/**
 * HTTP client for Ezer Mishpati legal-ai REST API.
 */

export class LegalApi {
	constructor(private baseUrl: string) {}

	private async request<T>(path: string, init?: RequestInit): Promise<T> {
		const res = await fetch(`${this.baseUrl}${path}`, {
			...init,
			headers: {
				"Content-Type": "application/json",
				...init?.headers,
			},
		});
		if (!res.ok) {
			const text = await res.text();
			throw new Error(`Legal API ${res.status}: ${text}`);
		}
		return res.json() as Promise<T>;
	}

	async listCases(): Promise<CaseSummary[]> {
		return this.request("/api/cases");
	}

	async getCase(caseNumber: string): Promise<CaseDetails> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}/details`);
	}

	async createCase(data: CaseCreateInput): Promise<CaseDetails> {
		return this.request("/api/cases/create", {
			method: "POST",
			body: JSON.stringify(data),
		});
	}

	async updateCase(
		caseNumber: string,
		data: CaseUpdateInput,
	): Promise<CaseDetails> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}`, {
			method: "PUT",
			body: JSON.stringify(data),
		});
	}

	async getCaseStatus(caseNumber: string): Promise<WorkflowStatus> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}/status`);
	}

	async search(
		query: string,
		limit = 10,
		sectionType = "",
	): Promise<SearchResult[]> {
		const params = new URLSearchParams({ query, limit: String(limit) });
		if (sectionType) params.set("section_type", sectionType);
		return this.request(`/api/search?${params}`);
	}

	async searchCase(
		caseNumber: string,
		query: string,
		limit = 10,
	): Promise<SearchResult[]> {
		const params = new URLSearchParams({ query, limit: String(limit) });
		return this.request(
			`/api/cases/${encodeURIComponent(caseNumber)}/search?${params}`,
		);
	}

	async getTemplate(caseNumber: string): Promise<{ template: string }> {
		return this.request(
			`/api/cases/${encodeURIComponent(caseNumber)}/template`,
		);
	}

	async getProcessingStatus(): Promise<ProcessingStatus> {
		return this.request("/api/processing-status");
	}

	async health(): Promise<{ status: string }> {
		return this.request("/health");
	}

	// ── New methods for expanded workflow ──

	async listDocuments(caseNumber: string): Promise<DocumentInfo[]> {
		const details = await this.getCase(caseNumber);
		return details.documents || [];
	}

	async getDocumentText(docId: string): Promise<string> {
		return this.request(`/api/documents/${docId}/text`);
	}

	async findSimilarCases(caseNumber: string): Promise<SearchResult[]> {
		return this.request(
			`/api/cases/${encodeURIComponent(caseNumber)}/search?query=similar&limit=5`,
		);
	}

	async setOutcome(
		caseNumber: string,
		outcome: string,
		reasoning?: string,
	): Promise<{ status: string }> {
		return this.request(
			`/api/cases/${encodeURIComponent(caseNumber)}/outcome`,
			{
				method: "POST",
				body: JSON.stringify({ outcome, reasoning: reasoning || "" }),
			},
		);
	}

	async getClaims(caseNumber: string): Promise<ClaimsResponse> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}/claims`);
	}

	async setDirection(
		caseNumber: string,
		directionDoc: Record<string, unknown>,
	): Promise<{ status: string }> {
		return this.request(
			`/api/cases/${encodeURIComponent(caseNumber)}/direction`,
			{
				method: "POST",
				body: JSON.stringify({ direction_doc: directionDoc }),
			},
		);
	}

	async runQA(caseNumber: string): Promise<QAResponse> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}/qa`, {
			method: "POST",
		});
	}

	async triggerLearning(caseNumber: string): Promise<{ status: string }> {
		return this.request(`/api/cases/${encodeURIComponent(caseNumber)}/learn`, {
			method: "POST",
		});
	}

	async getStyleGuide(): Promise<string> {
		// Return static style guide reference
		return "ראה skill-legal-decision/SKILL.md — מדריך סגנון מלא של דפנה תמיר";
	}

	/**
	 * Recent conclusions of prior heartbeat runs across a case's issues (#220,
	 * "seance"). Lets a resuming agent read what earlier sessions concluded
	 * instead of re-deriving context from scratch.
	 */
	async getPredecessorForCase(
		caseNumber: string,
		limit = 5,
	): Promise<PredecessorResponse> {
		return this.request(
			`/api/operations/cases/${encodeURIComponent(caseNumber)}/predecessor?limit=${limit}`,
		);
	}
}

// Types

export interface CaseSummary {
	case_number: string;
	title: string;
	status: string;
}

export interface CaseDetails {
	id: string;
	case_number: string;
	title: string;
	status: string;
	appellants: string[];
	respondents: string[];
	subject: string;
	property_address: string;
	expected_outcome: string;
	documents?: DocumentInfo[];
	[key: string]: unknown;
}

export interface CaseCreateInput {
	case_number: string;
	title: string;
	appellants?: string[];
	respondents?: string[];
	subject?: string;
	property_address?: string;
	permit_number?: string;
	committee_type?: string;
	hearing_date?: string;
	notes?: string;
	expected_outcome?: string;
}

export interface CaseUpdateInput {
	status?: string;
	title?: string;
	subject?: string;
	notes?: string;
	hearing_date?: string;
	decision_date?: string;
	tags?: string[];
	expected_outcome?: string;
}

export interface DocumentInfo {
	id: string;
	title: string;
	doc_type: string;
	extraction_status: string;
	page_count?: number;
}

export interface WorkflowStatus {
	case_number: string;
	title: string;
	status: string;
	documents: Array<{
		title: string;
		type: string;
		extraction: string;
		chunks: number;
		pages?: number;
	}>;
	total_documents: number;
	total_chunks: number;
	has_draft: boolean;
	draft_size_bytes: number;
	next_steps: string[];
}

export interface SearchResult {
	score: number;
	case_number?: string;
	document: string;
	section: string;
	page: number;
	content: string;
}

export interface ProcessingStatus {
	cases: number;
	documents: number;
	pending_processing: number;
	chunks: number;
	style_corpus_entries: number;
	style_patterns: number;
}

export interface ClaimsResponse {
	case_number: string;
	claims: Record<
		string,
		Array<{ party_role: string; claim_text: string; claim_index: number }>
	>;
	total: number;
}

export interface QAResponse {
	passed: boolean;
	checks: Array<{
		check_name: string;
		passed: boolean;
		severity: string;
		details: string;
	}>;
	status: string;
}

export interface PredecessorRun {
	run_id: string;
	status: string;
	started_at: string | null;
	finished_at: string | null;
	summary: string | null;
	error_code: string | null;
	session_id: string | null;
	agent_name: string | null;
	identifier: string | null;
}

export interface PredecessorResponse {
	ok: boolean;
	case_number: string;
	runs: PredecessorRun[];
}