/* 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_cont;

/* ---- 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();

    /* 标题 */
    meow_ui_text_center(r_cont.x + r_cont.w/2, r_cont.y + 24, "NetEase Cloud Music", 28, th->fg);
    meow_ui_text_center(r_cont.x + r_cont.w/2, r_cont.y + 64, "scan to sign in", 20, th->dim);

    /* QR 位图 */
    int sz = g_st.qr_size;
    if (sz > 0) {
        int qs = sz * 6;                     /* 每模块 6px → 41x41=246，33x33=198 */
        if (qs > 320) qs = sz * 4;
        int ox = r_cont.x + (r_cont.w - qs) / 2;
        int oy = r_cont.y + 108;
        /* 白色底 + 边框 */
        meow_ui_fill_rect(ox - 8, oy - 8, qs + 16, qs + 16, 0xFFFFFF);
        meow_ui_draw_rect(ox - 8, oy - 8, qs + 16, qs + 16, th->outline);
        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*6, oy + y*6, 6, 6, 0x000000);
    } else {
        meow_ui_text_center(r_cont.x + r_cont.w/2, r_cont.y + 180,
                            g_err ? "no network - tap to retry" : "fetching QR key...", 20, th->dim);
    }

    /* 状态文字 */
    const char *st = login_status_str(g_st.login_state);
    if (g_st.login_state == NCM_LOGIN_OK && g_done) st = "success";
    meow_ui_text_center(r_cont.x + r_cont.w/2, r_cont.y + 108 + 320 + 44,
                        st, 20, (g_st.login_state == NCM_LOGIN_OK) ? th->primary : th->dim);
}

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

const char *login_status_str(int state)
{
    switch (state) {
        case NCM_LOGIN_PENDING: return "waiting for scan...";
        case NCM_LOGIN_SCANNED: return "scanned - confirm on phone";
        case NCM_LOGIN_OK:      return "signed in!";
        case NCM_LOGIN_EXPIRED: return "QR expired - refreshing";
        default:                return "error, tap to retry";
    }
}

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);
            /* 先落登录态并放行跳页（真机联调 2026-08-31：status_check 在 weapi 读响应时
             * 挂死（HTTP 读循环超时未生效），把跳页卡在登录页。昵称是装饰信息，
             * 先跳 home（歌单请求会独立验证 cookie），status_check 留待修复后恢复。） */
            appstate_set_logged_in("", "");
            g_st.logged_in = 1;
            g_done = 1;
            meow_log(MEOW_LOG_INFO, "login: -> home (status_check deferred)");
            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 (pthread_create(&g_thread, NULL, 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_cont = ncm_content_rect();
    g_custom_id = meow_draw_custom_register(1, r_cont.x, r_cont.y, r_cont.w, r_cont.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);
}