		tokenId := c.GetInt("token_id")
		token, err = model.GetTokenById(tokenId)
		expiredTime = token.ExpiredTime
		remainQuota = token.RemainQuota
		usedQuota = token.UsedQuota
	} else {
		userId := c.GetInt("id")
		remainQuota, err = model.GetUserQuota(userId, false)
		usedQuota, err = model.GetUserUsedQuota(userId)
	}
	if expiredTime <= 0 {
		expiredTime = 0
	}
	if err != nil {
		openAIError := dto.OpenAIError{
			Message: err.Error(),
			Type:    "upstream_error",
		}
		c.JSON(200, gin.H{
			"error": openAIError,
		})
		return
	}
	quota := remainQuota + usedQuota
	amount := float64(quota)
	if common.DisplayInCurrencyEnabled {
		amount /= common.QuotaPerUnit
	}
	if token != nil && token.UnlimitedQuota {
		amount = 100000000
	}
	subscription := OpenAISubscriptionResponse{
		Object:             "billing_subscription",
		HasPaymentMethod:   true,
		SoftLimitUSD:       amount,
		HardLimitUSD:       amount,
		SystemHardLimitUSD: amount,
		AccessUntil:        expiredTime,
	}
	c.JSON(200, subscription)
	return
}

func GetUsage(c *gin.Context) {
	var quota int
	var err error
	var token *model.Token
	if common.DisplayTokenStatEnabled {
		tokenId := c.GetInt("token_id")
		token, err = model.GetTokenById(tokenId)
		quota = token.UsedQuota
	} else {
		userId := c.GetInt("id")
		quota, err = model.GetUserUsedQuota(userId)
	}
	if err != nil {
		openAIError := dto.OpenAIError{
			Message: err.Error(),
			Type:    "veloera_error",
		}
		c.JSON(200, gin.H{
			"error": openAIError,
		})
		return
	}
	amount := float64(quota)
	if common.DisplayInCurrencyEnabled {
		amount /= common.QuotaPerUnit
	}
	usage := OpenAIUsageResponse{
		Object:     "list",
		TotalUsage: amount * 100,
	}
	c.JSON(200, usage)
	return
}