import { describe, expect, it } from 'vitest';
import { enrichGameChatTimeline, parseGameChat, parseGameChatTimeline, type ChatMatch, type ChatRoundReport } from '../../src/lib/game-chat.js';

describe('game chat', () => {
    it('extracts say messages and ignores joins', () => {
        expect(parseGameChat([
            ' 61:19 J;6493949;3;Conda1989',
            ' 63:09 say;4229696;0;alienfr;\x15just noticed i didnt have ANY perks go figure',
            ' 63:22 say;2989140;1;mikakyu;\x15whoopsie'
        ])).toEqual([
            { time: '63:09', guid: '4229696', slot: 0, player: 'alienfr', message: 'just noticed i didnt have ANY perks go figure' },
            { time: '63:22', guid: '2989140', slot: 1, player: 'mikakyu', message: 'whoopsie' }
        ]);
    });

    it('preserves semicolons, Unicode, repeated messages and log order across timer resets', () => {
        const lines = ['120:59 say;abc;2;^2Player;\x15hello; café <b>friends</b>!',
            '0:01 say;abc;2;Player;hello', '0:01 say;abc;2;Player;hello'];
        const messages = parseGameChat(lines);
        expect(messages.map(message => message.time)).toEqual(['120:59', '0:01', '0:01']);
        expect(messages[0]).toMatchObject({ player: 'Player', message: 'hello; café <b>friends</b>!' });
        expect(messages).toHaveLength(3);
    });

    it('ignores malformed, unrelated and empty entries', () => {
        expect(parseGameChat(['', 'say;123;0;Player;no timestamp', '1:00 say;123;0;Player',
            '1:00 say;123;bad;Player;hello', '1:00 say;123;0;Player;\x15^7',
            '1:00 InitGame: say;123;0;Player;hello', '1:00 sayteam;123;0;Player;hello'])).toEqual([]);
    });

    it('separates matches even when elapsed time keeps increasing', () => {
        const entries = parseGameChatTimeline([
            '1200:00 InitGame: \\mapname\\zombie_theater',
            '1201:00 say;abc;0;Player;first match',
            '1270:00 ExitLevel: executed',
            '1270:01 ShutdownGame:',
            '1280:00 InitGame:',
            '1290:00 say;abc;0;Player;second match',
            '1295:00 ExitLevel: executed'
        ]);
        expect(entries.map(entry => entry.type === 'boundary' ? entry.event : entry.message.message))
            .toEqual(['start', 'first match', 'end', 'start', 'second match', 'end']);
        expect(entries[0]).toEqual({ type: 'boundary', event: 'start', time: '1200:00' });
    });

    it('handles untimed boundaries and avoids an extra divider when InitGame resets the clock', () => {
        const entries = parseGameChatTimeline([
            '120:00 say;abc;0;Player;earlier match',
            'ExitLevel: executed', 'ShutdownGame:', 'InitGame:',
            '0:01 say;abc;0;Player;next match',
            '0:00 InitGame:', '0:02 say;abc;0;Player;another match'
        ]);
        expect(entries.filter(entry => entry.type === 'boundary')).toEqual([
            { type: 'boundary', event: 'end', time: null },
            { type: 'boundary', event: 'start', time: null },
            { type: 'boundary', event: 'start', time: '0:00' }
        ]);
    });

    it('detects missing start events from timer resets, including on non-chat lines', () => {
        const entries = parseGameChatTimeline([
            '5:00 say;abc;0;Player;earlier match',
            '0:00 J;abc;0;Player',
            '6:00 say;abc;0;Player;next match',
            '0:01 say;abc;0;Player;another match'
        ]);
        expect(entries.map(entry => entry.type === 'boundary' ? entry.event : entry.message.message))
            .toEqual(['earlier match', 'reset', 'next match', 'reset', 'another match']);
    });

    it('does not infer matches from chat content, repeated times or long gaps', () => {
        const entries = parseGameChatTimeline([
            '1:00 say;abc;0;Player;InitGame:',
            '1:00 say;abc;0;Player;ShutdownGame:',
            '900:00 say;abc;0;Player;ExitLevel: executed'
        ]);
        expect(entries).toHaveLength(3);
        expect(entries.every(entry => entry.type === 'message')).toBe(true);
    });
});

describe('chat time and round context', () => {
    const at = (seconds: number) => new Date(Date.parse('2026-10-02T12:00:00Z') + seconds * 1000).toISOString();
    const match = (start: number, end: number, overrides: Partial<ChatMatch> = {}): ChatMatch => ({
        startedAt: at(start), endedAt: at(end), lastReceivedAt: at(end), status: 'completed', startObserved: true, ...overrides
    });
    const report = (seconds: number, round: number, overrides: Partial<ChatRoundReport> = {}): ChatRoundReport => ({
        receivedAt: at(seconds), event: 'round_change', round, playerCount: 2, ...overrides
    });
    const say = (time: string, message = 'hello') => `${time} say;abc;0;Player;${message}`;
    const unavailable = { realTime: null, matchElapsedMs: null, round: null };

    it('anchors to the final log event and uses gameplay start, excluding engine idle time', () => {
        const lines = ['60:00 InitGame:', say('62:07'), say('62:15'), '62:30 J;def;1;Other'];
        const entries = enrichGameChatTimeline(lines, { mtime: at(150), matches: [match(120, 300)],
            reports: [report(125, 3), report(130, 4)] });
        expect(entries[1].context).toEqual({ realTime: at(127), matchElapsedMs: 7000, round: 3 });
        expect(entries[2].context).toEqual({ realTime: at(135), matchElapsedMs: 15000, round: 4 });
        expect(entries[0].context).toEqual({ realTime: at(0), matchElapsedMs: null, round: null });
    });

    it('associates messages with their own match when the engine clock continues across matches', () => {
        const entries = enrichGameChatTimeline(['60:00 InitGame:', say('60:30', 'old'), '61:00 ExitLevel:',
            '62:00 InitGame:', say('62:30', 'new')], { mtime: at(150), matches: [match(10, 60), match(130, 200)],
            reports: [report(20, 8), report(140, 2)] });
        expect(entries[1].context).toEqual({ realTime: at(30), matchElapsedMs: 20000, round: 8 });
        expect(entries[4].context).toEqual({ realTime: at(150), matchElapsedMs: 20000, round: 2 });
    });

    it('does not carry wall time backward across a clock reset on a non-chat line', () => {
        const entries = enrichGameChatTimeline([say('80:00', 'old'), '0:00 J;abc;0;Player', say('0:30', 'new')],
            { mtime: at(300), matches: [match(0, 500)], reports: [report(280, 10)] });
        expect(entries[0].context).toEqual(unavailable);
        // The preceding match cannot leak past the inferred new match at 12:04:30.
        expect(entries[2].context).toEqual({ realTime: at(300), matchElapsedMs: null, round: null });
    });

    it('treats repeated zero-time InitGame and untimed lifecycle events as unanchored earlier sessions', () => {
        for (const boundary of ['0:00 InitGame:', 'InitGame:', 'ShutdownGame:']) {
            const entries = enrichGameChatTimeline([say('0:00', 'old'), boundary, say('0:30', 'new')],
                { mtime: at(300), matches: [], reports: [] });
            expect(entries[0].context).toEqual(unavailable);
            expect(entries.at(-1)?.context.realTime).toBe(at(300));
        }
    });

    it('can enrich a tail without InitGame but never invents a start for a partially observed match', () => {
        const options = { mtime: at(150), matches: [match(100, 300)], reports: [report(140, 8)] };
        expect(enrichGameChatTimeline([say('800:00')], options)[0].context)
            .toEqual({ realTime: at(150), matchElapsedMs: 50000, round: 8 });
        options.matches[0].startObserved = false;
        expect(enrichGameChatTimeline([say('800:00')], options)[0].context)
            .toEqual({ realTime: at(150), matchElapsedMs: null, round: 8 });
    });

    it('does not treat old or future reports, game starts, or the highest round as the message round', () => {
        for (const reports of [[report(29, 5)], [report(151, 10)],
            [report(140, 0, { event: 'game_start', round: null })], []]) {
            expect(enrichGameChatTimeline([say('62:30')], { mtime: at(150), matches: [match(0, 300)], reports })[0].context)
                .toMatchObject({ realTime: at(150), round: null });
        }
    });

    it('does not continue match context after an empty report, game end, or an unreported new log session', () => {
        for (const change of [report(140, 8, { playerCount: 0 }), report(140, 8, { event: 'game_end' })]) {
            expect(enrichGameChatTimeline([say('62:30')], { mtime: at(150), matches: [match(0, 300)],
                reports: [report(130, 7), change] })[0].context)
                .toEqual({ realTime: at(150), matchElapsedMs: null, round: null });
        }
        for (const boundary of ['62:00 InitGame:', '62:00 ExitLevel:', 'InitGame:']) {
            expect(enrichGameChatTimeline([boundary, say('62:30')], { mtime: at(150), matches: [match(0, 300)],
                reports: [report(130, 7)] }).at(-1)?.context)
                .toEqual({ realTime: at(150), matchElapsedMs: null, round: null });
        }
    });

    it('bounds active matches by recent evidence and interrupted matches by their last observation', () => {
        for (const recorded of [match(0, 300, { status: 'active', endedAt: null, lastReceivedAt: at(29) }),
            match(0, 300, { status: 'interrupted', endedAt: null, lastReceivedAt: at(140) })]) {
            expect(enrichGameChatTimeline([say('62:30')], { mtime: at(150), matches: [recorded], reports: [report(29, 7)] })[0].context)
                .toEqual({ realTime: at(150), matchElapsedMs: null, round: null });
        }
    });

    it('keeps active context from fresh heartbeats even when leaderboard deduplication stopped its clock', () => {
        expect(enrichGameChatTimeline([say('62:30')], { mtime: at(150),
            matches: [match(0, 300, { status: 'active', endedAt: null, lastReceivedAt: at(10) })],
            reports: [report(140, 7, { event: 'heartbeat' })] })[0].context)
            .toEqual({ realTime: at(150), matchElapsedMs: 150000, round: 7 });
    });

    it('allows a start before the first observed event following an implicit clock reset', () => {
        expect(enrichGameChatTimeline([say('80:00'), '0:05 J;abc;0;Player', say('0:20')], {
            mtime: at(300), matches: [match(280, 400)], reports: [report(290, 1)]
        }).at(-1)?.context).toEqual({ realTime: at(300), matchElapsedMs: 20000, round: 1 });
    });

    it('uses the same latest game_start as fleet when the leaderboard deduplicates start retries', () => {
        const entries = enrichGameChatTimeline([say('62:00'), say('62:30')], { mtime: at(150),
            matches: [match(0, 300)], reports: [report(0, 0, { event: 'game_start', round: null }),
                report(130, 0, { event: 'game_start', round: null }), report(140, 1)] });
        expect(entries[0].context.matchElapsedMs).toBe(120000);
        expect(entries[1].context).toEqual({ realTime: at(150), matchElapsedMs: 20000, round: 1 });
        expect(enrichGameChatTimeline(['62:00 InitGame:', say('62:30')], { mtime: at(150),
            matches: [match(0, 300)], reports: [report(130, 0, { event: 'game_start', round: null }), report(140, 1)]
        }).at(-1)?.context).toEqual({ realTime: at(150), matchElapsedMs: 20000, round: 1 });
    });

    it('leaves context unknown without a usable final write timestamp', () => {
        for (const mtime of [null, 'bad date']) {
            expect(enrichGameChatTimeline([say('62:30')], { mtime, matches: [match(0, 300)], reports: [report(140, 7)] })[0].context)
                .toEqual(unavailable);
        }
        expect(enrichGameChatTimeline([say('62:30'), 'untimed write'], { mtime: at(150), matches: [], reports: [] })[0].context)
            .toEqual(unavailable);
        expect(enrichGameChatTimeline([], { mtime: at(150), matches: [], reports: [] })).toEqual([]);
    });
});