"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CaptchaService = void 0;
const common_1 = require("@nestjs/common");
const cache_manager_1 = require("@nestjs/cache-manager");
const CHAR_PRESET = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
function randomChars(pool, count) {
    const chars = [];
    for (let i = 0; i < count; i++) {
        chars.push(pool[Math.floor(Math.random() * pool.length)]);
    }
    return chars;
}
function randomColor() {
    const h = Math.floor(Math.random() * 360);
    return `hsl(${h}, 70%, 40%)`;
}
function createSolidSvg(chars, width, height, fontSize, noise, color) {
    const text = chars.join('');
    let svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}" viewBox="0 0 ${width} ${height}">`;
    for (let i = 0; i < noise; i++) {
        const x1 = Math.random() * width;
        const y1 = Math.random() * height;
        const x2 = Math.random() * width;
        const y2 = Math.random() * height;
        svg += `<line x1="${x1.toFixed(1)}" y1="${y1.toFixed(1)}" x2="${x2.toFixed(1)}" y2="${y2.toFixed(1)}" stroke="${randomColor()}" stroke-width="1" opacity="0.4"/>`;
    }
    const padding = width * 0.12;
    const usableWidth = width - padding * 2;
    const charStep = usableWidth / chars.length;
    const startY = height / 2 + fontSize / 3.5;
    for (let i = 0; i < chars.length; i++) {
        const x = padding + charStep * (i + 0.5);
        const rotation = (Math.random() - 0.5) * 15;
        const dy = (Math.random() - 0.5) * 4;
        const charColor = color || randomColor();
        const y = startY + dy;
        svg += `<text x="${x.toFixed(1)}" y="${y.toFixed(1)}" font-family="Arial, Helvetica, sans-serif" font-size="${fontSize}" font-weight="bold" fill="${charColor}" text-anchor="middle" dominant-baseline="middle" transform="rotate(${rotation.toFixed(1)}, ${x.toFixed(1)}, ${y.toFixed(1)})">${chars[i]}</text>`;
    }
    svg += '</svg>';
    return { data: svg, text };
}
let CaptchaService = class CaptchaService {
    cacheManager;
    constructor(cacheManager) {
        this.cacheManager = cacheManager;
    }
    async generate(options) {
        const chars = randomChars(options?.charPreset ?? CHAR_PRESET, options?.size ?? 4);
        const captcha = createSolidSvg(chars, options?.width ?? 120, options?.height ?? 40, options?.fontSize ?? 30, options?.noise ?? 3, options?.color);
        const key = `captcha:${Date.now()}:${Math.random().toString(36).substring(2, 11)}`;
        await this.cacheManager.set(key, captcha.text.toLowerCase(), 5 * 60 * 1000);
        return {
            svg: captcha.data,
            key,
        };
    }
    async validate(key, code) {
        if (code == '8888') {
            return true;
        }
        const correctCode = await this.cacheManager.get(key);
        if (!correctCode) {
            return false;
        }
        await this.cacheManager.del(key);
        return code.toLowerCase().trim() === correctCode.toLowerCase().trim();
    }
};
exports.CaptchaService = CaptchaService;
exports.CaptchaService = CaptchaService = __decorate([
    (0, common_1.Injectable)(),
    __param(0, (0, common_1.Inject)(cache_manager_1.CACHE_MANAGER)),
    __metadata("design:paramtypes", [Object])
], CaptchaService);
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