import { describe, expect, it } from 'vitest';
import { composeCfg, parseCfg, parseOverlay } from '../../src/lib/server/fleet/config-compose.js';

const BASELINE = [
    '// GENERAL',
    'set g_inactivity "190"',
    'set sv_voice "1"',
    '',
    '// GAMEPLAY',
    'set g_playerCollision "0"',
    'set sv_maprotation "map zombie_theater"'
].join('\n');

describe('parseCfg', () => {
    it('captures set keys and preserves comments/blanks', () => {
        const p = parseCfg(BASELINE);
        expect(p.entries.get('g_inactivity')).toBe(1);
        expect(p.entries.get('sv_voice')).toBe(2);
        expect(p.entries.get('sv_maprotation')).toBe(6);
        expect(p.order[0]).toEqual({ kind: 'raw', line: '// GENERAL' });
        expect(p.order[3]).toEqual({ kind: 'raw', line: '' });
    });

    it('detects CRLF line endings', () => {
        const crlf = 'set a "1"\r\nset b "2"\r\n';
        expect(parseCfg(crlf).eol).toBe('\r\n');
    });
});

describe('parseOverlay', () => {
    it('reads set lines and ignores comments/blanks', () => {
        const overlay = '// disable AFK\nset g_inactivity "0"\n';
        const kv = parseOverlay(overlay);
        expect(kv.size).toBe(1);
        expect(kv.get('g_inactivity')).toBe('set g_inactivity "0"');
    });

    it('handles bare (unquoted) values', () => {
        const overlay = 'set g_logSync 1';
        const kv = parseOverlay(overlay);
        expect(kv.get('g_logSync')).toBe('set g_logSync 1');
    });

    it('later duplicate wins within an overlay', () => {
        const overlay = 'set x "1"\nset x "2"';
        expect(parseOverlay(overlay).get('x')).toBe('set x "2"');
    });
});

describe('composeCfg', () => {
    it('replaces matching keys in place', () => {
        const result = composeCfg(BASELINE, [{ id: 1, text: 'set g_inactivity "0"' }]);
        expect(result).toContain('set g_inactivity "0"');
        expect(result).not.toContain('set g_inactivity "190"');
        // Structure preserved: sv_voice should still be at its original spot.
        const lines = result.split('\n');
        expect(lines[1]).toBe('set g_inactivity "0"');
        expect(lines[2]).toBe('set sv_voice "1"');
    });

    it('appends new keys not present in baseline', () => {
        const result = composeCfg(BASELINE, [{ id: 1, text: 'set new_flag "yes"' }]);
        expect(result).toContain('set new_flag "yes"');
        expect(result).toContain('// --- appended by electric-cherry overlays ---');
    });

    it('applies multiple overlays deterministically by id', () => {
        const result = composeCfg(BASELINE, [
            { id: 2, text: 'set g_inactivity "60"' },
            { id: 1, text: 'set g_inactivity "0"' }
        ]);
        // id=2 is later → wins
        expect(result).toContain('set g_inactivity "60"');
        expect(result).not.toContain('set g_inactivity "0"');
    });

    it('preserves inline comments on the overlay line', () => {
        const result = composeCfg(BASELINE, [
            { id: 1, text: 'set g_inactivity "0"  // AFK disabled' }
        ]);
        expect(result).toContain('set g_inactivity "0"  // AFK disabled');
    });

    it('is a no-op when no overlays are given', () => {
        const result = composeCfg(BASELINE, []);
        expect(result.trim()).toBe(BASELINE.trim());
    });
});