/* test/shelf_bench_ondev.c — 真机耗时基准（不进发行包，不参与 mpk）。
 *
 * 目的：在**同一台设备、同一字库/主题环境**下量 App 的同步耗时，用来给书架缓存 /
 * 行自绘 / 开书路径做前后对比（宿主数字不算数）。
 *
 * 只调 App/SDK 公共入口（与 app.c 的调用顺序一致），不复制任何内部实现：
 *   meow_ui_init → 建三页 → push 书架（= 首次进书架，含扫描）
 *   → push/pop 阅读页 ×N（= 从阅读页返回书架）
 *   → shelf_on_swipe ×N（= 书架滑动，含 widget_draw + flush 上屏）
 *   → reader_open + push 阅读页（= 点书开读首屏）、翻页
 *
 * 用法（设备）：shelf_bench_ondev [book1 [book2 ...]]
 * 输出：`BENCH <key> <min>-<max> (avg ...)` 行，ms 为毫秒（设备时钟 10ms 分辨率，
 * 单次量用多轮取样给区间；批量操作用「总时长/次数」给出平均值）。
 */
#include "reader_internal.h"
#include "app/shelf_model.h"
#include "meow_ui_internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static uint64_t now_ms(void) { return meow_ui_time_ms(); }

static void bench_scan(void)
{
    static shelf_book books[SHELF_MAX_BOOKS];
    shelf_scan_report rep;
    uint64_t t0 = now_ms();
    int n = shelf_scan_books(READER_SD_ROOT "/Books", books, SHELF_MAX_BOOKS, NULL, &rep);
    uint64_t t1 = now_ms();
    printf("BENCH scan_ms %llu (n=%d truncated=%d depth_skipped=%d root_missing=%d)\n",
           (unsigned long long)(t1 - t0), n, rep.truncated, rep.depth_skipped, rep.root_missing);
    fflush(stdout);
}

int main(int argc, char **argv)
{
    meow_ui_opts o = { 480, 720 };
    if (meow_ui_init(&o) != 0) { printf("BENCH init_fail\n"); return 1; }
    meow_theme_add_listener(NULL);

    bench_scan();               /* 纯扫描基线（不建 UI） */

    shelf_view_create();
    reader_view_create();
    settings_view_create();

    /* ① 首次进书架（新进程：含全量扫描 + 建控件 + 首帧上屏） */
    uint64_t t0 = now_ms();
    meow_view_page_push(ACT_SHELF);
    uint64_t t1 = now_ms();
    printf("BENCH shelf_first_enter_ms %llu\n", (unsigned long long)(t1 - t0));

    /* ② 从阅读页返回书架：push 阅读页（不等书）→ pop 回书架；连做 5 次给区间 */
    unsigned long long rmin = 0, rmax = 0, rsum = 0;
    for (int i = 0; i < 5; i++) {
        meow_view_page_push(ACT_READER);
        uint64_t a = now_ms();
        meow_view_page_pop();
        uint64_t b = now_ms();
        uint64_t d = b - a;
        if (i == 0 || d < rmin) rmin = d;
        if (i == 0 || d > rmax) rmax = d;
        rsum += d;
    }
    printf("BENCH shelf_return_ms %llu-%llu (avg %llu)\n",
           rmin, rmax, rsum / 5);

    /* ③ 书架滑动：每步 62px（与 survey 同口径：scroll 62 + widget_draw + flush） */
    for (int batch = 0; batch < 3; batch++) {
        uint64_t a = now_ms();
        for (int i = 0; i < 30; i++) shelf_on_swipe(MEOW_SWIPE_UP, 0, 62);
        uint64_t b = now_ms();
        printf("BENCH shelf_scroll_step_ms %.1f (batch %d: 30 steps %llu ms)\n",
               (double)(b - a) / 30.0, batch, (unsigned long long)(b - a));
        for (int i = 0; i < 30; i++) shelf_on_swipe(MEOW_SWIPE_DOWN, 0, 62);   /* 回到顶部 */
    }
    fflush(stdout);

    /* ④ 开书首屏 / 翻页（argv 给书路径；不给则跳过） */
    for (int i = 1; i < argc; i++) {
        uint64_t a = now_ms();
        int rc = reader_open(argv[i]);
        uint64_t b = now_ms();
        if (rc != 0) { printf("BENCH open_fail %s\n", argv[i]); continue; }
        meow_view_page_push(ACT_READER);
        uint64_t c = now_ms();
        printf("BENCH open_ms %llu (reader_open %llu + page_push %llu) %s\n",
               (unsigned long long)(c - a), (unsigned long long)(b - a),
               (unsigned long long)(c - b), argv[i]);
        /* 翻页：reader_page_key 置 pending → reader_on_tick 消费（同步段=turn+refill+redraw）
         * 轮数由 MEOW_BENCH_TURNS 控制（0=不翻页 → 用于「开书不翻页进度文件不变」回归）。 */
        const char *et = getenv("MEOW_BENCH_TURNS");
        int nturns = et && et[0] ? atoi(et) : 4;
        unsigned long long tmin = 0, tmax = 0, tsum = 0;
        for (int p = 0; p < nturns; p++) {
            reader_page_key(1);
            uint64_t x = now_ms();
            reader_on_tick(now_ms());
            uint64_t y = now_ms();
            uint64_t d = y - x;
            if (p == 0 || d < tmin) tmin = d;
            if (p == 0 || d > tmax) tmax = d;
            tsum += d;
        }
        printf("BENCH turn_ms %llu-%llu (avg %llu) %s\n", tmin, tmax, nturns ? tsum / nturns : 0, argv[i]);
        meow_view_page_pop();
        fflush(stdout);
    }

    meow_ui_shutdown();
    return 0;
}