import { describe, expect, it, vi } from 'vitest';
import {
    GOOGLE_DRIVE_PLAYER_ACCESS_REQUIRED,
    GOOGLE_DRIVE_PLAYER_AMBIGUOUS,
    isGoogleDriveUrl,
    resolveMediaScriptTarget,
    selectGoogleDrivePlayerFrame
} from './media-frame-target.js';

const drivePlayerUrl = 'https://youtube.googleapis.com/embed/?enablejsapi=1&origin=https%3A%2F%2Fdrive.google.com';

describe('Google Drive media-frame targeting', () => {
    it('recognizes Drive tabs without treating other Google pages as Drive', () => {
        expect(isGoogleDriveUrl('https://drive.google.com/drive/u/1/search?q=mp4')).toBe(true);
        expect(isGoogleDriveUrl('https://docs.google.com/document/d/1/edit')).toBe(false);
    });

    it('selects the visible frame containing the real video', () => {
        const selected = selectGoogleDrivePlayerFrame([
            { frameId: 0, result: { href: 'https://drive.google.com/drive/u/1/search?q=mp4', videoCount: 0, videoScore: 0, frameArea: 900000 } },
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 1900000, frameArea: 900000, parentFrameVisible: true } },
            { frameId: 5, result: { href: drivePlayerUrl, videoCount: 0, videoScore: 0, frameArea: 0, parentFrameVisible: false } }
        ]);

        expect(selected.frameId).toBe(4);
    });

    it('never lets a hidden loaded player outrank the visible Drive player', () => {
        const selected = selectGoogleDrivePlayerFrame([
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 927600, frameArea: 900000, parentFrameVisible: true, parentFrameArea: 900000 } },
            { frameId: 5, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 1281600, frameArea: 900000, parentFrameVisible: false, parentFrameArea: 900000 } }
        ]);

        expect(selected.frameId).toBe(4);
    });

    it('refuses to guess when parent visibility is unavailable', () => {
        const selected = selectGoogleDrivePlayerFrame([
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 927600, frameArea: 900000 } },
            { frameId: 5, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 1281600, frameArea: 900000 } }
        ]);

        expect(selected).toBeNull();
    });

    it('ignores unrelated video frames inside a Drive tab', () => {
        const selected = selectGoogleDrivePlayerFrame([
            { frameId: 3, result: { href: 'https://example.com/embed', videoCount: 1, videoScore: 3000000, frameArea: 1200000 } },
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 927600, frameArea: 900000 } }
        ]);

        expect(selected.frameId).toBe(4);
    });

    it('falls back to the visible Drive player frame while its video is loading', () => {
        const selected = selectGoogleDrivePlayerFrame([
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 0, videoScore: 0, frameArea: 900000, parentFrameVisible: true } },
            { frameId: 5, result: { href: drivePlayerUrl, videoCount: 0, videoScore: 0, frameArea: 0, parentFrameVisible: false } }
        ]);

        expect(selected.frameId).toBe(4);
    });

    it('reports ambiguity instead of selecting a stale frame after retries', async () => {
        const ambiguousResults = [
            { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 927600, frameArea: 900000 } },
            { frameId: 5, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 1281600, frameArea: 900000 } }
        ];
        const executeScript = vi.fn().mockResolvedValue(ambiguousResults);

        await expect(resolveMediaScriptTarget(
            { scripting: { executeScript } },
            42,
            'https://drive.google.com/drive/u/1/search?q=mp4',
            { attempts: 1, retryDelayMs: 0 }
        )).rejects.toMatchObject({ code: GOOGLE_DRIVE_PLAYER_AMBIGUOUS });
    });

    it('probes all frames and returns only the frame with the Drive video', async () => {
        const executeScript = vi.fn()
            .mockResolvedValueOnce([
                { frameId: 0, result: { href: 'https://drive.google.com/drive/u/1/search?q=mp4', videoCount: 0, videoScore: 0, frameArea: 900000 } },
                { frameId: 4, result: { href: drivePlayerUrl, videoCount: 0, videoScore: 0, frameArea: 900000 } }
            ])
            .mockResolvedValueOnce([
                { frameId: 0, result: { href: 'https://drive.google.com/drive/u/1/search?q=mp4', videoCount: 0, videoScore: 0, frameArea: 900000 } },
                { frameId: 4, result: { href: drivePlayerUrl, videoCount: 1, videoScore: 1900000, frameArea: 900000 } }
            ]);

        await expect(resolveMediaScriptTarget(
            { scripting: { executeScript } },
            42,
            'https://drive.google.com/drive/u/1/search?q=mp4',
            { retryDelayMs: 0 }
        )).resolves.toEqual({ tabId: 42, frameIds: [4] });

        expect(executeScript).toHaveBeenCalledWith({
            target: { tabId: 42, allFrames: true },
            func: expect.any(Function)
        });
    });

    it('reports missing access when Drive exposes a player iframe but the frame cannot be inspected', async () => {
        const executeScript = vi.fn().mockResolvedValue([
            {
                frameId: 0,
                result: {
                    href: 'https://drive.google.com/drive/u/1/search?q=mp4',
                    videoCount: 0,
                    videoScore: 0,
                    frameArea: 900000,
                    drivePlayerIframeCount: 1
                }
            }
        ]);

        await expect(resolveMediaScriptTarget(
            { scripting: { executeScript } },
            42,
            'https://drive.google.com/drive/u/1/search?q=mp4',
            { attempts: 1, retryDelayMs: 0 }
        )).rejects.toMatchObject({ code: GOOGLE_DRIVE_PLAYER_ACCESS_REQUIRED });
    });

    it('reports missing access when the all-frame probe itself is rejected', async () => {
        const executeScript = vi.fn()
            .mockRejectedValueOnce(new Error('Cannot access contents of the frame'))
            .mockResolvedValueOnce([
                {
                    frameId: 0,
                    result: {
                        href: 'https://drive.google.com/drive/u/1/search?q=mp4',
                        videoCount: 0,
                        videoScore: 0,
                        frameArea: 900000,
                        drivePlayerIframeCount: 1
                    }
                }
            ]);

        await expect(resolveMediaScriptTarget(
            { scripting: { executeScript } },
            42,
            'https://drive.google.com/drive/u/1/search?q=mp4',
            { attempts: 1, retryDelayMs: 0 }
        )).rejects.toMatchObject({ code: GOOGLE_DRIVE_PLAYER_ACCESS_REQUIRED });
    });
});