/**
 * mizan E2E Integration Tests
 *
 * Real Chromium → Real React app (generated hooks) → Real Django backend
 *
 * Every test uses the generated mizan API, not raw call() or fetch().
 */

import { test, expect } from '@playwright/test'

const BASE = process.env.HARNESS_URL || 'http://localhost:5174'

async function fixture(page: any, name: string) {
    await page.goto(`${BASE}#${name}`)
    await page.waitForSelector('[data-testid="result"], [data-testid="error-type"]', { timeout: 10000 })
}

async function getResult(page: any): Promise<any> {
    const el = page.locator('[data-testid="result"]')
    if (await el.count() > 0) return JSON.parse(await el.textContent())
    return null
}

async function getError(page: any) {
    const typeEl = page.locator('[data-testid="error-type"]')
    if (await typeEl.count() === 0) return null
    return {
        type: await typeEl.textContent(),
        code: await page.locator('[data-testid="error-code"]').textContent(),
        message: await page.locator('[data-testid="error-message"]').textContent(),
    }
}

// ─── useEcho, useAdd, useMultiply ───────────────────────────────────────────

test.describe('generated function hooks', () => {
    test('useEcho returns echoed text', async ({ page }) => {
        await fixture(page, 'echo')
        const result = await getResult(page)
        expect(result.message).toContain('e2e-test')
    })

    test('useAdd returns correct sum', async ({ page }) => {
        await fixture(page, 'add')
        const result = await getResult(page)
        expect(result.result).toBe(42)
    })

    test('useMultiply (class-based ServerFunction) returns product', async ({ page }) => {
        await fixture(page, 'multiply')
        const result = await getResult(page)
        expect(result.product).toBe(42)
    })

    test('usePermissionCheckFn succeeds with correct secret', async ({ page }) => {
        await fixture(page, 'permission-success')
        const result = await getResult(page)
        expect(result.message).toBe('access granted')
    })
})

// ─── Error handling ─────────────────────────────────────────────────────────

test.describe('error codes from generated hooks', () => {
    test('non-existent function → DjangoError NOT_FOUND', async ({ page }) => {
        await fixture(page, 'not-found')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(error!.code).toBe('NOT_FOUND')
    })

    test('wrong input types → DjangoError VALIDATION_ERROR', async ({ page }) => {
        await fixture(page, 'validation-error')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(error!.code).toBe('VALIDATION_ERROR')
    })

    test('useWhoami anonymous → auth error', async ({ page }) => {
        await fixture(page, 'auth-required')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(['UNAUTHORIZED', 'FORBIDDEN']).toContain(error!.code)
    })

    test('useStaffOnly anonymous → UNAUTHORIZED', async ({ page }) => {
        await fixture(page, 'staff-only')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(['UNAUTHORIZED', 'FORBIDDEN']).toContain(error!.code)
    })

    test('useSuperuserOnly anonymous → UNAUTHORIZED', async ({ page }) => {
        await fixture(page, 'superuser-only')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(['UNAUTHORIZED', 'FORBIDDEN']).toContain(error!.code)
    })

    test('useVerifiedOnly anonymous → FORBIDDEN', async ({ page }) => {
        await fixture(page, 'verified-only')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(['UNAUTHORIZED', 'FORBIDDEN']).toContain(error!.code)
    })

    test('useNotImplementedFn → NOT_IMPLEMENTED', async ({ page }) => {
        await fixture(page, 'not-implemented')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(error!.code).toBe('NOT_IMPLEMENTED')
    })

    test('useBuggyFn → INTERNAL_ERROR', async ({ page }) => {
        await fixture(page, 'internal-error')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(error!.code).toBe('INTERNAL_ERROR')
    })

    test('usePermissionCheckFn wrong secret → FORBIDDEN', async ({ page }) => {
        await fixture(page, 'permission-error')
        const error = await getError(page)
        expect(error!.type).toBe('DjangoError')
        expect(error!.code).toBe('FORBIDDEN')
    })
})

// ─── Context hooks ──────────────────────────────────────────────────────────

test.describe('generated context hooks', () => {
    test('useCurrentUser returns anonymous data', async ({ page }) => {
        await page.goto(`${BASE}#context-current-user`)
        // Context loads async, wait for result
        await page.waitForSelector('[data-testid="result"]', { timeout: 10000 })
        const result = await getResult(page)
        expect(result.authenticated).toBe(false)
        expect(result.email).toBe('')
    })
})

// ─── Form hooks ─────────────────────────────────────────────────────────────

test.describe('generated form hooks', () => {
    test('useLoginForm loads schema with field definitions', async ({ page }) => {
        await fixture(page, 'form-login-schema')
        const result = await getResult(page)
        expect(result.fields).toBeDefined()
        expect(result.fields.login).toBeDefined()
        expect(result.fields.password).toBeDefined()
    })

    test('useContactForm loads schema with mizanFormMeta', async ({ page }) => {
        await fixture(page, 'form-contact-schema')
        const result = await getResult(page)
        expect(result.title).toBe('Contact Us')
        expect(result.subtitle).toBe("We'd love to hear from you")
        expect(result.submit_label).toBe('Send Message')
        expect(result.meta.live_validation).toBe(true)
    })

    test('useContactForm submit returns on_submit_success data', async ({ page }) => {
        await fixture(page, 'form-contact-submit')
        const result = await getResult(page)
        expect(result.success).toBe(true)
        expect(result.data.received).toBe(true)
        expect(result.data.from).toBe('test@example.com')
    })
})

// ─── Channel hooks ──────────────────────────────────────────────────────────

test.describe('generated channel hooks', () => {
    test('useChatChannel receives echoed message', async ({ page }) => {
        await page.goto(`${BASE}#channel-chat`)
        await page.waitForFunction(
            () => {
                const el = document.querySelector('[data-testid="channel-message-count"]')
                return el && parseInt(el.textContent || '0') > 0
            },
            { timeout: 15000 }
        )
        const msg = JSON.parse(await page.locator('[data-testid="channel-last-message"]').textContent())
        expect(msg.text).toBe('hello from e2e')
    })
})