import XCTest
@testable import Ten31Transcripts

final class RecapTests: XCTestCase {

    private func entry(_ off: Double, _ end: Double, _ who: String, _ text: String) -> RecapAnalyzer.Entry {
        .init(offset: off, end: end, speaker: who, text: text)
    }

    // MARK: - Parsing

    func testParseSectionsHandlesStringIndices() {
        let json = #"{"sections":[{"title":"Intro","summary":"hi","startIndex":"0","endIndex":3},{"title":"Topic","summary":"x","startIndex":4,"endIndex":9}]}"#
        let secs = RecapAnalyzer.parseSections(json)
        XCTAssertEqual(secs.count, 2)
        XCTAssertEqual(secs[0].title, "Intro")
        XCTAssertEqual(secs[0].startIndex, 0)
        XCTAssertEqual(secs[1].endIndex, 9)
    }

    func testParseSectionsStripsCodeFence() {
        let json = "```json\n{\"sections\":[{\"title\":\"A\",\"summary\":\"\",\"startIndex\":0,\"endIndex\":1}]}\n```"
        XCTAssertEqual(RecapAnalyzer.parseSections(json).count, 1)
    }

    private var sampleTemplate: RecapTemplate {
        RecapTemplate(id: "t", name: "T", includeTLDR: true, sections: [
            .init(id: "a", title: "Decisions", kind: .items, instruction: ""),
            .init(id: "b", title: "Takeaways", kind: .bullets, instruction: ""),
        ])
    }

    func testParseExtrasGeneric() {
        let json = #"{"tldr":"They discussed the roadmap.","primary_speakers":["Grant","Caitlyn"],"sec_0":[{"text":"Ship dual-channel","who":"Grant","when":72,"note":null}],"sec_1":["faster","cheaper"]}"#
        let x = RecapAnalyzer.parseExtras(json, template: sampleTemplate)
        XCTAssertNotNil(x)
        XCTAssertEqual(x?.tldr, "They discussed the roadmap.")
        XCTAssertEqual(x?.primarySpeakers, ["Grant", "Caitlyn"])
        XCTAssertEqual(x?.sections.count, 2)
        XCTAssertEqual(x?.sections[0].kind, .items)
        XCTAssertEqual(x?.sections[0].items.first?.text, "Ship dual-channel")
        XCTAssertEqual(x?.sections[0].items.first?.who, "Grant")
        XCTAssertEqual(x?.sections[0].items.first?.when, 72)
        XCTAssertEqual(x?.sections[1].kind, .bullets)
        XCTAssertEqual(x?.sections[1].bullets, ["faster", "cheaper"])
    }

    func testParseExtrasDropsNullStrings() {
        let template = RecapTemplate(id: "t", name: "T", sections: [.init(id: "a", title: "Actions", kind: .items, instruction: "")])
        let json = #"{"tldr":"s","primary_speakers":[],"sec_0":[{"text":"do it","who":"null","note":""}]}"#
        let x = RecapAnalyzer.parseExtras(json, template: template)
        XCTAssertNil(x?.sections.first?.items.first?.who)
        XCTAssertNil(x?.sections.first?.items.first?.note)
        XCTAssertEqual(x?.sections.first?.items.first?.text, "do it")
    }

    func testExtrasPromptBuildsFromTemplate() {
        let template = RecapTemplate(id: "t", name: "T", includeTLDR: true, sections: [
            .init(id: "a", title: "Risks", kind: .bullets, instruction: "List the risks."),
            .init(id: "b", title: "Decisions", kind: .items, instruction: "List decisions."),
        ])
        let file = SpeakersFile(sessionId: "s", app: "meet", durationSec: 60, speakers: [],
                                segments: [.init(start: 0, end: 2, speaker: "A", text: "hi")], models: [:])
        let prompt = RecapAnalyzer.extrasPrompt(file: file, entries: RecapAnalyzer.entries(from: file),
                                                sections: [], template: template)
        XCTAssertTrue(prompt.contains("sec_0"))
        XCTAssertTrue(prompt.contains("sec_1"))
        XCTAssertTrue(prompt.contains("Risks"))
        XCTAssertTrue(prompt.contains("List the risks."))
        XCTAssertTrue(prompt.contains("tldr"))
    }

    func testExtrasPromptOmitsTLDRWhenDisabled() {
        let template = RecapTemplate(id: "t", name: "T", includeTLDR: false,
                                     sections: [.init(id: "a", title: "X", kind: .paragraph, instruction: "y")])
        let file = SpeakersFile(sessionId: "s", app: "meet", durationSec: 60, speakers: [],
                                segments: [.init(start: 0, end: 2, speaker: "A", text: "hi")], models: [:])
        let prompt = RecapAnalyzer.extrasPrompt(file: file, entries: RecapAnalyzer.entries(from: file),
                                                sections: [], template: template)
        XCTAssertFalse(prompt.contains("\"tldr\""))
    }

    // MARK: - Stitch / windows

    func testStitchDropsContainedAndTrimsOverlap() {
        let secs = [
            TopicSection(title: "A", summary: "", startIndex: 0, endIndex: 5),
            TopicSection(title: "B-contained", summary: "", startIndex: 2, endIndex: 4),
            TopicSection(title: "C-overlap", summary: "", startIndex: 4, endIndex: 9),
        ]
        let out = RecapAnalyzer.stitch(secs)
        XCTAssertEqual(out.map { $0.title }, ["A", "C-overlap"])
        XCTAssertEqual(out[0].startIndex, 0); XCTAssertEqual(out[0].endIndex, 5)
        XCTAssertEqual(out[1].startIndex, 6); XCTAssertEqual(out[1].endIndex, 9)   // trimmed front
    }

    func testPlanWindowsSingleForShortCall() {
        let entries = (0..<10).map { entry(Double($0 * 10), Double($0 * 10 + 5), "A", "x") }   // ~100s
        let w = RecapAnalyzer.planWindows(entries)
        XCTAssertEqual(w.count, 1)
        XCTAssertEqual(w[0].startIdx, 0); XCTAssertEqual(w[0].endIdx, 9)
    }

    func testPlanWindowsMultipleForLongCall() {
        // 40 entries at 60s spacing → ~39 min, over the 25-min cutoff.
        let entries = (0..<40).map { entry(Double($0 * 60), Double($0 * 60 + 30), "A", "x") }
        let w = RecapAnalyzer.planWindows(entries)
        XCTAssertGreaterThan(w.count, 1)
        XCTAssertEqual(w.first?.startIdx, 0)
        XCTAssertEqual(w.last?.endIdx, 39)                 // last window reaches the end
        for i in 1..<w.count { XCTAssertGreaterThan(w[i].bodyStartIdx, w[i - 1].bodyStartIdx) }
    }

    // MARK: - Entries + formatting

    func testEntriesFiltersEmptyAndSorts() {
        let file = SpeakersFile(sessionId: "s", app: "meet", durationSec: 30,
            speakers: [],
            segments: [
                .init(start: 10, end: 12, speaker: "B", text: "second"),
                .init(start: 0, end: 2, speaker: "A", text: "first"),
                .init(start: 5, end: 6, speaker: "A", text: "   "),   // empty → dropped
            ], models: [:])
        let e = RecapAnalyzer.entries(from: file)
        XCTAssertEqual(e.map { $0.text }, ["first", "second"])
    }

    func testMmss() {
        XCTAssertEqual(RecapAnalyzer.mmss(72), "1:12")
        XCTAssertEqual(RecapAnalyzer.mmss(3725), "1:02:05")
    }

    // MARK: - Render smoke test

    func testMarkdownRenders() {
        let file = SpeakersFile(sessionId: "2026-06-06T11-43-12_meet", app: "meet", durationSec: 80,
            speakers: [.init(name: "Grant", source: "mic_channel", overlapConfidence: nil, matchSimilarity: nil)],
            segments: [
                .init(start: 0, end: 4, speaker: "Grant", text: "Now we got a call going on."),
                .init(start: 72, end: 74, speaker: "Caitlyn", text: "Go Bitcoin."),
            ], models: [:])
        let extras = RecapExtras(tldr: "A quick test call.", primarySpeakers: ["Grant"], sections: [
            RenderedSection(title: "Action Items", kind: .items, items: [RecapItem(text: "Ship it", who: "Grant", when: 3, note: nil)]),
            RenderedSection(title: "Key Quotes", kind: .items, items: [RecapItem(text: "Go Bitcoin", who: "Caitlyn", when: 72, note: "tone")]),
        ])
        let result = RecapResult(sections: [TopicSection(title: "Call start", summary: "Grant opens.", startIndex: 0, endIndex: 1)], extras: extras)
        let entries = RecapAnalyzer.entries(from: file)
        let md = RecapRenderer.markdown(file: file, result: result, title: "Meet call", entries: entries)
        XCTAssertTrue(md.contains("## Summary"))
        XCTAssertTrue(md.contains("## Action Items"))
        XCTAssertTrue(md.contains("## Topics"))
        XCTAssertTrue(md.contains("## Full Transcript"))
        XCTAssertTrue(md.contains("Go Bitcoin"))
        XCTAssertTrue(md.contains("Grant"))
        // HTML smoke
        let html = RecapRenderer.html(file: file, result: result, title: "Meet call", entries: entries)
        XCTAssertTrue(html.contains("<!DOCTYPE html>"))
        XCTAssertTrue(html.contains("Go Bitcoin"))
    }
}