import { describe, expect, it, vi } from 'vitest';
import { handleGroupAddRequest } from '../src/modules/request-actions';
import type { BridgeInterface } from '../../src/bridge/bridge-interface';
import type { GroupRequestInfo } from '@snowluma/protocol/qq-info';

// See `contact-actions.test.ts` for the auto-promotion rationale.
const APIS_ROUTING: Record<string, string> = {
    fetchFriendList: 'contacts',
    fetchGroupList: 'contacts',
    fetchGroupMemberList: 'contacts',
    fetchUserProfile: 'contacts',
    fetchGroupRequests: 'contacts',
    fetchGroupRequestsByUid: 'contacts',
    fetchDownloadRKeys: 'contacts',
    groupInvites: 'contacts',
    findGroupInviteCardGroupBySequence: 'contacts',
};

function fakeBridge(overrides: Record<string, any> = {}): BridgeInterface {
    const apisSynth: Record<string, Record<string, any>> = {};

    for (const [k, v] of Object.entries(overrides)) {
        const area = APIS_ROUTING[k];

        if (area) {
            if (!apisSynth[area]) {
                apisSynth[area] = {};
            }

            apisSynth[area][k] = v;
        }
    }

    const merged = { ...overrides, apis: { ...apisSynth, ...(overrides.apis ?? {}) } };
    return new Proxy(merged as BridgeInterface, {
        get(target, prop) {
            if (prop in target) {
                return (target as any)[prop];
            }

            throw new Error(`fakeBridge: '${String(prop)}' was not stubbed`);
        },
    });
}

function fakeRequest(overrides: Partial<GroupRequestInfo> = {}): GroupRequestInfo {
    return {
        groupId: 999,
        groupName: 'g',
        targetUid: 'u_t',
        targetUin: 5555,
        targetName: 'target',
        invitorUid: 'u_i',
        invitorUin: 7777,
        invitorName: 'inviter',
        operatorUid: 'u_o',
        operatorUin: 8888,
        operatorName: 'op',
        sequence: 42,
        state: 1,
        eventType: 2,
        comment: 'pls',
        filtered: false,
        ...overrides,
    };
}

describe('onebot/modules/request-actions / handleGroupAddRequest', () => {
    it('uses a canonical flag and keeps the tuple when the inbox has no match', async () => {
        const setAddRequest = vi.fn(async () => {});
        const fetchGroupRequests = vi.fn(async () => []);
        const bridge = fakeBridge({
            fetchGroupRequests,
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, 'slreq:1:123456:999:22:1', true, 'ok');

        expect(fetchGroupRequests).toHaveBeenCalled();
        expect(setAddRequest).toHaveBeenCalledWith(999, 123456, 22, true, 'ok', true, undefined);
    });

    it('corrects a stale canonical eventType from the live inbox', async () => {
        const setAddRequest = vi.fn(async () => {});
        const trans = Uint8Array.from([0xaa]);
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async (filtered: boolean) =>
                filtered
                    ? []
                    : [
                          fakeRequest({
                              groupId: 999,
                              sequence: 123456,
                              notifyType: 7,
                              eventType: 1,
                              filtered: false,
                              operateTransInfo: trans,
                          }),
                      ],
            ),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, 'slreq:1:123456:999:2:0', true, '');

        expect(setAddRequest).toHaveBeenCalledWith(999, 123456, 1, true, '', false, trans);
    });

    it('accepts a NapCat numeric sequence and resolves the exact main-inbox request', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async (filtered: boolean) =>
                filtered
                    ? []
                    : [
                          fakeRequest({
                              groupId: 999,
                              sequence: 261237407,
                              eventType: 1,
                              filtered: false,
                          }),
                      ],
            ),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, '261237407', false, 'no');

        expect(setAddRequest).toHaveBeenCalledWith(
            999,
            261237407,
            1,
            false,
            'no',
            false,
            undefined,
        );
    });

    it('accepts a NapCat numeric sequence from the filtered inbox', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async (filtered: boolean) =>
                filtered
                    ? [fakeRequest({ groupId: 999, sequence: 55, eventType: 2, filtered: true })]
                    : [],
            ),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, '55', true, 'ok');

        expect(setAddRequest).toHaveBeenCalledWith(999, 55, 2, true, 'ok', true, undefined);
    });

    it('resolves a private invite-card msgseq by its cached group', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => 999),
            fetchGroupRequests: vi.fn(async () => []),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, '778899', true, 'ok');

        expect(setAddRequest).toHaveBeenCalledWith(999, 778899, 2, true, 'ok', false, undefined);
    });

    it('matches add requests by groupId and targetUid', async () => {
        const setAddRequest = vi.fn(async () => {});
        const fetchGroupRequestsByUid = vi.fn(async () => [
            fakeRequest({ sequence: 41, targetUid: 'u_t', eventType: 2 }),
            fakeRequest({
                groupId: 999,
                targetUid: 'u_t',
                sequence: 42,
                eventType: 1,
                filtered: false,
            }),
        ]);
        const bridge = fakeBridge({
            fetchGroupRequestsByUid,
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, 'add:999:u_t', true, 'ok');

        expect(setAddRequest).toHaveBeenCalledOnce();
        expect(setAddRequest).toHaveBeenCalledWith(999, 42, 1, true, 'ok', false, undefined);
        expect(fetchGroupRequestsByUid).toHaveBeenCalledWith(false, 100);
        expect(fetchGroupRequestsByUid).toHaveBeenCalledWith(true, 100);
    });

    it('matches invite requests by groupId and invitorUid', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            fetchGroupRequestsByUid: vi.fn(async () => [
                fakeRequest({ sequence: 96, invitorUid: 'u_i', eventType: 1 }),
                fakeRequest({
                    groupId: 999,
                    invitorUid: 'u_i',
                    sequence: 97,
                    eventType: 22,
                    filtered: false,
                }),
            ]),
            groupInvites: { getSelfInviteNotice: vi.fn(() => undefined) },
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, 'invite:999:u_i', false, 'no');

        expect(setAddRequest).toHaveBeenCalledOnce();
        expect(setAddRequest).toHaveBeenCalledWith(999, 97, 22, false, 'no', false, undefined);
    });

    it('finds a request that only lives in the filtered inbox (#197)', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            // Main inbox empty; the invite sits only in the spam-filtered inbox.
            fetchGroupRequestsByUid: vi.fn(async (filtered: boolean) =>
                filtered
                    ? [
                          fakeRequest({
                              groupId: 999,
                              invitorUid: 'u_i',
                              sequence: 55,
                              eventType: 2,
                              filtered: true,
                          }),
                      ]
                    : [],
            ),
            groupInvites: { getSelfInviteNotice: vi.fn(() => undefined) },
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, 'invite:999:u_i', true, 'ok');

        // Approved through the filtered inbox (subCommand 2 → last arg true).
        expect(setAddRequest).toHaveBeenCalledOnce();
        expect(setAddRequest).toHaveBeenCalledWith(999, 55, 2, true, 'ok', true, undefined);
    });

    it('surfaces "not found" only when neither inbox has the request', async () => {
        const bridge = fakeBridge({
            fetchGroupRequestsByUid: vi.fn(async () => []),
            groupInvites: { getSelfInviteNotice: vi.fn(() => undefined) },
            apis: { groupAdmin: { setAddRequest: vi.fn(async () => {}) } } as any,
        });
        await expect(handleGroupAddRequest(bridge, 'invite:999:u_i', true, 'ok')).rejects.toThrow(
            /matching group request not found/,
        );
    });

    it('never picks one of two different pending invitations with the same legacy flag', async () => {
        const setAddRequest = vi.fn();
        const bridge = fakeBridge({
            groupInvites: { getSelfInviteNotice: vi.fn(() => undefined) },
            fetchGroupRequestsByUid: vi.fn(async (filtered: boolean) =>
                filtered ? [] : [fakeRequest({ sequence: 123 }), fakeRequest({ sequence: 124 })],
            ),
            apis: { groupAdmin: { setAddRequest } },
        });
        await expect(handleGroupAddRequest(bridge, 'invite:999:u_i', true, '')).rejects.toThrow(
            'multiple pending group requests',
        );
        expect(setAddRequest).not.toHaveBeenCalled();
    });

    it('skips processed requests when approving a legacy notice', async () => {
        const setAddRequest = vi.fn();
        const bridge = fakeBridge({
            groupInvites: { getSelfInviteNotice: vi.fn(() => undefined) },
            fetchGroupRequestsByUid: vi.fn(async (filtered: boolean) =>
                filtered
                    ? []
                    : [fakeRequest({ sequence: 123, state: 2 }), fakeRequest({ sequence: 124 })],
            ),
            apis: { groupAdmin: { setAddRequest } },
        });
        await handleGroupAddRequest(bridge, 'invite:999:u_i', true, '');
        expect(setAddRequest).toHaveBeenCalledExactlyOnceWith(
            999,
            124,
            2,
            true,
            '',
            false,
            undefined,
        );
    });

    it('does not treat an inviter QQ number as a request sequence (#213)', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async () => [
                fakeRequest({ groupId: 888, invitorUin: 261237407, sequence: 123456 }),
            ]),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await expect(handleGroupAddRequest(bridge, '261237407', true, 'ok')).rejects.toThrow(
            /sequence 261237407 not found/,
        );
        expect(setAddRequest).not.toHaveBeenCalled();
    });

    it('does not fall back to another request from the same group', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            fetchGroupRequestsByUid: vi.fn(async () => [
                fakeRequest({ groupId: 999, targetUid: 'u_someone_else' }),
            ]),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await expect(
            handleGroupAddRequest(bridge, 'add:999:u_missing', true, 'ok'),
        ).rejects.toThrow(/matching group request not found/);
        expect(setAddRequest).not.toHaveBeenCalled();
    });

    it('uses the surviving inbox when the other request lookup fails', async () => {
        const setAddRequest = vi.fn(async () => {});
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async (filtered: boolean) => {
                if (!filtered) {
                    throw new Error('main inbox down');
                }

                return [fakeRequest({ groupId: 999, sequence: 55, eventType: 2, filtered: true })];
            }),
            apis: { groupAdmin: { setAddRequest } } as any,
        });

        await handleGroupAddRequest(bridge, '55', true, 'ok');

        expect(setAddRequest).toHaveBeenCalledWith(999, 55, 2, true, 'ok', true, undefined);
    });

    it('does not report not-found when an unavailable inbox may contain the request', async () => {
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async (filtered: boolean) => {
                if (filtered) {
                    throw new Error('filtered inbox down');
                }

                return [];
            }),
            apis: { groupAdmin: { setAddRequest: vi.fn(async () => {}) } } as any,
        });

        await expect(handleGroupAddRequest(bridge, '55', true, 'ok')).rejects.toThrow(
            /lookup incomplete/,
        );
    });

    it('distinguishes request-queue failure from a genuine missing request', async () => {
        const bridge = fakeBridge({
            findGroupInviteCardGroupBySequence: vi.fn(() => undefined),
            fetchGroupRequests: vi.fn(async () => {
                throw new Error('OIDB unavailable');
            }),
            apis: { groupAdmin: { setAddRequest: vi.fn(async () => {}) } } as any,
        });

        await expect(handleGroupAddRequest(bridge, '55', true, 'ok')).rejects.toThrow(
            /failed to fetch group requests/,
        );
    });
});