const API = require('../../../lib/API')
const { BaseStdResponse } = require('../../../BaseStdResponse')
const AccessControl = require('../../../lib/AccessControl')
const db = require('../../../plugin/DataBase/db')
const OneBotV11 = require('../../../plugin/OneBot/OneBotV11')
const { ConversationService } = require('../../../lib/AIChat/ConversationService')
const { checkQuota, consumeQuota } = require('../../../lib/AIChat/QuotaService')

class SendMessage extends API {
    constructor() {
        super()
        this.setPath('/AIChat/Message')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        const { uuid, session, conversation_id, content, images = [] } = req.body
        if ([uuid, session].some(v => v === '' || v === null || v === undefined)) {
            return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
        }
        if (!await AccessControl.checkSession(uuid, session)) {
            return res.status(401).json({ ...BaseStdResponse.ACCESS_DENIED })
        }

        const cleanContent = String(content || '').trim()
        const cleanImages = Array.isArray(images) ? images.filter(Boolean) : []
        if (!cleanContent && cleanImages.length === 0) {
            return res.json({ ...BaseStdResponse.MISSING_PARAMETER, msg: '请输入消息或上传图片' })
        }
        if (conversation_id) {
            const rows = await db.query(
                'SELECT channel FROM ai_chat_conversation WHERE id = ? AND create_user = ? AND state = 1 LIMIT 1',
                [conversation_id, uuid]
            )
            if (!rows || rows.length !== 1) return res.json({ ...BaseStdResponse.ERR, msg: '会话不存在或无权发送' })
            if (rows[0].channel === 'wechat') return res.json({ ...BaseStdResponse.ERR, msg: '微信会话仅支持查看，请在微信内继续对话' })
        }

        const quotaCheck = await checkQuota({ uuid, channel: 'web' })
        if (!quotaCheck.allowed) {
            return res.json({ ...BaseStdResponse.ERR, msg: quotaCheck.message || '今日与小妍助理聊天次数已达上限，请明天再试' })
        }

        const saved = await ConversationService.addUserMessage({
            uuid,
            conversationId: conversation_id,
            content: cleanContent,
            images: cleanImages,
            channel: 'web'
        })
        if (!saved) return res.json({ ...BaseStdResponse.ERR, msg: '会话不存在或无权发送' })
        if (saved.missingContent) return res.json({ ...BaseStdResponse.MISSING_PARAMETER, msg: '请输入消息或上传图片' })
        if (saved.readonly) return res.json({ ...BaseStdResponse.ERR, msg: '微信会话仅支持查看，请在微信内继续对话' })

        const quota = await consumeQuota({ uuid, channel: 'web' })
        if (!quota.allowed) {
            await ConversationService.addSystemMessage({
                conversationId: saved.conversationId,
                content: quota.message || '今日与小妍助理聊天次数已达上限，请明天再试',
                status: 'error',
                errorMsg: 'quota exceeded',
                channel: 'web'
            })
            return res.json({ ...BaseStdResponse.ERR, msg: quota.message || '今日与小妍助理聊天次数已达上限，请明天再试' })
        }

        res.json({
            ...BaseStdResponse.OK,
            data: {
                message_id: saved.messageId,
                conversation_id: saved.conversationId,
                conversation_no: saved.conversationNo,
                conversation: saved.conversation,
                message: saved.message,
                quota: {
                    limit: quota.limit,
                    used: quota.used,
                    remaining: quota.remaining,
                    channel: 'web',
                    vip: quota.vip
                }
            }
        })

        try {
            await OneBotV11.sendAiChatMessage({
                conversationId: saved.conversationId,
                conversationNo: saved.conversationNo,
                senderUuid: uuid,
                content: saved.content,
                images: saved.images,
                channel: 'web'
            })
        } catch (err) {
            this.logger.error(`AIChat OneBot forward failed: ${err.stack || err}`)
            await ConversationService.addSystemMessage({
                conversationId: saved.conversationId,
                content: '消息已保存，但暂时无法连接小妍助理，请稍后再试。',
                status: 'error',
                errorMsg: err.message || 'OneBot send failed',
                channel: 'web'
            })
        }
    }
}

module.exports.SendMessage = SendMessage