class WebFetcherModule {
    constructor() {
        this.commands = {};
        this.terminal = null;
    }
    getHelpInfo() {
        return {
            'fetch': 'fetch <url> [--post=BODY] [--type=CT] [--raw] — Fetch URL (raw HTML/text); --post enables POST with body, --type sets Content-Type, --raw shows untruncated content',
            'extract': 'extract <url> — Extract readable article content (title + body text) from a URL',
        };
    }
    registerCommands() {
        this.commands['fetch'] = (args) => this.fetchUrl(args);
        this.commands['extract'] = (args) => this.extractUrl(args);
    }
    async _fetchWithTimeout(url, timeoutMs = 30000) {
        // Wrap fetch with AbortController for client-side timeout
        const controller = new AbortController();
        const timeout = setTimeout(() => controller.abort(), timeoutMs);
        try {
            return await fetch(url, { signal: controller.signal });
        } finally {
            clearTimeout(timeout);
        }
    }
    _parseFlags(args) {
        // Extract --key=value flags from args; return {flags, positional}
        const flags = {};
        const positional = [];
        for (const a of args) {
            const m = String(a).match(/^--([a-zA-Z][\w-]*)(?:=(.*))?$/);
            if (m) {
                flags[m[1]] = m[2] !== undefined ? m[2] : true;
            } else {
                positional.push(a);
            }
        }
        return { flags, positional };
    }
    async fetchUrl(args) {
        const { flags, positional } = this._parseFlags(args || []);
        if (!positional[0]) {
            this.terminal.print("Usage: fetch <url> [--post=BODY] [--type=CT] [--raw]", "warning");
            this.terminal.print("  Example: fetch https://example.com", "info");
            this.terminal.print("  Example: fetch https://api.hyperliquid.xyz/info --post='{\"type\":\"l2Book\",\"coin\":\"HYPE\"}' --type=application/json", "info");
            return;
        }
        let url = positional[0];
        if (!url.match(/^https?:\/\//i)) url = 'https://' + url;
        const method = flags.post ? 'POST' : 'GET';
        const showRaw = !!flags.raw;
        this.terminal.print(`🌐 Fetching (${method}): ${url}`, "info");
        if (flags.post) this.terminal.print(`📤 Body: ${String(flags.post).substring(0, 200)}${String(flags.post).length > 200 ? '...' : ''}`, "info");
        try {
            const params = new URLSearchParams({ url });
            if (flags.post) { params.set('method', 'POST'); params.set('body', flags.post); }
            if (flags.type) params.set('content_type', flags.type);
            const resp = await this._fetchWithTimeout('/api/fetch?' + params.toString(), 30000);
            if (resp.status === 403) { this.terminal.print('Blocked: internal network addresses not allowed', 'error'); return; }
            if (!resp.ok) {
                // Try to parse JSON error from proxy
                const ct = resp.headers.get('Content-Type') || '';
                if (ct.includes('application/json')) {
                    const err = await resp.json().catch(() => ({}));
                    this.terminal.print('Fetch failed: ' + (err.error || 'HTTP ' + resp.status) + (err.details ? ' — ' + err.details.split('\n')[0] : ''), 'error');
                } else {
                    this.terminal.print('Fetch failed: HTTP ' + resp.status, 'error');
                }
                return;
            }
            const text = await resp.text();
            const limit = showRaw ? text.length : 3000;
            this.terminal.print(`\n=== Content from ${url} (${method}) ===\n`, 'success');
            this.terminal.print(text.substring(0, limit) + (text.length > limit && !showRaw ? '...' : ''));
            this.terminal.print(`\n📏 Content Length: ${text.length} chars${showRaw ? ' (raw, untruncated)' : ''}`, 'info');
        } catch (e) {
            if (e.name === 'AbortError') {
                this.terminal.print(`⏱ Request timed out (30s). Try \`extract\` instead of \`fetch\` for slow sites.`, 'error');
            } else {
                this.terminal.print('Fetch failed: ' + e.message, 'error');
            }
        }
    }
    async extractUrl(args) {
        if (!args[0]) {
            this.terminal.print("Usage: extract <url>", "warning");
            this.terminal.print("Example: extract https://example.com", "info");
            return;
        }
        let url = args[0];
        if (!url.match(/^https?:\/\//i)) url = 'https://' + url;
        this.terminal.print(`📄 Extracting: ${url}`, "info");
        try {
            const resp = await this._fetchWithTimeout('/api/extract?url=' + encodeURIComponent(url), 30000);
            if (resp.status === 403) { this.terminal.print('Blocked: internal network addresses not allowed', 'error'); return; }
            if (!resp.ok) {
                const err = await resp.json().catch(() => ({}));
                this.terminal.print('Extract failed: ' + (err.error || 'HTTP ' + resp.status) + (err.details ? ' — ' + err.details.split('\n')[0] : ''), 'error');
                return;
            }
            const data = await resp.json();
            if (data.title) this.terminal.print(`\n📰 ${data.title}\n`, 'success');
            this.terminal.print(data.content || '(no content extracted)');
            this.terminal.print(`\n📏 ${data.word_count || 0} words (via ${data.method || 'unknown'})`, 'info');
            // F5: Follow-up hint
            this.terminal.print(`💡 Try \`summarize ${url}\` for AI summary, or \`nvfs-resolve <concept>\` to find related files`, 'info');
        } catch (e) {
            if (e.name === 'AbortError') {
                this.terminal.print(`⏱ Extract timed out (30s). Site may be slow or blocking automated access.`, 'error');
            } else {
                this.terminal.print('Extract failed: ' + e.message, 'error');
            }
        }
    }
}