import { expect, test } from '@playwright/test'
import { readFile } from 'node:fs/promises'

function pngSize(bytes: Buffer): { width: number; height: number } {
    expect(bytes.subarray(1, 4).toString()).toBe('PNG')
    return { width: bytes.readUInt32BE(16), height: bytes.readUInt32BE(20) }
}

for (const viewport of [
    { name: 'desktop', width: 1280, height: 2200, theme: 'light' },
    { name: 'mobile', width: 390, height: 844, theme: 'light' },
    { name: 'mobile-dark', width: 390, height: 844, theme: 'dark' }
]) {
    test(`exports a populated wide PNG on ${viewport.name}`, async ({ page }, testInfo) => {
        let stylesheetRequests = 0
        await page.route('**/share-turn-extra.css', async (route) => {
            stylesheetRequests += 1
            if (stylesheetRequests === 1) {
                await route.fulfill({
                    contentType: 'text/css',
                    headers: { 'cache-control': 'no-store' },
                    body: '.share-turn-network-style{border-left:5px solid rgb(124 58 237);border-radius:14px;background:rgb(124 58 237 / 10%);padding:12px 16px}'
                })
                return
            }
            await route.abort()
        })
        await page.setViewportSize(viewport)
        await page.goto(`/e2e-fixtures/share-turn-fixture.html?theme=${viewport.theme}`)

        await expect(page.getByText('Complex response fixture')).toBeVisible()
        await expect(page.getByText('Excluded tool output')).toBeVisible()
        await expect(page.getByText(/type ExportResult/)).toBeVisible()
        await page.getByTestId('source-turn').screenshot({ path: testInfo.outputPath(`source-${viewport.name}.png`) })
        await page.getByRole('button', { name: 'Open share preview' }).click()
        await expect(page.getByRole('dialog')).toBeVisible()
        await expect(page.getByRole('dialog').getByText('Excluded tool output')).toHaveCount(0)
        await expect(page.getByRole('dialog').locator('.happy-message-actions')).toHaveCount(0)
        if (viewport.name === 'desktop') {
            const styles = await page.evaluate(() => {
                const source = document.querySelector<HTMLElement>('[data-testid="source-turn"]')
                const preview = document.querySelector<HTMLElement>('[data-hapi-share-body="true"]')
                if (!source || !preview) throw new Error('Missing comparison roots')
                const selectors = ['.happy-user-bubble', 'h2', 'blockquote', 'table', 'pre']
                const properties = ['fontFamily', 'fontSize', 'fontWeight', 'color', 'backgroundColor', 'borderRadius'] as const
                return selectors.map((selector) => {
                    const sourceElement = source.querySelector<HTMLElement>(selector)
                    const previewElement = preview.querySelector<HTMLElement>(selector)
                    if (!sourceElement || !previewElement) throw new Error(`Missing ${selector}`)
                    const sourceStyle = getComputedStyle(sourceElement)
                    const previewStyle = getComputedStyle(previewElement)
                    return properties.map((property) => [sourceStyle[property], previewStyle[property]])
                })
            })
            for (const pairs of styles) {
                for (const [sourceValue, previewValue] of pairs) {
                    expect(previewValue).toBe(sourceValue)
                }
            }
        }
        const downloadPromise = page.waitForEvent('download')
        await page.getByRole('button', { name: /Download PNG|下载 PNG/ }).click()
        const download = await downloadPromise
        const path = testInfo.outputPath(`share-turn-${viewport.name}.png`)
        await download.saveAs(path)

        const bytes = await readFile(path)
        const size = pngSize(bytes)
        expect(download.suggestedFilename()).toMatch(/^HAPI-\d{14}\.png$/)
        expect(bytes.byteLength).toBeGreaterThan(80_000)
        expect(size.width).toBe(1920)
        expect(size.height).toBeGreaterThan(1_000)
        expect(stylesheetRequests).toBe(1)
    })
}

test('exports a text-only user fallback alongside assistant DOM', async ({ page }, testInfo) => {
    await page.goto('/e2e-fixtures/share-turn-fixture.html?fallback=user')
    await page.getByRole('button', { name: 'Open share preview' }).click()

    const dialog = page.getByRole('dialog')
    await expect(dialog.getByText(/请导出这一轮复杂对话/)).toBeVisible()
    await expect(dialog.getByText('Complex response fixture')).toBeVisible()
    await dialog.screenshot({ path: testInfo.outputPath('fallback-preview.png') })

    const downloadPromise = page.waitForEvent('download')
    await dialog.getByRole('button', { name: /Download PNG|下载 PNG/ }).click()
    const download = await downloadPromise
    const path = testInfo.outputPath('fallback-export.png')
    await download.saveAs(path)

    const bytes = await readFile(path)
    const size = pngSize(bytes)
    expect(bytes.byteLength).toBeGreaterThan(80_000)
    expect(size.width).toBe(1920)
    expect(size.height).toBeGreaterThan(1_000)
})

test('keeps a stripped tool-only assistant snapshot out of the export', async ({ page }, testInfo) => {
    await page.goto('/e2e-fixtures/share-turn-fixture.html?toolOnly=assistant')
    await page.getByRole('button', { name: 'Open share preview' }).click()

    const dialog = page.getByRole('dialog')
    await expect(dialog.getByText('Complex response fixture')).toBeVisible()
    await expect(dialog.getByText('TOOL_ONLY_SECRET_SHOULD_NOT_EXPORT')).toHaveCount(0)

    const downloadPromise = page.waitForEvent('download')
    await dialog.getByRole('button', { name: /Download PNG|下载 PNG/ }).click()
    const download = await downloadPromise
    const path = testInfo.outputPath('tool-only-excluded-export.png')
    await download.saveAs(path)

    const bytes = await readFile(path)
    const size = pngSize(bytes)
    expect(bytes.byteLength).toBeGreaterThan(80_000)
    expect(size.width).toBe(1920)
    expect(size.height).toBeGreaterThan(1_000)
})

test('localizes the share dialog and exported badge in Chinese', async ({ page }) => {
    await page.addInitScript(() => localStorage.setItem('hapi-lang', 'zh-CN'))
    await page.goto('/e2e-fixtures/share-turn-fixture.html')
    await page.getByRole('button', { name: 'Open share preview' }).click()

    const dialog = page.getByRole('dialog')
    await expect(dialog.getByRole('heading', { name: '将本轮对话分享为图片' })).toBeVisible()
    await expect(dialog.getByText('分享会话', { exact: true })).toBeVisible()
    await expect(dialog.getByText('Generated by HAPI', { exact: true })).toBeVisible()
    await expect(dialog.getByRole('button', { name: '取消' })).toBeVisible()
    await expect(dialog.getByRole('button', { name: '复制图片' })).toBeVisible()
    await expect(dialog.getByRole('button', { name: '分享文件' })).toBeVisible()
    await expect(dialog.getByRole('button', { name: '下载 PNG' })).toBeVisible()
})

test('uses a prepared PNG while native share still has click activation', async ({ page }) => {
    await page.addInitScript(() => {
        const state = { calls: 0, active: false, fileType: '' }
        Object.defineProperty(window, '__hapiShareTest', { value: state, configurable: true })
        Object.defineProperty(navigator, 'canShare', {
            configurable: true,
            value: () => true
        })
        Object.defineProperty(navigator, 'share', {
            configurable: true,
            value: (data: ShareData) => {
                state.calls += 1
                state.active = navigator.userActivation?.isActive ?? false
                state.fileType = data.files?.[0]?.type ?? ''
                return Promise.resolve()
            }
        })
    })
    await page.goto('/e2e-fixtures/share-turn-fixture.html')
    await page.getByRole('button', { name: 'Open share preview' }).click()

    const shareButton = page.getByRole('dialog').getByRole('button', { name: 'Share file' })
    await expect(shareButton).toBeEnabled()
    await shareButton.click()

    await expect.poll(() => page.evaluate(() => {
        return (window as typeof window & { __hapiShareTest: { calls: number } }).__hapiShareTest.calls
    })).toBe(1)
    const result = await page.evaluate(() => {
        return (window as typeof window & {
            __hapiShareTest: { active: boolean; fileType: string }
        }).__hapiShareTest
    })
    expect(result.active).toBe(true)
    expect(result.fileType).toBe('image/png')
})