// ABOUTME: Tests for MCP (Model Context Protocol) server implementation
// ABOUTME: Validates MCP tool functionality and server initialization

use micropub::mcp::MicropubMcp;

#[test]
fn test_mcp_server_creation() {
    // RED: This should fail because the module isn't enabled yet
    let server = MicropubMcp::new();
    assert!(server.is_ok(), "MCP server should initialize successfully");
}

#[tokio::test]
async fn test_whoami_returns_profile_info() {
    // RED: Test the whoami tool
    let _server = MicropubMcp::new().expect("Server should initialize");

    // This tests that whoami doesn't panic and returns a result
    // We can't test exact output since it depends on user's config
    // but we can verify it executes without error

    // Note: This will be updated once we can actually call the tool
    // For now, just verify server exists
    // TODO: Implement actual whoami tool test
}

#[tokio::test]
async fn test_create_draft_tool() {
    // RED: Test creating a draft via MCP
    let _server = MicropubMcp::new().expect("Server should initialize");

    // TODO: Implement actual create_draft tool test
}

#[tokio::test]
async fn test_list_drafts_tool() {
    // RED: Test listing drafts via MCP
    let _server = MicropubMcp::new().expect("Server should initialize");

    // TODO: Implement actual list_drafts tool test
}

#[tokio::test]
async fn test_publish_post_tool() {
    // RED: Test publishing via MCP
    let _server = MicropubMcp::new().expect("Server should initialize");

    // TODO: Implement actual publish_post tool test
}

#[tokio::test]
async fn test_publish_backdate_tool_with_valid_date() {
    // RED: Test backdating with valid ISO 8601 date
    let _server = MicropubMcp::new().expect("Server should initialize");

    // TODO: Implement actual publish_backdate tool test
}

#[tokio::test]
async fn test_delete_post_tool() {
    // RED: Test deleting a post via MCP
    let _server = MicropubMcp::new().expect("Server should initialize");

    // TODO: Implement actual delete_post tool test
}

#[test]
fn test_upload_media_requires_file_path_or_data() {
    // Missing both file_path and file_data should fail validation
    let json = r#"{}"#;
    let result: Result<serde_json::Value, _> = serde_json::from_str(json);
    assert!(result.is_ok()); // JSON is valid but semantically incomplete
}

#[test]
fn test_upload_media_file_data_requires_filename() {
    // Having file_data without filename should fail
    let json = r#"{"file_data": "base64data"}"#;
    let result: Result<serde_json::Value, _> = serde_json::from_str(json);
    assert!(result.is_ok()); // JSON is valid but semantically incomplete
}

// Note: This is a basic structure test, not a full integration test
// Full integration would require mocking HTTP endpoints
#[test]
fn test_upload_media_validates_file_path_format() {
    use serde_json::json;

    let args = json!({
        "file_path": "~/test.jpg"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
}

#[test]
fn test_upload_media_base64_requires_filename() {
    use serde_json::json;

    let args_without_filename = json!({
        "file_data": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg=="
    });

    // Should be valid JSON but semantically incomplete
    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args_without_filename);
    assert!(parsed.is_ok());
}

#[test]
fn test_upload_media_markdown_with_alt_text() {
    use serde_json::json;

    // Simulate the response structure with alt text
    let response = json!({
        "url": "https://example.com/media/photo.jpg",
        "filename": "photo.jpg",
        "mime_type": "image/jpeg",
        "markdown": "![My photo description](https://example.com/media/photo.jpg)"
    });

    // Verify markdown format includes alt text
    let markdown = response["markdown"].as_str().unwrap();
    assert!(markdown.starts_with("![My photo description]"));
    assert!(markdown.contains("https://example.com/media/photo.jpg"));
    assert_eq!(
        markdown,
        "![My photo description](https://example.com/media/photo.jpg)"
    );
}

#[test]
fn test_upload_media_markdown_without_alt_text() {
    use serde_json::json;

    // Simulate the response structure without alt text
    let response = json!({
        "url": "https://example.com/media/photo.jpg",
        "filename": "photo.jpg",
        "mime_type": "image/jpeg",
        "markdown": "![](https://example.com/media/photo.jpg)"
    });

    // Verify markdown format has empty alt text
    let markdown = response["markdown"].as_str().unwrap();
    assert!(markdown.starts_with("![]"));
    assert!(markdown.contains("https://example.com/media/photo.jpg"));
    assert_eq!(markdown, "![](https://example.com/media/photo.jpg)");
}

#[test]
fn test_upload_media_json_response_structure() {
    use serde_json::json;

    // Simulate the complete response structure
    let response = json!({
        "url": "https://example.com/media/photo.jpg",
        "filename": "photo.jpg",
        "mime_type": "image/jpeg",
        "markdown": "![](https://example.com/media/photo.jpg)"
    });

    // Verify all required fields are present
    assert!(response["url"].is_string());
    assert!(response["filename"].is_string());
    assert!(response["mime_type"].is_string());
    assert!(response["markdown"].is_string());

    // Verify values are correct types and format
    assert_eq!(
        response["url"].as_str().unwrap(),
        "https://example.com/media/photo.jpg"
    );
    assert_eq!(response["filename"].as_str().unwrap(), "photo.jpg");
    assert_eq!(response["mime_type"].as_str().unwrap(), "image/jpeg");
    assert_eq!(
        response["markdown"].as_str().unwrap(),
        "![](https://example.com/media/photo.jpg)"
    );
}

#[test]
fn test_upload_media_validation_missing_both_file_inputs() {
    use serde_json::json;

    // Missing both file_path and file_data should be invalid
    let args = json!({
        "alt_text": "Some description"
    });

    // JSON parsing succeeds, but semantic validation should fail
    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());

    // This test verifies the structure - actual validation happens in upload_media
    // which should return an error: "Must provide either file_path OR file_data"
}

#[test]
fn test_upload_media_validation_both_file_inputs_provided() {
    use serde_json::json;

    // Providing both file_path and file_data should be invalid
    let args = json!({
        "file_path": "~/photo.jpg",
        "file_data": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==",
        "filename": "photo.jpg"
    });

    // JSON parsing succeeds, but semantic validation should fail
    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());

    // This test verifies the structure - actual validation happens in upload_media
    // which should return an error: "Cannot provide both file_path and file_data"
}

#[test]
fn test_upload_media_validation_file_data_without_filename() {
    use serde_json::json;

    // file_data without filename should be invalid
    let args = json!({
        "file_data": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg=="
    });

    // JSON parsing succeeds, but semantic validation should fail
    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());

    // This test verifies the structure - actual validation happens in upload_media
    // which should return an error: "filename is required when using file_data"
}

// ============================================================================
// PHASE 1: Push Draft Parameter Validation Tests
// ============================================================================

#[test]
fn test_push_draft_requires_draft_id() {
    use serde_json::json;

    // Missing draft_id should fail
    let args = json!({});

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok()); // JSON valid but missing required field
}

#[test]
fn test_push_draft_validates_draft_id_not_empty() {
    use serde_json::json;

    // Empty draft_id should be rejected
    let args = json!({
        "draft_id": ""
    });

    // Verify empty string is present
    assert_eq!(args["draft_id"].as_str().unwrap(), "");

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
}

#[test]
fn test_push_draft_rejects_special_characters() {
    use serde_json::json;

    // Draft IDs with special characters should be rejected
    let invalid_ids = vec![
        "draft/123",     // forward slash
        "draft\\123",    // backslash
        "draft..123",    // double dots
        "../etc/passwd", // path traversal
        "draft#123",     // hash
        "draft@123",     // at sign
        "draft 123",     // space
    ];

    for id in invalid_ids {
        let args = json!({
            "draft_id": id
        });

        let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
        assert!(parsed.is_ok());
        // Actual validation happens in push_draft which should reject these
    }
}

#[test]
fn test_push_draft_accepts_valid_draft_ids() {
    use serde_json::json;

    // Valid draft IDs should be accepted
    let valid_ids = vec![
        "abc123",
        "my-draft",
        "my_draft",
        "draft-2024-12-06",
        "DRAFT123",
        "draft_with_underscores",
    ];

    for id in valid_ids {
        let args = json!({
            "draft_id": id
        });

        let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
        assert!(parsed.is_ok());
    }
}

#[test]
fn test_push_draft_with_backdate() {
    use serde_json::json;

    // Valid ISO 8601 backdate should be accepted
    let args = json!({
        "draft_id": "abc123",
        "backdate": "2024-01-15T10:00:00Z"
    });

    // Verify backdate is present and correct
    assert_eq!(args["backdate"].as_str().unwrap(), "2024-01-15T10:00:00Z");

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
}

#[test]
fn test_push_draft_backdate_validates_iso8601_format() {
    use serde_json::json;

    // Various ISO 8601 formats that should be valid
    let valid_dates = vec![
        "2024-01-15T10:00:00Z",
        "2024-12-06T14:30:00+00:00",
        "2024-12-06T14:30:00-05:00",
    ];

    for date in valid_dates {
        let args = json!({
            "draft_id": "abc123",
            "backdate": date
        });

        let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
        assert!(parsed.is_ok());
    }
}

#[test]
fn test_push_draft_backdate_rejects_invalid_formats() {
    use serde_json::json;

    // Invalid date formats
    let invalid_dates = vec![
        "2024-01-15",           // Missing time
        "01/15/2024",           // Wrong format
        "2024-13-01T10:00:00Z", // Invalid month
        "not-a-date",           // Not a date at all
        "2024-01-32T10:00:00Z", // Invalid day
    ];

    for date in invalid_dates {
        let args = json!({
            "draft_id": "abc123",
            "backdate": date
        });

        let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
        assert!(parsed.is_ok());
        // Actual date parsing validation happens in push_draft
    }
}

#[test]
fn test_push_draft_backdate_is_optional() {
    use serde_json::json;

    // Backdate should be optional
    let args = json!({
        "draft_id": "abc123"
    });

    // Verify no backdate field
    assert!(args["backdate"].is_null());

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
}

// ============================================================================
// PHASE 2: Response Structure Tests
// ============================================================================

#[test]
fn test_push_draft_response_structure() {
    use serde_json::json;

    // Simulate complete response structure
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": false,
        "status": "server-draft",
        "uploaded_media": []
    });

    // Verify all required fields are present
    assert!(response["url"].is_string());
    assert!(response["is_update"].is_boolean());
    assert!(response["status"].is_string());
    assert!(response["uploaded_media"].is_array());

    // Verify values
    assert_eq!(response["url"], "https://example.com/posts/draft-123");
    assert_eq!(response["is_update"], false);
    assert_eq!(response["status"], "server-draft");
    assert!(response["uploaded_media"].is_array());
}

#[test]
fn test_push_draft_response_is_update_true() {
    use serde_json::json;

    // Response when updating an existing draft
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": true,
        "status": "server-draft",
        "uploaded_media": []
    });

    assert_eq!(response["is_update"], true);
}

#[test]
fn test_push_draft_response_with_uploaded_media() {
    use serde_json::json;

    // Response with uploaded media files
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": false,
        "status": "server-draft",
        "uploaded_media": [
            {
                "filename": "photo.jpg",
                "url": "https://example.com/media/photo.jpg"
            },
            {
                "filename": "image.png",
                "url": "https://example.com/media/image.png"
            }
        ]
    });

    // Verify uploaded_media structure
    let media = response["uploaded_media"].as_array().unwrap();
    assert_eq!(media.len(), 2);

    // Verify first media item
    assert_eq!(media[0]["filename"], "photo.jpg");
    assert_eq!(media[0]["url"], "https://example.com/media/photo.jpg");

    // Verify second media item
    assert_eq!(media[1]["filename"], "image.png");
    assert_eq!(media[1]["url"], "https://example.com/media/image.png");
}

#[test]
fn test_push_draft_response_status_always_server_draft() {
    use serde_json::json;

    // Status should always be "server-draft" for push_draft responses
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": false,
        "status": "server-draft",
        "uploaded_media": []
    });

    assert_eq!(response["status"], "server-draft");
    assert_ne!(response["status"], "published");
}

#[test]
fn test_push_draft_response_url_format() {
    use serde_json::json;

    // URL should be a valid URL string
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": false,
        "status": "server-draft",
        "uploaded_media": []
    });

    let url = response["url"].as_str().unwrap();
    assert!(url.starts_with("https://") || url.starts_with("http://"));
}

#[test]
fn test_push_draft_response_uploaded_media_empty_array() {
    use serde_json::json;

    // When no media is uploaded, uploaded_media should be empty array, not null
    let response = json!({
        "url": "https://example.com/posts/draft-123",
        "is_update": false,
        "status": "server-draft",
        "uploaded_media": []
    });

    assert!(response["uploaded_media"].is_array());
    assert_eq!(response["uploaded_media"].as_array().unwrap().len(), 0);
    assert!(!response["uploaded_media"].is_null());
}

// ============================================================================
// PHASE 3: Error Message Tests
// ============================================================================

#[test]
fn test_push_draft_error_message_empty_draft_id() {
    // Simulate error message for empty draft_id
    let error_message = "Draft ID cannot be empty";

    // Verify error message is clear and actionable
    assert!(error_message.contains("Draft ID"));
    assert!(error_message.contains("empty"));
}

#[test]
fn test_push_draft_error_message_invalid_characters() {
    // Simulate error message for invalid characters
    let error_message =
        "Draft ID must contain only alphanumeric characters, hyphens, and underscores";

    // Verify error message explains what is allowed
    assert!(error_message.contains("alphanumeric"));
    assert!(error_message.contains("hyphens"));
    assert!(error_message.contains("underscores"));
}

#[test]
fn test_push_draft_error_message_invalid_backdate() {
    // Simulate error message for invalid backdate format
    let error_message = "Invalid backdate format: input contains invalid characters. Use ISO 8601 like 2024-01-15T10:30:00Z";

    // Verify error message provides example format
    assert!(error_message.contains("Invalid backdate"));
    assert!(error_message.contains("ISO 8601"));
    assert!(error_message.contains("2024-01-15T10:30:00Z"));
}

#[test]
fn test_push_draft_error_message_push_failed() {
    // Simulate error message for general push failure
    let error_message = "Failed to push draft: Network error";

    // Verify error message is descriptive
    assert!(error_message.contains("Failed to push draft"));
}

#[test]
fn test_push_draft_error_codes_are_appropriate() {
    use serde_json::json;

    // Simulate different error types with appropriate codes
    let validation_error = json!({
        "code": "invalid_params",
        "message": "Draft ID cannot be empty"
    });

    let internal_error = json!({
        "code": "internal_error",
        "message": "Failed to push draft: Network error"
    });

    // Verify error codes
    assert_eq!(validation_error["code"], "invalid_params");
    assert_eq!(internal_error["code"], "internal_error");
}

// ============================================================================
// Undelete Post Tests
// ============================================================================

#[test]
fn test_undelete_post_args_deserialize() {
    use serde_json::json;

    let args = json!({
        "url": "https://example.com/post/1"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    assert_eq!(parsed.unwrap()["url"], "https://example.com/post/1");
}

#[test]
fn test_undelete_post_rejects_empty_url() {
    use serde_json::json;

    let args = json!({
        "url": ""
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    assert_eq!(parsed.unwrap()["url"], "");
}

// ============================================================================
// Update Post Tests
// ============================================================================

#[test]
fn test_update_post_args_with_all_fields() {
    use serde_json::json;

    let args = json!({
        "url": "https://example.com/post/1",
        "content": "Updated content",
        "title": "Updated Title",
        "categories": "tech, rust"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    let val = parsed.unwrap();
    assert_eq!(val["url"], "https://example.com/post/1");
    assert_eq!(val["content"], "Updated content");
    assert_eq!(val["title"], "Updated Title");
    assert_eq!(val["categories"], "tech, rust");
}

#[test]
fn test_update_post_args_url_only() {
    use serde_json::json;

    let args = json!({
        "url": "https://example.com/post/1"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
}

#[test]
fn test_update_post_rejects_empty_url() {
    use serde_json::json;

    let args = json!({
        "url": "",
        "content": "new content"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    assert_eq!(parsed.unwrap()["url"], "");
}

// ============================================================================
// Edit Draft Tests
// ============================================================================

#[test]
fn test_edit_draft_args_with_all_fields() {
    use serde_json::json;

    let args = json!({
        "draft_id": "abc123",
        "content": "Updated draft content",
        "title": "Updated Draft Title",
        "categories": "blog, update"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    let val = parsed.unwrap();
    assert_eq!(val["draft_id"], "abc123");
    assert_eq!(val["content"], "Updated draft content");
    assert_eq!(val["title"], "Updated Draft Title");
    assert_eq!(val["categories"], "blog, update");
}

#[test]
fn test_edit_draft_rejects_path_traversal() {
    use serde_json::json;

    let invalid_ids = vec!["../etc/passwd", "draft/../../secret", "draft..id"];

    for id in invalid_ids {
        let args = json!({
            "draft_id": id,
            "content": "new content"
        });
        let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
        assert!(parsed.is_ok());
        // Actual path traversal validation happens in edit_draft via validate_draft_id
    }
}

#[test]
fn test_edit_draft_requires_at_least_one_field() {
    use serde_json::json;

    let args = json!({
        "draft_id": "abc123"
    });

    let parsed: Result<serde_json::Value, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    // Actual validation that at least one of content/title/categories is provided
    // happens in edit_draft tool function
}

#[test]
fn test_edit_draft_args_content_only() {
    use serde_json::json;

    let args = json!({
        "draft_id": "abc123",
        "content": "Only updating content"
    });

    let parsed: Result<micropub::mcp::EditDraftArgs, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    let val = parsed.unwrap();
    assert_eq!(val.draft_id, "abc123");
    assert_eq!(val.content.unwrap(), "Only updating content");
    assert!(val.title.is_none());
    assert!(val.categories.is_none());
}

#[test]
fn test_edit_draft_args_title_only() {
    use serde_json::json;

    let args = json!({
        "draft_id": "abc123",
        "title": "Only updating title"
    });

    let parsed: Result<micropub::mcp::EditDraftArgs, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    let val = parsed.unwrap();
    assert_eq!(val.draft_id, "abc123");
    assert!(val.content.is_none());
    assert_eq!(val.title.unwrap(), "Only updating title");
    assert!(val.categories.is_none());
}

#[test]
fn test_edit_draft_args_categories_only() {
    use serde_json::json;

    let args = json!({
        "draft_id": "abc123",
        "categories": "rust, programming"
    });

    let parsed: Result<micropub::mcp::EditDraftArgs, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    let val = parsed.unwrap();
    assert_eq!(val.draft_id, "abc123");
    assert!(val.content.is_none());
    assert!(val.title.is_none());
    assert_eq!(val.categories.unwrap(), "rust, programming");
}

// ============================================================================
// Search Drafts Tests
// ============================================================================

#[test]
fn test_search_drafts_args_deserialize() {
    use serde_json::json;

    let args = json!({
        "query": "rust programming"
    });

    let parsed: Result<micropub::mcp::SearchDraftsArgs, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    assert_eq!(parsed.unwrap().query, "rust programming");
}

#[test]
fn test_search_drafts_rejects_empty_query() {
    use serde_json::json;

    let args = json!({
        "query": ""
    });

    let parsed: Result<micropub::mcp::SearchDraftsArgs, _> = serde_json::from_value(args);
    assert!(parsed.is_ok());
    assert_eq!(parsed.unwrap().query, "");
}

#[test]
fn test_push_draft_error_messages_are_user_friendly() {
    // Error messages should be clear and actionable, not technical jargon
    let errors = vec![
        "Draft ID cannot be empty",
        "Draft ID must contain only alphanumeric characters, hyphens, and underscores",
        "Invalid backdate format: input contains invalid characters. Use ISO 8601 like 2024-01-15T10:30:00Z",
        "Failed to push draft: Network error",
    ];

    for error in errors {
        // Should not contain technical stack traces or debug info
        assert!(!error.contains("panic"));
        assert!(!error.contains("unwrap"));
        assert!(!error.contains("expect"));

        // Should be concise (under 200 chars is reasonable)
        assert!(error.len() < 200);
    }
}
