//! Integration tests for the plugin validation pipeline.
//!
//! Renderer-level behaviour (e.g., Dioxus components) is out of scope here;
//! that requires a Dioxus runtime and belongs in pinakes-ui tests.

use std::collections::HashMap;

use pinakes_plugin_api::{
  DataSource,
  HttpMethod,
  UiElement,
  UiPage,
  UiWidget,
  validation::SchemaValidator,
};

// Build a minimal valid UiPage.
fn make_page(id: &str, route: &str) -> UiPage {
  UiPage {
    id:           id.to_string(),
    title:        "Integration Test Page".to_string(),
    route:        route.to_string(),
    icon:         None,
    root_element: UiElement::Container {
      children: vec![],
      gap:      0,
      padding:  None,
    },
    data_sources: HashMap::new(),
    actions:      HashMap::new(),
  }
}

// Build a minimal valid UiWidget.
fn make_widget(id: &str, target: &str) -> UiWidget {
  UiWidget {
    id:      id.to_string(),
    target:  target.to_string(),
    content: UiElement::Container {
      children: vec![],
      gap:      0,
      padding:  None,
    },
  }
}

// Build a complete valid PluginManifest as TOML string.
const fn valid_manifest_toml() -> &'static str {
  r#"
[plugin]
name = "integration-test-plugin"
version = "1.0.0"
api_version = "1.0"
kind = ["ui_page"]

[plugin.binary]
wasm = "plugin.wasm"

[[ui.pages]]
id = "stats"
title = "Statistics"
route = "/plugins/integration-test/stats"

[ui.pages.layout]
type = "container"
children = []
gap = 0

[[ui.widgets]]
id = "status-badge"
target = "library_header"

[ui.widgets.content]
type = "badge"
text = "online"
"#
}

// A complete valid manifest (with a page and a widget) passes all
// checks.
#[test]
fn test_full_valid_plugin_manifest_passes_all_checks() {
  use pinakes_plugin_api::PluginManifest;

  let manifest = PluginManifest::parse_str(valid_manifest_toml())
    .expect("manifest must parse");

  assert_eq!(manifest.plugin.name, "integration-test-plugin");
  assert_eq!(manifest.ui.pages.len(), 1);
  assert_eq!(manifest.ui.widgets.len(), 1);

  // validate page via UiPage::validate
  let page = make_page("my-plugin-page", "/plugins/integration-test/overview");
  page
    .validate()
    .expect("valid page must pass UiPage::validate");

  // validate the same page via SchemaValidator
  SchemaValidator::validate_page(&page)
    .expect("valid page must pass SchemaValidator::validate_page");

  // validate widget
  let widget = make_widget("my-widget", "library_header");
  SchemaValidator::validate_widget(&widget)
    .expect("valid widget must pass SchemaValidator::validate_widget");
}

//  A page with a reserved route is rejected by both UiPage::validate
// and SchemaValidator::validate_page.
//
// The reserved routes exercised here are "/search" and "/admin".
#[test]
fn test_page_with_reserved_route_rejected() {
  let reserved = ["/search", "/admin", "/settings", "/library", "/books"];

  for route in reserved {
    // UiPage::validate path
    let page = make_page("my-page", route);
    let result = page.validate();
    assert!(
      result.is_err(),
      "UiPage::validate must reject reserved route: {route}"
    );
    let msg = result.unwrap_err().to_string();
    assert!(
      msg.contains("conflicts with a built-in app route"),
      "error for {route} must mention 'conflicts with a built-in app route', \
       got: {msg}"
    );

    // SchemaValidator::validate_page path
    let page2 = make_page("my-page", route);
    let result2 = SchemaValidator::validate_page(&page2);
    assert!(
      result2.is_err(),
      "SchemaValidator::validate_page must reject reserved route: {route}"
    );
  }
}

// Sub-paths of reserved routes are also rejected.
#[test]
fn test_page_with_reserved_route_subpath_rejected() {
  let subpaths = [
    "/search/advanced",
    "/admin/users",
    "/settings/theme",
    "/library/foo",
  ];
  for route in subpaths {
    let page = make_page("my-page", route);
    assert!(
      page.validate().is_err(),
      "reserved route sub-path must be rejected: {route}"
    );
  }
}

// A UiWidget whose content contains a DataTable fails validation.
//
// Widgets have no data-fetching mechanism; any data source reference in a
// widget content tree must be caught at load time.
#[test]
fn test_widget_with_datatable_fails_validation() {
  use pinakes_plugin_api::ColumnDef;

  let col: ColumnDef =
    serde_json::from_value(serde_json::json!({"key": "id", "header": "ID"}))
      .unwrap();

  let widget = UiWidget {
    id:      "bad-widget".to_string(),
    target:  "library_header".to_string(),
    content: UiElement::DataTable {
      data:        "items".to_string(),
      columns:     vec![col],
      sortable:    false,
      filterable:  false,
      page_size:   0,
      row_actions: vec![],
    },
  };

  let result = SchemaValidator::validate_widget(&widget);
  assert!(
    result.is_err(),
    "widget with DataTable content must fail validation"
  );
  let msg = result.unwrap_err().to_string();
  assert!(
    msg.contains("cannot reference data sources"),
    "error must mention data sources, got: {msg}"
  );
}

// A UiWidget whose content is a Container wrapping a Loop fails
// validation. Basically a recursive data source check.
#[test]
fn test_widget_container_wrapping_loop_fails_validation() {
  use pinakes_plugin_api::Expression;

  let widget = UiWidget {
    id:      "loop-widget".to_string(),
    target:  "library_header".to_string(),
    content: UiElement::Container {
      children: vec![UiElement::Loop {
        data:     "items".to_string(),
        template: Box::new(UiElement::Text {
          content:    Default::default(),
          variant:    Default::default(),
          allow_html: false,
        }),
        empty:    None,
      }],
      gap:      0,
      padding:  None,
    },
  };

  let result = SchemaValidator::validate_widget(&widget);
  assert!(
    result.is_err(),
    "widget containing a Loop must fail validation"
  );
  let _ = Expression::default(); // Expression should be accessible from the import path
}

// Endpoint data source with a path that does not start with /api/ fails
// UiPage::validate (DataSource::validate is called there).
#[test]
fn test_endpoint_data_source_non_api_path_rejected() {
  let mut page = make_page("my-page", "/plugins/test/page");
  page
    .data_sources
    .insert("items".to_string(), DataSource::Endpoint {
      path:          "/v1/media".to_string(),
      method:        HttpMethod::Get,
      params:        Default::default(),
      poll_interval: 0,
      transform:     None,
    });

  // DataSource::validate requires /api/ prefix
  assert!(
    page.validate().is_err(),
    "data source path not starting with /api/ must be rejected"
  );

  // Also verify SchemaValidator::validate_page rejects it
  let result2 = SchemaValidator::validate_page(&page);
  assert!(
    result2.is_err(),
    "SchemaValidator should reject non-/api/ endpoint path"
  );
}

// A static data source with any value passes validation on its own.
#[test]
fn test_static_data_source_passes_validation() {
  use pinakes_plugin_api::ColumnDef;

  let col: ColumnDef =
    serde_json::from_value(serde_json::json!({"key": "n", "header": "N"}))
      .unwrap();

  let mut page = make_page("my-page", "/plugins/test/page");
  page
    .data_sources
    .insert("nums".to_string(), DataSource::Static {
      value: serde_json::json!([1, 2, 3]),
    });

  // Root element references the static data source so DataTable passes
  page.root_element = UiElement::DataTable {
    data:        "nums".to_string(),
    columns:     vec![col],
    sortable:    false,
    filterable:  false,
    page_size:   0,
    row_actions: vec![],
  };
  page
    .validate()
    .expect("page with static data source must pass validation");
}

// Parse TOML string, validate, and load inline pages round-trips without
// errors.
#[test]
fn test_manifest_inline_page_roundtrip() {
  use pinakes_plugin_api::{PluginManifest, manifest::UiPageEntry};

  let toml = r#"
[plugin]
name = "roundtrip-plugin"
version = "2.3.0"
api_version = "1.0"
kind = ["ui_page"]

[plugin.binary]
wasm = "plugin.wasm"

[[ui.pages]]
id = "overview"
title = "Overview"
route = "/plugins/roundtrip/overview"

[ui.pages.layout]
type = "container"
children = []
gap = 8
"#;

  let manifest = PluginManifest::parse_str(toml).expect("manifest must parse");
  assert_eq!(manifest.plugin.name, "roundtrip-plugin");
  assert_eq!(manifest.ui.pages.len(), 1);

  match &manifest.ui.pages[0] {
    UiPageEntry::Inline(page) => {
      assert_eq!(page.id, "overview");
      assert_eq!(page.route, "/plugins/roundtrip/overview");
      // UiPage::validate must also succeed for inline pages
      page
        .validate()
        .expect("inline page must pass UiPage::validate");
    },
    UiPageEntry::File { .. } => {
      panic!("expected inline page entry, got file reference");
    },
  }
}

// warnings by PluginManifest::validate but do NOT cause an error return.
// (The UiSection::validate failure is non-fatal; see manifest.rs.)
#[test]
fn test_manifest_bad_required_endpoint_is_non_fatal() {
  use pinakes_plugin_api::PluginManifest;

  let toml = r#"
[plugin]
name = "ep-test"
version = "1.0.0"
api_version = "1.0"
kind = ["ui_page"]

[plugin.binary]
wasm = "plugin.wasm"

[ui]
required_endpoints = ["/not-an-api-path"]
"#;

  // PluginManifest::validate emits a tracing::warn for invalid
  // required_endpoints but does not return Err - verify the manifest still
  // parses successfully.
  let result = PluginManifest::parse_str(toml);
  assert!(
    result.is_ok(),
    "bad required_endpoint should be non-fatal for PluginManifest::validate"
  );
}