export class NativePopup {
    constructor(globalOptions = {}) {
        this.sysInfo = uni.getSystemInfoSync()
        
        // 风格配色
        const { 
            bgColor = '#FFFFFF',
            titleColor = '#1F1F1F',
            contentColor = "#444746", 
            themeColor = '#0b57d0' 
        } = globalOptions

        this.globalStyle = {
            bgColor,
            titleColor,
            contentColor,
            themeColor
        }
    }

    handleClick = (e) => {
        const { clientX, clientY } = e
        // 获取计算好的布局数据
        const { popupTop, popupHeight, popupWidth, btnAreaHeight, padding } = this.layoutData
        const { screenWidth } = this.sysInfo
        
        // 弹窗的左边距（因为是居中，计算左侧空白）
        const popupLeft = (screenWidth - popupWidth) / 2
        
        // 按钮区域的顶部 Y 坐标
        const btnAreaTop = popupTop + popupHeight - btnAreaHeight
        
        // 判断点击是否在按钮行的垂直范围内
        if (clientY >= btnAreaTop && clientY <= (popupTop + popupHeight)) {
            
            // 定义按钮大概的宽度（用于触控区域，稍微放宽一点）
            const btnWidth = 80 
            const rightMargin = padding // 右边距
            
            // 确认按钮区域 (最右侧)
            // 范围：(弹窗右边界 - 按钮宽 - 边距) ~ (弹窗右边界 - 边距)
            const confirmBtnRightX = popupLeft + popupWidth - rightMargin
            const confirmBtnLeftX = confirmBtnRightX - btnWidth
            
            if (clientX >= confirmBtnLeftX && clientX <= (confirmBtnRightX + 10)) {
                this.currentOptions.onConfirm && this.currentOptions.onConfirm()
                this.close()
                return
            }

            // 取消按钮区域 (确认按钮左边)
            // 范围：(确认按钮左边 - 按钮宽) ~ (确认按钮左边)
            const cancelBtnRightX = confirmBtnLeftX
            const cancelBtnLeftX = cancelBtnRightX - btnWidth
            
            if (clientX >= cancelBtnLeftX && clientX <= cancelBtnRightX) {
                this.currentOptions.onCancel && this.currentOptions.onCancel()
                this.close()
                return
            }
        }
    }

    createPopup = () => {
        const { screenWidth, screenHeight } = this.sysInfo
        const { bgColor, titleColor, contentColor, themeColor } = this.globalStyle
        const { title, content, confirmText, cancelText } = this.currentOptions

        // 布局计算
        const popupWidth = Math.min(screenWidth - 48, 320) // 最大宽度320，两侧留空
        const popupHeight = 180 // 固定高度 (如需自适应需复杂计算，这里取经验值)
        const padding = 24 // Material 3 标准内边距
        
        // 垂直居中计算
        const popupTop = (screenHeight - popupHeight) / 2
        const popupLeft = (screenWidth - popupWidth) / 2
        const btnAreaHeight = 50 // 底部按钮区域高度

        // 保存布局数据供 handleClick 使用
        this.layoutData = { popupTop, popupHeight, popupWidth, btnAreaHeight, padding }

        const popupView = new plus.nativeObj.View('popupView', {
            top: 0,
            left: 0,
            width: '100%',
            height: '100%',
        })

        popupView.addEventListener("click", this.handleClick)

        // 1. 绘制全屏半透明蒙层
        popupView.drawRect({
            color: 'rgba(0, 0, 0, 0.4)', 
        }, {
            top: 0,
            left: 0,
            width: '100%',
            height: '100%',
        })

        // 2. 绘制卡片背景
        popupView.drawRect({
            color: bgColor,
            radius: '16px' 
        }, {
            top: `${popupTop}px`,
            left: `${popupLeft}px`,
            width: `${popupWidth}px`,
            height: `${popupHeight}px`,
        })

        // 3. 绘制标题 (更粗，字号 20px)
        popupView.drawText(title, {
            top: `${popupTop + padding}px`,
            left: `${popupLeft + padding}px`,
            width: `${popupWidth - padding * 2}px`,
            height: "30px",
        }, {
            size: "20px",
            weight: "bold", // 这里的bold在部分原生环境可能不明显，依靠字号区分
            align: "left",
            color: titleColor,
        })

        // 4. 绘制内容 (字号 15px，颜色略浅)
        popupView.drawText(content, {
            top: `${popupTop + padding + 35}px`, // 标题下方
            left: `${popupLeft + padding}px`,
            width: `${popupWidth - padding * 2}px`,
            height: "60px",
        }, {
            size: "15px",
            align: "left",
            color: contentColor,
            whiteSpace: 'normal',
            lineSpacing: '20%', // 增加行间距提升阅读体验
        })

        // 5. 绘制按钮 (位于右下角)
        const btnFontSize = "15px"
        const btnWidth = "80px" // 绘制宽度
        
        // 确认按钮
        popupView.drawText(confirmText || '确认', {
            top: `${popupTop + popupHeight - 40}px`, // 底部留些空隙
            left: `${popupLeft + popupWidth - padding - 80}px`, // 右对齐
            width: btnWidth,
            height: '30px'
        }, {
            size: btnFontSize,
            color: themeColor, 
            align: 'right', // 文字右对齐
            weight: 'bold'
        });

        // 取消按钮
        popupView.drawText(cancelText || '取消', {
            top: `${popupTop + popupHeight - 40}px`,
            left: `${popupLeft + popupWidth - padding - 80 - 80 - 10}px`, // 确认按钮左侧，间隔10px
            width: btnWidth,
            height: '30px'
        }, {
            size: btnFontSize,
            color: themeColor, // 取消按钮可以是灰色
            align: 'right'
        });

        this.popupView = popupView
        return popupView
    }

    show = (options = {}) => {
        this.close()
        this.currentOptions = {
            title: '提示',
            content: '',
            confirmText: '确定',
            cancelText: '取消',
            ...options
        }
        this.createPopup()
        this.popupView.show()
    }

    close = () => {
        if (this.popupView) {
            this.popupView.close()
            this.popupView = null
        }
    }
}

export const popup = new NativePopup()