// Tests for ApiHandler's central dispatch logging.
// Verifies that every action call emits a debug entry line, failures
// fold into a warn line with stack, and unknown actions are surfaced.
// Also covers the summarizeParams helper used to keep the entry log
// from blowing the line width.

import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import { MessageElementValidationError } from '@snowluma/protocol/element-manifest';
import { OidbError } from '@snowluma/protocol/oidb-service';
import { subscribeLogs, type LogEntry } from '@snowluma/common/logger';
import { summarizeParams } from '@snowluma/common/log-summary';
import { createCompiledTestHandler, testAction } from './helpers/compiled-action-handler';

// Minimal context — isolated test ActionSpecs never call these dependencies.
function emptyContext(): any {
    return {
        bridge: {},
        getLoginInfo: () => ({ userId: 0, nickname: '' }),
        isOnline: () => true,
        getMessage: () => null,
        getMessageMeta: () => null,
        sendPrivateMessage: async () => ({ messageId: 0 }),
        sendGroupMessage: async () => ({ messageId: 0 }),
        deleteMessage: async () => {},
        canSendImage: () => true,
        canSendRecord: () => true,
        getFriendList: async () => [],
        getImageInfo: async () => null,
        getRecordInfo: async () => null,
    };
}

let captured: LogEntry[];
let unsub: () => void;
const savedLogLevel = process.env.SNOWLUMA_LOG_LEVEL;

beforeEach(() => {
    process.env.SNOWLUMA_LOG_LEVEL = 'debug';
    captured = [];
    unsub = subscribeLogs((e) => captured.push(e));
});

afterEach(() => {
    unsub();

    if (savedLogLevel === undefined) {
        delete process.env.SNOWLUMA_LOG_LEVEL;
    } else {
        process.env.SNOWLUMA_LOG_LEVEL = savedLogLevel;
    }
});

describe('summarizeParams', () => {
    it('renders flat scalar fields as k=v pairs', () => {
        const out = summarizeParams({ group_id: 12345, auto_escape: false, foo: 'bar' });
        expect(out).toBe('group_id=12345 auto_escape=false foo="bar"');
    });

    it('truncates long string values with an ellipsis', () => {
        const long = 'x'.repeat(80);
        const out = summarizeParams({ s: long });
        expect(out).toMatch(/^s="x{40}\.\.\."$/);
    });

    it('collapses arrays and nested objects rather than dumping them', () => {
        const out = summarizeParams({ messages: [1, 2, 3, 4], meta: { a: 1, b: 2 } });
        expect(out).toBe('messages=[len=4] meta={...}');
    });

    it('caps the total line and tags the cut with ellipsis', () => {
        const params: Record<string, number> = {};

        for (let i = 0; i < 30; i++) {
            params[`field_with_some_padding_${i}`] = i;
        }

        const out = summarizeParams(params);
        expect(out.length).toBeLessThan(220);
        expect(out.endsWith('...')).toBe(true);
    });

    it('handles null / undefined inputs gracefully', () => {
        expect(summarizeParams(null)).toBe('{}');
        expect(summarizeParams(undefined)).toBe('{}');
    });
});

describe('ApiHandler dispatch logging', () => {
    it('emits a debug entry under [Bridge.Action] when an action is called', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [testAction('echo', async () => ({ status: 'ok', retcode: 0, data: null }))],
            12345,
        );

        await handler.handle('echo', { group_id: 67890, message: [1, 2, 3] });

        const entry = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'debug');
        expect(entry).toBeDefined();
        expect(entry!.uin).toBe(12345);
        expect(entry!.message).toContain('echo');
        expect(entry!.message).toContain('group_id=67890');
        expect(entry!.message).toContain('message=[len=3]');
    });

    it('logs the parsed emoji-like offset without exposing its cookie cursor', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('fetch_emoji_like', async () => ({
                    status: 'ok',
                    retcode: 0,
                    data: null,
                })),
            ],
            12345,
        );

        await handler.handle('fetch_emoji_like', {
            message_id: 1,
            emojiId: '66',
            cookie: '40',
        });

        const entry = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'debug');
        expect(entry?.message).toContain('emoji_like_offset=40');
        expect(entry?.message).not.toContain('cookie=');
    });

    it('keeps malformed emoji-like cookies redacted instead of parsing prefixes', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('fetch_emoji_like', async () => ({
                    status: 'ok',
                    retcode: 0,
                    data: null,
                })),
            ],
            12345,
        );

        await handler.handle('fetch_emoji_like', { cookie: '123.session=secret' });

        const entry = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'debug');
        expect(entry?.message).toContain('cookie=***');
        expect(entry?.message).not.toContain('emoji_like_offset=');
        expect(entry?.message).not.toContain('session=secret');
    });

    it('keeps cookie parameters redacted for every other action', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [testAction('other_action', async () => ({ status: 'ok', retcode: 0, data: null }))],
            12345,
        );

        await handler.handle('other_action', { cookie: '40' });

        const entry = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'debug');
        expect(entry?.message).toContain('cookie=***');
        expect(entry?.message).not.toContain('cookie=40');
    });

    it('emits a warn line with the error stack when the handler throws', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('boom', async () => {
                    throw new Error('kapow');
                }),
            ],
            12345,
        );

        const result = await handler.handle('boom', {});
        expect(result.status).toBe('failed');

        const warn = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'warn');
        expect(warn).toBeDefined();
        expect(warn!.message).toContain('boom');
        expect(warn!.message).toContain('kapow');
        // stack contains the test file path; just check that something stack-shaped is appended
        expect(warn!.message).toMatch(/at\s+/);
    });

    // The single error seam (ADR-0006 narrow seam): any throw from a handler
    // maps to ONE policy here — ACTION_FAILED (100) + the error message —
    // instead of each action hand-rolling its own inconsistent try/catch.
    it('maps any handler throw to ACTION_FAILED (100) with the error message', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('kaboom', async () => {
                    throw new Error('permission denied');
                }),
            ],
            12345,
        );

        const result = await handler.handle('kaboom', {});
        expect(result).toMatchObject({
            status: 'failed',
            retcode: 100,
            wording: 'permission denied',
        });
    });

    it('maps typed outbound message-contract failures to BAD_REQUEST', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('bad_message', async () => {
                    throw new MessageElementValidationError(
                        'UNKNOWN_TYPE',
                        'unknown message segment type: surprise',
                        'surprise',
                    );
                }),
            ],
            12345,
        );

        const result = await handler.handle('bad_message', {});
        expect(result).toMatchObject({
            status: 'failed',
            retcode: 1400,
            wording: 'unknown message segment type: surprise',
        });
    });

    it('surfaces the OidbError code + server message through error.message (no special-casing)', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('oidb_boom', async () => {
                    throw new OidbError(34, 'no permission', 0x11ec, 2);
                }),
            ],
            12345,
        );

        const result = await handler.handle('oidb_boom', {});
        expect(result).toMatchObject({ status: 'failed', retcode: 100 });
        expect((result as { wording: string }).wording).toContain('34');
        expect((result as { wording: string }).wording).toContain('no permission');
    });

    it('renders a non-Error throw via String()', async () => {
        const handler = createCompiledTestHandler(
            emptyContext(),
            [
                testAction('weird', async () => {
                    throw 'just a string';
                }),
            ],
            12345,
        );

        const result = await handler.handle('weird', {});
        expect(result).toMatchObject({ status: 'failed', retcode: 100, wording: 'just a string' });
    });

    it('logs unknown actions at debug level', async () => {
        const handler = createCompiledTestHandler(emptyContext(), [], 99);
        await handler.handle('not_a_real_action', {});

        const entry = captured.find(
            (e) => e.scope === 'Bridge.Action' && e.message.includes('unknown action'),
        );
        expect(entry).toBeDefined();
        expect(entry!.level).toBe('debug');
    });

    it('falls back to the module-level logger (no uin slot) when uin is omitted', async () => {
        const handler = createCompiledTestHandler(emptyContext(), [
            testAction('ping', async () => ({ status: 'ok', retcode: 0, data: null })),
        ]);

        await handler.handle('ping', {});

        const entry = captured.find((e) => e.scope === 'Bridge.Action' && e.level === 'debug');
        expect(entry).toBeDefined();
        expect(entry!.uin).toBeUndefined();
    });
});