/* ui/login.c — 扫码登录页（ACT_LOGIN，根页）。
 *
 * 流程：进入即起后台 worker（login_worker）：
 *   unikey(eapi) → 本地二维码矩阵(qrcodegen) → 轮询(801/802/803) → 803 捕获 set-cookie 加密落盘
 *   → login_status 拿 uid/nickname → 置 g_login_done。
 * UI 线程只在 tick 读 g_st.qr 状态与 login_state 重绘并检查 g_login_done → 切入 home。
 * 800(过期)自动刷新二维码。UI 不卡：网络全在 worker 线程。
 */
#include "../ncm_app_internal.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>

static pthread_t   g_thread;
static volatile int g_polling;   /* worker 运行中 */
static volatile int g_done;      /* 登录成功（UI tick 切入 home） */
static volatile int g_err;       /* 最后一次错误（网络不可达等） */
static int          g_active;

static int        g_custom_id;   /* 绘制物 */
static ncm_rect_t r_scr;          /* 整屏（沉浸式，hero 从 y=0 起） */

/* ---- 绘制 ---- */
static void login_draw(void *ctx)
{
    (void)ctx;
    if (meow_ui_activity_active() != ACT_LOGIN) return;
    const meow_theme *th = meow_theme_get();
    const ncm_pal_t *pa  = ncm_palette(g_dark);
    int W = meow_ui_width(), H = meow_ui_height();

    /* 品牌红 hero 带（沉浸，从 y=0 到 264；day=red / night=hero 深红压场）。 */
    meow_ui_fill_rect(0, 0, W, 264, pa->hero);

    /* 标题「网易云音乐」+ 红点 logo（用字体大小近似排版，host 字库用 ASCII 替文本）。 */
    const char *title = "网易云音乐";
    int tw = meow_ui_text_width(title, 34);
    meow_ui_text_center(W/2, 112, title, 34, pa->on_red);
    /* 24px 红点 logo（标题左前） */
    ncm_fill_round(W/2 - tw/2 - 36, 112 + 4, 24, 24, 12, pa->red_lit);

    meow_ui_text_center(W/2, 160, "扫码登录 / 音樂的力量", 22, pa->on_red_dim);
    /* 弱分隔（hero 与内容衔接） */
    meow_ui_fill_rect(0, 264, W, 1, th->outline);

    /* QR 卡（128,228,224,224）：day 纯白 / night surfaceContainer；圆角 16 + 内描边。 */
    int qc = 224, qx = (W - qc) / 2, qy = 228;
    ncm_fill_round(qx, qy, qc, qc, 16, th->surfaceContainer);
    meow_ui_draw_rect_round(qx, qy, qc, qc, 16, th->outlineVariant);

    int sz = g_st.qr_size;
    if (sz > 0) {
        /* 模块尺寸随内容缩放（二维码版本随内容长度变化，尺寸不固定——
         * 按容器内边距算模块边长，绝不溢出卡片） */
        int m = (qc - 32) / sz;
        if (m < 1) m = 1;
        int qs = m * sz;
        int ox = qx + (qc - qs) / 2, oy = qy + (qc - qs) / 2;
        /* 夜间：深灰底 + 浅灰码；白天：白底黑码 */
        uint32_t qr_bg = g_dark ? 0x2A2B30 : 0xFFFFFF;
        uint32_t qr_fg = g_dark ? 0xC9CAD1 : 0x000000;
        meow_ui_fill_rect(ox, oy, qs, qs, qr_bg);
        for (int y = 0; y < sz; y++)
            for (int x = 0; x < sz; x++)
                if (g_st.qr_mods[y*sz + x])
                    meow_ui_fill_rect(ox + x*m, oy + y*m, m, m, qr_fg);
    } else {
        meow_ui_text_center(W/2, qy + qc/2 - 10,
                            g_err ? "网络异常，点按重试" : "正在获取二维码...", 20, th->dim);
    }

    /* 状态文字：成功/等待用红（day red / night red_lit），失败红字提示。 */
    const char *st = login_status_str(g_st.login_state);
    if (g_st.login_state == NCM_LOGIN_OK && g_done) st = "登录成功";
    uint32_t scol = (g_st.login_state == NCM_LOGIN_OK) ? pa->red : th->dim;
    meow_ui_text_center(W/2, 476, st, 20, scol);

    /* 底部提示 */
    meow_ui_text_center(W/2, H - 56, "由 MeowOS 驱动 / 仅本地解码", 18, th->dim);
}

/* 重绘 login 内容（QR+状态变化时）。 */
static void login_repaint(void)
{
    meow_ui_invalidate(r_scr.x, r_scr.y, r_scr.w, r_scr.h);
}

const char *login_status_str(int state)
{
    switch (state) {
        case NCM_LOGIN_PENDING: return "等待扫码...";
        case NCM_LOGIN_SCANNED: return "已扫码，请在手机上确认";
        case NCM_LOGIN_OK:      return "登录成功";
        case NCM_LOGIN_EXPIRED: return "二维码已过期，正在刷新";
        default:                return "出错了，点按重试";
    }
}

static int get_unikey_and_qr(char *unikey, size_t usz)

{
    int rc = ncm_login_unikey(g_st.ctx.device_id, unikey, usz);
    if (rc != NCM_OK) { meow_log(MEOW_LOG_ERROR, "login: unikey fetch failed rc=%d", rc); return rc; }
    meow_log(MEOW_LOG_INFO, "login: unikey ok, qr ready");
    ncm_strlcpy(g_st.unikey, unikey, sizeof g_st.unikey);
    ncm_login_qr_url(unikey, g_st.qr_url, sizeof g_st.qr_url);
    int size = 0;
    if (ncm_login_qr_matrix(g_st.qr_url, g_st.qr_mods, sizeof g_st.qr_mods / 177, &size) != NCM_OK)
        g_st.qr_size = 0;
    else
        g_st.qr_size = size;
    g_st.login_state = NCM_LOGIN_PENDING;
    g_err = 0;
    return NCM_OK;
}

static void *login_worker(void *arg)
{
    (void)arg;
    char unikey[64];
    /* 自动重试：unikey 失败（网络未就绪/抖动）时 5s 退避重试，不再要求用户点重试 */
    int retry = 0;
    while (get_unikey_and_qr(unikey, sizeof unikey) != NCM_OK) {
        g_err = 1;
        if (g_app_quit) return NULL;
        meow_log(MEOW_LOG_WARN, "login: unikey retry in 5s (attempt %d)", ++retry);
        usleep(5 * 1000 * 1000);
    }
    meow_log(MEOW_LOG_INFO, "login: poll worker start");

    char cookie[NCM_COOKIE_MAX];
    ncm_strlcpy(cookie, g_st.ctx.cookie, sizeof cookie);

    while (!g_app_quit) {
        ncm_login_poll_t r;
        char out_cookie[NCM_COOKIE_MAX];
        int rc = ncm_login_poll(g_st.ctx.device_id, unikey, cookie, &r,
                                out_cookie, sizeof out_cookie);
        if (rc != NCM_OK) { meow_log(MEOW_LOG_WARN, "login: poll failed rc=%d", rc); g_err = 1; usleep(2 * 1000 * 1000); continue; }
        if (r.state != g_st.login_state)
            meow_log(MEOW_LOG_INFO, "login: state -> %d", (int)r.state);
        g_st.login_state = r.state;

        if (r.state == NCM_LOGIN_OK) {
            meow_log(MEOW_LOG_INFO, "login: 803 confirmed, saving cookie");
            ncm_strlcpy(cookie, out_cookie, sizeof cookie);
            ncm_ctx_set_cookie(&g_st.ctx, cookie);
            /* 803 后同步取 uid/nickname 并落盘（weapi 已修复：不再挂死、cookie 全量且去重发送，
             * 服务端认可会话）。此处在 worker 线程执行（不卡 UI）；失败不阻断跳页——home 加载
             * 时 appstate_ensure_uid 会再验一次（也设了硬超时上限，不阻塞歌单页）。 */
            char uid[32] = "", nick[128] = "";
            int src = ncm_login_status_check(g_st.ctx.device_id, cookie,
                                             uid, sizeof uid, nick, sizeof nick);
            meow_log(MEOW_LOG_INFO, "login: status_check rc=%d uid=%s nick=%s", src, uid, nick);
            appstate_set_logged_in(src == NCM_OK ? uid : "", src == NCM_OK ? nick : "");
            g_st.logged_in = 1;
            account_vip_maybe_refresh(1);   /* §20：登录后查一次会员态（本 worker 线程，不卡 UI） */
            g_done = 1;
            meow_log(MEOW_LOG_INFO, "login: -> home");
            break;
        }
        if (r.state == NCM_LOGIN_EXPIRED) {
            /* 刷新二维码 */
            usleep(500 * 1000);
            get_unikey_and_qr(unikey, sizeof unikey);
            continue;
        }
        usleep(1500 * 1000);
    }
    return NULL;
}

int login_start(void)
{
    if (g_polling) return 0;
    g_polling = 1;
    g_done = 0;
    g_err = 0;
    if (ncm_thread_create(&g_thread, login_worker, NULL) != 0) {
        g_polling = 0;
        return -1;
    }
    pthread_detach(g_thread);
    return 0;
}

int login_is_active(void) { return g_active; }

void login_on_tap(int x, int y)
{
    (void)x; (void)y;
    if (g_st.login_state == NCM_LOGIN_OK && g_done) return;
    if (g_err) { login_start(); login_repaint(); }   /* 网络失败重试 */
}

/* UI tick：重绘 QR/状态变化；登录成功 → 切 home。 */
void login_tick(uint64_t now)
{
    (void)now;
    chrome_tick();
    static int last_state = -1, last_qr = 0;
    if (g_st.login_state != last_state || g_st.qr_size != last_qr) {
        last_state = g_st.login_state;
        last_qr = g_st.qr_size;
        login_repaint();
    }
    if (g_done)
        meow_view_page_replace(ACT_HOME);
}

/* ---- 生命周期 ---- */
static void login_page_create(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    r_scr = NR(0, 0, meow_ui_width(), meow_ui_height());
    /* 沉浸式：登录页整屏自绘（hero 从 y=0 起，覆盖状态栏区）。只画一次并监听绘制物重绘。 */
    g_custom_id = meow_draw_custom_register(1, r_scr.x, r_scr.y, r_scr.w, r_scr.h,
                                            login_draw, NULL);
    g_active = 0;
}

static void login_page_enter(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    g_active = 1;
    const meow_theme *th = meow_theme_get();
    meow_ui_set_page_bg(th->bg);
    meow_ui_paint_full();
    if (!g_host_mock) login_start();   /* 进入即获取二维码 + 轮询 */
}

static void login_page_leave(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    g_active = 0;
}

static void login_page_destroy(meow_view *v, void *ctx)
{
    (void)v; (void)ctx;
    if (g_custom_id) { meow_draw_unregister(g_custom_id); g_custom_id = 0; }
}

meow_view *login_view_create(void)
{
    static const meow_view_hooks h = {
        .on_create  = login_page_create,
        .on_enter   = login_page_enter,
        .on_leave   = login_page_leave,
        .on_destroy = login_page_destroy,
    };
    return meow_view_create(ACT_LOGIN, MEOW_VIEW_ACTIVITY, &h, NULL);
}