use chrono::SecondsFormat;

use crate::{models::TriageRecord, pipeline::orchestrator::TriageOutcome};

#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct TriageViewModel {
    pub record_id: String,
    pub patient_id: String,
    pub reason: String,
    pub redacted_note: String,
    pub pii_map: Vec<crate::shield::redact::PiiMatch>,
    pub triage_result: String,
    pub model_used: String,
    pub device_used: String,
    pub cid: String,
    pub transaction_hash: String,
    pub redaction_proof: crate::pipeline::proof::RedactionProof,
    pub consortium_attestations: Vec<crate::models::ConsortiumAttestation>,
    pub enrichment: crate::models::MedicalEnrichment,
    pub degraded_reason: Option<String>,
    pub created_at: String,
}

impl TriageViewModel {
    pub fn from_outcome(outcome: TriageOutcome) -> Self {
        let record = outcome.record;
        Self {
            record_id: record.record_id.as_str().to_string(),
            patient_id: record.patient_id.as_str().to_string(),
            reason: record.reason,
            redacted_note: record.redacted_note,
            pii_map: record.pii_map,
            triage_result: record.triage_result,
            model_used: record.model_used,
            device_used: record.device_used,
            cid: record.cid,
            transaction_hash: record.transaction_hash,
            redaction_proof: record.redaction_proof,
            consortium_attestations: record.consortium_attestations,
            enrichment: record.enrichment,
            degraded_reason: record.degraded_reason,
            created_at: record.created_at.to_rfc3339_opts(SecondsFormat::Secs, true),
        }
    }
}

pub fn render_dashboard_fragment(records: &[TriageRecord]) -> String {
    if records.is_empty() {
        return r#"<div class='rounded-2xl border border-dashed border-slate-300 p-6 text-slate-500'>No triage history yet. Run a case and it appears here instantly.</div>"#.to_string();
    }

    let rows = records.iter().rev().take(12).map(render_history_row).collect::<String>();
    format!(r#"
        <div class='overflow-hidden rounded-3xl border border-slate-200 bg-white shadow-sm'>
            <div class='border-b border-slate-200 px-5 py-4'>
                <div class='text-xs uppercase tracking-[0.25em] text-slate-400'>Live Memory</div>
                <h3 class='mt-1 text-lg font-semibold text-slate-900'>Recent triage decisions</h3>
            </div>
            <div class='divide-y divide-slate-100'>
                {}
            </div>
        </div>
    "#, rows)
}

fn render_history_row(record: &TriageRecord) -> String {
    format!(r#"
        <div class='grid gap-3 px-5 py-4 md:grid-cols-4'>
            <div>
                <div class='text-xs text-slate-400'>Record</div>
                <div class='font-mono text-sm text-slate-900'>{}</div>
            </div>
            <div>
                <div class='text-xs text-slate-400'>Patient</div>
                <div class='text-sm font-medium text-slate-900'>{}</div>
            </div>
            <div>
                <div class='text-xs text-slate-400'>Decision</div>
                <div class='text-sm text-slate-700'>{}</div>
            </div>
            <div>
                <div class='text-xs text-slate-400'>Audit</div>
                <div class='text-sm text-slate-700'>CID {}</div>
            </div>
        </div>
    "#, record.record_id.as_str(), escape_html(record.patient_id.as_str()), escape_html(&record.triage_result), escape_html(&record.cid))
}

pub fn render_triage_fragment(vm: &TriageViewModel) -> String {
    let pii_rows = if vm.pii_map.is_empty() {
        "<li class='text-slate-500'>No PHI patterns detected by the deterministic shield.</li>".to_string()
    } else {
        vm.pii_map.iter().map(|item| {
            format!(r#"<li class='flex gap-2'><span class='text-rose-500'>●</span><span><strong>{}</strong> → <code class='rounded bg-slate-100 px-1.5 py-0.5'>{}</code></span></li>"#, escape_html(&item.original), escape_html(&item.placeholder))
        }).collect::<String>()
    };

    let attestation_rows = vm.consortium_attestations.iter().map(|a| {
        format!(r#"<div class='rounded-2xl border border-slate-200 bg-slate-50 p-3'><div class='font-medium text-slate-900'>{}</div><div class='text-xs text-slate-500'>{}</div><div class='mt-2 font-mono text-xs text-slate-600 break-all'>{}</div></div>"#, escape_html(&a.hospital), escape_html(&a.signature_status), escape_html(&a.attestation_hash))
    }).collect::<String>();

    let pubmed_rows = if vm.enrichment.pubmed_hits.is_empty() {
        "<div class='text-sm text-slate-500'>No PubMed results matched this case.</div>".to_string()
    } else {
        vm.enrichment.pubmed_hits.iter().map(|hit| {
            format!(r#"<a class='block rounded-2xl border border-slate-200 p-3 hover:bg-slate-50' href='{}' target='_blank' rel='noreferrer'><div class='text-xs text-slate-400'>PubMed {}</div><div class='text-sm font-medium text-slate-900'>{}</div></a>"#, escape_html(&hit.url), escape_html(&hit.pmid), escape_html(&hit.title))
        }).collect::<String>()
    };

    let degraded = vm.degraded_reason.as_ref().map(|reason| format!(r#"<div class='rounded-2xl border border-amber-200 bg-amber-50 p-4 text-amber-900'><div class='font-semibold'>Backend degraded mode</div><div class='text-sm mt-1'>{}</div></div>"#, escape_html(reason))).unwrap_or_default();

    format!(r#"
        <div class='space-y-6 rounded-3xl border border-slate-200 bg-white p-6 shadow-xl'>
            <div class='flex flex-wrap items-center justify-between gap-3'>
                <div>
                    <div class='text-xs uppercase tracking-[0.25em] text-slate-400'>Triage Result</div>
                    <h3 class='mt-1 text-2xl font-semibold text-slate-900'>Case {}</h3>
                </div>
                <div class='rounded-full bg-emerald-50 px-3 py-1 text-sm font-medium text-emerald-700'>{}</div>
            </div>

            {}

            <div class='grid gap-4 lg:grid-cols-2'>
                <div class='rounded-3xl bg-slate-50 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>Clinical synthesis</div>
                    <p class='whitespace-pre-wrap text-sm leading-7 text-slate-700'>{}</p>
                </div>
                <div class='space-y-4 rounded-3xl bg-slate-50 p-4'>
                    <div>
                        <div class='mb-2 text-sm font-semibold text-slate-900'>Redacted note</div>
                        <pre class='whitespace-pre-wrap rounded-2xl bg-slate-950 p-4 text-xs leading-6 text-emerald-200'>{}</pre>
                    </div>
                    <div>
                        <div class='mb-2 text-sm font-semibold text-slate-900'>Redaction proof</div>
                        <div class='break-all rounded-2xl bg-slate-950 p-4 font-mono text-xs text-sky-200'>{}</div>
                        <div class='mt-2 text-xs text-slate-500'>Verified: {}</div>
                    </div>
                </div>
            </div>

            <div class='grid gap-4 lg:grid-cols-2'>
                <div class='rounded-3xl border border-slate-200 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>PII shield map</div>
                    <ul class='space-y-2 text-sm text-slate-700'>{}</ul>
                </div>
                <div class='rounded-3xl border border-slate-200 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>Consortium attestations</div>
                    <div class='grid gap-3'>{}</div>
                </div>
            </div>

            <div class='grid gap-4 lg:grid-cols-2'>
                <div class='rounded-3xl border border-slate-200 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>PubMed enrichment</div>
                    <div class='space-y-3'>{}</div>
                </div>
                <div class='rounded-3xl border border-slate-200 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>On-chain audit</div>
                    <div class='space-y-2 text-sm text-slate-700'>
                        <div><span class='text-slate-400'>CID:</span> <span class='font-mono break-all'>{}</span></div>
                        <div><span class='text-slate-400'>Tx:</span> <span class='font-mono break-all'>{}</span></div>
                        <div><span class='text-slate-400'>Model:</span> {} · {}</div>
                        <div><span class='text-slate-400'>Created:</span> {}</div>
                    </div>
                </div>
            </div>
        </div>
    "#, escape_html(&vm.record_id), escape_html(&vm.reason), degraded, escape_html(&vm.triage_result), escape_html(&vm.redacted_note), escape_html(&vm.redaction_proof.proof), vm.redaction_proof.verified, pii_rows, attestation_rows, pubmed_rows, escape_html(&vm.cid), escape_html(&vm.transaction_hash), escape_html(&vm.model_used), escape_html(&vm.device_used), escape_html(&vm.created_at))
}

pub fn render_dicom_fragment(result: &crate::pipeline::dicom::DicomRedactionResult) -> String {
    let fields = if result.report.detected_fields.is_empty() {
        "<li class='text-slate-500'>No structured DICOM fields were parsed in this demo file.</li>".to_string()
    } else {
        result.report.detected_fields.iter().map(|field| format!(r#"<li>{}</li>"#, escape_html(field))).collect::<String>()
    };

    format!(r#"
        <div class='space-y-4 rounded-3xl border border-slate-200 bg-white p-5 shadow-lg'>
            <div>
                <div class='text-xs uppercase tracking-[0.25em] text-slate-400'>DICOM Shield</div>
                <h3 class='mt-1 text-xl font-semibold text-slate-900'>{}</h3>
            </div>
            <div class='grid gap-4 lg:grid-cols-2'>
                <div class='rounded-2xl bg-slate-50 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>Parsed fields</div>
                    <ul class='list-disc space-y-1 pl-5 text-sm text-slate-700'>{}</ul>
                </div>
                <div class='rounded-2xl bg-slate-50 p-4'>
                    <div class='mb-2 text-sm font-semibold text-slate-900'>Burned-in OCR preview</div>
                    <div class='whitespace-pre-wrap text-sm text-slate-700'>{}</div>
                </div>
            </div>
            <div>
                <div class='mb-2 text-sm font-semibold text-slate-900'>Redacted preview</div>
                <pre class='whitespace-pre-wrap rounded-2xl bg-slate-950 p-4 text-xs text-emerald-200'>{}</pre>
            </div>
        </div>
    "#, escape_html(&result.report.filename), fields, escape_html(&result.report.burned_in_text_preview), escape_html(&result.report.redacted_preview))
}

fn escape_html(input: &str) -> String {
    html_escape::encode_text(input).to_string()
}