import { Page, Response } from '@playwright/test';

import { ScopeDashboardBindingSpec, ScopeDashboardBindingStatus } from '@grafana/data';

import { Resource } from '../../public/app/features/apiserver/types';

import { testScopes } from './scopes';

const USE_LIVE_DATA = Boolean(process.env.API_CONFIG_PATH);

/**
 * Sets up all scope-related API routes before navigation.
 * This ensures that ALL scope API requests (including those made during initial page load)
 * are intercepted by the mocks, preventing RTK Query from caching real API responses.
 *
 * Call this BEFORE navigating to a page (e.g., before gotoDashboardPage).
 */
export async function setupScopeRoutes(page: Page, scopes: TestScope[]): Promise<void> {
  // Route for scope node children (tree structure)
  await page.route(`**/apis/scope.grafana.app/v0alpha1/namespaces/*/find/scope_node_children*`, async (route) => {
    const url = new URL(route.request().url());
    const parentParam = url.searchParams.get('parent');
    const queryParam = url.searchParams.get('query');

    // Find the appropriate scopes based on parent
    let scopesToReturn = scopes;
    if (parentParam) {
      // Find nested scopes based on parent name
      const findChildren = (items: TestScope[]): TestScope[] => {
        for (const item of items) {
          if (item.name === parentParam && item.children) {
            return item.children;
          }
          if (item.children) {
            const found = findChildren(item.children);
            if (found.length > 0) {
              return found;
            }
          }
        }
        return [];
      };
      scopesToReturn = findChildren(scopes);
      if (scopesToReturn.length === 0) {
        scopesToReturn = scopes; // Fallback to root scopes
      }
    }

    // Filter by search query if provided
    if (queryParam) {
      const query = queryParam.toLowerCase();
      const filterByQuery = (items: TestScope[]): TestScope[] => {
        const results: TestScope[] = [];
        for (const item of items) {
          // Exact match on name or title containing the query
          if (item.name.toLowerCase() === query || item.title.toLowerCase() === query) {
            results.push(item);
          } else if (item.name.toLowerCase().includes(query) || item.title.toLowerCase().includes(query)) {
            results.push(item);
          }
          // Also search in children
          if (item.children) {
            results.push(...filterByQuery(item.children));
          }
        }
        return results;
      };
      scopesToReturn = filterByQuery(scopesToReturn);
    }

    await route.fulfill({
      status: 200,
      contentType: 'application/json',
      body: JSON.stringify({
        apiVersion: 'scope.grafana.app/v0alpha1',
        kind: 'FindScopeNodeChildrenResults',
        metadata: {},
        items: scopesToReturn.map((scope) => ({
          kind: 'ScopeNode',
          apiVersion: 'scope.grafana.app/v0alpha1',
          metadata: {
            name: scope.name,
            namespace: 'default',
          },
          spec: {
            title: scope.title,
            description: scope.title,
            disableMultiSelect: scope.disableMultiSelect ?? false,
            nodeType: scope.children ? 'container' : 'leaf',
            ...(parentParam && { parentName: parentParam }),
            ...((scope.addLinks || scope.children) && {
              linkType: 'scope',
              linkId: `scope-${scope.name}`,
            }),
            ...(scope.redirectPath && { redirectPath: scope.redirectPath }),
          },
        })),
      }),
    });
  });

  // Route for individual scope fetching
  await page.route(`**/apis/scope.grafana.app/v0alpha1/namespaces/*/scopes/*`, async (route) => {
    const url = route.request().url();
    const scopeName = url.split('/scopes/')[1]?.split('?')[0];

    // Find the scope in the test data
    const findScope = (items: TestScope[]): TestScope | undefined => {
      for (const item of items) {
        if (`scope-${item.name}` === scopeName) {
          return item;
        }
        if (item.children) {
          const found = findScope(item.children);
          if (found) {
            return found;
          }
        }
      }
      return undefined;
    };

    const scope = findScope(scopes);

    if (scope) {
      await route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({
          kind: 'Scope',
          apiVersion: 'scope.grafana.app/v0alpha1',
          metadata: {
            name: `scope-${scope.name}`,
            namespace: 'default',
          },
          spec: {
            title: scope.title,
            description: '',
            filters: scope.filters,
            category: scope.category,
            type: scope.type,
          },
        }),
      });
    } else {
      await route.fulfill({ status: 404 });
    }
  });

  // Note: Dashboard bindings and navigations routes are set up dynamically in applyScopes()
  // with scope-specific URL patterns to avoid cache issues. They are not set up here.
}

export type TestScope = {
  name: string;
  title: string;
  children?: TestScope[];
  filters?: Array<{ key: string; value: string; operator: string }>;
  dashboardUid?: string;
  dashboardTitle?: string;
  disableMultiSelect?: boolean;
  type?: string;
  category?: string;
  addLinks?: boolean;
  redirectPath?: string;
};

type ScopeDashboardBinding = Resource<ScopeDashboardBindingSpec, ScopeDashboardBindingStatus, 'ScopeDashboardBinding'>;

/**
 * Sets up a route for scope node children requests and waits for the response.
 */
export async function scopeNodeChildrenRequest(
  page: Page,
  scopes: TestScope[],
  parentName?: string
): Promise<Response> {
  await page.route(`**/apis/scope.grafana.app/v0alpha1/namespaces/*/find/scope_node_children*`, async (route) => {
    await route.fulfill({
      status: 200,
      contentType: 'application/json',
      body: JSON.stringify({
        apiVersion: 'scope.grafana.app/v0alpha1',
        kind: 'FindScopeNodeChildrenResults',
        metadata: {},
        items: scopes.map((scope) => ({
          kind: 'ScopeNode',
          apiVersion: 'scope.grafana.app/v0alpha1',
          metadata: {
            name: `${scope.name}`,
            namespace: 'default',
          },
          spec: {
            title: scope.title,
            description: scope.title,
            disableMultiSelect: scope.disableMultiSelect ?? false,
            nodeType: scope.children ? 'container' : 'leaf',
            ...(parentName && {
              parentName,
            }),
            ...((scope.addLinks || scope.children) && {
              linkType: 'scope',
              linkId: `scope-${scope.name}`,
            }),
            ...(scope.redirectPath && {
              redirectPath: scope.redirectPath,
            }),
          },
        })),
      }),
    });
  });

  return page.waitForResponse((response) => response.url().includes(`/find/scope_node_children`));
}

/**
 * Opens the scopes selector dropdown and waits for the tree to load.
 */
export async function openScopesSelector(page: Page, scopes?: TestScope[]) {
  const click = async () => await page.getByTestId('scopes-selector-input').click();

  if (!scopes || USE_LIVE_DATA) {
    await click();
    return;
  }

  const responsePromise = scopeNodeChildrenRequest(page, scopes);

  await click();
  await responsePromise;
}

/**
 * Expands a scope tree node and waits for children to load.
 */
export async function expandScopesSelection(page: Page, parentScope: string, scopes?: TestScope[]) {
  const click = async () => await page.getByTestId(`scopes-tree-${parentScope}-expand`).click();

  if (!scopes || USE_LIVE_DATA) {
    await click();
    return;
  }

  const responsePromise = scopeNodeChildrenRequest(page, scopes, parentScope);

  await click();
  await responsePromise;
}

/**
 * Sets up a route for individual scope requests and waits for the response.
 */
export async function scopeSelectRequest(page: Page, selectedScope: TestScope): Promise<Response> {
  await page.route(
    `**/apis/scope.grafana.app/v0alpha1/namespaces/*/scopes/scope-${selectedScope.name}`,
    async (route) => {
      await route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({
          kind: 'Scope',
          apiVersion: 'scope.grafana.app/v0alpha1',
          metadata: {
            name: `scope-${selectedScope.name}`,
            namespace: 'default',
          },
          spec: {
            title: selectedScope.title,
            description: '',
            filters: selectedScope.filters,
            category: selectedScope.category,
            type: selectedScope.type,
          },
        }),
      });
    }
  );

  return page.waitForResponse((response) => response.url().includes(`/scopes/scope-${selectedScope.name}`));
}

/**
 * Selects a scope in the tree.
 */
export async function selectScope(page: Page, scopeName: string, selectedScope?: TestScope) {
  const click = async () => {
    const element = page.locator(
      `[data-testid="scopes-tree-${scopeName}-checkbox"], [data-testid="scopes-tree-${scopeName}-radio"], [data-testid="scopes-tree-${scopeName}-link"]`
    );
    await element.scrollIntoViewIfNeeded();
    await element.click({ force: true });
  };

  if (!selectedScope || USE_LIVE_DATA) {
    await click();
    return;
  }

  const responsePromise = scopeSelectRequest(page, selectedScope);

  await click();
  await responsePromise;
}

/**
 * Applies the selected scopes and waits for the selector to close and page to settle.
 * Sets up routes dynamically with scope-specific URL patterns to avoid cache issues.
 */
export async function applyScopes(page: Page, scopes?: TestScope[]) {
  const click = async () => {
    await page.getByTestId('scopes-selector-apply').scrollIntoViewIfNeeded();
    await page.getByTestId('scopes-selector-apply').click({ force: true });
  };

  if (!scopes || USE_LIVE_DATA) {
    await click();
    // Wait for the apply button to disappear (selector closed)
    await page.waitForSelector('[data-testid="scopes-selector-apply"]', { state: 'hidden', timeout: 5000 });
    // Wait for any resulting API calls (dashboard bindings, etc.) to complete
    await page.waitForLoadState('networkidle');
    return;
  }

  const dashboardBindingsUrl: string =
    '**/apis/scope.grafana.app/v0alpha1/namespaces/*/find/scope_dashboard_bindings?' +
    scopes.map((scope) => `scope=scope-${scope.name}`).join('&');

  const scopeNavigationsUrl: string =
    '**/apis/scope.grafana.app/v0alpha1/namespaces/*/find/scope_navigations?' +
    scopes.map((scope) => `scope=scope-${scope.name}`).join('&');

  const groups: string[] = ['Most relevant', 'Dashboards', 'Something else', ''];

  // Mock scope_dashboard_bindings endpoint with scope-specific URL pattern
  await page.route(dashboardBindingsUrl, async (route) => {
    await route.fulfill({
      status: 200,
      contentType: 'application/json',
      body: JSON.stringify({
        apiVersion: 'scope.grafana.app/v0alpha1',
        items: scopes.flatMap((scope) => {
          const bindings: ScopeDashboardBinding[] = [];

          for (let i = 0; i < 10; i++) {
            const selectedGroup = groups[Math.floor(Math.random() * groups.length)];
            bindings.push({
              kind: 'ScopeDashboardBinding',
              apiVersion: 'scope.grafana.app/v0alpha1',
              metadata: {
                name: 'scope',
                resourceVersion: '1',
                creationTimestamp: 'stamp',
              },
              spec: {
                dashboard: (scope.dashboardUid ?? 'edediimbjhdz4b') + '/' + Math.random().toString(),
                scope: `scope-${scope.name}`,
              },
              status: {
                dashboardTitle: (scope.dashboardTitle ?? 'A tall dashboard') + (selectedGroup[0] ?? 'U') + i,
                ...(selectedGroup !== '' && { groups: [selectedGroup] }),
              },
            });
          }

          // make sure there is always a binding with no group
          bindings.push({
            kind: 'ScopeDashboardBinding',
            apiVersion: 'scope.grafana.app/v0alpha1',
            metadata: {
              name: 'scope',
              resourceVersion: '1',
              creationTimestamp: 'stamp',
            },
            spec: {
              dashboard: (scope.dashboardUid ?? 'edediimbjhdz4b') + '/' + Math.random().toString(),
              scope: `scope-${scope.name}`,
            },
            status: {
              dashboardTitle: (scope.dashboardTitle ?? 'A tall dashboard') + 'U123',
            },
          });
          return bindings;
        }),
      }),
    });
  });

  // Mock scope_navigations endpoint with scope-specific URL pattern
  await page.route(scopeNavigationsUrl, async (route) => {
    await route.fulfill({
      status: 200,
      contentType: 'application/json',
      body: JSON.stringify({
        apiVersion: 'scope.grafana.app/v0alpha1',
        items: scopes.flatMap((scope) => {
          const navigations: Array<{
            kind: string;
            apiVersion: string;
            metadata: { name: string; resourceVersion: string; creationTimestamp: string };
            spec: { url: string; scope: string };
            status: { title: string };
          }> = [];

          // Create a scope navigation if dashboardUid is provided
          if (scope.dashboardUid && scope.addLinks) {
            navigations.push({
              kind: 'ScopeNavigation',
              apiVersion: 'scope.grafana.app/v0alpha1',
              metadata: {
                name: `scope-${scope.name}-nav`,
                resourceVersion: '1',
                creationTimestamp: 'stamp',
              },
              spec: {
                url: `/d/${scope.dashboardUid}`,
                scope: `scope-${scope.name}`,
              },
              status: {
                title: scope.dashboardTitle ?? scope.title,
              },
            });
          }

          return navigations;
        }),
      }),
    });
  });

  const responsePromise = page.waitForResponse(
    (response) =>
      response.url().includes(`/find/scope_dashboard_bindings`) || response.url().includes(`/find/scope_navigations`)
  );

  await click();
  await responsePromise;
  // Wait for the apply button to disappear (selector closed)
  await page.waitForSelector('[data-testid="scopes-selector-apply"]', { state: 'hidden', timeout: 5000 });
  // Wait for any resulting API calls to complete
  await page.waitForLoadState('networkidle');
}

/**
 * Searches for scopes in the tree and waits for results.
 * Sets up a route dynamically with filtered results to return only matching scopes.
 */
export async function searchScopes(page: Page, value: string, resultScopes?: TestScope[]) {
  const click = async () => await page.getByTestId('scopes-tree-search').fill(value);

  if (!resultScopes || USE_LIVE_DATA) {
    await click();
    return;
  }

  const responsePromise = scopeNodeChildrenRequest(page, resultScopes);

  await click();
  await responsePromise;
}

export async function getScopeTreeName(page: Page, nth: number): Promise<string> {
  const locator = page.getByTestId(/^scopes-tree-.*-expand/).nth(nth);
  const fullTestId = await locator.getAttribute('data-testid');
  const scopeName = fullTestId?.replace(/^scopes-tree-/, '').replace(/-expand$/, '');

  if (!scopeName) {
    throw new Error('There are no scopes in the selector');
  }

  return scopeName;
}

export async function getScopeLeafName(page: Page, nth: number): Promise<string> {
  const locator = page.getByTestId(/^scopes-tree-.*-(checkbox|radio|link)/).nth(nth);
  const fullTestId = await locator.getAttribute('data-testid');
  const scopeName = fullTestId?.replace(/^scopes-tree-/, '').replace(/-(checkbox|radio|link)/, '');

  if (!scopeName) {
    throw new Error('There are no scopes in the selector');
  }

  return scopeName;
}

export async function getScopeLeafTitle(page: Page, nth: number): Promise<string> {
  // Get the nth selectable tree item (checkbox, radio, or link)
  const leafLocator = page.getByTestId(/^scopes-tree-.*-(checkbox|radio|link)/).nth(nth);
  // Find the closest ancestor element that has the main tree item test id
  const titleLocator = leafLocator.locator(
    'xpath=ancestor::*[@data-testid][starts-with(@data-testid, "scopes-tree-") and not(contains(@data-testid, "-checkbox")) and not(contains(@data-testid, "-radio")) and not(contains(@data-testid, "-link")) and not(contains(@data-testid, "-expand"))]'
  );
  const scopeTitle = await titleLocator.textContent();
  if (!scopeTitle) {
    throw new Error('There are no scopes in the selector');
  }
  return scopeTitle;
}

export async function setScopes(page: Page, scopeBindingSetting?: { uid: string; title: string }) {
  const scopes = testScopes(scopeBindingSetting);
  await openScopesSelector(page, USE_LIVE_DATA ? undefined : scopes); //used only in mocked scopes version

  let scopeName = await getScopeTreeName(page, 0);

  const firstLevelScopes = scopes[0].children!; //used only in mocked scopes version
  await expandScopesSelection(page, scopeName, USE_LIVE_DATA ? undefined : firstLevelScopes);

  scopeName = await getScopeTreeName(page, 1);

  const secondLevelScopes = firstLevelScopes[0].children!; //used only in mocked scopes version
  await expandScopesSelection(page, scopeName, USE_LIVE_DATA ? undefined : secondLevelScopes);

  const selectedScopes = [secondLevelScopes[0]]; //used only in mocked scopes version

  scopeName = await getScopeLeafName(page, 0);
  await selectScope(page, scopeName, USE_LIVE_DATA ? undefined : selectedScopes[0]);

  await applyScopes(page, USE_LIVE_DATA ? undefined : selectedScopes); //used only in mocked scopes version
}