/* test_bgmgr.c — 批③ 后台管理页 逻辑层宿主单测（meow_bgmgr）。
 *
 * 验证：
 *   1) bgmgr_collect：enumerate 后台表 → app_meta 补 name/icon/framework/is_fg → proc_sample 补
 *      pcpu/rss_kb；行 killable 预判正确；name 回退 app_id。
 *   2) bgmgr_can_kill 门控矩阵：framework=1 → 0（**框架 App 不 kill**）；is_fg=1 → 0（当前前台不 kill）；
 *      pid<=0 → 0（非后台/无进程）；普通后台（非框架/非前台/pid>0）→ 1。
 *   3) bgmgr_kill_all 一键清：框架 App 不杀、当前前台不杀、非后台不杀；其余逐一 kill；返回 kill 数。
 *   4) bgmgr_status_str / bgmgr_mem_str 文案。
 * 只依赖 meow_bgmgr.c + meow_ipc.h（纯 C）；宿主 gcc 直编：
 *   gcc -Wall -Wextra -std=gnu99 test_bgmgr.c meow_bgmgr.c -o test_bgmgr
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include "meow_bgmgr.h"

static int g_fails = 0;
#define CHECK(cond, msg) do { \
    if (cond) printf("PASS: %s\n", msg); \
    else { printf("FAIL: %s\n", msg); g_fails++; } } while (0)

/* ---- 假件（enumerate/app_meta/proc_sample 注入）---- */
static const char g_meta_app[][24] = {
    "os.meow.hello", "os.meow.reader", "os.meow.sysguard", "os.meow.fgapp",
};
static int  g_killed_n = 0;
static char g_killed_app[8][40];
static int  g_meta_use_unknown = 0;   /* 第 4 行 meta 返回 -1（未注册），测 name 回退 */

static int fake_enumerate(void *ctx, bgmgr_row_t *rows, int max)
{
    (void)ctx;
    if (max < 4) return 0;
    /* 4 个后台行：hello=普通、reader=常驻、sysguard=framework、fgapp=当前前台 */
    memset(&rows[0], 0, sizeof rows[0]);
    snprintf(rows[0].app_id, sizeof rows[0].app_id, "%s", g_meta_app[0]);
    rows[0].pid = 1001; rows[0].keepalive = 0; rows[0].on_card = 0; rows[0].bg_since_ms = 1000;

    memset(&rows[1], 0, sizeof rows[1]);
    snprintf(rows[1].app_id, sizeof rows[1].app_id, "%s", g_meta_app[1]);
    rows[1].pid = 1002; rows[1].keepalive = 1; rows[1].on_card = 0; rows[1].bg_since_ms = 2000;

    memset(&rows[2], 0, sizeof rows[2]);
    snprintf(rows[2].app_id, sizeof rows[2].app_id, "%s", g_meta_app[2]);
    rows[2].pid = 1003; rows[2].keepalive = 0; rows[2].on_card = 0; rows[2].bg_since_ms = 3000;

    memset(&rows[3], 0, sizeof rows[3]);
    snprintf(rows[3].app_id, sizeof rows[3].app_id, "%s", g_meta_app[3]);
    rows[3].pid = 1004; rows[3].keepalive = 0; rows[3].on_card = 0; rows[3].bg_since_ms = 4000;
    return 4;
}

/* meta：hello/reader/sysguard/fgapp 各给名字；sysguard 标 framework；pid==1004 标前台。 */
static int fake_app_meta(void *ctx, const char *app_id, pid_t pid,
                         char *name, int nl, char *icon, int il,
                         char *framework, int *is_fg)
{
    (void)ctx;
    if (!strcmp(app_id, "os.meow.hello"))       snprintf(name, nl, "播放");
    else if (!strcmp(app_id, "os.meow.reader")) snprintf(name, nl, "阅读");
    else if (!strcmp(app_id, "os.meow.sysguard")) snprintf(name, nl, "系统守护");
    else if (!strcmp(app_id, "os.meow.fgapp"))  snprintf(name, nl, "前台应用");
    else return -1;                                     /* 未注册 → name 回退 app_id */
    snprintf(icon, il, "/tmp/icon_%s.png", app_id);
    *framework = (!strcmp(app_id, "os.meow.sysguard")) ? '1' : 0;
    *is_fg     = (pid == 1004) ? 1 : 0;                 /* fgapp 标前台 */
    return 0;
}

static int fake_proc_sample(void *ctx, pid_t pid, double *pcpu, long *rss_kb)
{
    (void)ctx;
    if (pid <= 0) return -1;
    *pcpu   = (double)(pid % 100) * 0.5;      /* 1001->0.5% ... 1004->2.0% */
    *rss_kb = (long)(pid % 10) * 2048;        /* 1001->2048 ... 1004->8192 */
    return 0;
}

static void fake_log(const char *fmt, ...) { (void)fmt; }

static void fake_kill(const char *app_id)
{
    if (g_killed_n < 8) snprintf(g_killed_app[g_killed_n++], 40, "%s", app_id);
}

/* enumerate 只回一行：未注册 app_id，测 name 回退。 */
static int fake_enumerate_unknown(void *ctx, bgmgr_row_t *rows, int max)
{
    (void)ctx;
    if (max < 1) return 0;
    (void)g_meta_use_unknown;
    memset(&rows[0], 0, sizeof rows[0]);
    snprintf(rows[0].app_id, sizeof rows[0].app_id, "os.meow.noreg");
    rows[0].pid = 2001; rows[0].keepalive = 0;
    return 1;
}

int main(void)
{
    bgmgr_ops_t ops;
    memset(&ops, 0, sizeof ops);
    ops.enumerate   = fake_enumerate;
    ops.app_meta    = fake_app_meta;
    ops.proc_sample = fake_proc_sample;
    ops.log         = fake_log;

    bgmgr_row_t rows[MEOW_BGMR_ROW_MAX];
    int n = bgmgr_collect(&ops, rows, MEOW_BGMR_ROW_MAX);

    printf("=== 1) collect ===\n");
    CHECK(n == 4, "collect returns 4 rows");
    CHECK(!strcmp(rows[0].name, "播放") && rows[0].pid == 1001, "row0 hello name/pid");
    CHECK(rows[0].framework == 0, "row0 hello not framework");
    CHECK(!strcmp(rows[1].name, "阅读") && rows[1].keepalive == 1, "row1 reader keepalive");
    CHECK(rows[2].framework == '1', "row2 sysguard framework");
    CHECK(rows[3].is_fg == 1, "row3 fgapp is_fg");
    CHECK(rows[0].pcpu > 0 && rows[0].rss_kb > 0, "row0 pcpu/rss populated");
    CHECK(rows[0].killable == 1 && rows[2].killable == 0, "killable prefilled by can_kill");
    CHECK(!strcmp(rows[2].icon, "/tmp/icon_os.meow.sysguard.png"), "icon populated");

    /* name 回退：未注册 app_id（app_meta 返回 -1）→ name==app_id */
    printf("=== 1b) name fallback ===\n");
    {
        bgmgr_ops_t o2 = ops; o2.enumerate = fake_enumerate_unknown;
        bgmgr_row_t r1[1]; memset(r1, 0, sizeof r1);
        int n2 = bgmgr_collect(&o2, r1, 1);
        CHECK(n2 == 1, "unknown row collected");
        CHECK(!strcmp(r1[0].name, "os.meow.noreg"), "name falls back to app_id");
        CHECK(bgmgr_can_kill(&r1[0]) == 1, "unknown bg app still killable");
    }

    printf("=== 2) can_kill gating ===\n");
    CHECK(bgmgr_can_kill(&rows[2]) == 0, "framework app NOT killable");
    CHECK(bgmgr_can_kill(&rows[3]) == 0, "fg app NOT killable (is_fg)");
    CHECK(bgmgr_can_kill(&rows[0]) == 1, "normal bg app killable");
    CHECK(bgmgr_can_kill(&rows[1]) == 1, "keepalive bg app killable");
    {
        bgmgr_row_t dead; memset(&dead, 0, sizeof dead);
        snprintf(dead.app_id, sizeof dead.app_id, "x");
        dead.pid = 0;
        CHECK(bgmgr_can_kill(&dead) == 0, "pid<=0 NOT killable");
        CHECK(bgmgr_can_kill(NULL) == 0, "NULL NOT killable");
    }

    printf("=== 3) kill_all (one-key clear) ===\n");
    g_killed_n = 0;
    int k = bgmgr_kill_all(&ops, rows, n, fake_kill);
    CHECK(k == 2, "kill_all kills 2 (hello+reader)");
    CHECK(g_killed_n == 2, "kill_all actually invoked kill_fn 2x");
    int killed_fw = 0, killed_fg = 0, killed_bg = 0;
    for (int i = 0; i < g_killed_n; i++) {
        if (!strcmp(g_killed_app[i], "os.meow.sysguard")) killed_fw = 1;
        if (!strcmp(g_killed_app[i], "os.meow.fgapp"))    killed_fg = 1;
        if (!strcmp(g_killed_app[i], "os.meow.hello"))    killed_bg = 1;
    }
    CHECK(killed_fw == 0, "kill_all did NOT kill framework app");
    CHECK(killed_fg == 0, "kill_all did NOT kill fg app");
    CHECK(killed_bg == 1, "kill_all killed a real bg app");
    CHECK(bgmgr_kill_all(&ops, rows, n, NULL) == 0, "kill_all NULL kill_fn -> 0");

    printf("=== 4) status/mem str ===\n");
    CHECK(!strcmp(bgmgr_status_str(&rows[1]), "常驻"), "status_str keepalive=常驻");
    CHECK(!strcmp(bgmgr_status_str(&rows[0]), "后台"), "status_str normal=后台");
    CHECK(!strcmp(bgmgr_status_str(&rows[3]), "前台"), "status_str is_fg=前台");
    CHECK(!strcmp(bgmgr_mem_str(512), "512KB"), "mem_str(<1MB)=KB");
    CHECK(!strcmp(bgmgr_mem_str(2048), "2.0MB"), "mem_str(>=1MB)=MB");

    if (g_fails == 0) printf("\nALL PASS (%d checks)\n", 20);
    else printf("\n%d FAILED\n", g_fails);
    return g_fails ? 1 : 0;
}