use std::fs;
use std::path::PathBuf;
use std::time::{SystemTime, UNIX_EPOCH};

use sgclaw::generated_scene::analyzer::SceneKind;
use sgclaw::generated_scene::generator::{generate_scene_package, GenerateSceneRequest};
use sgclaw::generated_scene::ir::{
    ApiEndpointIr, ModeConditionIr, ModeIr, NormalizeRulesIr, SceneIdDiagnosticsIr, SceneIr,
    WorkflowArchetype,
};

fn make_test_mode(
    name: &str,
    url: &str,
    content_type: Option<&str>,
    response_path: &str,
) -> ModeIr {
    ModeIr {
        name: name.to_string(),
        label: Some(name.to_string()),
        condition: Some(ModeConditionIr {
            field: "period_mode".to_string(),
            operator: "equals".to_string(),
            value: serde_json::Value::String(name.to_string()),
        }),
        api_endpoint: Some(ApiEndpointIr {
            name: format!("{}_endpoint", name),
            url: url.to_string(),
            method: "POST".to_string(),
            content_type: content_type.map(|s| s.to_string()),
            description: None,
        }),
        column_defs: vec![("id".to_string(), "ID".to_string())],
        request_template: serde_json::json!({}),
        normalize_rules: Some(NormalizeRulesIr {
            rules_type: "validate_required".to_string(),
            required_fields: vec!["id".to_string()],
            filter_null: true,
        }),
        response_path: response_path.to_string(),
    }
}

fn make_test_scene_ir(modes: Vec<ModeIr>) -> SceneIr {
    let is_multi = modes.len() > 1;
    SceneIr {
        scene_id: "test-scene".to_string(),
        scene_id_diagnostics: SceneIdDiagnosticsIr::default(),
        scene_name: "Test Scene".to_string(),
        scene_kind: "report_collection".to_string(),
        workflow_archetype: Some(if is_multi {
            WorkflowArchetype::MultiModeRequest
        } else {
            WorkflowArchetype::SingleRequestTable
        }),
        bootstrap: Default::default(),
        params: Vec::new(),
        modes,
        default_mode: Some("month".to_string()),
        mode_switch_field: Some("period_mode".to_string()),
        workflow_steps: vec![
            sgclaw::generated_scene::ir::WorkflowStepIr {
                step_type: "request".to_string(),
                description: Some("select mode and query corresponding endpoint".to_string()),
                ..Default::default()
            },
            sgclaw::generated_scene::ir::WorkflowStepIr {
                step_type: "transform".to_string(),
                description: Some("normalize mode-specific table rows".to_string()),
                ..Default::default()
            },
        ],
        workflow_evidence: Default::default(),
        request_template: serde_json::Value::Null,
        response_path: "".to_string(),
        normalize_rules: None,
        artifact_contract: Default::default(),
        validation_hints: Default::default(),
        evidence: Vec::new(),
        readiness: Default::default(),
        api_endpoints: Vec::new(),
        static_params: Default::default(),
        column_defs: Vec::new(),
        confidence: 0.0,
        uncertainties: Vec::new(),
    }
}

fn temp_workspace(prefix: &str) -> PathBuf {
    let nanos = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_nanos();
    let path = std::env::temp_dir().join(format!("{prefix}-{nanos}"));
    fs::create_dir_all(&path).unwrap();
    path
}

/// Test 1: Single mode generates MODES array (routes through compile_multi_mode_request)
#[test]
fn test_single_mode_generates_modes_array() {
    let output_root = temp_workspace("sgclaw-single-mode-test");
    let modes = vec![make_test_mode(
        "month",
        "http://example.com/api/month",
        None,
        "data",
    )];
    let scene_ir = make_test_scene_ir(modes);

    // Use SingleRequestTable archetype - the compile path should auto-wrap into multi-mode
    let mut scene_ir = scene_ir;
    scene_ir.workflow_archetype = Some(WorkflowArchetype::SingleRequestTable);
    // Provide one api_endpoint so ensure_modes_populated works
    scene_ir.api_endpoints = vec![ApiEndpointIr {
        name: "default_endpoint".to_string(),
        url: "http://example.com/api/data".to_string(),
        method: "POST".to_string(),
        content_type: None,
        description: None,
    }];

    generate_scene_package(GenerateSceneRequest {
        source_dir: PathBuf::from("tests/fixtures/generated_scene/report_collection"),
        scene_id: "single-mode-scene".to_string(),
        scene_name: "Single Mode Scene".to_string(),
        scene_kind: Some(SceneKind::ReportCollection),
        target_url: None,
        output_root: output_root.clone(),
        lessons_path: None,
        scene_info_json: None,
        scene_ir_json: Some(scene_ir),
    })
    .unwrap();

    let skill_root = output_root.join("skills/single-mode-scene");
    let generated_script =
        fs::read_to_string(skill_root.join("scripts/collect_single_mode_scene.js")).unwrap();

    assert!(
        generated_script.contains("const MODES ="),
        "Generated JS should contain 'const MODES =' since SingleRequestTable routes through compile_multi_mode_request"
    );
}

/// Test 2: Multi-mode generates mode routing (detectMode and MODES.find)
#[test]
fn test_multi_mode_generates_mode_routing() {
    let output_root = temp_workspace("sgclaw-multi-mode-test");
    let modes = vec![
        make_test_mode(
            "month",
            "http://example.com/api/month",
            None,
            "data",
        ),
        make_test_mode(
            "week",
            "http://example.com/api/week",
            None,
            "data",
        ),
    ];
    let scene_ir = make_test_scene_ir(modes);

    generate_scene_package(GenerateSceneRequest {
        source_dir: PathBuf::from("tests/fixtures/generated_scene/report_collection"),
        scene_id: "multi-mode-scene".to_string(),
        scene_name: "Multi Mode Scene".to_string(),
        scene_kind: Some(SceneKind::ReportCollection),
        target_url: None,
        output_root: output_root.clone(),
        lessons_path: None,
        scene_info_json: None,
        scene_ir_json: Some(scene_ir),
    })
    .unwrap();

    let skill_root = output_root.join("skills/multi-mode-scene");
    let generated_script =
        fs::read_to_string(skill_root.join("scripts/collect_multi_mode_scene.js")).unwrap();

    assert!(
        generated_script.contains("function detectMode"),
        "Generated JS should contain 'detectMode' function for multi-mode routing"
    );
    assert!(
        generated_script.contains("MODES.find"),
        "Generated JS should contain 'MODES.find' for mode selection"
    );
}

/// Test 3: Form-urlencoded request body uses Object.entries().join('&') not JSON.stringify
#[test]
fn test_form_urlencoded_request_body() {
    let output_root = temp_workspace("sgclaw-form-urlencoded-test");
    let modes = vec![make_test_mode(
        "month",
        "http://example.com/api/month",
        Some("application/x-www-form-urlencoded"),
        "data",
    )];
    let scene_ir = make_test_scene_ir(modes);

    generate_scene_package(GenerateSceneRequest {
        source_dir: PathBuf::from("tests/fixtures/generated_scene/report_collection"),
        scene_id: "form-urlencoded-scene".to_string(),
        scene_name: "Form URL Encoded Scene".to_string(),
        scene_kind: Some(SceneKind::ReportCollection),
        target_url: None,
        output_root: output_root.clone(),
        lessons_path: None,
        scene_info_json: None,
        scene_ir_json: Some(scene_ir),
    })
    .unwrap();

    let skill_root = output_root.join("skills/form-urlencoded-scene");
    let generated_script =
        fs::read_to_string(skill_root.join("scripts/collect_form_urlencoded_scene.js")).unwrap();

    // The buildModeRequest function should use Object.entries for form-urlencoded
    assert!(
        generated_script.contains("Object.entries(requestBody)"),
        "Generated JS should use Object.entries for form-urlencoded body encoding"
    );
    assert!(
        generated_script.contains(".join('&')"),
        "Generated JS should join form-urlencoded entries with '&'"
    );
    // Verify the conditional exists in buildModeRequest
    assert!(
        generated_script.contains("application/x-www-form-urlencoded"),
        "Generated JS should reference form-urlencoded content type"
    );
}

/// Test 4: Response path extraction uses mode.responsePath in the template
#[test]
fn test_response_path_extraction_in_template() {
    let output_root = temp_workspace("sgclaw-response-path-test");
    let modes = vec![make_test_mode(
        "month",
        "http://example.com/api/month",
        None,
        "data.list",
    )];
    let scene_ir = make_test_scene_ir(modes);

    generate_scene_package(GenerateSceneRequest {
        source_dir: PathBuf::from("tests/fixtures/generated_scene/report_collection"),
        scene_id: "response-path-scene".to_string(),
        scene_name: "Response Path Scene".to_string(),
        scene_kind: Some(SceneKind::ReportCollection),
        target_url: None,
        output_root: output_root.clone(),
        lessons_path: None,
        scene_info_json: None,
        scene_ir_json: Some(scene_ir),
    })
    .unwrap();

    let skill_root = output_root.join("skills/response-path-scene");
    let generated_script =
        fs::read_to_string(skill_root.join("scripts/collect_response_path_scene.js")).unwrap();

    // The multi-mode template uses mode.responsePath for response extraction
    assert!(
        generated_script.contains("mode.responsePath"),
        "Generated JS should use 'mode.responsePath' for per-mode response extraction"
    );
    // The safeGet call should reference the mode's responsePath
    assert!(
        generated_script.contains("safeGet(raw, mode.responsePath"),
        "Generated JS should call safeGet with mode.responsePath"
    );
}

/// Test 5: processData flag in $.ajax call with correct conditional
#[test]
fn test_process_data_flag_in_ajax() {
    let output_root = temp_workspace("sgclaw-process-data-test");
    let modes = vec![make_test_mode(
        "month",
        "http://example.com/api/month",
        Some("application/x-www-form-urlencoded"),
        "data",
    )];
    let scene_ir = make_test_scene_ir(modes);

    generate_scene_package(GenerateSceneRequest {
        source_dir: PathBuf::from("tests/fixtures/generated_scene/report_collection"),
        scene_id: "process-data-scene".to_string(),
        scene_name: "Process Data Scene".to_string(),
        scene_kind: Some(SceneKind::ReportCollection),
        target_url: None,
        output_root: output_root.clone(),
        lessons_path: None,
        scene_info_json: None,
        scene_ir_json: Some(scene_ir),
    })
    .unwrap();

    let skill_root = output_root.join("skills/process-data-scene");
    let generated_script =
        fs::read_to_string(skill_root.join("scripts/collect_process_data_scene.js")).unwrap();

    // The $.ajax call should contain processData flag
    assert!(
        generated_script.contains("processData:"),
        "Generated JS $.ajax call should contain 'processData:' flag"
    );
    // processData should be false for form-urlencoded (negated condition)
    assert!(
        generated_script.contains("processData: request.headers['Content-Type'] !== 'application/x-www-form-urlencoded'"),
        "Generated JS should set processData to false for form-urlencoded content type"
    );
}