import { describe, expect, it } from 'vitest';
import { composeCfg, composeServerCfg, parseCfg, parseOverlay } from '../../src/lib/server/fleet/config-compose.js';
import { T5_ZOMBIE_MAPS } from '../../src/lib/server/fleet/map-aliases.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());
    });
});

describe('automatic map selection', () => {
    it.each(T5_ZOMBIE_MAPS)('selects $friendly without a map overlay', ({ canonical }) => {
        const result = composeServerCfg(BASELINE, [], 't5', canonical);
        expect(result).toContain(`set sv_maprotation "map ${canonical}"`);
        expect(result.match(/^set sv_maprotation /gm)).toHaveLength(1);
        expect(result).toContain('set sv_voice "1"');
    });

    it('overrides legacy map-choice overlays while keeping other settings', () => {
        const result = composeServerCfg(BASELINE, [{
            id: 5, text: 'set sv_maprotation "map zombie_moon"\nset g_inactivity "0"'
        }], 't5', 'zombie_cosmodrome');
        expect(result).toContain('set sv_maprotation "map zombie_cosmodrome"');
        expect(result).not.toContain('map zombie_moon');
        expect(result).toContain('set g_inactivity "0"');
    });

    it('appends the rotation when absent and preserves CRLF', () => {
        expect(composeServerCfg('set sv_voice "1"\r\n', [], 't5', 'zombietron'))
            .toBe('set sv_voice "1"\r\n// Map selected by Electric Cherry\r\nset sv_maprotation "map zombietron"\r\n');
    });

    it('removes conflicting duplicate assignments regardless of case or command form', () => {
        const result = composeServerCfg([
            '// keep this comment',
            'set sv_maprotation "map zombie_theater"',
            'seta SV_MAPROTATION "map zombie_moon"',
            'sv_mapRotation "map zombie_pentagon"'
        ].join('\n'), [], 't5', 'zombie_cod5_sumpf');
        expect(result).toBe('// keep this comment\nset sv_maprotation "map zombie_cod5_sumpf"\n');
    });

    it.each([
        [null, null], ['t5', null], ['t5', 'custom_map'], ['t6', 'zombie_theater']
    ])('preserves existing behavior for unsupported game/map %s/%s', (game, map) => {
        expect(composeServerCfg(BASELINE, [], game, map)).toBe(composeCfg(BASELINE, []));
    });
});