/* lock_settings.c — MeowOS 系统设置「锁屏 PIN」独立子页面（subpage.c 脚手架，用户定案 2026-09-02）。
 *
 * 页面（sub_page_t 驱动，同 wifi_page/bt_page）：
 *   - 状态行（SUB_ROW）：未设置 / 已设置 / 锁定中（剩余 mm:ss）
 *   - [未设] 设置 PIN：4 位数字双输入确认（lck_input_pin_modal，SDK 数字键）
 *   - [已设] 修改 PIN：需旧 PIN 一次校验 + 新 PIN 双输入确认
 *   - [已设] 清除 PIN：**无需旧密码**（物理持机即授权，仅 s_dd_modal 二次确认）→ lck_pin_clear
 *   - 唤醒后锁屏（system.pin_lock_on_wake）开关行
 * 全程走 lock_screen.c 纯逻辑 + meow_settings 后端（无旁路）。
 */
#include "meow_launcher_internal.h"

#define LS_ACT_STATUS  0
#define LS_ACT_SET     1
#define LS_ACT_MODIFY  2
#define LS_ACT_CLEAR   3
#define LS_ACT_WAKE    4

static char g_ls_status[48];              /* 状态行摘要（rows 填，paint 后不再变） */

static void ls_status_text(char *buf, int len)
{
    if (!lck_pin_configured()) { snprintf(buf, len, "未设置"); return; }
    time_t rem = lck_lock_remaining();
    if (rem > 0) snprintf(buf, len, "锁定中（%d:%02d）", (int)(rem / 60), (int)(rem % 60));
    else         snprintf(buf, len, "已设置");
}

static int ls_rows(void *ctx, sub_row_t *rbuf, int max)
{
    (void)ctx;
    int n = 0;
    if (n < max) { rbuf[n].kind = SUB_HDR; rbuf[n].label = "锁屏 PIN"; rbuf[n].sub = NULL; rbuf[n].on = 0; rbuf[n].act = 0; n++; }
    ls_status_text(g_ls_status, sizeof g_ls_status);
    if (n < max) { rbuf[n].kind = SUB_ROW; rbuf[n].label = "状态"; rbuf[n].sub = g_ls_status; rbuf[n].on = 0; rbuf[n].act = LS_ACT_STATUS; n++; }
    int configured = lck_pin_configured();
    if (!configured) {
        if (n < max) { rbuf[n].kind = SUB_ACT; rbuf[n].label = "设置 PIN"; rbuf[n].sub = NULL; rbuf[n].on = 0; rbuf[n].act = LS_ACT_SET; n++; }
    } else {
        if (n < max) { rbuf[n].kind = SUB_ACT; rbuf[n].label = "修改 PIN"; rbuf[n].sub = NULL; rbuf[n].on = 0; rbuf[n].act = LS_ACT_MODIFY; n++; }
        if (n < max) { rbuf[n].kind = SUB_ACT; rbuf[n].label = "清除 PIN"; rbuf[n].sub = NULL; rbuf[n].on = 0; rbuf[n].act = LS_ACT_CLEAR; n++; }
    }
    if (n < max) {
        int wake = 1;
        if (meow_settings_get_int("system.pin_lock_on_wake", &wake) != 0) wake = 1;
        rbuf[n].kind = SUB_SW; rbuf[n].label = "唤醒后锁屏"; rbuf[n].sub = NULL;
        rbuf[n].on = wake; rbuf[n].act = LS_ACT_WAKE; n++;
    }
    return n;
}

static void ls_modal(const char *title, const char *line)
{
    const char *it[1]; it[0] = line;
    s_dd_modal(title, it, 1, -1);
}

static int ls_do_modify(void)
{
    char old[LCK_PIN_LEN + 1];
    if (!lck_input_pin_modal("输入当前 PIN", old, sizeof old)) return 0;
    if (!lck_pin_check(old)) { ls_modal("修改 PIN", "当前 PIN 错误"); return 1; }
    char a[LCK_PIN_LEN + 1], b[LCK_PIN_LEN + 1];
    if (!lck_input_pin_modal("设置新 PIN", a, sizeof a)) return 0;
    if (!lck_input_pin_modal("再次确认新 PIN", b, sizeof b)) return 0;
    if (strcmp(a, b) != 0) { ls_modal("修改 PIN", "两次输入不一致"); return 1; }
    if (lck_pin_set(a) == MEOW_OK) ls_modal("修改 PIN", "已修改");
    else                            ls_modal("修改 PIN", "设置失败");
    return 1;
}

static int ls_do_set(void)
{
    char a[LCK_PIN_LEN + 1], b[LCK_PIN_LEN + 1];
    if (!lck_input_pin_modal("设置 4 位 PIN", a, sizeof a)) return 0;
    if (!lck_input_pin_modal("再次输入确认", b, sizeof b)) return 0;
    if (strcmp(a, b) != 0) { ls_modal("设置 PIN", "两次输入不一致"); return 1; }
    if (lck_pin_set(a) == MEOW_OK) ls_modal("设置 PIN", "已设置");
    else                            ls_modal("设置 PIN", "设置失败");
    return 1;
}

static int ls_do_clear(void)
{
    const char *items[2]; items[0] = "是"; items[1] = "否";
    int pick = s_dd_modal("确定清除锁屏 PIN？", items, 2, 1);   /* 默认「否」（安全） */
    if (pick != 0) return 1;
    if (lck_pin_clear() == MEOW_OK) ls_modal("清除 PIN", "已清除");
    else                            ls_modal("清除 PIN", "清除失败（settings 不可写）");
    return 1;
}

static int ls_act(void *ctx, int idx, int act)
{
    (void)ctx; (void)idx;
    switch (act) {
    case LS_ACT_SET:    return ls_do_set();
    case LS_ACT_MODIFY: return ls_do_modify();
    case LS_ACT_CLEAR:  return ls_do_clear();
    case LS_ACT_WAKE: {
        int v = 1;
        if (meow_settings_get_int("system.pin_lock_on_wake", &v) != 0) v = 1;
        meow_settings_set_int("system.pin_lock_on_wake", v ? 0 : 1);
        meow_settings_save();
        logmsg("lock_settings: wake-lock toggle -> %d", v ? 0 : 1);
        return 1;   /* 重绘 + 重填行（开关态） */
    }
    default: return 0;
    }
}

static int ls_detail(void *ctx, int idx, int act)
{
    (void)ctx; (void)idx;
    if (act == LS_ACT_STATUS) {
        char line[80];
        ls_status_text(line, sizeof line);
        int rem = (int)lck_lock_remaining();
        if (lck_pin_configured() && rem > 0) {
            char buff[96];
            snprintf(buff, sizeof buff, "连续错误已锁定，剩余 %d:%02d 后重试", rem / 60, rem % 60);
            ls_modal("锁屏 PIN", buff);
        } else {
            ls_modal("锁屏 PIN", line);
        }
        return 1;
    }
    return 0;
}

/* 运行「锁屏 PIN」独立子页面（阻塞到返回） */
int run_lock_settings_page(void)
{
    sub_page_t p;
    memset(&p, 0, sizeof p);
    p.title = "锁屏 PIN";
    p.top_sw = NULL;
    p.top_sw_set = NULL;
    p.rows = ls_rows;
    p.act = ls_act;
    p.detail = ls_detail;
    p.live = 0;
    p.ctx = NULL;
    return meow_subpage_run(&p);
}