use dioxus::prelude::*;

use super::helpers::*;

/// (phase_index, steps, findings_count, has_failed, has_running, all_done)
type PhaseData<'a> = (usize, Vec<&'a serde_json::Value>, usize, bool, bool, bool);

#[component]
pub fn AttackChainView(
    steps: Vec<serde_json::Value>,
    is_running: bool,
    session_findings: usize,
    session_tool_invocations: usize,
    session_success_rate: f64,
) -> Element {
    let phases = compute_phases(&steps);

    // Compute KPIs — prefer session-level stats, fall back to node-level
    let total_tools = steps.len();
    let node_findings: usize = steps
        .iter()
        .map(|s| {
            s.get("findings_produced")
                .and_then(|v| v.as_array())
                .map(|a| a.len())
                .unwrap_or(0)
        })
        .sum();
    // Use session-level findings count if nodes don't have findings linked
    let total_findings = if node_findings > 0 {
        node_findings
    } else {
        session_findings
    };

    let completed_count = steps
        .iter()
        .filter(|s| s.get("status").and_then(|v| v.as_str()) == Some("completed"))
        .count();
    let failed_count = steps
        .iter()
        .filter(|s| s.get("status").and_then(|v| v.as_str()) == Some("failed"))
        .count();
    let finished = completed_count + failed_count;
    let success_pct = if finished == 0 {
        100
    } else {
        (completed_count * 100) / finished
    };
    let max_risk: u8 = steps
        .iter()
        .filter_map(|s| s.get("risk_score").and_then(|v| v.as_u64()))
        .map(|v| v as u8)
        .max()
        .unwrap_or(0);

    let progress_pct = if total_tools == 0 {
        0
    } else {
        ((completed_count + failed_count) * 100) / total_tools
    };

    // Build phase data for rail and accordion
    let phase_data: Vec<PhaseData<'_>> = phases
        .iter()
        .enumerate()
        .map(|(pi, indices)| {
            let phase_steps: Vec<&serde_json::Value> = indices.iter().map(|&i| &steps[i]).collect();
            let phase_findings: usize = phase_steps
                .iter()
                .map(|s| {
                    s.get("findings_produced")
                        .and_then(|v| v.as_array())
                        .map(|a| a.len())
                        .unwrap_or(0)
                })
                .sum();
            let has_failed = phase_steps
                .iter()
                .any(|s| s.get("status").and_then(|v| v.as_str()) == Some("failed"));
            let has_running = phase_steps
                .iter()
                .any(|s| s.get("status").and_then(|v| v.as_str()) == Some("running"));
            let all_done = phase_steps.iter().all(|s| {
                let st = s.get("status").and_then(|v| v.as_str()).unwrap_or("");
                st == "completed" || st == "failed" || st == "skipped"
            });
            (
                pi,
                phase_steps,
                phase_findings,
                has_failed,
                has_running,
                all_done,
            )
        })
        .collect();

    let mut active_rail = use_signal(|| 0usize);

    rsx! {
        // KPI bar
        div { class: "ac-kpi-bar",
            div { class: "ac-kpi-card",
                div { class: "ac-kpi-value", style: "color: var(--text-primary);", "{total_tools}" }
                div { class: "ac-kpi-label", "Tools Run" }
            }
            div { class: "ac-kpi-card",
                div { class: "ac-kpi-value", style: "color: var(--danger, #dc2626);", "{total_findings}" }
                div { class: "ac-kpi-label", "Findings" }
            }
            div { class: "ac-kpi-card",
                div { class: "ac-kpi-value", style: "color: var(--success, #16a34a);", "{success_pct}%" }
                div { class: "ac-kpi-label", "Success Rate" }
            }
            div { class: "ac-kpi-card",
                div { class: "ac-kpi-value", style: "color: var(--warning, #d97706);", "{max_risk}" }
                div { class: "ac-kpi-label", "Max Risk" }
            }
        }

        // Phase rail
        div { class: "ac-phase-rail",
            for (pi, (_phase_idx, phase_steps, phase_findings, has_failed, has_running, all_done)) in phase_data.iter().enumerate() {
                {
                    if pi > 0 {
                        let prev_done = phase_data.get(pi - 1).map(|p| p.5).unwrap_or(false);
                        let bar_class = if prev_done && *all_done {
                            "done"
                        } else if prev_done {
                            "running"
                        } else {
                            ""
                        };
                        rsx! {
                            div { class: "ac-rail-bar",
                                div { class: "ac-rail-bar-inner {bar_class}" }
                            }
                        }
                    } else {
                        rsx! {}
                    }
                }
                {
                    let dot_class = if *has_running {
                        "running"
                    } else if *has_failed && *all_done {
                        "mixed"
                    } else if *all_done {
                        "done"
                    } else {
                        "pending"
                    };
                    let is_active = *active_rail.read() == pi;
                    let active_cls = if is_active { " active" } else { "" };
                    let findings_cls = if *phase_findings > 0 { "has" } else { "none" };
                    let findings_text = if *phase_findings > 0 {
                        format!("{phase_findings}")
                    } else {
                        "\u{2014}".to_string()
                    };
                    let short = phase_short_name(pi);

                    rsx! {
                        div {
                            class: "ac-rail-node{active_cls}",
                            onclick: move |_| {
                                active_rail.set(pi);
                                let js = format!(
                                    "document.getElementById('ac-phase-{pi}')?.scrollIntoView({{behavior:'smooth',block:'nearest'}});document.getElementById('ac-phase-{pi}')?.classList.add('open');"
                                );
                                document::eval(&js);
                            },
                            div { class: "ac-rail-dot {dot_class}" }
                            div { class: "ac-rail-label", "{short}" }
                            div { class: "ac-rail-findings {findings_cls}", "{findings_text}" }
                            div { class: "ac-rail-heatmap",
                                for step in phase_steps.iter() {
                                    {
                                        let st = step.get("status").and_then(|v| v.as_str()).unwrap_or("pending");
                                        let hm_cls = match st {
                                            "completed" => "ok",
                                            "failed" => "fail",
                                            "running" => "run",
                                            _ => "wait",
                                        };
                                        rsx! { div { class: "ac-hm-cell {hm_cls}" } }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        // Progress bar
        div { class: "ac-progress-track",
            div { class: "ac-progress-fill", style: "width: {progress_pct}%;" }
        }

        // Expand all
        div { class: "ac-controls",
            button {
                class: "ac-btn-toggle",
                onclick: move |_| {
                    document::eval(
                        "document.querySelectorAll('.ac-phase').forEach(p => p.classList.toggle('open', !document.querySelector('.ac-phase.open') || !document.querySelectorAll('.ac-phase:not(.open)').length === 0));(function(){var ps=document.querySelectorAll('.ac-phase');var allOpen=Array.from(ps).every(p=>p.classList.contains('open'));ps.forEach(p=>{if(allOpen)p.classList.remove('open');else p.classList.add('open');});})();"
                    );
                },
                "Expand all"
            }
        }

        // Phase accordion
        div { class: "ac-phases",
            for (pi, (_, phase_steps, phase_findings, _has_failed, has_running, _all_done)) in phase_data.iter().enumerate() {
                {
                    let open_cls = if pi == 0 { " open" } else { "" };
                    let phase_label = phase_name(pi);
                    let tool_count = phase_steps.len();
                    let meta_text = if *has_running {
                        "in progress".to_string()
                    } else {
                        format!("{phase_findings} findings")
                    };
                    let meta_cls = if *has_running { "running-ct" } else { "findings-ct" };
                    let phase_num_label = format!("PHASE {}", pi + 1);
                    let phase_el_id = format!("ac-phase-{pi}");
                    let phase_el_id2 = phase_el_id.clone();

                    rsx! {
                        div {
                            class: "ac-phase{open_cls}",
                            id: "{phase_el_id}",
                            div {
                                class: "ac-phase-header",
                                onclick: move |_| {
                                    let js = format!("document.getElementById('{phase_el_id2}').classList.toggle('open');");
                                    document::eval(&js);
                                },
                                span { class: "ac-phase-num", "{phase_num_label}" }
                                span { class: "ac-phase-title", "{phase_label}" }
                                div { class: "ac-phase-dots",
                                    for step in phase_steps.iter() {
                                        {
                                            let st = step.get("status").and_then(|v| v.as_str()).unwrap_or("pending");
                                            rsx! { div { class: "ac-phase-dot {st}" } }
                                        }
                                    }
                                }
                                div { class: "ac-phase-meta",
                                    span { "{tool_count} tools" }
                                    span { class: "{meta_cls}", "{meta_text}" }
                                }
                                span { class: "ac-phase-chevron", "\u{25B8}" }
                            }
                            div { class: "ac-phase-body",
                                div { class: "ac-phase-body-inner",
                                    for step in phase_steps.iter() {
                                        {
                                            let tool_name_val = step.get("tool_name").and_then(|v| v.as_str()).unwrap_or("Unknown").to_string();
                                            let status = step.get("status").and_then(|v| v.as_str()).unwrap_or("pending").to_string();
                                            let cat = tool_category(&tool_name_val);
                                            let emoji = tool_emoji(cat);
                                            let label = cat_label(cat);
                                            let findings_n = step.get("findings_produced").and_then(|v| v.as_array()).map(|a| a.len()).unwrap_or(0);
                                            let risk = step.get("risk_score").and_then(|v| v.as_u64()).map(|v| v as u8);
                                            let reasoning = step.get("llm_reasoning").and_then(|v| v.as_str()).unwrap_or("").to_string();
                                            let duration = compute_duration(step);
                                            let started = step.get("started_at").map(format_bson_time).unwrap_or_default();

                                            let is_pending = status == "pending";
                                            let pending_cls = if is_pending { " is-pending" } else { "" };

                                            let duration_cls = if status == "running" { "ac-tool-duration running-text" } else { "ac-tool-duration" };
                                            let duration_text = if status == "running" {
                                                "running\u{2026}".to_string()
                                            } else if duration.is_empty() {
                                                "\u{2014}".to_string()
                                            } else {
                                                duration
                                            };

                                            let pill_cls = if findings_n > 0 { "ac-findings-pill has" } else { "ac-findings-pill zero" };
                                            let pill_text = if findings_n > 0 { format!("{findings_n}") } else { "\u{2014}".to_string() };

                                            let (risk_cls, risk_text) = match risk {
                                                Some(r) if r >= 75 => ("ac-risk-val high", format!("{r}")),
                                                Some(r) if r >= 40 => ("ac-risk-val medium", format!("{r}")),
                                                Some(r) => ("ac-risk-val low", format!("{r}")),
                                                None => ("ac-risk-val none", "\u{2014}".to_string()),
                                            };

                                            let node_id = step.get("node_id").and_then(|v| v.as_str()).unwrap_or("").to_string();
                                            let detail_id = format!("ac-detail-{node_id}");
                                            let row_id = format!("ac-row-{node_id}");
                                            let detail_id_clone = detail_id.clone();

                                            rsx! {
                                                div {
                                                    class: "ac-tool-row{pending_cls}",
                                                    id: "{row_id}",
                                                    onclick: move |_| {
                                                        if is_pending { return; }
                                                        let js = format!(
                                                            "(function(){{var r=document.getElementById('{row_id}');var d=document.getElementById('{detail_id}');if(r.classList.contains('expanded')){{r.classList.remove('expanded');d.classList.remove('open');}}else{{r.classList.add('expanded');d.classList.add('open');}}}})()"
                                                        );
                                                        document::eval(&js);
                                                    },
                                                    div { class: "ac-status-bar {status}" }
                                                    div { class: "ac-tool-icon", "{emoji}" }
                                                    div { class: "ac-tool-info",
                                                        div { class: "ac-tool-name", "{tool_name_val}" }
                                                        span { class: "ac-cat-chip {cat}", "{label}" }
                                                    }
                                                    div { class: "{duration_cls}", "{duration_text}" }
                                                    div { span { class: "{pill_cls}", "{pill_text}" } }
                                                    div { class: "{risk_cls}", "{risk_text}" }
                                                }
                                                div {
                                                    class: "ac-tool-detail",
                                                    id: "{detail_id_clone}",
                                                    if !reasoning.is_empty() || !started.is_empty() {
                                                        div { class: "ac-tool-detail-inner",
                                                            if !reasoning.is_empty() {
                                                                div { class: "ac-reasoning-block", "{reasoning}" }
                                                            }
                                                            if !started.is_empty() {
                                                                div { class: "ac-detail-grid",
                                                                    span { class: "ac-detail-label", "Started" }
                                                                    span { class: "ac-detail-value", "{started}" }
                                                                    if !duration_text.is_empty() && status != "running" && duration_text != "\u{2014}" {
                                                                        span { class: "ac-detail-label", "Duration" }
                                                                        span { class: "ac-detail-value", "{duration_text}" }
                                                                    }
                                                                    span { class: "ac-detail-label", "Status" }
                                                                    if status == "completed" {
                                                                        span { class: "ac-detail-value", style: "color: var(--success, #16a34a);", "Completed" }
                                                                    } else if status == "failed" {
                                                                        span { class: "ac-detail-value", style: "color: var(--danger, #dc2626);", "Failed" }
                                                                    } else if status == "running" {
                                                                        span { class: "ac-detail-value", style: "color: var(--warning, #d97706);", "Running" }
                                                                    } else {
                                                                        span { class: "ac-detail-value", "{status}" }
                                                                    }
                                                                }
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}