import { isAbsolute, relative, resolve, sep } from "node:path";
import { truncateToWidth, visibleWidth } from "@earendil-works/pi-tui";
import { areExperimentalFeaturesEnabled } from "../../../core/experimental.js";
import { addUsageToTotals, createUsageTotals } from "../../../core/usage-totals.js";
import { theme } from "../theme/theme.js";
/**
 * Sanitize text for display in a single-line status.
 * Removes newlines, tabs, carriage returns, and other control characters.
 */
function sanitizeStatusText(text) {
    // Replace newlines, tabs, carriage returns with space, then collapse multiple spaces
    return text
        .replace(/[\r\n\t]/g, " ")
        .replace(/ +/g, " ")
        .trim();
}
/**
 * Format token counts for compact footer display.
 */
export function formatTokens(count) {
    if (count < 1000)
        return count.toString();
    if (count < 10000)
        return `${(count / 1000).toFixed(1)}k`;
    if (count < 1000000)
        return `${Math.round(count / 1000)}k`;
    if (count < 10000000)
        return `${(count / 1000000).toFixed(1)}M`;
    return `${Math.round(count / 1000000)}M`;
}
export function formatCwdForFooter(cwd, home) {
    if (!home)
        return cwd;
    const resolvedCwd = resolve(cwd);
    const resolvedHome = resolve(home);
    const relativeToHome = relative(resolvedHome, resolvedCwd);
    const isInsideHome = relativeToHome === "" ||
        (relativeToHome !== ".." && !relativeToHome.startsWith(`..${sep}`) && !isAbsolute(relativeToHome));
    if (!isInsideHome)
        return cwd;
    return relativeToHome === "" ? "~" : `~${sep}${relativeToHome}`;
}
/**
 * Footer component that shows pwd, token stats, and context usage.
 * Computes token/context stats from session, gets git branch and extension statuses from provider.
 */
export class FooterComponent {
    autoCompactEnabled = true;
    session;
    footerData;
    constructor(session, footerData) {
        this.session = session;
        this.footerData = footerData;
    }
    setSession(session) {
        this.session = session;
    }
    setAutoCompactEnabled(enabled) {
        this.autoCompactEnabled = enabled;
    }
    /**
     * No-op: git branch caching now handled by provider.
     * Kept for compatibility with existing call sites in interactive-mode.
     */
    invalidate() {
        // No-op: git branch is cached/invalidated by provider
    }
    /**
     * Clean up resources.
     * Git watcher cleanup now handled by provider.
     */
    dispose() {
        // Git watcher cleanup handled by provider
    }
    render(width) {
        const state = this.session.state;
        // Calculate cumulative usage from ALL session entries (not just post-compaction messages)
        const usageTotals = createUsageTotals();
        let latestCacheHitRate;
        for (const entry of this.session.sessionManager.getEntries()) {
            if (entry.type === "message" && entry.message.role === "assistant") {
                addUsageToTotals(usageTotals, entry.message.usage);
                const latestPromptTokens = entry.message.usage.input + entry.message.usage.cacheRead + entry.message.usage.cacheWrite;
                latestCacheHitRate =
                    latestPromptTokens > 0 ? (entry.message.usage.cacheRead / latestPromptTokens) * 100 : undefined;
            }
            else if (entry.type === "message" && entry.message.role === "toolResult" && entry.message.usage) {
                addUsageToTotals(usageTotals, entry.message.usage);
            }
            else if ((entry.type === "branch_summary" || entry.type === "compaction") && entry.usage) {
                addUsageToTotals(usageTotals, entry.usage);
            }
        }
        // Calculate context usage from session (handles compaction correctly).
        // After compaction, tokens are unknown until the next LLM response.
        const contextUsage = this.session.getContextUsage();
        const contextWindow = contextUsage?.contextWindow ?? state.model?.contextWindow ?? 0;
        const contextPercentValue = contextUsage?.percent ?? 0;
        const contextPercent = contextUsage?.percent !== null ? contextPercentValue.toFixed(1) : "?";
        // Replace home directory with ~
        let pwd = formatCwdForFooter(this.session.sessionManager.getCwd(), process.env.HOME || process.env.USERPROFILE);
        // Add git branch if available
        const branch = this.footerData.getGitBranch();
        if (branch) {
            pwd = `${pwd} (${branch})`;
        }
        // Add session name if set
        const sessionName = this.session.sessionManager.getSessionName();
        if (sessionName) {
            pwd = `${pwd} • ${sessionName}`;
        }
        // Build stats line
        const statsParts = [];
        if (usageTotals.input)
            statsParts.push(`↑${formatTokens(usageTotals.input)}`);
        if (usageTotals.output)
            statsParts.push(`↓${formatTokens(usageTotals.output)}`);
        if (usageTotals.cacheRead)
            statsParts.push(`R${formatTokens(usageTotals.cacheRead)}`);
        if (usageTotals.cacheWrite)
            statsParts.push(`W${formatTokens(usageTotals.cacheWrite)}`);
        if ((usageTotals.cacheRead > 0 || usageTotals.cacheWrite > 0) && latestCacheHitRate !== undefined) {
            statsParts.push(`CH${latestCacheHitRate.toFixed(1)}%`);
        }
        // Kimi Coding is subscription-backed despite using API-key authentication.
        const usingSubscription = state.model
            ? state.model.provider === "kimi-coding" || this.session.modelRuntime.isUsingSubscription(state.model.provider)
            : false;
        if (usageTotals.cost || usingSubscription) {
            const costStr = `$${usageTotals.cost.toFixed(3)}${usingSubscription ? " (sub)" : ""}`;
            statsParts.push(costStr);
        }
        // Colorize context percentage based on usage
        let contextPercentStr;
        const autoIndicator = this.autoCompactEnabled ? " (auto)" : "";
        const contextPercentDisplay = contextPercent === "?"
            ? `?/${formatTokens(contextWindow)}${autoIndicator}`
            : `${contextPercent}%/${formatTokens(contextWindow)}${autoIndicator}`;
        if (contextPercentValue > 90) {
            contextPercentStr = theme.fg("error", contextPercentDisplay);
        }
        else if (contextPercentValue > 70) {
            contextPercentStr = theme.fg("warning", contextPercentDisplay);
        }
        else {
            contextPercentStr = contextPercentDisplay;
        }
        statsParts.push(contextPercentStr);
        if (areExperimentalFeaturesEnabled()) {
            statsParts.push(`${theme.fg("dim", "•")} ${theme.bold(theme.fg("warning", "xp"))}`);
        }
        let statsLeft = statsParts.join(" ");
        // Add model name on the right side, plus thinking level if model supports it
        const modelName = state.model?.id || "no-model";
        let statsLeftWidth = visibleWidth(statsLeft);
        // If statsLeft is too wide, truncate it
        if (statsLeftWidth > width) {
            statsLeft = truncateToWidth(statsLeft, width, "...");
            statsLeftWidth = visibleWidth(statsLeft);
        }
        // Calculate available space for padding (minimum 2 spaces between stats and model)
        const minPadding = 2;
        // Add thinking level indicator if model supports reasoning
        let rightSideWithoutProvider = modelName;
        if (state.model?.reasoning) {
            const thinkingLevel = state.thinkingLevel || "off";
            rightSideWithoutProvider =
                thinkingLevel === "off" ? `${modelName} • thinking off` : `${modelName} • ${thinkingLevel}`;
        }
        // Prepend the provider in parentheses if there are multiple providers and there's enough room
        let rightSide = rightSideWithoutProvider;
        if (this.footerData.getAvailableProviderCount() > 1 && state.model) {
            rightSide = `(${state.model.provider}) ${rightSideWithoutProvider}`;
            if (statsLeftWidth + minPadding + visibleWidth(rightSide) > width) {
                // Too wide, fall back
                rightSide = rightSideWithoutProvider;
            }
        }
        const rightSideWidth = visibleWidth(rightSide);
        const totalNeeded = statsLeftWidth + minPadding + rightSideWidth;
        let statsLine;
        if (totalNeeded <= width) {
            // Both fit - add padding to right-align model
            const padding = " ".repeat(width - statsLeftWidth - rightSideWidth);
            statsLine = statsLeft + padding + rightSide;
        }
        else {
            // Need to truncate right side
            const availableForRight = width - statsLeftWidth - minPadding;
            if (availableForRight > 0) {
                const truncatedRight = truncateToWidth(rightSide, availableForRight, "");
                const truncatedRightWidth = visibleWidth(truncatedRight);
                const padding = " ".repeat(Math.max(0, width - statsLeftWidth - truncatedRightWidth));
                statsLine = statsLeft + padding + truncatedRight;
            }
            else {
                // Not enough space for right side at all
                statsLine = statsLeft;
            }
        }
        // Apply dim to each part separately. statsLeft may contain color codes (for context %)
        // that end with a reset, which would clear an outer dim wrapper. So we dim the parts
        // before and after the colored section independently.
        const dimStatsLeft = theme.fg("dim", statsLeft);
        const remainder = statsLine.slice(statsLeft.length); // padding + rightSide
        const dimRemainder = theme.fg("dim", remainder);
        const pwdLine = truncateToWidth(theme.fg("dim", pwd), width, theme.fg("dim", "..."));
        const lines = [pwdLine, dimStatsLeft + dimRemainder];
        // Add extension statuses on a single line, sorted by key alphabetically
        const extensionStatuses = this.footerData.getExtensionStatuses();
        if (extensionStatuses.size > 0) {
            const sortedStatuses = Array.from(extensionStatuses.entries())
                .sort(([a], [b]) => a.localeCompare(b))
                .map(([, text]) => sanitizeStatusText(text));
            const statusLine = sortedStatuses.join(" ");
            // Truncate to terminal width with dim ellipsis for consistency with footer style
            lines.push(truncateToWidth(statusLine, width, theme.fg("dim", "...")));
        }
        return lines;
    }
}
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