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;bad;Player;hello',
                '1:00 sayteam;123;0;Player;\x15^7'
            ])
        ).toEqual([]);
    });

    it('keeps team and public chat in order with distinct channels and stable public identities', () => {
        const messages = parseGameChat([
            '1:00 say;123;0;Player;hello; café',
            '1:00 sayteam;123;0;^2Player;\x15hello; café',
            '1:01 sayteam;456;1;Teammate;reply'
        ]);
        expect(messages).toEqual([
            { time: '1:00', guid: '123', slot: 0, player: 'Player', message: 'hello; café' },
            {
                time: '1:00',
                guid: '123',
                slot: 0,
                player: 'Player',
                message: 'hello; café',
                channel: 'team'
            },
            {
                time: '1:01',
                guid: '456',
                slot: 1,
                player: 'Teammate',
                message: 'reply',
                channel: 'team'
            }
        ]);
        expect(JSON.stringify(messages[0])).toBe(
            '{"time":"1:00","guid":"123","slot":0,"player":"Player","message":"hello; café"}'
        );
    });

    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(
            []
        );
    });
});