type AlbumAuthState = 'unknown' | 'granted' | 'denied';

const ALBUM_SCOPE = 'scope.writePhotosAlbum';

Page({
    data: {
        albumAuthState: 'unknown' as AlbumAuthState,
    },

    onLoad() {
        this.refreshAlbumAuthState();
    },

    onShow() {
        this.refreshAlbumAuthState();
    },

    refreshAlbumAuthState() {
        wx.getSetting({
            success: (res) => {
                const auth = res.authSetting?.[ALBUM_SCOPE];
                let state: AlbumAuthState = 'unknown';
                if (auth === true) {
                    state = 'granted';
                } else if (auth === false) {
                    state = 'denied';
                }
                this.setData({ albumAuthState: state });
            },
            fail: () => {
                this.setData({ albumAuthState: 'unknown' });
            },
        });
    },

    onHandleAlbumPerm() {
        const { albumAuthState } = this.data;

        // 已被拒绝过：只能去系统设置打开
        if (albumAuthState === 'denied') {
            wx.openSetting({
                success: (res) => {
                    const granted = !!res.authSetting?.[ALBUM_SCOPE];
                    this.setData({
                        albumAuthState: granted ? 'granted' : 'denied',
                    });
                    if (granted) {
                        wx.showToast({
                            title: '已开启相册权限',
                            icon: 'success',
                            duration: 1500,
                        });
                    }
                },
            });
            return;
        }

        // 未授权过：直接发起授权请求
        wx.authorize({
            scope: ALBUM_SCOPE,
            success: () => {
                this.setData({ albumAuthState: 'granted' });
                wx.showToast({
                    title: '已开启相册权限',
                    icon: 'success',
                    duration: 1500,
                });
            },
            fail: () => {
                this.setData({ albumAuthState: 'denied' });
            },
        });
    },
});